ui: group display istead of teacher in teacher schedule

slotIndex is a per-department index of non-empty intervals, not a time.
Merging all departments of a period by slotIndex and deriving the slot
time from the first inserted lesson produced shifted times (e.g. Meltsov
10:00 shown at 11:45) depending on sync order. Group by lesson start
minute instead so each department's real times are kept.

Add debug logging for teacher schedule sync/build and debounce teacher
search in picker.

.gitea/workflows/release.yml

@@ -0,0 +1,125 @@
+# Требуемые секреты репозитория (Settings → Actions → Secrets):
+#   ANDROID_KEYSTORE        — содержимое .jks файла (base64-кодированное)
+#   ANDROID_KEYSTORE_PASSWORD
+#   ANDROID_KEY_ALIAS
+#   ANDROID_KEY_PASSWORD
+
+name: Release APK
+
+on:
+  workflow_dispatch:
+    inputs:
+      release_notes:
+        description: 'Текст описания релиза (Markdown), можно оставить пустым'
+        required: false
+        default: ''
+        type: string
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      releases: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        # Ставим JDK вручную и явно прописываем JAVA_HOME.
+        # actions/setup-java не всегда передаёт JAVA_HOME дальше в Gitea Actions.
+        run: |
+          set -euxo pipefail
+          cd /tmp
+          wget -q https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.12%2B7/OpenJDK17U-jdk_x64_linux_hotspot_17.0.12_7.tar.gz
+          tar -xzf OpenJDK17U-jdk_x64_linux_hotspot_17.0.12_7.tar.gz -C /opt
+          mv /opt/jdk-17.0.12+7 /opt/java17
+          export JAVA_HOME=/opt/java17
+          export PATH=$JAVA_HOME/bin:$PATH
+          echo "JAVA_HOME=/opt/java17" >> $GITHUB_ENV
+          echo "$JAVA_HOME/bin" >> $GITHUB_PATH
+          java -version
+          javac -version
+
+      - name: Install Android SDK
+        # Устанавливаем command-line tools и нужные компоненты SDK,
+        # затем прописываем ANDROID_HOME (читается Gradle/AGP).
+        run: |
+          set -euxo pipefail
+          echo "ANDROID_HOME=/opt/android-sdk" >> "$GITHUB_ENV"
+          mkdir -p /opt/android-sdk/cmdline-tools
+          wget -q https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip -O /tmp/clt.zip
+          unzip -q /tmp/clt.zip -d /tmp/clt
+          mv /tmp/clt/cmdline-tools /opt/android-sdk/cmdline-tools/latest
+          yes | /opt/android-sdk/cmdline-tools/latest/bin/sdkmanager --licenses >/dev/null 2>&1 || true
+          /opt/android-sdk/cmdline-tools/latest/bin/sdkmanager \
+            "platform-tools" \
+            "platforms;android-36.1" \
+            "build-tools;36.1.0"
+
+      - name: Grant execute permission for gradlew
+        run: |
+          chmod +x gradlew
+          java -version
+
+      # Версия по дате (ГГГГ.ММ.ДД), при совпадении тега добавляем уникальный суффикс.
+      - name: Generate version from date
+        id: version
+        run: |
+          BASE="$(date +%Y.%m.%d)"
+          TAG="v$BASE"
+          SUFFIX=0
+          while git ls-remote --tags origin "$TAG" 2>/dev/null | grep -q "$TAG"; do
+            SUFFIX=$((SUFFIX + 1))
+            TAG="v${BASE}.${SUFFIX}"
+          done
+          echo "version_name=$TAG" >> "$GITHUB_OUTPUT"
+          echo "version_tag=$TAG" >> "$GITHUB_OUTPUT"
+          echo "Generated version: $BASE"
+
+      - name: Restore keystore from secret
+        # Ключ подписи передаётся как base64-секрет и декодируется в файл.
+        run: |
+          if [ -n "$ANDROID_KEYSTORE" ]; then
+            echo "$ANDROID_KEYSTORE" | base64 -d > keystore.jks
+            echo "keystore restored"
+          else
+            echo "::warning::ANDROID_KEYSTORE not set, building unsigned release"
+          fi
+        env:
+          ANDROID_KEYSTORE: ${{ secrets.ANDROID_KEYSTORE }}
+
+      - name: Build release APK
+        run: ./gradlew assembleRelease
+        env:
+          # Версия приложения — дата, сгенерированная на предыдущем шаге.
+          # Читается в app/build.gradle.kts как versionName (для BuildConfig).
+          APP_VERSION: ${{ steps.version.outputs.version_name }}
+          # Переменные окружения, которые читает signingConfig в app/build.gradle.kts
+          ANDROID_KEYSTORE_PATH: ${{ github.workspace }}/keystore.jks
+          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+          ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+          ORG_GRADLE_JVMARGS: '-Xmx2048m'
+          GRADLE_OPTS: '-Dorg.gradle.daemon=false'
+
+      - name: Determine APK path
+        id: apk
+        run: |
+          APK=$(find app/build/outputs/apk/release -name "*.apk" ! -name "*unsigned*" ! -name "*unaligned*" | head -n 1)
+          if [ -z "$APK" ]; then
+            APK=$(find app/build/outputs/apk/release -name "*.apk" | head -n 1)
+          fi
+          echo "apk_path=$APK" >> "$GITHUB_OUTPUT"
+          echo "APK path: $APK"
+
+      - name: Create Gitea Release
+        uses: https://gitea.com/actions/gitea-release-action@v1
+        with:
+          tag_name: ${{ steps.version.outputs.version_tag }}
+          name: ${{ steps.version.outputs.version_name }}
+          body: ${{ github.event.inputs.release_notes }}
+          files: ${{ steps.apk.outputs.apk_path }}
+          token: ${{ secrets.GITEA_TOKEN }}
+          server_url: ${{ gitea.server_url }}

.gitignore

@@ -17,3 +17,10 @@ local.properties
 
 /app/build
 /app/release
+/.idea
+
+# Keystore подписи и его base64-представление для Gitea-секрета
+*.jks
+*.keystore
+/scripts/.keystore.b64
+.keystore.b64

app/build.gradle.kts

@@ -0,0 +1,120 @@
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.compose)
+    alias(libs.plugins.kotlin.ksp)
+}
+
+android {
+    namespace = "agzam.vyatsu"
+    compileSdk {
+        version = release(36) {
+            minorApiLevel = 1
+        }
+    }
+
+    defaultConfig {
+        applicationId = "agzam.vyatsu"
+        minSdk = 28
+        targetSdk = 36
+        versionCode = 1
+        // В продакшн-сборке версию приложения подставляет CI (env APP_VERSION = дата ГГГГ.ММ.ДД).
+        // Локально и при отсутствии переменной — fallback "1.0".
+        versionName = System.getenv("APP_VERSION") ?: "debug"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    // Релизная подпись, ключ и пароли читаются из переменных окружения
+    // release-сборка не подписывается
+    signingConfigs {
+        create("release") {
+            val storePath = System.getenv("ANDROID_KEYSTORE_PATH")
+            if (!storePath.isNullOrBlank()) {
+                storeFile = file(storePath)
+                storePassword = System.getenv("ANDROID_KEYSTORE_PASSWORD")
+                keyAlias = System.getenv("ANDROID_KEY_ALIAS")
+                keyPassword = System.getenv("ANDROID_KEY_PASSWORD")
+            }
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = true
+            isShrinkResources = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+            // Подпись (если есть)
+            if (!System.getenv("ANDROID_KEYSTORE_PATH").isNullOrBlank()) {
+                signingConfig = signingConfigs.getByName("release")
+            }
+        }
+    }
+    testOptions {
+        unitTests.isReturnDefaultValues = true
+        unitTests.all { it.maxHeapSize = "16m" }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+    kotlin {
+        jvmToolchain(11)
+    }
+    buildFeatures {
+        compose = true
+        buildConfig = true
+    }
+}
+
+ksp {
+    arg("room.schemaLocation", "$projectDir/schemas")
+}
+
+dependencies {
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.compose.ui)
+    implementation(libs.androidx.compose.ui.graphics)
+    implementation(libs.androidx.compose.ui.tooling.preview)
+    implementation(libs.androidx.compose.material3)
+    implementation(libs.androidx.compose.material.icons.core)
+    implementation(libs.androidx.navigation.compose)
+    implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(libs.androidx.lifecycle.runtime.compose)
+    implementation(libs.kotlinx.coroutines.android)
+
+    // Room
+    implementation(libs.androidx.room.runtime)
+    implementation(libs.androidx.room.ktx)
+    implementation(libs.androidx.monitor)
+    ksp(libs.androidx.room.compiler)
+
+    // Networking
+    implementation(libs.okhttp)
+    implementation(libs.okhttp.logging)
+
+    // HTML
+    implementation(libs.jsoup)
+
+    // JSON
+    implementation(libs.moshi)
+    implementation(libs.moshi.kotlin)
+    ksp(libs.moshi.kotlin.codegen)
+
+    // PDF
+    implementation(libs.pdfbox.android)
+
+    testImplementation(libs.junit)
+    testImplementation("org.apache.pdfbox:pdfbox:3.0.4")
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.compose.ui.test.junit4)
+    debugImplementation(libs.androidx.compose.ui.tooling)
+    debugImplementation(libs.androidx.compose.ui.test.manifest)
+}

app/proguard-rules.pro

@@ -0,0 +1,40 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
+
+# Игнорировать отсутствие класса декодера JP2 в PdfBox-Android
+-dontwarn com.gemalto.jp2.JP2Decoder
+# На всякий случай, если PdfBox ссылается на другие отсутствующие библиотеки (например, ICU для текста)
+-dontwarn com.tom_roush.pdfbox.**
+
+# Запретить R8 удалять и переименовывать внутренности PdfBox-Android
+-keep class com.tom_roush.pdfbox.** { *; }
+-keep interface com.tom_roush.pdfbox.** { *; }
+
+# Moshi удаляется proguard
+-keepnames @com.squareup.moshi.JsonClass class *
+-keep class **JsonAdapter {
+    public <init>(...);
+    <fields>;
+}
+-keepclassmembers @com.squareup.moshi.JsonClass class * {
+    synthetic <init>(...);
+}

app/schemas/agzam.vyatsu.data.local.AppDatabase/2.json

@@ -0,0 +1,381 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 2,
+    "identityHash": "48411ce0f1f22ef1dccd5852a9e97c5d",
+    "entities": [
+      {
+        "tableName": "groups",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` TEXT NOT NULL, `name` TEXT NOT NULL, `faculty` TEXT NOT NULL, `autumnFirst` INTEGER, `autumnSecond` INTEGER, `springFirst` INTEGER, `springSecond` INTEGER, `lastSyncedAt` INTEGER NOT NULL, PRIMARY KEY(`id`))",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "faculty",
+            "columnName": "faculty",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "autumnFirst",
+            "columnName": "autumnFirst",
+            "affinity": "INTEGER"
+          },
+          {
+            "fieldPath": "autumnSecond",
+            "columnName": "autumnSecond",
+            "affinity": "INTEGER"
+          },
+          {
+            "fieldPath": "springFirst",
+            "columnName": "springFirst",
+            "affinity": "INTEGER"
+          },
+          {
+            "fieldPath": "springSecond",
+            "columnName": "springSecond",
+            "affinity": "INTEGER"
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "id"
+          ]
+        }
+      },
+      {
+        "tableName": "schedules",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `groupId` TEXT NOT NULL, `season` TEXT NOT NULL, `weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, `lastSyncedAt` INTEGER NOT NULL, FOREIGN KEY(`groupId`) REFERENCES `groups`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "groupId",
+            "columnName": "groupId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "season",
+            "columnName": "season",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekStart",
+            "columnName": "weekStart",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekEnd",
+            "columnName": "weekEnd",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_schedules_groupId",
+            "unique": false,
+            "columnNames": [
+              "groupId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_schedules_groupId` ON `${TABLE_NAME}` (`groupId`)"
+          },
+          {
+            "name": "index_schedules_groupId_season_weekStart",
+            "unique": true,
+            "columnNames": [
+              "groupId",
+              "season",
+              "weekStart"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_schedules_groupId_season_weekStart` ON `${TABLE_NAME}` (`groupId`, `season`, `weekStart`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "groups",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "groupId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "days",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `scheduleId` INTEGER NOT NULL, `date` INTEGER NOT NULL, FOREIGN KEY(`scheduleId`) REFERENCES `schedules`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "scheduleId",
+            "columnName": "scheduleId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_days_scheduleId",
+            "unique": false,
+            "columnNames": [
+              "scheduleId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_days_scheduleId` ON `${TABLE_NAME}` (`scheduleId`)"
+          },
+          {
+            "name": "index_days_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_days_date` ON `${TABLE_NAME}` (`date`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "schedules",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "scheduleId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "lessons",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `dayId` INTEGER NOT NULL, `date` INTEGER NOT NULL, `slotIndex` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `lessonIndex` INTEGER NOT NULL, `raw` TEXT NOT NULL, `room` TEXT, `groupName` TEXT, `subgroup` TEXT, `subject` TEXT, `type` TEXT NOT NULL, `teacher` TEXT, FOREIGN KEY(`dayId`) REFERENCES `days`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "dayId",
+            "columnName": "dayId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "slotIndex",
+            "columnName": "slotIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lessonIndex",
+            "columnName": "lessonIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "raw",
+            "columnName": "raw",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "groupName",
+            "columnName": "groupName",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subgroup",
+            "columnName": "subgroup",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT"
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_lessons_dayId",
+            "unique": false,
+            "columnNames": [
+              "dayId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_dayId` ON `${TABLE_NAME}` (`dayId`)"
+          },
+          {
+            "name": "index_lessons_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_date` ON `${TABLE_NAME}` (`date`)"
+          },
+          {
+            "name": "index_lessons_subject",
+            "unique": false,
+            "columnNames": [
+              "subject"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_subject` ON `${TABLE_NAME}` (`subject`)"
+          },
+          {
+            "name": "index_lessons_room",
+            "unique": false,
+            "columnNames": [
+              "room"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_room` ON `${TABLE_NAME}` (`room`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "days",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "dayId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "preferences",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`key` TEXT NOT NULL, `value` TEXT NOT NULL, PRIMARY KEY(`key`))",
+        "fields": [
+          {
+            "fieldPath": "key",
+            "columnName": "key",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "key"
+          ]
+        }
+      }
+    ],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '48411ce0f1f22ef1dccd5852a9e97c5d')"
+    ]
+  }
+}

app/schemas/agzam.vyatsu.data.local.AppDatabase/3.json

@@ -0,0 +1,427 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 3,
+    "identityHash": "3fd5eda9ac5e29fc96371ecf246e437c",
+    "entities": [
+      {
+        "tableName": "groups",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` TEXT NOT NULL, `name` TEXT NOT NULL, `faculty` TEXT NOT NULL, `lastSyncedAt` INTEGER NOT NULL, PRIMARY KEY(`id`))",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "faculty",
+            "columnName": "faculty",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "id"
+          ]
+        }
+      },
+      {
+        "tableName": "group_periods",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `groupId` TEXT NOT NULL, `season` TEXT NOT NULL, `weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, FOREIGN KEY(`groupId`) REFERENCES `groups`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "groupId",
+            "columnName": "groupId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "season",
+            "columnName": "season",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekStart",
+            "columnName": "weekStart",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekEnd",
+            "columnName": "weekEnd",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_group_periods_groupId",
+            "unique": false,
+            "columnNames": [
+              "groupId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_group_periods_groupId` ON `${TABLE_NAME}` (`groupId`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "groups",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "groupId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "schedules",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `groupId` TEXT NOT NULL, `season` TEXT NOT NULL, `weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, `lastSyncedAt` INTEGER NOT NULL, FOREIGN KEY(`groupId`) REFERENCES `groups`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "groupId",
+            "columnName": "groupId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "season",
+            "columnName": "season",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekStart",
+            "columnName": "weekStart",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekEnd",
+            "columnName": "weekEnd",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_schedules_groupId",
+            "unique": false,
+            "columnNames": [
+              "groupId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_schedules_groupId` ON `${TABLE_NAME}` (`groupId`)"
+          },
+          {
+            "name": "index_schedules_groupId_season_weekStart",
+            "unique": true,
+            "columnNames": [
+              "groupId",
+              "season",
+              "weekStart"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_schedules_groupId_season_weekStart` ON `${TABLE_NAME}` (`groupId`, `season`, `weekStart`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "groups",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "groupId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "days",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `scheduleId` INTEGER NOT NULL, `date` INTEGER NOT NULL, FOREIGN KEY(`scheduleId`) REFERENCES `schedules`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "scheduleId",
+            "columnName": "scheduleId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_days_scheduleId",
+            "unique": false,
+            "columnNames": [
+              "scheduleId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_days_scheduleId` ON `${TABLE_NAME}` (`scheduleId`)"
+          },
+          {
+            "name": "index_days_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_days_date` ON `${TABLE_NAME}` (`date`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "schedules",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "scheduleId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "lessons",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `dayId` INTEGER NOT NULL, `date` INTEGER NOT NULL, `slotIndex` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `lessonIndex` INTEGER NOT NULL, `raw` TEXT NOT NULL, `room` TEXT, `groupName` TEXT, `subgroup` TEXT, `subject` TEXT, `type` TEXT NOT NULL, `teacher` TEXT, FOREIGN KEY(`dayId`) REFERENCES `days`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "dayId",
+            "columnName": "dayId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "slotIndex",
+            "columnName": "slotIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lessonIndex",
+            "columnName": "lessonIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "raw",
+            "columnName": "raw",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "groupName",
+            "columnName": "groupName",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subgroup",
+            "columnName": "subgroup",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT"
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_lessons_dayId",
+            "unique": false,
+            "columnNames": [
+              "dayId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_dayId` ON `${TABLE_NAME}` (`dayId`)"
+          },
+          {
+            "name": "index_lessons_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_date` ON `${TABLE_NAME}` (`date`)"
+          },
+          {
+            "name": "index_lessons_subject",
+            "unique": false,
+            "columnNames": [
+              "subject"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_subject` ON `${TABLE_NAME}` (`subject`)"
+          },
+          {
+            "name": "index_lessons_room",
+            "unique": false,
+            "columnNames": [
+              "room"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_room` ON `${TABLE_NAME}` (`room`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "days",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "dayId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "preferences",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`key` TEXT NOT NULL, `value` TEXT NOT NULL, PRIMARY KEY(`key`))",
+        "fields": [
+          {
+            "fieldPath": "key",
+            "columnName": "key",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "key"
+          ]
+        }
+      }
+    ],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '3fd5eda9ac5e29fc96371ecf246e437c')"
+    ]
+  }
+}

app/schemas/agzam.vyatsu.data.local.AppDatabase/4.json

@@ -0,0 +1,818 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 4,
+    "identityHash": "38abab3f8c5b39625b6a4de9d58968ca",
+    "entities": [
+      {
+        "tableName": "groups",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` TEXT NOT NULL, `name` TEXT NOT NULL, `faculty` TEXT NOT NULL, `lastSyncedAt` INTEGER NOT NULL, PRIMARY KEY(`id`))",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "faculty",
+            "columnName": "faculty",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "id"
+          ]
+        }
+      },
+      {
+        "tableName": "group_periods",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `groupId` TEXT NOT NULL, `season` TEXT NOT NULL, `weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, FOREIGN KEY(`groupId`) REFERENCES `groups`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "groupId",
+            "columnName": "groupId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "season",
+            "columnName": "season",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekStart",
+            "columnName": "weekStart",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekEnd",
+            "columnName": "weekEnd",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_group_periods_groupId",
+            "unique": false,
+            "columnNames": [
+              "groupId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_group_periods_groupId` ON `${TABLE_NAME}` (`groupId`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "groups",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "groupId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "schedules",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `groupId` TEXT NOT NULL, `season` TEXT NOT NULL, `weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, `lastSyncedAt` INTEGER NOT NULL, FOREIGN KEY(`groupId`) REFERENCES `groups`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "groupId",
+            "columnName": "groupId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "season",
+            "columnName": "season",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekStart",
+            "columnName": "weekStart",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekEnd",
+            "columnName": "weekEnd",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_schedules_groupId",
+            "unique": false,
+            "columnNames": [
+              "groupId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_schedules_groupId` ON `${TABLE_NAME}` (`groupId`)"
+          },
+          {
+            "name": "index_schedules_groupId_season_weekStart",
+            "unique": true,
+            "columnNames": [
+              "groupId",
+              "season",
+              "weekStart"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_schedules_groupId_season_weekStart` ON `${TABLE_NAME}` (`groupId`, `season`, `weekStart`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "groups",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "groupId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "days",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `scheduleId` INTEGER NOT NULL, `date` INTEGER NOT NULL, FOREIGN KEY(`scheduleId`) REFERENCES `schedules`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "scheduleId",
+            "columnName": "scheduleId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_days_scheduleId",
+            "unique": false,
+            "columnNames": [
+              "scheduleId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_days_scheduleId` ON `${TABLE_NAME}` (`scheduleId`)"
+          },
+          {
+            "name": "index_days_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_days_date` ON `${TABLE_NAME}` (`date`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "schedules",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "scheduleId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "lessons",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `dayId` INTEGER NOT NULL, `date` INTEGER NOT NULL, `slotIndex` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `lessonIndex` INTEGER NOT NULL, `raw` TEXT NOT NULL, `room` TEXT, `groupName` TEXT, `subgroup` TEXT, `subject` TEXT, `type` TEXT NOT NULL, `teacher` TEXT, FOREIGN KEY(`dayId`) REFERENCES `days`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "dayId",
+            "columnName": "dayId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "slotIndex",
+            "columnName": "slotIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lessonIndex",
+            "columnName": "lessonIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "raw",
+            "columnName": "raw",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "groupName",
+            "columnName": "groupName",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subgroup",
+            "columnName": "subgroup",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT"
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_lessons_dayId",
+            "unique": false,
+            "columnNames": [
+              "dayId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_dayId` ON `${TABLE_NAME}` (`dayId`)"
+          },
+          {
+            "name": "index_lessons_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_date` ON `${TABLE_NAME}` (`date`)"
+          },
+          {
+            "name": "index_lessons_subject",
+            "unique": false,
+            "columnNames": [
+              "subject"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_subject` ON `${TABLE_NAME}` (`subject`)"
+          },
+          {
+            "name": "index_lessons_room",
+            "unique": false,
+            "columnNames": [
+              "room"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_room` ON `${TABLE_NAME}` (`room`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "days",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "dayId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "preferences",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`key` TEXT NOT NULL, `value` TEXT NOT NULL, PRIMARY KEY(`key`))",
+        "fields": [
+          {
+            "fieldPath": "key",
+            "columnName": "key",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "key"
+          ]
+        }
+      },
+      {
+        "tableName": "departments",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`departmentId` TEXT NOT NULL, `name` TEXT NOT NULL, `faculty` TEXT NOT NULL, `lastSyncedAt` INTEGER NOT NULL, PRIMARY KEY(`departmentId`))",
+        "fields": [
+          {
+            "fieldPath": "departmentId",
+            "columnName": "departmentId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "faculty",
+            "columnName": "faculty",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "departmentId"
+          ]
+        }
+      },
+      {
+        "tableName": "department_periods",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `departmentId` TEXT NOT NULL, `season` TEXT NOT NULL, `weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, FOREIGN KEY(`departmentId`) REFERENCES `departments`(`departmentId`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "departmentId",
+            "columnName": "departmentId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "season",
+            "columnName": "season",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekStart",
+            "columnName": "weekStart",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekEnd",
+            "columnName": "weekEnd",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_department_periods_departmentId",
+            "unique": false,
+            "columnNames": [
+              "departmentId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_department_periods_departmentId` ON `${TABLE_NAME}` (`departmentId`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "departments",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "departmentId"
+            ],
+            "referencedColumns": [
+              "departmentId"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "teacher_schedules",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `departmentId` TEXT NOT NULL, `season` TEXT NOT NULL, `weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, `lastSyncedAt` INTEGER NOT NULL, FOREIGN KEY(`departmentId`) REFERENCES `departments`(`departmentId`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "departmentId",
+            "columnName": "departmentId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "season",
+            "columnName": "season",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekStart",
+            "columnName": "weekStart",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekEnd",
+            "columnName": "weekEnd",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_teacher_schedules_departmentId",
+            "unique": false,
+            "columnNames": [
+              "departmentId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_teacher_schedules_departmentId` ON `${TABLE_NAME}` (`departmentId`)"
+          },
+          {
+            "name": "index_teacher_schedules_departmentId_season_weekStart",
+            "unique": true,
+            "columnNames": [
+              "departmentId",
+              "season",
+              "weekStart"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_teacher_schedules_departmentId_season_weekStart` ON `${TABLE_NAME}` (`departmentId`, `season`, `weekStart`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "departments",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "departmentId"
+            ],
+            "referencedColumns": [
+              "departmentId"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "teacher_days",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `scheduleId` INTEGER NOT NULL, `date` INTEGER NOT NULL, FOREIGN KEY(`scheduleId`) REFERENCES `teacher_schedules`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "scheduleId",
+            "columnName": "scheduleId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_teacher_days_scheduleId",
+            "unique": false,
+            "columnNames": [
+              "scheduleId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_teacher_days_scheduleId` ON `${TABLE_NAME}` (`scheduleId`)"
+          },
+          {
+            "name": "index_teacher_days_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_teacher_days_date` ON `${TABLE_NAME}` (`date`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "teacher_schedules",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "scheduleId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "teacher_lessons",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `dayId` INTEGER NOT NULL, `date` INTEGER NOT NULL, `slotIndex` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `lessonIndex` INTEGER NOT NULL, `raw` TEXT NOT NULL, `room` TEXT, `groupName` TEXT, `subgroup` TEXT, `subject` TEXT, `type` TEXT NOT NULL, `teacher` TEXT NOT NULL, FOREIGN KEY(`dayId`) REFERENCES `teacher_days`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "dayId",
+            "columnName": "dayId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "slotIndex",
+            "columnName": "slotIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lessonIndex",
+            "columnName": "lessonIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "raw",
+            "columnName": "raw",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "groupName",
+            "columnName": "groupName",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subgroup",
+            "columnName": "subgroup",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_teacher_lessons_dayId",
+            "unique": false,
+            "columnNames": [
+              "dayId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_teacher_lessons_dayId` ON `${TABLE_NAME}` (`dayId`)"
+          },
+          {
+            "name": "index_teacher_lessons_teacher",
+            "unique": false,
+            "columnNames": [
+              "teacher"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_teacher_lessons_teacher` ON `${TABLE_NAME}` (`teacher`)"
+          },
+          {
+            "name": "index_teacher_lessons_room",
+            "unique": false,
+            "columnNames": [
+              "room"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_teacher_lessons_room` ON `${TABLE_NAME}` (`room`)"
+          },
+          {
+            "name": "index_teacher_lessons_subject",
+            "unique": false,
+            "columnNames": [
+              "subject"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_teacher_lessons_subject` ON `${TABLE_NAME}` (`subject`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "teacher_days",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "dayId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      }
+    ],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '38abab3f8c5b39625b6a4de9d58968ca')"
+    ]
+  }
+}

app/src/androidTest/java/agzam/vyatsu/ExampleInstrumentedTest.kt

@@ -0,0 +1,24 @@
+package agzam.vyatsu
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("agzam.vyatsu", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
+
+    <application
+        android:name=".VyatsuApplication"
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@drawable/icon"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.VyatsuSchedule">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.VyatsuSchedule">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
+    </application>
+
+</manifest>

app/src/main/java/agzam/vyatsu/AppRoot.kt

@@ -0,0 +1,90 @@
+package agzam.vyatsu
+
+import agzam.vyatsu.di.AppContainer
+import agzam.vyatsu.ui.home.HomeScreen
+import agzam.vyatsu.ui.picker.PickerScreen
+import agzam.vyatsu.ui.picker.PickerViewModel
+import agzam.vyatsu.ui.schedule.ScheduleViewModel
+import agzam.vyatsu.ui.settings.UpdateViewModel
+import agzam.vyatsu.ui.teacher.TeacherScheduleViewModel
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.platform.LocalContext
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewmodel.compose.viewModel
+
+@Composable
+fun AppRoot() {
+    val app = LocalContext.current.applicationContext as VyatsuApplication
+    val container = app.container
+
+    val scheduleViewModel: ScheduleViewModel = viewModel(factory = scheduleFactory(container))
+    val teacherScheduleViewModel: TeacherScheduleViewModel = viewModel(factory = teacherScheduleFactory(container))
+    val updateViewModel: UpdateViewModel = viewModel(factory = updateFactory(container))
+
+    val state by scheduleViewModel.uiState.collectAsState()
+    val teacherState by teacherScheduleViewModel.uiState.collectAsState()
+    val showFirstRunDialog by updateViewModel.showFirstRunDialog.collectAsState()
+
+    if (showFirstRunDialog) {
+        AlertDialog(
+            onDismissRequest = { updateViewModel.onFirstRunDecision(false) },
+            title = { Text("Автоматические обновления") },
+            text = {
+                Text(
+                    "Разрешить автоматически проверять и устанавливать " +
+                        "новые версии приложения?"
+                )
+            },
+            confirmButton = {
+                TextButton(onClick = { updateViewModel.onFirstRunDecision(true) }) {
+                    Text("Разрешить")
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { updateViewModel.onFirstRunDecision(false) }) {
+                    Text("Не надо")
+                }
+            }
+        )
+    }
+
+    if (state.noGroup && teacherState.noTeacher) {
+        val pickerViewModel: PickerViewModel = viewModel(factory = pickerFactory(container))
+        PickerScreen(
+            viewModel = pickerViewModel,
+            onGroupPicked = { group -> scheduleViewModel.selectGroup(group.id) },
+            onTeacherPicked = { teacher -> teacherScheduleViewModel.selectTeacher(teacher.name) }
+        )
+        return
+    }
+    HomeScreen(
+        scheduleViewModel = scheduleViewModel,
+        teacherScheduleViewModel = teacherScheduleViewModel,
+        updateViewModel = updateViewModel,
+        onSwitchGroup = { scheduleViewModel.switchGroup() },
+        onSwitchTeacher = { teacherScheduleViewModel.switchTeacher() }
+    )
+}
+
+private class SimpleFactory<T : ViewModel>(private val create: () -> T) : ViewModelProvider.Factory {
+    @Suppress("UNCHECKED_CAST")
+    override fun <T : ViewModel> create(modelClass: Class<T>): T = create() as T
+}
+
+private fun scheduleFactory(c: AppContainer): ViewModelProvider.Factory = SimpleFactory { ScheduleViewModel(c.scheduleRepository, c.preferencesRepository, c.groupRepository) }
+private fun teacherScheduleFactory(c: AppContainer): ViewModelProvider.Factory = SimpleFactory { TeacherScheduleViewModel(c.teacherScheduleRepository, c.preferencesRepository) }
+private fun pickerFactory(c: AppContainer): ViewModelProvider.Factory = SimpleFactory {
+    PickerViewModel(
+        c.groupRepository,
+        c.teacherRepository,
+        c.teacherScheduleRepository,
+        c.preferencesRepository
+    )
+}
+private fun updateFactory(c: AppContainer): ViewModelProvider.Factory = SimpleFactory { UpdateViewModel(c.appUpdater, c.preferencesRepository) }

app/src/main/java/agzam/vyatsu/MainActivity.kt

@@ -0,0 +1,21 @@
+package agzam.vyatsu
+
+import agzam.vyatsu.ui.theme.VyatsuScheduleTheme
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        val container = (application as VyatsuApplication).container
+        container.appUpdater.autoCheckAndInstall()
+        setContent {
+            VyatsuScheduleTheme {
+                AppRoot()
+            }
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/VyatsuApplication.kt

@@ -0,0 +1,16 @@
+package agzam.vyatsu
+
+import agzam.vyatsu.di.AppContainer
+import android.app.Application
+import com.tom_roush.pdfbox.android.PDFBoxResourceLoader
+
+class VyatsuApplication : Application() {
+    lateinit var container: AppContainer
+        private set
+
+    override fun onCreate() {
+        super.onCreate()
+        PDFBoxResourceLoader.init(this)
+        container = AppContainer(this)
+    }
+}

app/src/main/java/agzam/vyatsu/data/local/AppDatabase.kt

@@ -0,0 +1,118 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+import androidx.room.TypeConverters
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+@Database(
+    entities = [
+        GroupEntity::class,
+        GroupPeriodEntity::class,
+        ScheduleEntity::class,
+        DayEntity::class,
+        LessonEntity::class,
+        PreferenceEntity::class,
+        DepartmentEntity::class,
+        DepartmentPeriodEntity::class,
+        TeacherScheduleEntity::class,
+        TeacherDayEntity::class,
+        TeacherLessonEntity::class
+    ],
+    version = 4,
+    exportSchema = true
+)
+@TypeConverters(Converters::class)
+abstract class AppDatabase : RoomDatabase() {
+    abstract fun groupDao(): GroupDao
+    abstract fun scheduleDao(): ScheduleDao
+    abstract fun preferencesDao(): PreferencesDao
+    abstract fun teacherDao(): TeacherDao
+    abstract fun teacherScheduleDao(): TeacherScheduleDao
+
+    companion object {
+        val MIGRATION_3_4 = object : Migration(3, 4) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL(
+                    "CREATE TABLE IF NOT EXISTS `departments` (" +
+                        "`departmentId` TEXT NOT NULL, `name` TEXT NOT NULL, " +
+                        "`faculty` TEXT NOT NULL, `lastSyncedAt` INTEGER NOT NULL, " +
+                        "PRIMARY KEY(`departmentId`))"
+                )
+                db.execSQL(
+                    "CREATE TABLE IF NOT EXISTS `department_periods` (" +
+                        "`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, " +
+                        "`departmentId` TEXT NOT NULL, `season` TEXT NOT NULL, " +
+                        "`weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, " +
+                        "FOREIGN KEY(`departmentId`) REFERENCES `departments`(`departmentId`) " +
+                        "ON UPDATE NO ACTION ON DELETE CASCADE )"
+                )
+                db.execSQL(
+                    "CREATE INDEX IF NOT EXISTS `index_department_periods_departmentId` " +
+                        "ON `department_periods` (`departmentId`)"
+                )
+                db.execSQL(
+                    "CREATE TABLE IF NOT EXISTS `teacher_schedules` (" +
+                        "`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, " +
+                        "`departmentId` TEXT NOT NULL, `season` TEXT NOT NULL, " +
+                        "`weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, " +
+                        "`lastSyncedAt` INTEGER NOT NULL, " +
+                        "FOREIGN KEY(`departmentId`) REFERENCES `departments`(`departmentId`) " +
+                        "ON UPDATE NO ACTION ON DELETE CASCADE )"
+                )
+                db.execSQL(
+                    "CREATE INDEX IF NOT EXISTS `index_teacher_schedules_departmentId` " +
+                        "ON `teacher_schedules` (`departmentId`)"
+                )
+                db.execSQL(
+                    "CREATE UNIQUE INDEX IF NOT EXISTS `index_teacher_schedules_departmentId_season_weekStart` " +
+                        "ON `teacher_schedules` (`departmentId`, `season`, `weekStart`)"
+                )
+                db.execSQL(
+                    "CREATE TABLE IF NOT EXISTS `teacher_days` (" +
+                        "`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, " +
+                        "`scheduleId` INTEGER NOT NULL, `date` INTEGER NOT NULL, " +
+                        "FOREIGN KEY(`scheduleId`) REFERENCES `teacher_schedules`(`id`) " +
+                        "ON UPDATE NO ACTION ON DELETE CASCADE )"
+                )
+                db.execSQL(
+                    "CREATE INDEX IF NOT EXISTS `index_teacher_days_scheduleId` " +
+                        "ON `teacher_days` (`scheduleId`)"
+                )
+                db.execSQL(
+                    "CREATE INDEX IF NOT EXISTS `index_teacher_days_date` " +
+                        "ON `teacher_days` (`date`)"
+                )
+                db.execSQL(
+                    "CREATE TABLE IF NOT EXISTS `teacher_lessons` (" +
+                        "`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, " +
+                        "`dayId` INTEGER NOT NULL, `date` INTEGER NOT NULL, " +
+                        "`slotIndex` INTEGER NOT NULL, `start` INTEGER NOT NULL, " +
+                        "`end` INTEGER NOT NULL, `lessonIndex` INTEGER NOT NULL, " +
+                        "`raw` TEXT NOT NULL, `room` TEXT, `groupName` TEXT, " +
+                        "`subgroup` TEXT, `subject` TEXT, `type` TEXT NOT NULL, " +
+                        "`teacher` TEXT NOT NULL, " +
+                        "FOREIGN KEY(`dayId`) REFERENCES `teacher_days`(`id`) " +
+                        "ON UPDATE NO ACTION ON DELETE CASCADE )"
+                )
+                db.execSQL(
+                    "CREATE INDEX IF NOT EXISTS `index_teacher_lessons_dayId` " +
+                        "ON `teacher_lessons` (`dayId`)"
+                )
+                db.execSQL(
+                    "CREATE INDEX IF NOT EXISTS `index_teacher_lessons_teacher` " +
+                        "ON `teacher_lessons` (`teacher`)"
+                )
+                db.execSQL(
+                    "CREATE INDEX IF NOT EXISTS `index_teacher_lessons_room` " +
+                        "ON `teacher_lessons` (`room`)"
+                )
+                db.execSQL(
+                    "CREATE INDEX IF NOT EXISTS `index_teacher_lessons_subject` " +
+                        "ON `teacher_lessons` (`subject`)"
+                )
+            }
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/data/local/Converters.kt

@@ -0,0 +1,29 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.LessonType
+import androidx.room.TypeConverter
+import java.time.LocalDate
+import java.time.LocalTime
+
+class Converters {
+
+    @TypeConverter
+    fun localDateToEpochDay(date: LocalDate?): Long? = date?.toEpochDay()
+
+    @TypeConverter
+    fun epochDayToLocalDate(epochDay: Long?): LocalDate? = epochDay?.let(LocalDate::ofEpochDay)
+
+    @TypeConverter
+    fun localTimeToMinutes(time: LocalTime?): Int? = time?.let { it.hour * 60 + it.minute }
+
+    @TypeConverter
+    fun minutesToLocalTime(minutes: Int?): LocalTime? =
+        minutes?.let { LocalTime.of(it / 60, it % 60) }
+
+    @TypeConverter
+    fun lessonTypeToString(type: LessonType): String = type.name
+
+    @TypeConverter
+    fun stringToLessonType(value: String): LessonType =
+        runCatching { LessonType.valueOf(value) }.getOrDefault(LessonType.OTHER)
+}

app/src/main/java/agzam/vyatsu/data/local/DayEntity.kt

@@ -0,0 +1,27 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "days",
+    foreignKeys = [
+        ForeignKey(
+            entity = ScheduleEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["scheduleId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("scheduleId"),
+        Index("date")
+    ]
+)
+data class DayEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val scheduleId: Long,
+    val date: Long
+)

app/src/main/java/agzam/vyatsu/data/local/DepartmentEntity.kt

@@ -0,0 +1,12 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "departments")
+data class DepartmentEntity(
+    @PrimaryKey val departmentId: String,
+    val name: String,
+    val faculty: String,
+    val lastSyncedAt: Long
+)

app/src/main/java/agzam/vyatsu/data/local/DepartmentPeriodEntity.kt

@@ -0,0 +1,28 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.Season
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+// Все опубликованные на сайте 2-недельные периоды кафедры, включая ещё не начавшиеся.
+@Entity(
+    tableName = "department_periods",
+    foreignKeys = [
+        ForeignKey(
+            entity = DepartmentEntity::class,
+            parentColumns = ["departmentId"],
+            childColumns = ["departmentId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [Index("departmentId")]
+)
+data class DepartmentPeriodEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val departmentId: String,
+    val season: Season,
+    val weekStart: Long,
+    val weekEnd: Long
+)

app/src/main/java/agzam/vyatsu/data/local/GroupDao.kt

@@ -0,0 +1,37 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface GroupDao {
+    @Query("SELECT * FROM groups ORDER BY name")
+    fun observeAll(): Flow<List<GroupEntity>>
+
+    @Query("SELECT * FROM groups WHERE id = :id")
+    suspend fun getById(id: String): GroupEntity?
+
+    @Query("SELECT * FROM groups WHERE faculty = :faculty ORDER BY name")
+    suspend fun getByFaculty(faculty: String): List<GroupEntity>
+
+    @Query("SELECT DISTINCT faculty FROM groups ORDER BY faculty")
+    suspend fun getFaculties(): List<String>
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertAll(groups: List<GroupEntity>)
+
+    @Query("SELECT MAX(lastSyncedAt) FROM groups")
+    suspend fun maxSyncedAt(): Long?
+
+    @Query("SELECT * FROM group_periods WHERE groupId = :groupId AND weekEnd >= :fromEpochDay ORDER BY weekStart")
+    suspend fun getCurrentAndFuturePeriods(groupId: String, fromEpochDay: Long): List<GroupPeriodEntity>
+
+    @Query("DELETE FROM group_periods")
+    suspend fun deleteAllPeriods()
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertPeriods(periods: List<GroupPeriodEntity>)
+}

app/src/main/java/agzam/vyatsu/data/local/GroupEntity.kt

@@ -0,0 +1,12 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "groups")
+data class GroupEntity(
+    @PrimaryKey val id: String,
+    val name: String,
+    val faculty: String,
+    val lastSyncedAt: Long
+)

app/src/main/java/agzam/vyatsu/data/local/GroupPeriodEntity.kt

@@ -0,0 +1,28 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.Season
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+// Все опубликованные на сайте 2-недельные периоды группы, включая ещё не начавшиеся.
+@Entity(
+    tableName = "group_periods",
+    foreignKeys = [
+        ForeignKey(
+            entity = GroupEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["groupId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [Index("groupId")]
+)
+data class GroupPeriodEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val groupId: String,
+    val season: Season,
+    val weekStart: Long,
+    val weekEnd: Long
+)

app/src/main/java/agzam/vyatsu/data/local/LessonEntity.kt

@@ -0,0 +1,41 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.LessonType
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "lessons",
+    foreignKeys = [
+        ForeignKey(
+            entity = DayEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["dayId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("dayId"),
+        Index("date"),
+        Index("subject"),
+        Index("room")
+    ]
+)
+data class LessonEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val dayId: Long,
+    val date: Long,
+    val slotIndex: Int,
+    val start: Int,
+    val end: Int,
+    val lessonIndex: Int,
+    val raw: String,
+    val room: String?,
+    val groupName: String?,
+    val subgroup: String?,
+    val subject: String?,
+    val type: LessonType,
+    val teacher: String?
+)

app/src/main/java/agzam/vyatsu/data/local/PreferenceEntity.kt

@@ -0,0 +1,10 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "preferences")
+data class PreferenceEntity(
+    @PrimaryKey val key: String,
+    val value: String
+)

app/src/main/java/agzam/vyatsu/data/local/PreferencesDao.kt

@@ -0,0 +1,72 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Dao
+import androidx.room.Query
+
+@Dao
+interface PreferencesDao {
+    @Query("SELECT value FROM preferences WHERE key = 'selectedGroupId'")
+    suspend fun selectedGroupId(): String?
+
+    @Query(
+        "INSERT OR REPLACE INTO preferences(key, value) VALUES('selectedGroupId', :groupId)"
+    )
+    suspend fun setSelectedGroup(groupId: String)
+
+    @Query("DELETE FROM preferences WHERE key = 'selectedGroupId'")
+    suspend fun clearSelectedGroup()
+
+    @Query("SELECT value FROM preferences WHERE key = 'selectedWeekStart'")
+    suspend fun selectedWeekStart(): String?
+
+    @Query("INSERT OR REPLACE INTO preferences(key, value) VALUES('selectedWeekStart', :weekStart)")
+    suspend fun setSelectedWeekStart(weekStart: String)
+
+    @Query("SELECT value FROM preferences WHERE key = 'selectedDayDate'")
+    suspend fun selectedDayDate(): String?
+
+    @Query("INSERT OR REPLACE INTO preferences(key, value) VALUES('selectedDayDate', :date)")
+    suspend fun setSelectedDayDate(date: String)
+
+    @Query("SELECT value FROM preferences WHERE key = 'selectedTeacherId'")
+    suspend fun selectedTeacherId(): String?
+
+    @Query(
+        "INSERT OR REPLACE INTO preferences(key, value) VALUES('selectedTeacherId', :teacherId)"
+    )
+    suspend fun setSelectedTeacherId(teacherId: String)
+
+    @Query("SELECT value FROM preferences WHERE key = 'selectedTeacherWeekStart'")
+    suspend fun selectedTeacherWeekStart(): String?
+
+    @Query(
+        "INSERT OR REPLACE INTO preferences(key, value) VALUES('selectedTeacherWeekStart', :weekStart)"
+    )
+    suspend fun setSelectedTeacherWeekStart(weekStart: String)
+
+    @Query("SELECT value FROM preferences WHERE key = 'selectedTeacherDayDate'")
+    suspend fun selectedTeacherDayDate(): String?
+
+    @Query(
+        "INSERT OR REPLACE INTO preferences(key, value) VALUES('selectedTeacherDayDate', :date)"
+    )
+    suspend fun setSelectedTeacherDayDate(date: String)
+
+    @Query(
+        "DELETE FROM preferences WHERE key IN " +
+            "('selectedTeacherId', 'selectedTeacherWeekStart', 'selectedTeacherDayDate')"
+    )
+    suspend fun clearSelectedTeacher()
+
+    @Query("SELECT value FROM preferences WHERE key = 'autoUpdateEnabled'")
+    suspend fun autoUpdateEnabled(): String?
+
+    @Query("INSERT OR REPLACE INTO preferences(key, value) VALUES('autoUpdateEnabled', :enabled)")
+    suspend fun setAutoUpdateEnabled(enabled: String)
+
+    @Query("SELECT value FROM preferences WHERE key = 'autoUpdateAsked'")
+    suspend fun autoUpdateAsked(): String?
+
+    @Query("INSERT OR REPLACE INTO preferences(key, value) VALUES('autoUpdateAsked', :asked)")
+    suspend fun setAutoUpdateAsked(asked: String)
+}

app/src/main/java/agzam/vyatsu/data/local/ScheduleDao.kt

@@ -0,0 +1,75 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface ScheduleDao {
+
+    @Query("SELECT * FROM schedules WHERE groupId = :groupId ORDER BY weekStart DESC")
+    fun observeSchedules(groupId: String): Flow<List<ScheduleEntity>>
+
+    @Query("SELECT * FROM schedules WHERE groupId = :groupId ORDER BY weekStart DESC")
+    suspend fun getSchedules(groupId: String): List<ScheduleEntity>
+
+    @Query("DELETE FROM days WHERE scheduleId = :scheduleId")
+    suspend fun deleteDaysForSchedule(scheduleId: Long)
+
+    @Insert(onConflict = OnConflictStrategy.ABORT)
+    suspend fun insertSchedule(schedule: ScheduleEntity): Long
+
+    @Query("DELETE FROM schedules WHERE groupId = :groupId AND season = :season AND weekStart = :weekStart")
+    suspend fun deleteSchedule(groupId: String, season: String, weekStart: Long)
+
+    @Query("DELETE FROM schedules WHERE groupId = :groupId")
+    suspend fun deleteAll(groupId: String)
+
+    @Query(
+        """
+        DELETE FROM schedules
+        WHERE groupId = :groupId
+          AND id NOT IN (
+              SELECT id FROM schedules
+              WHERE groupId = :groupId
+              ORDER BY weekStart DESC
+              LIMIT :keep
+          )
+        """
+    )
+    suspend fun trim(groupId: String, keep: Int)
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertDays(days: List<DayEntity>): List<Long>
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertLessons(lessons: List<LessonEntity>)
+
+    @Query(
+        "SELECT days.* FROM days INNER JOIN schedules ON schedules.id = days.scheduleId " +
+            "WHERE schedules.groupId = :groupId ORDER BY days.date"
+    )
+    suspend fun getDaysForGroup(groupId: String): List<DayEntity>
+
+    @Query(
+        "SELECT lessons.* FROM lessons INNER JOIN days ON days.id = lessons.dayId " +
+            "INNER JOIN schedules ON schedules.id = days.scheduleId " +
+            "WHERE schedules.groupId = :groupId ORDER BY lessons.date, lessons.slotIndex, lessons.lessonIndex"
+    )
+    suspend fun getLessonsForGroup(groupId: String): List<LessonEntity>
+
+    @Query(
+        "SELECT days.* FROM days INNER JOIN schedules ON schedules.id = days.scheduleId " +
+            "WHERE schedules.groupId = :groupId ORDER BY days.date"
+    )
+    fun observeDaysForGroup(groupId: String): Flow<List<DayEntity>>
+
+    @Query(
+        "SELECT lessons.* FROM lessons INNER JOIN days ON days.id = lessons.dayId " +
+            "INNER JOIN schedules ON schedules.id = days.scheduleId " +
+            "WHERE schedules.groupId = :groupId ORDER BY lessons.date, lessons.slotIndex, lessons.lessonIndex"
+    )
+    fun observeLessonsForGroup(groupId: String): Flow<List<LessonEntity>>
+}

app/src/main/java/agzam/vyatsu/data/local/ScheduleEntity.kt

@@ -0,0 +1,31 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.Season
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "schedules",
+    foreignKeys = [
+        ForeignKey(
+            entity = GroupEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["groupId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("groupId"),
+        Index(value = ["groupId", "season", "weekStart"], unique = true)
+    ]
+)
+data class ScheduleEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val groupId: String,
+    val season: Season,
+    val weekStart: Long,
+    val weekEnd: Long,
+    val lastSyncedAt: Long
+)

app/src/main/java/agzam/vyatsu/data/local/TeacherDao.kt

@@ -0,0 +1,39 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface TeacherDao {
+    @Query("SELECT * FROM departments ORDER BY name")
+    fun observeDepartments(): Flow<List<DepartmentEntity>>
+
+    @Query("SELECT * FROM departments WHERE departmentId = :id")
+    suspend fun getDepartment(id: String): DepartmentEntity?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertAll(departments: List<DepartmentEntity>)
+
+    @Query("SELECT MAX(lastSyncedAt) FROM departments")
+    suspend fun maxSyncedAt(): Long?
+
+    @Query("SELECT DISTINCT faculty FROM departments ORDER BY faculty")
+    suspend fun getFaculties(): List<String>
+
+    @Query("DELETE FROM department_periods")
+    suspend fun deleteAllPeriods()
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertPeriods(periods: List<DepartmentPeriodEntity>)
+
+    @Query(
+        "SELECT * FROM department_periods WHERE weekStart <= :epochDay AND weekEnd >= :epochDay ORDER BY departmentId"
+    )
+    suspend fun getPeriodsForDate(epochDay: Long): List<DepartmentPeriodEntity>
+
+    @Query("SELECT * FROM department_periods WHERE departmentId = :departmentId ORDER BY weekStart")
+    suspend fun getPeriodsForDepartment(departmentId: String): List<DepartmentPeriodEntity>
+}

app/src/main/java/agzam/vyatsu/data/local/TeacherDayEntity.kt

@@ -0,0 +1,27 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "teacher_days",
+    foreignKeys = [
+        ForeignKey(
+            entity = TeacherScheduleEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["scheduleId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("scheduleId"),
+        Index("date")
+    ]
+)
+data class TeacherDayEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val scheduleId: Long,
+    val date: Long
+)

app/src/main/java/agzam/vyatsu/data/local/TeacherLessonEntity.kt

@@ -0,0 +1,41 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.LessonType
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "teacher_lessons",
+    foreignKeys = [
+        ForeignKey(
+            entity = TeacherDayEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["dayId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("dayId"),
+        Index("teacher"),
+        Index("room"),
+        Index("subject")
+    ]
+)
+data class TeacherLessonEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val dayId: Long,
+    val date: Long,
+    val slotIndex: Int,
+    val start: Int,
+    val end: Int,
+    val lessonIndex: Int,
+    val raw: String,
+    val room: String?,
+    val groupName: String?,
+    val subgroup: String?,
+    val subject: String?,
+    val type: LessonType,
+    val teacher: String
+)

app/src/main/java/agzam/vyatsu/data/local/TeacherScheduleDao.kt

@@ -0,0 +1,81 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import androidx.room.Transaction
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface TeacherScheduleDao {
+
+    @Query("SELECT * FROM teacher_schedules ORDER BY weekStart DESC")
+    fun observeSchedules(): Flow<List<TeacherScheduleEntity>>
+
+    @Query("SELECT * FROM teacher_schedules ORDER BY weekStart DESC")
+    suspend fun getSchedules(): List<TeacherScheduleEntity>
+
+    @Query("DELETE FROM teacher_days WHERE scheduleId = :scheduleId")
+    suspend fun deleteDaysForSchedule(scheduleId: Long)
+
+    @Insert(onConflict = OnConflictStrategy.ABORT)
+    suspend fun insertSchedule(schedule: TeacherScheduleEntity): Long
+
+    @Query(
+        "DELETE FROM teacher_schedules WHERE departmentId = :departmentId AND season = :season AND weekStart = :weekStart"
+    )
+    suspend fun deleteSchedule(departmentId: String, season: String, weekStart: Long)
+
+    @Query("DELETE FROM teacher_schedules WHERE season = :season AND weekStart = :weekStart")
+    suspend fun deletePeriod(season: String, weekStart: Long)
+
+    @Query("DELETE FROM teacher_schedules")
+    suspend fun deleteAll()
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertDays(days: List<TeacherDayEntity>): List<Long>
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertLessons(lessons: List<TeacherLessonEntity>)
+
+    @Transaction
+    suspend fun replaceSchedule(schedule: TeacherScheduleEntity, days: List<TeacherDayEntity>, lessons: List<TeacherLessonEntity>) {
+        val scheduleId = insertSchedule(schedule)
+        val daysWithScheduleId = days.map { it.copy(scheduleId = scheduleId) }
+        deleteDaysForSchedule(scheduleId)
+        val dayIds = insertDays(daysWithScheduleId)
+        val dayIdByDate = daysWithScheduleId.zip(dayIds).associate { (day, id) -> day.date to id }
+        insertLessons(lessons.map { lesson -> lesson.copy(dayId = dayIdByDate.getValue(lesson.date)) })
+    }
+
+    @Query(
+        "SELECT teacher_days.* FROM teacher_days INNER JOIN teacher_schedules ON teacher_schedules.id = teacher_days.scheduleId " +
+            "WHERE teacher_schedules.season = :season AND teacher_schedules.weekStart <= :weekStart " +
+            "AND teacher_schedules.weekEnd >= :weekStart ORDER BY teacher_days.date"
+    )
+    fun observeDaysForPeriod(season: String, weekStart: Long): Flow<List<TeacherDayEntity>>
+
+    @Query(
+        "SELECT teacher_lessons.* FROM teacher_lessons INNER JOIN teacher_days ON teacher_days.id = teacher_lessons.dayId " +
+            "INNER JOIN teacher_schedules ON teacher_schedules.id = teacher_days.scheduleId " +
+            "WHERE teacher_schedules.season = :season AND teacher_schedules.weekStart <= :weekStart " +
+            "AND teacher_schedules.weekEnd >= :weekStart " +
+            "ORDER BY teacher_lessons.date, teacher_lessons.slotIndex, teacher_lessons.lessonIndex"
+    )
+    fun observeLessonsForPeriod(season: String, weekStart: Long): Flow<List<TeacherLessonEntity>>
+
+    @Query(
+        "SELECT DISTINCT teacher FROM teacher_lessons INNER JOIN teacher_days ON teacher_days.id = teacher_lessons.dayId " +
+            "INNER JOIN teacher_schedules ON teacher_schedules.id = teacher_days.scheduleId " +
+            "WHERE teacher_schedules.season = :season AND teacher_schedules.weekStart <= :weekStart " +
+            "AND teacher_schedules.weekEnd >= :weekStart ORDER BY teacher"
+    )
+    fun observeDistinctTeachers(season: String, weekStart: Long): Flow<List<String>>
+
+    @Query(
+        "SELECT EXISTS(SELECT 1 FROM teacher_schedules WHERE season = :season " +
+            "AND weekStart <= :weekStart AND weekEnd >= :weekStart)"
+    )
+    suspend fun hasSchedulesForPeriod(season: String, weekStart: Long): Boolean
+}

app/src/main/java/agzam/vyatsu/data/local/TeacherScheduleEntity.kt

@@ -0,0 +1,31 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.Season
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "teacher_schedules",
+    foreignKeys = [
+        ForeignKey(
+            entity = DepartmentEntity::class,
+            parentColumns = ["departmentId"],
+            childColumns = ["departmentId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("departmentId"),
+        Index(value = ["departmentId", "season", "weekStart"], unique = true)
+    ]
+)
+data class TeacherScheduleEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val departmentId: String,
+    val season: Season,
+    val weekStart: Long,
+    val weekEnd: Long,
+    val lastSyncedAt: Long
+)

app/src/main/java/agzam/vyatsu/data/remote/FacultyNames.kt

@@ -0,0 +1,36 @@
+package agzam.vyatsu.data.remote
+
+/**
+ * Справочник сокращённых названий факультетов ВятГУ.
+ * Вынесен из GroupsParser, так как TeachersParser использует те же сокращения.
+ */
+object FacultyNames {
+
+    private val parenthesized = Regex("""\(.*?\)\s?""")
+
+    private val shorthands = mapOf(
+        "Институт биологии и биотехнологии (факультет)(ОРУ)" to "ИББТ",
+        "Институт химии и экологии (факультет) (ОРУ)" to "ИнХимЭк",
+        "Факультет автоматики и вычислительной техники (ОРУ)" to "ФАВТ",
+        "Факультет истории, политических наук и культурологии (ОРУ)" to "ФИПНК",
+        "Факультет компьютерных и физико-математических наук (ОРУ)" to "ФКФМН",
+        "Факультет лингвистики (ОРУ)" to "ФЛ",
+        "Факультет менеджмента и сервиса (ОРУ)" to "ФМиС",
+        "Факультет педагогики и психологии (ОРУ)" to "ФПП",
+        "Факультет строительства и архитектуры (ОРУ)" to "ФСА",
+        "Факультет технологий, инжиниринга и дизайна (ОРУ)" to "ФТИД",
+        "Факультет физической культуры и спорта (ОРУ)" to "ФФКС",
+        "Факультет филологии и медиакоммуникаций (ОРУ)" to "ФФМ",
+        "Факультет экономики и финансов (ОРУ)" to "ФЭиФ",
+        "Электротехнический факультет (ОРУ)" to "ЭТФ",
+        "Юридический институт (факультет) (ОРУ)" to "ЮИ"
+    )
+
+    fun shortname(name: String): String {
+        val stripped = removeParenthesized(name)
+        val sh = shorthands[name]
+        return if (sh != null) "$sh ($stripped)" else stripped
+    }
+
+    fun removeParenthesized(name: String): String = name.replace(parenthesized, "").trim()
+}

app/src/main/java/agzam/vyatsu/data/remote/GroupsParser.kt

@@ -0,0 +1,157 @@
+package agzam.vyatsu.data.remote
+
+import agzam.vyatsu.domain.model.DateRange
+import agzam.vyatsu.domain.model.Group
+import agzam.vyatsu.domain.model.Season
+import java.io.InputStream
+
+/**
+ * Основано на https://github.com/alirzaev/vyatsu-schedule-backend/blob/master/utils/extractors.py
+ * @author Agzam
+ */
+object GroupsParser {
+
+    private val groupPattern = Regex("""/reports/schedule/Group/(\d{4,})_([12])_(\d{8})_(\d{8})\.pdf""")
+
+    private val grpIdPattern = Regex("""data-grp_period_id="(\d+)"""")
+
+    private const val CHUNK_SIZE = 8192
+    private const val MAX_SLICE = 1 shl 16      // 64 KiB — защита от аномально длинных единиц
+    private const val MAX_PENDING = 1 shl 20    // 1 MiB — жёсткий потолок буфера
+
+    /**
+     * Стриминговый парсер страницы групп: читает тело ответа по чанкам и
+     * разбирает его на лету, не материализуя весь HTML в память.
+     *
+     * Страница весит ~2.6MB, а на устройствах с маленькой кучей даже
+     * одиночный String такого размера — критично (jsoup-DOM и подавно приводил к OOM).
+     * За один проход извлекаем и список групп, и диапазоны дат из PDF-ссылок.
+     */
+    fun parseStream(input: InputStream): ParsedGroups {
+        val reader = input.bufferedReader(Charsets.UTF_8)
+        val buf = CharArray(CHUNK_SIZE)
+        val pending = StringBuilder(CHUNK_SIZE * 2)
+        val groups = ArrayList<Group>()
+        val ranges = HashMap<String, HashMap<Season, MutableList<DateRange>>>()
+        var faculty = ""
+
+        fun addRanges(text: String) {
+            for (m in groupPattern.findAll(text)) {
+                val groupId = m.groupValues[1]
+                val season = if (m.groupValues[2] == "1") Season.AUTUMN else Season.SPRING
+                val range = DateRange(m.groupValues[3], m.groupValues[4])
+                ranges.getOrPut(groupId) {
+                    hashMapOf(Season.AUTUMN to ArrayList(), Season.SPRING to ArrayList())
+                }.getOrPut(season) { ArrayList() }.add(range)
+            }
+        }
+
+        while (true) {
+            val n = reader.read(buf)
+            if (n < 0) break
+            pending.append(buf, 0, n)
+
+            var pos = 0
+            while (pos < pending.length) {
+                val divAt = pending.indexOf("<div", pos)
+                val aAt = pending.indexOf("<a", pos)
+                val tagStart = when {
+                    divAt < 0 -> aAt
+                    aAt < 0 -> divAt
+                    else -> minOf(divAt, aAt)
+                }
+                if (tagStart < 0) {
+                    pos = keepPartialTagTail(pending, pos)
+                    break
+                }
+                if (tagStart > pos) {
+                    addRanges(pending.substring(pos, tagStart))
+                }
+                val tagEnd = findTagEnd(pending, tagStart)
+                if (tagEnd < 0) break // тег не дочитан — ждём следующий чанк
+                val tagText = pending.substring(tagStart, tagEnd + 1)
+
+                val isDiv = tagText.startsWith("<div")
+                val isFakName = isDiv && tagText.contains("class=\"fak_name\"")
+                val isGrpPeriod = isDiv && tagText.contains("class=\"grpPeriod\"")
+                if (isFakName || isGrpPeriod) {
+                    val closeDiv = pending.indexOf("</div>", tagEnd + 1)
+                    if (closeDiv < 0) break // содержимое не дочитано — ждём следующий чанк
+                    addRanges(tagText)
+                    val content = pending.substring(tagEnd + 1, closeDiv)
+                    if (isFakName) {
+                        val name = content.trim()
+                        if (name.isNotEmpty()) faculty = FacultyNames.shortname(name)
+                    } else {
+                        val m = grpIdPattern.find(tagText)
+                        if (m != null) {
+                            groups += Group(
+                                id = m.groupValues[1].dropLast(1),
+                                name = FacultyNames.removeParenthesized(content),
+                                faculty = faculty
+                            )
+                        }
+                    }
+                    pos = closeDiv + 6
+                } else {
+                    addRanges(tagText)
+                    pos = tagEnd + 1
+                }
+
+                if (pos > MAX_SLICE) {
+                    pending.delete(0, pos)
+                    pos = 0
+                }
+            }
+            if (pos > 0 && pos <= pending.length) {
+                pending.delete(0, pos)
+            }
+            if (pending.length > MAX_PENDING) {
+                // на странице нет настолько длинных конструкций; страховка от аномалий
+                pending.delete(0, pending.length - MAX_SLICE)
+            }
+        }
+        return ParsedGroups(groups, ranges)
+    }
+
+    /** Ищет конец HTML-тега — символ '>' вне кавычек. */
+    private fun findTagEnd(s: CharSequence, start: Int): Int {
+        var i = start
+        var quote = 0.toChar()
+        while (i < s.length) {
+            val c = s[i]
+            if (quote != 0.toChar()) {
+                if (c == quote) quote = 0.toChar()
+            } else {
+                when (c) {
+                    '"', '\'' -> quote = c
+                    '>' -> return i
+                }
+            }
+            i++
+        }
+        return -1
+    }
+
+    /**
+     * Хвост буфера может содержать неполное начало тега (<div... разорванный границей чанка).
+     * Сдвиг перемотки назад, чтобы оставить такой префикс в pending до прихода следующего чанка.
+     */
+    private fun keepPartialTagTail(pending: CharSequence, from: Int): Int {
+        var i = from
+        while (i < pending.length) {
+            val c = pending[i]
+            if (c == '<') {
+                val tail = pending.substring(i, pending.length)
+                if (tail == "<" || tail == "<d" || tail == "<di" || tail == "<a") return i
+            }
+            i++
+        }
+        return pending.length
+    }
+}
+
+data class ParsedGroups(
+    val groups: List<Group>,
+    val dateRanges: Map<String, Map<Season, List<DateRange>>>
+)

app/src/main/java/agzam/vyatsu/data/remote/TeacherScheduleParser.kt

@@ -0,0 +1,145 @@
+package agzam.vyatsu.data.remote
+
+import agzam.vyatsu.data.remote.pdf.TextPatterns
+import agzam.vyatsu.domain.model.Day
+import agzam.vyatsu.domain.model.Lesson
+import agzam.vyatsu.domain.model.LessonType
+import agzam.vyatsu.domain.model.TimeSlot
+import android.util.Log
+import org.jsoup.Jsoup
+import org.jsoup.nodes.Element
+import java.time.LocalDate
+import java.time.LocalTime
+import java.time.format.DateTimeFormatter
+
+object TeacherScheduleParser {
+
+    private const val TAG = "TeacherParserDebug"
+    private val DAY_REGEX = Regex("""^(понедельник|вторник|среда|четверг|пятница|суббота|воскресенье)\s+(\d{2}\.\d{2}\.\d{2})$""")
+    private val INTERVAL_REGEX = Regex("""^(\d{2}:\d{2})-(\d{2}:\d{2})$""")
+    private val GROUP_TOKEN = Regex("""(?<![\p{L}\p{N}])[А-ЯЁа-яё]{1,4}-\d{2,4}-\d{2}-\d{2}(?![\p{L}\p{N}])""")
+    private val SPLIT_BY_GROUP = Regex("""(?=(?<![\p{L}\p{N}])[А-ЯЁа-яё]{1,4}-\d{2,4}-\d{2}-\d{2}(?![\p{L}\p{N}]))""")
+    private val DATE_FMT = DateTimeFormatter.ofPattern("dd.MM.yy")
+
+    data class ParsedTeacherSchedule(val teachers: List<String>, val days: List<Day>)
+
+    fun parse(html: String): ParsedTeacherSchedule {
+        val doc = Jsoup.parse(html)
+        var headerFound = false
+        var teachers: List<String> = emptyList()
+        val days = mutableListOf<Day>()
+        var currentDate: LocalDate? = null
+        var currentIntervals: MutableList<TimeSlot>? = null
+
+        fun flushDay() {
+            val date = currentDate ?: return
+            val intervals = currentIntervals ?: return
+            if (intervals.isNotEmpty()) days.add(Day(date, intervals.toList()))
+        }
+
+        for (tr in doc.select("tr")) {
+            val tds = tr.children().filter { it.tagName() == "td" }
+            if (tds.size < 2) continue
+            val first = cellText(tds[0])
+            val second = cellText(tds[1])
+            if (!headerFound && first == "День" && second == "Интервал") {
+                teachers = tds.drop(2)
+                    .map { cellText(it.selectFirst("span") ?: it) }
+                    .filter { it.isNotEmpty() }
+                    .distinct()
+                headerFound = true
+                continue
+            }
+            val dayMatch = DAY_REGEX.matchEntire(first)
+            val intervalMatch = INTERVAL_REGEX.matchEntire(if (dayMatch != null) second else first)
+            if (dayMatch != null) {
+                flushDay()
+                currentDate = LocalDate.parse(dayMatch.groupValues[2], DATE_FMT)
+                currentIntervals = mutableListOf()
+            }
+            if (intervalMatch != null && currentIntervals != null) {
+                parseIntervalRow(tds, intervalMatch, if (dayMatch != null) 2 else 1, teachers, currentIntervals!!)
+            }
+        }
+        flushDay()
+        Log.d(TAG, "parse: teachers=$teachers days=${days.size}")
+        for (day in days) {
+            Log.d(TAG, "  parse ${day.date}: intervals=${day.intervals.size}")
+            for (slot in day.intervals) {
+                val mel = slot.lessons.filter { it.teacher == "Мельцов В.Ю." }
+                val teachersInSlot = slot.lessons.map { it.teacher }.distinct()
+                Log.d(
+                    TAG,
+                    "    slot ${slot.start}-${slot.end} total=${slot.lessons.size} meltsov=${mel.size} teachers=$teachersInSlot"
+                )
+                mel.forEach { l ->
+                    Log.d(TAG, "      mel: room=${l.room} group=${l.group} subj=${l.subject} type=${l.type} raw=${l.raw}")
+                }
+            }
+        }
+        return ParsedTeacherSchedule(teachers, days)
+    }
+
+    private fun parseIntervalRow(
+        tds: List<Element>,
+        intervalMatch: MatchResult,
+        startCol: Int,
+        teachers: List<String>,
+        intervals: MutableList<TimeSlot>
+    ) {
+        val start = LocalTime.parse(intervalMatch.groupValues[1])
+        val end = LocalTime.parse(intervalMatch.groupValues[2])
+        val lessons = mutableListOf<Lesson>()
+        for (i in teachers.indices) {
+            val cell = tds.getOrNull(startCol + i) ?: continue
+            lessons += parseCell(cell, teachers[i])
+        }
+        if (lessons.isNotEmpty()) intervals.add(TimeSlot(start, end, lessons))
+    }
+
+    private fun parseCell(cell: Element, teacher: String): List<Lesson> {
+        val raw = cellText(cell)
+        if (raw.isEmpty()) return emptyList()
+        val room = TextPatterns.ROOM_REGEX.find(raw)?.value
+        val typeMatch = TextPatterns.LESSON_TYPE_REGEX.find(raw)
+        val type = LessonType.fromRaw(typeMatch?.value?.trim() ?: "")
+        val segments = raw.split(SPLIT_BY_GROUP).map { it.trim() }.filter { it.isNotEmpty() }
+        val groupSegments = segments.filter { GROUP_TOKEN.containsMatchIn(it) }
+        if (groupSegments.isEmpty()) {
+            return listOf(
+                Lesson(
+                    raw = raw,
+                    room = room,
+                    subject = subjectOf(raw, room, typeMatch),
+                    type = type,
+                    teacher = teacher
+                )
+            )
+        }
+        val subject = subjectOf(raw, room, typeMatch)
+        return groupSegments.flatMap { segment ->
+            val groups = GROUP_TOKEN.findAll(segment).map { it.value }.distinct().toList()
+            val subgroup = TextPatterns.SUBGROUP_REGEX.find(segment)?.value
+            groups.map { group ->
+                Lesson(
+                    raw = segment,
+                    room = room,
+                    group = group,
+                    subgroup = subgroup,
+                    subject = subject,
+                    type = type,
+                    teacher = teacher
+                )
+            }
+        }
+    }
+
+    private fun subjectOf(raw: String, room: String?, typeMatch: MatchResult?): String? {
+        val end = typeMatch?.range?.first ?: GROUP_TOKEN.find(raw)?.range?.first ?: raw.length
+        val prefix = raw.substring(0, end).trim()
+        val stripped = room?.let { prefix.removePrefix(it).trim() } ?: prefix
+        return stripped.ifEmpty { null }
+    }
+
+    private fun cellText(el: Element): String = el.text().replace('\u00A0', ' ').trim()
+}

app/src/main/java/agzam/vyatsu/data/remote/TeachersParser.kt

@@ -0,0 +1,148 @@
+package agzam.vyatsu.data.remote
+
+import agzam.vyatsu.domain.model.DateRange
+import agzam.vyatsu.domain.model.Department
+import agzam.vyatsu.domain.model.ParsedDepartments
+import agzam.vyatsu.domain.model.Season
+import java.io.InputStream
+
+/**
+ * Стриминговый парсер страницы преподавателей: читает тело ответа по чанкам и
+ * разбирает его на лету, не материализуя весь HTML в память.
+ * Страница teacher.html весит ~2.4MB, поэтому весь документ грузить нельзя.
+ */
+object TeachersParser {
+
+    private val fakNameTag = Regex("""<div[^>]*class="fak_name"""")
+    private val fakIdInTag = Regex("""data-fak_id="(\d+)"""")
+    private val kafPeriodTag = Regex("""<div[^>]*class="kafPeriod"""")
+    private val kafIdInTag = Regex("""data-kaf_period_id="(\d+)"""")
+    private val prepodLink = Regex("""href="/reports/schedule/prepod/(\d+)_([12])_(\d{8})_(\d{8})\.html"""")
+    private val tagStrip = Regex("""<[^>]*>""")
+
+    private const val CHUNK_SIZE = 8192
+    private const val MAX_SLICE = 1 shl 16      // 64 KiB — защита от аномально длинных единиц
+    private const val MAX_PENDING = 1 shl 20    // 1 MiB — жёсткий потолок буфера
+
+    fun parseStream(input: InputStream): ParsedDepartments {
+        val reader = input.bufferedReader(Charsets.UTF_8)
+        val buf = CharArray(CHUNK_SIZE)
+        val pending = StringBuilder(CHUNK_SIZE * 2)
+        val departments = ArrayList<Department>()
+        val ranges = HashMap<String, HashMap<Season, MutableList<DateRange>>>()
+        var faculty = ""
+
+        fun addRanges(text: String) {
+            for (m in prepodLink.findAll(text)) {
+                val departmentId = m.groupValues[1]
+                val season = if (m.groupValues[2] == "1") Season.AUTUMN else Season.SPRING
+                val range = DateRange(m.groupValues[3], m.groupValues[4])
+                ranges.getOrPut(departmentId) {
+                    hashMapOf(Season.AUTUMN to ArrayList(), Season.SPRING to ArrayList())
+                }.getOrPut(season) { ArrayList() }.add(range)
+            }
+        }
+
+        while (true) {
+            val n = reader.read(buf)
+            if (n < 0) break
+            pending.append(buf, 0, n)
+
+            var pos = 0
+            while (pos < pending.length) {
+                val divAt = pending.indexOf("<div", pos)
+                val aAt = pending.indexOf("<a", pos)
+                val tagStart = when {
+                    divAt < 0 -> aAt
+                    aAt < 0 -> divAt
+                    else -> minOf(divAt, aAt)
+                }
+                if (tagStart < 0) {
+                    pos = keepPartialTagTail(pending, pos)
+                    break
+                }
+                if (tagStart > pos) {
+                    addRanges(pending.substring(pos, tagStart))
+                }
+                val tagEnd = findTagEnd(pending, tagStart)
+                if (tagEnd < 0) break
+                val tagText = pending.substring(tagStart, tagEnd + 1)
+
+                val isDiv = tagText.startsWith("<div")
+                val isFakName = isDiv && fakNameTag.containsMatchIn(tagText)
+                val isKafPeriod = isDiv && kafPeriodTag.containsMatchIn(tagText)
+                if (isFakName || isKafPeriod) {
+                    val closeDiv = pending.indexOf("</div>", tagEnd + 1)
+                    if (closeDiv < 0) break
+                    addRanges(tagText)
+                    val content = pending.substring(tagEnd + 1, closeDiv)
+                    if (isFakName) {
+                        val stripped = tagStrip.replace(content, "").trim()
+                        if (stripped.isNotEmpty()) faculty = FacultyNames.shortname(stripped)
+                    } else {
+                        val m = kafIdInTag.find(tagText)
+                        if (m != null) {
+                            departments += Department(
+                                departmentId = m.groupValues[1].dropLast(1),
+                                name = tagStrip.replace(content, "").trim(),
+                                faculty = faculty
+                            )
+                        }
+                    }
+                    pos = closeDiv + 6
+                } else {
+                    addRanges(tagText)
+                    pos = tagEnd + 1
+                }
+
+                if (pos > MAX_SLICE) {
+                    pending.delete(0, pos)
+                    pos = 0
+                }
+            }
+            if (pos > 0 && pos <= pending.length) {
+                pending.delete(0, pos)
+            }
+            if (pending.length > MAX_PENDING) {
+                pending.delete(0, pending.length - MAX_SLICE)
+            }
+        }
+        return ParsedDepartments(departments, ranges)
+    }
+
+    /** Ищет конец HTML-тега — символ '>' вне кавычек. */
+    private fun findTagEnd(s: CharSequence, start: Int): Int {
+        var i = start
+        var quote = 0.toChar()
+        while (i < s.length) {
+            val c = s[i]
+            if (quote != 0.toChar()) {
+                if (c == quote) quote = 0.toChar()
+            } else {
+                when (c) {
+                    '"', '\'' -> quote = c
+                    '>' -> return i
+                }
+            }
+            i++
+        }
+        return -1
+    }
+
+    /**
+     * Хвост буфера может содержать неполное начало тега (<div... разорванный границей чанка).
+     * Сдвиг перемотки назад, чтобы оставить такой префикс в pending до прихода следующего чанка.
+     */
+    private fun keepPartialTagTail(pending: CharSequence, from: Int): Int {
+        var i = from
+        while (i < pending.length) {
+            val c = pending[i]
+            if (c == '<') {
+                val tail = pending.substring(i, pending.length)
+                if (tail == "<" || tail == "<d" || tail == "<di" || tail == "<a") return i
+            }
+            i++
+        }
+        return pending.length
+    }
+}

app/src/main/java/agzam/vyatsu/data/remote/VyatsuHttpClient.kt

@@ -0,0 +1,50 @@
+package agzam.vyatsu.data.remote
+
+import android.util.Log
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import java.io.InputStream
+import java.util.concurrent.TimeUnit
+
+/**
+ * @author Agzam
+ */
+object VyatsuHttpClient {
+
+    private const val TAG = "HTTP"
+
+    private val client: OkHttpClient = OkHttpClient.Builder()
+        .connectTimeout(15, TimeUnit.SECONDS)
+        .readTimeout(30, TimeUnit.SECONDS)
+        .build()
+
+    suspend fun getText(url: String): String = withContext(Dispatchers.IO) {
+        client.newCall(Request.Builder().url(url).build()).execute().use { resp ->
+            if (!resp.isSuccessful) Log.e(TAG, "GET $url -> HTTP ${resp.code}")
+            check(resp.isSuccessful) { "HTTP ${resp.code} for $url" }
+            resp.body!!.string()
+        }
+    }
+
+    suspend fun getBytes(url: String): ByteArray = withContext(Dispatchers.IO) {
+        client.newCall(Request.Builder().url(url).build()).execute().use { resp ->
+            if (!resp.isSuccessful) Log.e(TAG, "GET $url -> HTTP ${resp.code}")
+            check(resp.isSuccessful) { "HTTP ${resp.code} for $url" }
+            resp.body!!.bytes()
+        }
+    }
+
+    /**
+     * Открывает потоковое тело ответа. Вызывающий обязан закрыть
+     * возвращённый [InputStream], чтобы вернуть соединение в пул.
+     */
+    suspend fun openStream(url: String): InputStream = withContext(Dispatchers.IO) {
+        val resp = client.newCall(Request.Builder().url(url).build()).execute()
+        if (!resp.isSuccessful) Log.e(TAG, "GET $url -> HTTP ${resp.code}")
+        check(resp.isSuccessful) { "HTTP ${resp.code} for $url" }
+        resp.body!!.byteStream()
+    }
+
+}

app/src/main/java/agzam/vyatsu/data/remote/VyatsuUrls.kt

@@ -0,0 +1,18 @@
+package agzam.vyatsu.data.remote
+
+import agzam.vyatsu.domain.model.DateRange
+import agzam.vyatsu.domain.model.Season
+
+object VyatsuUrls {
+
+    const val GROUPS_PAGE = "https://www.vyatsu.ru/studentu-1/spravochnaya-informatsiya/raspisanie-zanyatiy-dlya-studentov.html"
+    const val PDF_BASEURL = "https://www.vyatsu.ru/reports/schedule/Group"
+
+    fun groupPdfUrl(groupId: String, season: Season, range: DateRange): String = "$PDF_BASEURL/${groupId}_${season.apiKey}_${range.first}_${range.second}.pdf"
+
+    const val TEACHER_PAGE = "https://www.vyatsu.ru/studentu-1/spravochnaya-informatsiya/teacher.html"
+    const val PREPOD_BASEURL = "https://www.vyatsu.ru/reports/schedule/prepod"
+
+    fun teacherPrepodUrl(departmentId: String, season: Season, range: DateRange): String = "$PREPOD_BASEURL/${departmentId}_${season.apiKey}_${range.first}_${range.second}.html"
+
+}

app/src/main/java/agzam/vyatsu/data/remote/pdf/Pdf2Table.kt

@@ -0,0 +1,244 @@
+package agzam.vyatsu.data.remote.pdf
+
+import android.graphics.Path
+import android.graphics.PointF
+import com.tom_roush.pdfbox.contentstream.PDFGraphicsStreamEngine
+import com.tom_roush.pdfbox.cos.COSName
+import com.tom_roush.pdfbox.pdmodel.PDPage
+import com.tom_roush.pdfbox.pdmodel.graphics.color.PDColor
+import com.tom_roush.pdfbox.pdmodel.graphics.image.PDImage
+import java.util.Locale
+import kotlin.math.max
+import kotlin.math.min
+
+/**
+ * - Парсит страницу PDF в набор линий
+ * - Позволяет получить таблицу
+ * - Позволяет конвертировать в SVG (для отладки)
+ *
+ * Требуется вызов [processPage] для парсинга
+ * @author Agzam
+ */
+class Pdf2Table(page: PDPage) : PDFGraphicsStreamEngine(page) {
+
+    data class PdfLine(val x1: Float, val y1: Float, val x2: Float, val y2: Float) {
+        val left: Float get() = min(x1, x2)
+        val right: Float get() = max(x1, x2)
+        val top: Float get() = min(y1, y2)
+        val bottom: Float get() = max(y1, y2)
+    }
+    data class TableColumn(val x: Float, val width: Float, val cells: List<TableCell>) {
+        val right: Float get() = x + width
+    }
+    data class TableCell(val x: Float, val y: Float, val width: Float, val height: Float) {
+        val centerY: Float get() = y + height/2f
+    }
+
+    private val _lines = mutableListOf<PdfLine>()
+
+    private val svgBuilder = StringBuilder()
+    private val currentPath = StringBuilder()
+    val tableSvg = StringBuilder()
+
+
+    private val currentSubPathLines = mutableListOf<PdfLine>()
+    private var lastPoint = PointF(0f, 0f)
+
+    /**
+     * Представляет страницу в SVG формате
+     */
+    fun asSvg(): String {
+        val mediaBox = page.mediaBox
+        val width = mediaBox.width
+        val height = mediaBox.height
+        return """
+            <svg width="$width" height="$height" viewBox="0 0 $width $height" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style='font-size: 50%;'>
+                <g>${svgBuilder}</g>
+                <g>${tableSvg}</g>
+            </svg>
+        """.trimIndent()
+    }
+
+    override fun appendRectangle(rp0: PointF?, rp1: PointF?, rp2: PointF?, rp3: PointF?) {
+        if (rp0 == null || rp1 == null || rp2 == null || rp3 == null) return
+        val p0 = t(rp0)
+        val p1 = t(rp1)
+        val p2 = t(rp2)
+        val p3 = t(rp3)
+        currentPath.append(String.format(Locale.US, "M %.2f %.2f L %.2f %.2f L %.2f %.2f L %.2f %.2f Z ", p0.x, p0.y, p1.x, p1.y, p2.x, p2.y, p3.x, p3.y))
+        currentSubPathLines.add(PdfLine(p0.x, p0.y, p1.x, p1.y))
+        currentSubPathLines.add(PdfLine(p1.x, p1.y, p2.x, p2.y))
+        currentSubPathLines.add(PdfLine(p2.x, p2.y, p3.x, p3.y))
+        currentSubPathLines.add(PdfLine(p3.x, p3.y, p0.x, p0.y))
+        lastPoint.set(p3.x, p3.y)
+    }
+
+    override fun moveTo(rx: Float, ry: Float) {
+        val x = tx(rx)
+        val y = ty(ry)
+        currentPath.append(String.format(Locale.US, "M %.2f %.2f ", x, y))
+        lastPoint.set(x, y)
+    }
+
+    override fun lineTo(rx: Float, ry: Float) {
+        val x = tx(rx)
+        val y = ty(ry)
+        currentPath.append(String.format(Locale.US, "L %.2f %.2f ", x, y))
+        currentSubPathLines.add(PdfLine(lastPoint.x, lastPoint.y, x, y))
+        lastPoint.set(x, y)
+    }
+
+    override fun curveTo(rcx1: Float, rcy1: Float, rcx2: Float, rcy2: Float, ex: Float, ey: Float) {
+        val cx1 = tx(rcx1)
+        val cy1 = ty(rcy1)
+        val cx2 = tx(rcx2)
+        val cy2 = ty(rcy2)
+        val endX = tx(ex)
+        val endY = ty(ey)
+        currentPath.append(String.format(Locale.US, "C %.2f %.2f, %.2f %.2f, %.2f %.2f ", cx1, cy1, cx2, cy2, endX, endY))
+        lastPoint.set(endX, endY)
+    }
+
+    override fun getCurrentPoint(): PointF {
+        return lastPoint
+    }
+
+    override fun closePath() {
+        currentPath.append("Z ")
+    }
+
+    override fun endPath() {
+        currentPath.clear()
+        currentSubPathLines.clear()
+    }
+
+    override fun strokePath() {
+        val strokeColor = graphicsState.strokingColor.toRGBHex()
+        val lineWidth = graphicsState.lineWidth
+        if (currentPath.isNotEmpty()) {
+            svgBuilder.append("<path d=\"$currentPath\" stroke=\"$strokeColor\" stroke-width=\"$lineWidth\" fill=\"none\" />\n")
+            _lines.addAll(currentSubPathLines)
+        }
+        currentPath.clear()
+        currentSubPathLines.clear()
+    }
+
+    override fun fillPath(p0: Path.FillType?) {
+        val fillColor = graphicsState.nonStrokingColor.toRGBHex()
+        val rule = if (p0 == Path.FillType.EVEN_ODD) "evenodd" else "nonzero"
+        if (currentPath.isNotEmpty()) {
+            svgBuilder.append("<path d=\"$currentPath\" fill=\"$fillColor\" fill-rule=\"$rule\" />\n")
+             _lines.addAll(currentSubPathLines)
+        }
+        currentPath.clear()
+        currentSubPathLines.clear()
+    }
+
+    override fun fillAndStrokePath(p0: Path.FillType?) {
+        val strokeColor = graphicsState.strokingColor.toRGBHex()
+        val fillColor = graphicsState.nonStrokingColor.toRGBHex()
+        val lineWidth = graphicsState.lineWidth
+        val rule = if (p0 == Path.FillType.EVEN_ODD) "evenodd" else "nonzero"
+        if (currentPath.isNotEmpty()) {
+            svgBuilder.append("<path d=\"$currentPath\" fill=\"$fillColor\" fill-rule=\"$rule\" stroke=\"$strokeColor\" stroke-width=\"$lineWidth\" />\n")
+            _lines.addAll(currentSubPathLines)
+        }
+        currentPath.clear()
+        currentSubPathLines.clear()
+    }
+
+    override fun shadingFill(p0: COSName?) {
+        currentPath.clear()
+        currentSubPathLines.clear()
+    }
+
+    private fun PDColor.toRGBHex(): String {
+        return try {
+            val rgb = this.toRGB()
+            String.format(Locale.US, "#%06X", rgb and 0xFFFFFF)
+        } catch (_: Exception) {
+            "#000000"
+        }
+    }
+
+    override fun drawImage(p0: PDImage?) {}
+    override fun clip(p0: Path.FillType?) {}
+
+    private fun tx(x: Float): Float {
+        return x
+    }
+    private fun ty(y: Float): Float {
+        return page.mediaBox.height - y
+    }
+    private fun t(p: PointF): PointF {
+        return PointF(tx(p.x), ty(p.y))
+    }
+
+    /**
+     * Представляет страницу как набор колонок с ячейками
+     *
+     * Сначала делит страницу на столбики, затем, изолированно для каждого столбика делит его на ячейки
+     */
+    fun asTable(): List<TableColumn> {
+        val verticalLines = _lines.filter { it.x1 == it.x2 }
+        val horizontalLines = _lines.filter { it.y1 == it.y2 }
+
+        // Список уникальных "x", чтобы разделить весь лист на колонки
+        val xs = merge(verticalLines.map { it.x1 })
+
+        for (v in horizontalLines) {
+            tableSvg.append("<rect fill='#0000ff55' x='${v.left}' y='${v.top}' width='${v.right-v.left}' height='3'/>\n")
+        }
+
+        val columns = mutableListOf<TableColumn>()
+        for (i in 0 until xs.size - 1) {
+            val left = xs[i]
+            val right = xs[i + 1]
+
+            tableSvg.append("<rect fill='${if (i % 2 == 0) "#f00" else "#0f0"}' x='$left' y='3' width='${right-left}' height='3'/>\n")
+
+            val colWidth = right - left
+            if (colWidth <= 2f) continue
+
+            // Выборка горизонтальных линиий которые пересекают колонку
+            val linesInColumn = horizontalLines.filter { line -> (line.left-2f <= left && right <= line.right+2f) }
+
+            val ys = merge(linesInColumn.map { it.y1 }) // Уникальные "y", чтобы разделить уже столбик
+
+            val cells = mutableListOf<TableCell>()
+            for (ii in 0 until ys.size - 1) {
+                val top = ys[ii]
+                val bottom = ys[ii+1]
+                cells.add(TableCell(left, top, right-left, bottom-top))
+
+                tableSvg.append("<rect fill='${if (i % 2 == 0) "#ff" else "#9e"}${if (ii % 2 == 0) "ff9e" else "9e9e"}' x='$left' y='$top' width='${right-left}' height='${bottom-top}'/>\n")
+            }
+            columns.add(TableColumn(left, right-left, cells))
+        }
+
+        return columns
+    }
+
+    /**
+     * Убирает дубликаты, схлопывает близкие точки
+     */
+    private fun merge(fs: List<Float>): List<Float> {
+        val s = fs.distinct().sorted()
+        val result = mutableListOf<Float>()
+        if(s.isEmpty()) return result
+        result.add(s[0])
+        var pad = 0f
+        for (i in 0 until s.size - 1) {
+            val dst = s[i + 1] - s[i]
+            if (dst <= 4f) {
+                pad = dst/2f
+                result[result.size-1] = result.last() + pad
+                continue
+            }
+            result.add(s[i+1]+pad)
+            pad = 0f
+        }
+        return result
+    }
+
+}

app/src/main/java/agzam/vyatsu/data/remote/pdf/PdfScheduleParser.kt

@@ -0,0 +1,221 @@
+package agzam.vyatsu.data.remote.pdf
+
+import agzam.vyatsu.domain.model.Day
+import agzam.vyatsu.domain.model.Lesson
+import agzam.vyatsu.domain.model.LessonType
+import agzam.vyatsu.domain.model.TimeSlot
+import android.util.Log
+import com.tom_roush.pdfbox.pdmodel.PDDocument
+import java.time.LocalDate
+import java.time.LocalTime
+import java.time.format.DateTimeFormatter
+import kotlin.math.roundToInt
+
+/**
+ * Парсинг расписания из PDF
+ * @author Agzam
+ */
+object PdfScheduleParser {
+
+    private const val TAG = "PDF-SCHEDULE"
+    private const val SVG_TAG = "PDF-SVG"
+
+    private val TIME_FORMAT = DateTimeFormatter.ofPattern("HH:mm")
+    private val DATE_FORMAT = DateTimeFormatter.ofPattern("dd.MM.yy")
+
+    private fun timeFrom(timeString: String?): LocalTime? { return runCatching { LocalTime.parse(timeString, TIME_FORMAT) }.getOrNull() }
+    private fun dateFrom(dateString: String?): LocalDate? { return runCatching { LocalDate.parse(dateString, DATE_FORMAT) }.getOrNull() }
+
+    fun parse(pdfBytes: ByteArray): List<Day> {
+        Log.d(TAG, "Parsing ${pdfBytes.size} bytes")
+        val doc = try {
+            PDDocument.load(pdfBytes)
+        } catch (t: Throwable) {
+            Log.e(TAG, "PDDocument.load failed", t)
+            throw t
+        }
+
+        val days = mutableListOf<Day>()
+        var group: String? = null
+
+        try {
+            for (pageIndex in 0 until doc.numberOfPages) {
+                Log.v(TAG, "============ Page $pageIndex ============")
+
+                // Парсинг ячеек таблицы
+                val page = doc.getPage(pageIndex)
+                val svg = Pdf2Table(page)
+                svg.processPage(page)
+                val cols = svg.asTable()
+
+                if(cols.size != 3) throw RuntimeException("Found columns: ${cols.size}/3")
+
+                // Парсинг текста
+                val textStripper = PdfTextParser()
+                textStripper.startPage = pageIndex + 1
+                textStripper.endPage = pageIndex + 1
+                textStripper.getText(doc)
+                val texts = textStripper.blocks
+
+                for(text in texts) {
+                    svg.tableSvg.appendLine("<text x='${text.x}' y='${text.y}'>${text.text}</text>")
+                    svg.tableSvg.appendLine("<circle cx='${text.x}' cy='${text.y}' r='1' fill='red'/>")
+                }
+
+                val daysColumn      = cols[0] // Колонка "День", имеет формат "<день> dd.mm.yy"
+                val intervalsColumn = cols[1] // Колонка "Интервал", имеет формат "HH:mm-HH:mm"
+                val lessonsColumn   = cols[2] // Колонка с инофрмацией о паре
+
+                Log.v(TAG, "Days:  ${cols[0].cells.size}")
+                Log.v(TAG, "Times: ${cols[1].cells.size}")
+                Log.v(TAG, "Types: ${cols[2].cells.size}")
+
+                /** Мерджит ячейки в одну строку, пробел в качестве слиятиля */
+                fun join(texts: List<PdfTextParser.TextBlock>): String {
+                    val text = StringBuilder()
+                    for (t in texts) {
+                        if(!text.isEmpty()) text.append(' ')
+                        text.append(t.text)
+                    }
+                    return text.toString()
+                }
+
+                /**
+                 * Извлекает контент из PDF внутри ячейки
+                 * (Подразумевается что в ячейке нет "\n", поэтому используется пробел для слияния)
+                 */
+                fun content(cell: Pdf2Table.TableCell): String {
+                    return join(texts.filter {
+                        cell.x <= it.x && it.x <= cell.x + cell.width && cell.y <= it.y && it.y < cell.y + cell.height
+                    })
+                }
+
+                /**
+                 * Выбирает все ячейки в целевой колонке, которые находятся на одном уровне (строке) с заданной ячейкой
+                 * @param column - целевая колонка, в которой производится поиск ячеек.
+                 * @param cell - ячейка-ориентир, определяющая границы строки по вертикали.
+                 * @return Список ячеек из [column], попавших в диапазон строки
+                 */
+                fun select(column: Pdf2Table.TableColumn, cell: Pdf2Table.TableCell): List<Pdf2Table.TableCell> {
+                    return column.cells.filter {
+                        cell.y <= it.centerY && it.centerY < cell.y + cell.height
+                    }
+                }
+
+                for (dayCell in daysColumn.cells) {
+                    val day = content(dayCell).split(' ')
+                    if(day.size == 1) {
+                        Log.v(TAG, "day.first(): ${day.first()}")
+                    }
+                    if(day.size == 1 && day.first() == "День") {
+                        val groupCell = select(lessonsColumn, dayCell).firstOrNull() ?: continue
+                        group = content(groupCell)
+                        Log.v(TAG, "Group: $group")
+                        continue
+                    }
+                    if(day.size != 2) {
+                        Log.w(TAG, "Day data is not in format <day> <date>: $day")
+                        continue // XXX: добавить защиту от заголовка и выбрасывать исключения вместо пропуска?
+                    }
+
+                    val date = dateFrom(day[1]) ?: continue
+                    val intervals = mutableListOf<TimeSlot>()
+                    // TODO: день недели (а нужен ли?)
+
+                    Log.v(TAG, "############################## $day ############################## ")
+                    for(intervalCell in select(intervalsColumn, dayCell)) { // День содержит интервалы
+                        val timeContent = content(intervalCell)
+                        val range = timeContent.split('-')
+                        if(range.size != 2) continue // XXX: выбрасывать ошибку?
+
+                        val start   = timeFrom(range[0]) ?: continue
+                        val end     = timeFrom(range[1]) ?: continue
+                        val lessons = mutableListOf<Lesson>()
+
+                        Log.v(TAG, "=== $timeContent ===")
+                        for(lessonCell in select(lessonsColumn, intervalCell)) { // Информация о паре, может быть разбита, например на подгруппы
+                            val content = content(lessonCell)
+                            Log.v(TAG, "- $content")
+                            // TODO: парсинг контента лекции
+
+                            // Поиск кабинета в строке, ибо он последний, если их несколько - то скорее всего разделение на подгруппы
+                            var found = 0
+                            var currentStart = 0
+                            for (roomMatch in TextPatterns.ROOM_REGEX.findAll(content)) {
+                                found++
+
+                                val raw = content.substring(currentStart, roomMatch.range.last + 1)
+                                currentStart = roomMatch.range.last + 1
+
+                                // Предполагаемый формат: [группа], [XX подгруппа] <предмет> <тип> [id + тип] <ФИО> <кабинет>
+
+                                val room = roomMatch.value
+
+                                val typeMatch = TextPatterns.LESSON_TYPE_REGEX.findAll(raw).toList()
+                                if(typeMatch.isEmpty()) {
+                                    lessons.add(Lesson(
+                                        raw=raw,
+                                        room=room,
+                                    ))
+                                    continue
+                                }
+                                var subject = raw.substring(0, typeMatch.first().range.first).trim() // TODO: сейчас [группа], [XX подгруппа] <предмет> - можно достать подгруппу
+                                val type = LessonType.fromRaw(typeMatch.first().value.trim())
+                                val teacher = raw.substring(typeMatch.last().range.last+1, raw.length - room.length).trim()
+                                var subgroup: String? = null
+                                Log.d(TAG, "$subject $group")
+                                if(group != null && (subject.startsWith("$group,") || subject.startsWith("$group "))) {
+                                    subject = subject.substring(group.length + 1).trim()
+                                    val subgroupMatch = TextPatterns.SUBGROUP_REGEX.find(subject)
+                                    if(subgroupMatch != null) {
+                                        subgroup = subgroupMatch.value.trim()
+                                        subject = subject.removeRange(subgroupMatch.range).trim()
+                                    }
+                                }
+
+
+                                lessons.add(Lesson(
+                                    raw=raw,
+                                    subject=subject,
+                                    room=room,
+                                    type=type,
+                                    teacher=teacher,
+                                    subgroup=subgroup
+                                ))
+                            }
+
+                            if(found == 0) lessons.add(Lesson(raw=content))
+
+                        }
+                        intervals.add(TimeSlot(start = start, end = end, lessons = lessons))
+                    }
+                    days.add(Day(date=date, intervals=intervals))
+                }
+                for (text in texts.filter { it.rotation != 0f }) {
+                    Log.v(TAG, "${text.x.roundToInt()}\t${text.y.roundToInt()}\t${text.text}")
+                }
+
+                /** Вывод таблички из PDF в SVG формате + отладочные жлементы из [Pdf2Table.asTable] **/
+                Log.v(SVG_TAG,  "====")
+                Log.v(SVG_TAG+ "-" + (pageIndex+1),  "====")
+                for(line in  svg.asSvg().split("\n")) {
+                    if(line.length > 250) {
+                        Log.v(SVG_TAG, "length: " + line.length)
+                        Log.v(SVG_TAG + "-" + (pageIndex+1),  "length: " + line.length)
+                        continue
+                    }
+                    Log.v(SVG_TAG,  line)
+                    Log.v(SVG_TAG + "-" + (pageIndex+1),  line)
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Parsing error", e)
+            e.printStackTrace()
+        } finally {
+            doc.close()
+        }
+        Log.v(TAG, "Days extracted: $days")
+        return days
+    }
+
+}

app/src/main/java/agzam/vyatsu/data/remote/pdf/PdfTextParser.kt

@@ -0,0 +1,76 @@
+package agzam.vyatsu.data.remote.pdf
+
+import com.tom_roush.pdfbox.text.PDFTextStripper
+import com.tom_roush.pdfbox.text.TextPosition
+
+/**
+ * Парсер блоков текста из PDF
+ * @author Agzam
+ */
+
+class PdfTextParser : PDFTextStripper() {
+
+    data class TextBlock(
+        val text: String,
+        val x: Float,
+        val y: Float,
+        val width: Float,
+        val height: Float,
+        val rotation: Float
+    )
+
+    val blocks = mutableListOf<TextBlock>()
+
+    init {
+        sortByPosition = true
+    }
+
+    override fun writeString(string: String?, textPositions: MutableList<TextPosition>?) {
+        if (textPositions.isNullOrEmpty()) return
+
+        val currentWordChars = mutableListOf<TextPosition>()
+
+        for (tp in textPositions) {
+            val unicode = tp.unicode
+
+            if (unicode == " " || unicode == "\u00A0" || unicode == "\t") {
+                addWordBlock(currentWordChars)
+                currentWordChars.clear()
+            } else {
+                currentWordChars.add(tp)
+            }
+        }
+
+        addWordBlock(currentWordChars)
+    }
+
+    private fun addWordBlock(wordChars: List<TextPosition>) {
+        if (wordChars.isEmpty()) return
+
+        val first = wordChars.first()
+        val last = wordChars.last()
+
+        val wordText = wordChars.joinToString("") { it.unicode }.trim()
+        if (wordText.isEmpty()) return
+
+        val matrix = first.textMatrix
+        val rotation = first.dir
+
+        val totalWidth = (last.xDirAdj + last.widthDirAdj) - first.xDirAdj
+
+        val x = matrix.translateX
+        val y = matrix.translateY - first.heightDir
+        val height = first.heightDir
+
+        blocks.add(
+            TextBlock(
+                text = wordText,
+                x = x,
+                y = currentPage.mediaBox.height - y - height,
+                width = totalWidth,
+                height = height,
+                rotation = rotation
+            )
+        )
+    }
+}

app/src/main/java/agzam/vyatsu/data/remote/pdf/TextPatterns.kt

@@ -0,0 +1,12 @@
+package agzam.vyatsu.data.remote.pdf
+
+import agzam.vyatsu.domain.model.LessonType
+
+object TextPatterns {
+
+    val ROOM_REGEX = Regex("""(?<=^|\s)\d{1,2}-\d{3}[_a-zA-Zа-яА-Я]?(?=\s|$)""")
+
+    val LESSON_TYPE_REGEX = Regex(LessonType.entries.joinToString(separator = "|") { Regex.escape(it.label) }.let { """(?<=^|\s)($it)(?=\s|$)""" })
+
+    val SUBGROUP_REGEX = Regex("""\d{2}\sподгруппа""", RegexOption.IGNORE_CASE)
+}

app/src/main/java/agzam/vyatsu/data/remote/update/GiteaReleaseApi.kt

@@ -0,0 +1,56 @@
+package agzam.vyatsu.data.remote.update
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+import com.squareup.moshi.Moshi
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import java.io.IOException
+
+@JsonClass(generateAdapter = true)
+data class GiteaRelease(
+    @Json(name = "tag_name") val tagName: String?,
+    val name: String?,
+    val body: String?,
+    val assets: List<GiteaAsset> = emptyList()
+)
+
+@JsonClass(generateAdapter = true)
+data class GiteaAsset(
+    val name: String?,
+    @Json(name = "browser_download_url") val browserDownloadUrl: String?
+)
+
+class GiteaReleaseApi(
+    private val client: OkHttpClient,
+    private val baseUrl: String = "https://vantablacktea.ddns.net",
+    private val repoPath: String = "agzam/vyatsu-schedule"
+) {
+
+    private val moshi = Moshi.Builder().build()
+    private val releaseAdapter = moshi.adapter(GiteaRelease::class.java)
+
+    /**
+     * Возвращает последний релиз или null, если релизов ещё нет (404).
+     */
+    suspend fun latestRelease(): GiteaRelease? {
+        val url = "$baseUrl/api/v1/repos/$repoPath/releases/latest"
+        val request = Request.Builder().url(url).get().build()
+
+        return client.newCall(request).execute().use { resp ->
+            when {
+                resp.code == 404 -> null
+                !resp.isSuccessful -> throw IOException("HTTP ${resp.code} при запросе релиза")
+                else -> {
+                    val body = resp.body ?: throw IOException("Пустой ответ сервера")
+                    releaseAdapter.fromJson(body.source())
+                }
+            }
+        }
+    }
+
+    fun apkDownloadUrl(release: GiteaRelease): String? =
+        release.assets
+            .firstOrNull { it.name?.endsWith(".apk", ignoreCase = true) == true }
+            ?.browserDownloadUrl
+}

app/src/main/java/agzam/vyatsu/data/repository/GroupRepositoryImpl.kt

@@ -0,0 +1,86 @@
+package agzam.vyatsu.data.repository
+
+import agzam.vyatsu.data.local.GroupDao
+import agzam.vyatsu.data.local.GroupEntity
+import agzam.vyatsu.data.local.GroupPeriodEntity
+import agzam.vyatsu.data.remote.GroupsParser
+import agzam.vyatsu.data.remote.VyatsuHttpClient
+import agzam.vyatsu.data.remote.VyatsuUrls
+import agzam.vyatsu.domain.ScheduleDates
+import agzam.vyatsu.domain.model.Group
+import agzam.vyatsu.domain.repository.GroupRepository
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.withContext
+
+class GroupRepositoryImpl(
+    private val groupDao: GroupDao,
+) : GroupRepository {
+
+    override fun observeGroups(): Flow<List<Group>> =
+        groupDao.observeAll().map { list -> list.map { it.toDomain() } }
+
+    override suspend fun getGroups(): List<Group> =
+        groupDao.observeAll().first().map { it.toDomain() }
+
+    override suspend fun getFaculties(): List<String> = groupDao.getFaculties()
+
+    override suspend fun refreshIfStale(): Boolean {
+        val last = groupDao.maxSyncedAt()
+        if (last != null && now() - last < STALE_WINDOW_MS) {
+            return true
+        }
+        refresh()
+        return true
+    }
+
+    override suspend fun forceRefresh(): Boolean {
+        refresh()
+        return true
+    }
+
+    private suspend fun refresh() {
+        val parsed = withContext(Dispatchers.IO) {
+            VyatsuHttpClient.openStream(VyatsuUrls.GROUPS_PAGE).use(GroupsParser::parseStream)
+        }
+        val now = now()
+        groupDao.insertAll(
+            parsed.groups.map { group ->
+                GroupEntity(
+                    id = group.id,
+                    name = group.name,
+                    faculty = group.faculty,
+                    lastSyncedAt = now
+                )
+            }
+        )
+        val periods = parsed.groups.flatMap { group ->
+            parsed.dateRanges[group.id].orEmpty().flatMap { (season, ranges) ->
+                ranges.map { range ->
+                    GroupPeriodEntity(
+                        groupId = group.id,
+                        season = season,
+                        weekStart = ScheduleDates.asDate(range.first).toEpochDay(),
+                        weekEnd = ScheduleDates.asDate(range.second).toEpochDay()
+                    )
+                }
+            }
+        }
+        groupDao.deleteAllPeriods()
+        groupDao.insertPeriods(periods)
+    }
+
+    private fun now(): Long = System.currentTimeMillis()
+
+    private fun GroupEntity.toDomain(): Group = Group(
+        id = id,
+        name = name,
+        faculty = faculty
+    )
+
+    companion object {
+        private const val STALE_WINDOW_MS = 12 * 60 * 60 * 1000L
+    }
+}

app/src/main/java/agzam/vyatsu/data/repository/PreferencesRepositoryImpl.kt

@@ -0,0 +1,32 @@
+package agzam.vyatsu.data.repository
+
+import agzam.vyatsu.data.local.PreferencesDao
+import agzam.vyatsu.domain.repository.PreferencesRepository
+
+class PreferencesRepositoryImpl(
+    private val dao: PreferencesDao
+) : PreferencesRepository {
+    override suspend fun selectedGroupId(): String? = dao.selectedGroupId()
+    override suspend fun setSelectedGroup(groupId: String) = dao.setSelectedGroup(groupId)
+    override suspend fun clearSelectedGroup() = dao.clearSelectedGroup()
+    override suspend fun selectedWeekStart(): String? = dao.selectedWeekStart()
+    override suspend fun setSelectedWeekStart(weekStart: String) = dao.setSelectedWeekStart(weekStart)
+    override suspend fun selectedDayDate(): String? = dao.selectedDayDate()
+    override suspend fun setSelectedDayDate(date: String) = dao.setSelectedDayDate(date)
+
+    override suspend fun selectedTeacherId(): String? = dao.selectedTeacherId()
+    override suspend fun setSelectedTeacherId(id: String) = dao.setSelectedTeacherId(id)
+    override suspend fun selectedTeacherWeekStart(): String? = dao.selectedTeacherWeekStart()
+    override suspend fun setSelectedTeacherWeekStart(weekStart: String) =
+        dao.setSelectedTeacherWeekStart(weekStart)
+    override suspend fun selectedTeacherDayDate(): String? = dao.selectedTeacherDayDate()
+    override suspend fun setSelectedTeacherDayDate(date: String) =
+        dao.setSelectedTeacherDayDate(date)
+    override suspend fun clearSelectedTeacher() = dao.clearSelectedTeacher()
+
+    override suspend fun autoUpdateEnabled(): Boolean = dao.autoUpdateEnabled() == "true"
+    override suspend fun setAutoUpdateEnabled(enabled: Boolean) = dao.setAutoUpdateEnabled(enabled.toString())
+
+    override suspend fun autoUpdateAsked(): Boolean = dao.autoUpdateAsked() == "true"
+    override suspend fun setAutoUpdateAsked(asked: Boolean) = dao.setAutoUpdateAsked(asked.toString())
+}

app/src/main/java/agzam/vyatsu/data/repository/ScheduleRepositoryImpl.kt

@@ -0,0 +1,214 @@
+package agzam.vyatsu.data.repository
+
+import agzam.vyatsu.data.local.DayEntity
+import agzam.vyatsu.data.local.GroupPeriodEntity
+import agzam.vyatsu.data.local.LessonEntity
+import agzam.vyatsu.data.local.ScheduleDao
+import agzam.vyatsu.data.local.ScheduleEntity
+import agzam.vyatsu.data.local.GroupDao
+import agzam.vyatsu.data.local.GroupEntity
+import agzam.vyatsu.data.remote.pdf.PdfScheduleParser
+import agzam.vyatsu.data.remote.VyatsuHttpClient
+import agzam.vyatsu.data.remote.VyatsuUrls
+import agzam.vyatsu.domain.ScheduleDates
+import agzam.vyatsu.domain.model.Day
+import agzam.vyatsu.domain.model.DateRange
+import agzam.vyatsu.domain.model.Lesson
+import agzam.vyatsu.domain.model.Schedule
+import agzam.vyatsu.domain.model.SchedulePeriod
+import agzam.vyatsu.domain.model.Season
+import agzam.vyatsu.domain.model.TimeSlot
+import agzam.vyatsu.domain.repository.ScheduleRepository
+import android.util.Log
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+import java.time.LocalDate
+import java.time.LocalTime
+
+class ScheduleRepositoryImpl(
+    private val scheduleDao: ScheduleDao,
+    private val groupDao: GroupDao
+) : ScheduleRepository {
+
+    override fun observeSchedule(groupId: String): Flow<Schedule?> =
+        combine(
+            scheduleDao.observeSchedules(groupId),
+            scheduleDao.observeDaysForGroup(groupId),
+            scheduleDao.observeLessonsForGroup(groupId)
+        ) { schedules, days, lessons ->
+            buildSchedule(schedules, days, lessons)
+        }
+
+    override suspend fun getSchedule(groupId: String): Schedule? =
+        buildSchedule(
+            scheduleDao.getSchedules(groupId),
+            scheduleDao.getDaysForGroup(groupId),
+            scheduleDao.getLessonsForGroup(groupId)
+        )
+
+    override suspend fun sync(groupId: String): Schedule? {
+        Log.d(TAG, "sync(groupId=$groupId) start")
+        val group = groupDao.getById(groupId) ?: run {
+            Log.w(TAG, "sync: group $groupId not found in DB")
+            return null
+        }
+        val today = ScheduleDates.moscowToday().toEpochDay()
+        val periods = groupDao.getCurrentAndFuturePeriods(groupId, today)
+        if (periods.isEmpty()) {
+            Log.w(TAG, "sync: no current/future periods for group ${group.id}")
+            return null
+        }
+
+        for (period in periods) {
+            syncPeriod(group, period)
+        }
+
+        scheduleDao.trim(groupId, MAX_PERIODS)
+
+        return getSchedule(groupId)
+    }
+
+    private suspend fun syncPeriod(group: GroupEntity, period: GroupPeriodEntity) {
+        val season = period.season
+        val range = DateRange(
+            LocalDate.ofEpochDay(period.weekStart).format(RANGE_FMT),
+            LocalDate.ofEpochDay(period.weekEnd).format(RANGE_FMT)
+        )
+        val existing = scheduleDao.getSchedules(group.id)
+            .firstOrNull { it.season == season && it.weekStart == period.weekStart }
+        val isCurrent = ScheduleDates.moscowToday().toEpochDay() in period.weekStart..period.weekEnd
+        if (existing != null && !isCurrent && now() - existing.lastSyncedAt < STALE_WINDOW_MS) {
+            Log.d(TAG, "sync: period $range up to date, skip")
+            return
+        }
+
+        try {
+            val pdfUrl = VyatsuUrls.groupPdfUrl(group.id, season, range)
+            Log.d(TAG, "sync: downloading $pdfUrl")
+            val bytes = VyatsuHttpClient.getBytes(pdfUrl)
+            Log.d(TAG, "sync: downloaded ${bytes.size} bytes")
+
+            val days = PdfScheduleParser.parse(bytes)
+            Log.d(TAG, "sync: parsed ${days.size} days")
+
+            val scheduleId = existing?.id ?: scheduleDao.insertSchedule(
+                ScheduleEntity(
+                    groupId = group.id,
+                    season = season,
+                    weekStart = period.weekStart,
+                    weekEnd = period.weekEnd,
+                    lastSyncedAt = now()
+                )
+            )
+            replaceDays(scheduleId, days)
+            Log.d(TAG, "sync: period $range synced")
+        } catch (e: Throwable) {
+            Log.e(TAG, "sync: failed for ${group.id} period $range (${e::class.simpleName}: ${e.message})", e)
+        }
+    }
+
+    override suspend fun isStale(groupId: String): Boolean {
+        val schedules = scheduleDao.getSchedules(groupId)
+        val latest = schedules.maxByOrNull { it.weekStart } ?: return true
+        return now() - latest.lastSyncedAt > STALE_WINDOW_MS
+    }
+
+    override suspend fun clearPeriod(groupId: String, period: SchedulePeriod) {
+        scheduleDao.deleteSchedule(
+            groupId = groupId,
+            season = period.season.name,
+            weekStart = period.weekStart.toEpochDay()
+        )
+    }
+
+    override suspend fun clearAll(groupId: String) = scheduleDao.deleteAll(groupId)
+
+    private suspend fun replaceDays(scheduleId: Long, days: List<Day>) {
+        scheduleDao.deleteDaysForSchedule(scheduleId)
+        val dayEntities = days.map { DayEntity(scheduleId = scheduleId, date = it.date.toEpochDay()) }
+        val dayIds = scheduleDao.insertDays(dayEntities)
+        val dayIdByDate = dayEntities.zip(dayIds).associate { (day, id) -> LocalDate.ofEpochDay(day.date) to id }
+        val lessons = days.flatMap { day ->
+            day.intervals.flatMapIndexed { slotIndex, slot ->
+                slot.lessons.mapIndexed { lessonIndex, lesson ->
+                    LessonEntity(
+                        dayId = dayIdByDate.getValue(day.date),
+                        date = day.date.toEpochDay(),
+                        slotIndex = slotIndex,
+                        start = slot.start.toMinutesOfDay(),
+                        end = slot.end.toMinutesOfDay(),
+                        lessonIndex = lessonIndex,
+                        raw = lesson.raw,
+                        room = lesson.room,
+                        groupName = lesson.group,
+                        subgroup = lesson.subgroup,
+                        subject = lesson.subject,
+                        type = lesson.type,
+                        teacher = lesson.teacher
+                    )
+                }
+            }
+        }
+        scheduleDao.insertLessons(lessons)
+    }
+
+    private fun buildSchedule(
+        schedules: List<ScheduleEntity>,
+        dayEntities: List<DayEntity>,
+        lessonEntities: List<LessonEntity>
+    ): Schedule? {
+        if (schedules.isEmpty()) return null
+        val groupId = schedules.first().groupId
+
+        val periods = schedules.sortedBy { it.weekStart }.map {
+            SchedulePeriod(
+                weekStart = LocalDate.ofEpochDay(it.weekStart),
+                weekEnd = LocalDate.ofEpochDay(it.weekEnd),
+                season = it.season
+            )
+        }
+
+        val lessonsByDay = lessonEntities.groupBy { it.dayId }
+        val days = dayEntities
+            .sortedBy { it.date }
+            .distinctBy { it.date }
+            .map { day ->
+                val lessons = lessonsByDay[day.id].orEmpty()
+                    .groupBy { it.slotIndex }
+                    .toSortedMap()
+                    .map { (_, slotLessons) ->
+                        TimeSlot(
+                            start = LocalTime.of(slotLessons.first().start / 60, slotLessons.first().start % 60),
+                            end = LocalTime.of(slotLessons.first().end / 60, slotLessons.first().end % 60),
+                            lessons = slotLessons
+                                .sortedBy { it.lessonIndex }
+                                .map { it.toDomain() }
+                        )
+                    }
+                Day(date = LocalDate.ofEpochDay(day.date), intervals = lessons)
+            }
+
+        return Schedule(groupId = groupId, periods = periods, days = days)
+    }
+
+    private fun LessonEntity.toDomain(): Lesson = Lesson(
+        raw = raw,
+        room = room,
+        group = groupName,
+        subgroup = subgroup,
+        subject = subject,
+        type = type,
+        teacher = teacher
+    )
+
+    private fun LocalTime.toMinutesOfDay(): Int = hour * 60 + minute
+
+    private fun now(): Long = System.currentTimeMillis()
+
+    companion object {
+        private const val STALE_WINDOW_MS = 12 * 60 * 60 * 1000L
+        private const val MAX_PERIODS = 24
+        private const val TAG = "ScheduleRepo"
+        private val RANGE_FMT = java.time.format.DateTimeFormatter.ofPattern("ddMMyyyy")
+    }
+}

app/src/main/java/agzam/vyatsu/data/repository/TeacherRepositoryImpl.kt

@@ -0,0 +1,86 @@
+package agzam.vyatsu.data.repository
+
+import agzam.vyatsu.data.local.DepartmentEntity
+import agzam.vyatsu.data.local.DepartmentPeriodEntity
+import agzam.vyatsu.data.local.TeacherDao
+import agzam.vyatsu.data.remote.TeachersParser
+import agzam.vyatsu.data.remote.VyatsuHttpClient
+import agzam.vyatsu.data.remote.VyatsuUrls
+import agzam.vyatsu.domain.ScheduleDates
+import agzam.vyatsu.domain.model.Department
+import agzam.vyatsu.domain.repository.TeacherRepository
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.withContext
+
+class TeacherRepositoryImpl(
+    private val teacherDao: TeacherDao,
+) : TeacherRepository {
+
+    override fun observeDepartments(): Flow<List<Department>> =
+        teacherDao.observeDepartments().map { list -> list.map { it.toDomain() } }
+
+    override suspend fun getDepartments(): List<Department> =
+        teacherDao.observeDepartments().first().map { it.toDomain() }
+
+    override suspend fun getFaculties(): List<String> = teacherDao.getFaculties()
+
+    override suspend fun refreshIfStale(): Boolean {
+        val last = teacherDao.maxSyncedAt()
+        if (last != null && now() - last < STALE_WINDOW_MS) {
+            return true
+        }
+        refresh()
+        return true
+    }
+
+    override suspend fun forceRefresh(): Boolean {
+        refresh()
+        return true
+    }
+
+    private suspend fun refresh() {
+        val parsed = withContext(Dispatchers.IO) {
+            VyatsuHttpClient.openStream(VyatsuUrls.TEACHER_PAGE).use(TeachersParser::parseStream)
+        }
+        val now = now()
+        teacherDao.insertAll(
+            parsed.departments.map { department ->
+                DepartmentEntity(
+                    departmentId = department.departmentId,
+                    name = department.name,
+                    faculty = department.faculty,
+                    lastSyncedAt = now
+                )
+            }
+        )
+        val periods = parsed.departments.flatMap { department ->
+            parsed.dateRanges[department.departmentId].orEmpty().flatMap { (season, ranges) ->
+                ranges.map { range ->
+                    DepartmentPeriodEntity(
+                        departmentId = department.departmentId,
+                        season = season,
+                        weekStart = ScheduleDates.asDate(range.first).toEpochDay(),
+                        weekEnd = ScheduleDates.asDate(range.second).toEpochDay()
+                    )
+                }
+            }
+        }
+        teacherDao.deleteAllPeriods()
+        teacherDao.insertPeriods(periods)
+    }
+
+    private fun now(): Long = System.currentTimeMillis()
+
+    private fun DepartmentEntity.toDomain(): Department = Department(
+        departmentId = departmentId,
+        name = name,
+        faculty = faculty
+    )
+
+    companion object {
+        private const val STALE_WINDOW_MS = 12 * 60 * 60 * 1000L
+    }
+}

app/src/main/java/agzam/vyatsu/data/repository/TeacherScheduleRepositoryImpl.kt

@@ -0,0 +1,294 @@
+package agzam.vyatsu.data.repository
+
+import agzam.vyatsu.data.local.DepartmentPeriodEntity
+import agzam.vyatsu.data.local.TeacherDao
+import agzam.vyatsu.data.local.TeacherDayEntity
+import agzam.vyatsu.data.local.TeacherLessonEntity
+import agzam.vyatsu.data.local.TeacherScheduleDao
+import agzam.vyatsu.data.local.TeacherScheduleEntity
+import agzam.vyatsu.data.remote.TeacherScheduleParser
+import agzam.vyatsu.data.remote.VyatsuHttpClient
+import agzam.vyatsu.data.remote.VyatsuUrls
+import agzam.vyatsu.domain.model.BulkSyncProgress
+import agzam.vyatsu.domain.model.DateRange
+import agzam.vyatsu.domain.model.Day
+import agzam.vyatsu.domain.model.Lesson
+import agzam.vyatsu.domain.model.SchedulePeriod
+import agzam.vyatsu.domain.model.Teacher
+import agzam.vyatsu.domain.model.TeacherSchedule
+import agzam.vyatsu.domain.model.TimeSlot
+import agzam.vyatsu.domain.repository.TeacherScheduleRepository
+import android.util.Log
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.Semaphore
+import kotlinx.coroutines.sync.withLock
+import kotlinx.coroutines.sync.withPermit
+import kotlinx.coroutines.withContext
+import java.time.DayOfWeek
+import java.time.LocalDate
+import java.time.LocalTime
+import java.time.temporal.TemporalAdjusters
+import kotlin.coroutines.cancellation.CancellationException
+
+class TeacherScheduleRepositoryImpl(
+    private val scheduleDao: TeacherScheduleDao,
+    private val teacherDao: TeacherDao
+) : TeacherScheduleRepository {
+
+    private val syncMutex = Mutex()
+
+    override fun observeSchedule(period: SchedulePeriod): Flow<TeacherSchedule?> =
+        combine(
+            scheduleDao.observeDaysForPeriod(period.season.name, period.weekStart.toEpochDay()),
+            scheduleDao.observeLessonsForPeriod(period.season.name, period.weekStart.toEpochDay())
+        ) { days, lessons ->
+            buildTeacherSchedule(period, days, lessons)
+        }
+
+    override fun observeTeachers(period: SchedulePeriod): Flow<List<Teacher>> =
+        scheduleDao.observeDistinctTeachers(period.season.name, period.weekStart.toEpochDay())
+            .map { names -> names.map { name -> Teacher(name = name) } }
+
+    override suspend fun syncPeriod(date: LocalDate): Flow<BulkSyncProgress> = flow {
+        // Unique index (departmentId, season, weekStart) breaks on interleaved
+        // delete+insert from concurrent syncPeriod() callers.
+        syncMutex.withLock {
+            val targets = withContext(Dispatchers.IO) {
+                teacherDao.getPeriodsForDate(date.toEpochDay())
+            }
+            if (targets.isEmpty()) {
+                emit(BulkSyncProgress(0, 0, 0))
+                return@withLock
+            }
+
+            targets.map { it.season to it.weekStart }
+                .distinct()
+                .forEach { (season, weekStart) ->
+                    withContext(Dispatchers.IO) {
+                        scheduleDao.deletePeriod(season.name, weekStart)
+                    }
+                }
+
+            val total = targets.size
+            val semaphore = Semaphore(PARALLELISM)
+            val jobs = coroutineScope {
+                targets.map { target ->
+                    async {
+                        semaphore.withPermit {
+                            try {
+                                withContext(Dispatchers.IO) { syncDepartment(target) }
+                                true
+                            } catch (e: CancellationException) {
+                                throw e
+                            } catch (e: Throwable) {
+                                Log.e(
+                                    TAG,
+                                    "sync: failed for department ${target.departmentId} " +
+                                        "season ${target.season} week ${target.weekStart} " +
+                                        "(${e::class.simpleName}: ${e.message})",
+                                    e
+                                )
+                                false
+                            }
+                        }
+                    }
+                }
+            }
+
+            var done = 0
+            var failed = 0
+            for (job in jobs) {
+                if (job.await()) done++ else failed++
+                emit(BulkSyncProgress(total, done + failed, failed))
+            }
+
+            withContext(Dispatchers.IO) { trimToRecent(keepDistinctPeriods = 2) }
+        }
+    }
+
+    override suspend fun hasData(period: SchedulePeriod): Boolean =
+        withContext(Dispatchers.IO) {
+            scheduleDao.hasSchedulesForPeriod(period.season.name, period.weekStart.toEpochDay())
+        }
+
+    override suspend fun weeksFor(date: LocalDate): List<SchedulePeriod> =
+        withContext(Dispatchers.IO) {
+            teacherDao.getPeriodsForDate(date.toEpochDay())
+                .distinctBy { it.season to (it.weekStart to it.weekEnd) }
+                .flatMap { window ->
+                    val windowStart = LocalDate.ofEpochDay(window.weekStart)
+                    val windowEnd = LocalDate.ofEpochDay(window.weekEnd)
+                    generateSequence(
+                        windowStart.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY))
+                    ) { it.plusWeeks(1) }
+                        .takeWhile { it <= windowEnd }
+                        .map { monday ->
+                            val weekEnd = monday.plusDays(6)
+                            SchedulePeriod(
+                                weekStart = monday,
+                                weekEnd = if (weekEnd.isAfter(windowEnd)) windowEnd else weekEnd,
+                                season = window.season
+                            )
+                        }
+                }
+                .distinctBy { it.season to it.weekStart }
+                .sortedBy { it.weekStart }
+        }
+
+    override suspend fun clearAll() = withContext(Dispatchers.IO) {
+        scheduleDao.deleteAll()
+    }
+
+    private suspend fun syncDepartment(target: DepartmentPeriodEntity) {
+        val season = target.season
+        val range = DateRange(
+            LocalDate.ofEpochDay(target.weekStart).format(RANGE_FMT),
+            LocalDate.ofEpochDay(target.weekEnd).format(RANGE_FMT)
+        )
+        val url = VyatsuUrls.teacherPrepodUrl(target.departmentId, season, range)
+        Log.d(TAG, "syncDepartment: dept=${target.departmentId} url=$url")
+        val html = VyatsuHttpClient.getBytes(url).toString(Charsets.UTF_8)
+        val parsed = TeacherScheduleParser.parse(html)
+
+        Log.d(TAG, "syncDepartment: dept=${target.departmentId} parsedDays=${parsed.days.size}")
+        parsed.days.forEach { day ->
+            day.intervals.forEach { slot ->
+                val mel = slot.lessons.filter { it.teacher == "Мельцов В.Ю." }
+                if (mel.isNotEmpty()) {
+                    Log.d(TAG, "syncDepartment: dept=${target.departmentId} date=${day.date} slot=${slot.start}-${slot.end} melLessons=${mel.size}")
+                }
+            }
+        }
+
+        val dayEntities = parsed.days.map {
+            TeacherDayEntity(scheduleId = 0, date = it.date.toEpochDay())
+        }
+        val lessonEntities = parsed.days.flatMap { day ->
+            day.intervals.flatMapIndexed { slotIndex, slot ->
+                slot.lessons.mapIndexedNotNull { lessonIndex, lesson ->
+                    val teacher = lesson.teacher ?: return@mapIndexedNotNull null
+                    TeacherLessonEntity(
+                        dayId = 0,
+                        date = day.date.toEpochDay(),
+                        slotIndex = slotIndex,
+                        start = slot.start.toMinutesOfDay(),
+                        end = slot.end.toMinutesOfDay(),
+                        lessonIndex = lessonIndex,
+                        raw = lesson.raw,
+                        room = lesson.room,
+                        groupName = lesson.group,
+                        subgroup = lesson.subgroup,
+                        subject = lesson.subject,
+                        type = lesson.type,
+                        teacher = teacher
+                    )
+                }
+            }
+        }
+        Log.d(TAG, "syncDepartment: dept=${target.departmentId} -> lessons=${lessonEntities.size}")
+        val melLessonEntities = lessonEntities.filter { it.teacher == "Мельцов В.Ю." }
+        melLessonEntities.forEach { le ->
+            Log.d(
+                TAG,
+                "syncDepartment: dept=${target.departmentId} MEL date=${le.date} slotIndex=${le.slotIndex} " +
+                    "start=$le.start end=$le.end raw=${le.raw}"
+            )
+        }
+        scheduleDao.replaceSchedule(
+            TeacherScheduleEntity(
+                departmentId = target.departmentId,
+                season = season,
+                weekStart = target.weekStart,
+                weekEnd = target.weekEnd,
+                lastSyncedAt = now()
+            ),
+            dayEntities,
+            lessonEntities
+        )
+    }
+
+    private suspend fun trimToRecent(keepDistinctPeriods: Int) {
+        val schedules = scheduleDao.getSchedules()
+        schedules
+            .map { it.season to it.weekStart }
+            .distinct()
+            .sortedByDescending { it.second }
+            .drop(keepDistinctPeriods)
+            .forEach { (season, weekStart) ->
+                scheduleDao.deletePeriod(season.name, weekStart)
+            }
+    }
+
+    private fun buildTeacherSchedule(
+        period: SchedulePeriod,
+        dayEntities: List<TeacherDayEntity>,
+        lessonEntities: List<TeacherLessonEntity>
+    ): TeacherSchedule? {
+        val weekDays = dayEntities
+            .filter {
+                it.date >= period.weekStart.toEpochDay() && it.date <= period.weekEnd.toEpochDay()
+            }
+        if (weekDays.isEmpty()) return null
+        val lessonsByDate = lessonEntities.groupBy { it.date }
+        val days = weekDays
+            .sortedBy { it.date }
+            .distinctBy { it.date }
+            .map { day ->
+                val lessons = lessonsByDate[day.date].orEmpty()
+                Log.d(
+                    TAG,
+                    "build: date=${day.date} totalLessons=${lessons.size} " +
+                        "groupedByStart=${lessons.groupBy { it.start }.keys.sorted()}"
+                )
+                val slots = lessons.groupBy { it.start }
+                    .toSortedMap()
+                    .map { (startMin, slotLessons) ->
+                        val first = slotLessons.first()
+                        val times = slotLessons.map { "${it.start}-${it.end}" }.distinct()
+                        val teachers = slotLessons.map { it.teacher }.distinct()
+                        Log.d(
+                            TAG,
+                            "build: date=${day.date} start=$startMin firstEnd=$first.end " +
+                                "times=$times teachers=$teachers"
+                        )
+                        TimeSlot(
+                            start = LocalTime.of(startMin / 60, startMin % 60),
+                            end = LocalTime.of(first.end / 60, first.end % 60),
+                            lessons = slotLessons
+                                .sortedBy { it.lessonIndex }
+                                .map { it.toDomain() }
+                        )
+                    }
+                Day(date = LocalDate.ofEpochDay(day.date), intervals = slots)
+            }
+        return TeacherSchedule(period = period, days = days)
+    }
+
+    private fun TeacherLessonEntity.toDomain(): Lesson = Lesson(
+        raw = raw,
+        room = room,
+        group = groupName,
+        subgroup = subgroup,
+        subject = subject,
+        type = type,
+        teacher = teacher
+    )
+
+    private fun LocalTime.toMinutesOfDay(): Int = hour * 60 + minute
+
+    private fun now(): Long = System.currentTimeMillis()
+
+    companion object {
+        private const val STALE_WINDOW_MS = 12 * 60 * 60 * 1000L
+        private const val PARALLELISM = 2
+        private const val TAG = "TeacherScheduleRepo"
+        private val RANGE_FMT = java.time.format.DateTimeFormatter.ofPattern("ddMMyyyy")
+    }
+}

app/src/main/java/agzam/vyatsu/data/static/Buildings.kt

@@ -0,0 +1,34 @@
+package agzam.vyatsu.data.static
+
+data class Building(
+    val number: Int,
+    val address: String,
+    val latitude: Double,
+    val longitude: Double
+)
+
+val BUILDINGS: List<Building> = listOf(
+    Building(1, "ул. Московская, д. 36", 58.602692, 49.666638),
+    Building(2, "ул. Московская, д. 39", 58.604297, 49.665926),
+    Building(3, "ул. Московская, д. 29", 58.604258, 49.673772),
+    Building(4, "ул. К.Либкнехта, д. 76 (1 корпус)", 58.602210, 49.665506),
+    Building(5, "ул. Карла Маркса, д. 77", 58.599995, 49.667861),
+    Building(6, "Студенческий проезд, д. 9", 58.605119, 49.618132),
+    Building(7, "ул. Преображенская, д. 32", 58.605315, 49.673662),
+    Building(8, "Студенческий проезд, д. 11", 58.604574, 49.618105),
+    Building(9, "Студенческий проезд, д. 11а", 58.604417, 49.617226),
+    Building(10, "ул. Ломоносова, д. 18а", 58.604644, 49.615911),
+    Building(11, "ул. Преображенская, д. 41", 58.605713, 49.670755),
+    Building(12, "ул. Ленина, д. 127", 58.586882, 49.681758),
+    Building(13, "ул. Красноармейская, д. 26", 58.591304, 49.676543),
+    Building(14, "ул. Ленина, д. 111", 58.591637, 49.680732),
+    Building(15, "ул. Ленина, д. 198", 58.567400, 49.686333),
+    Building(16, "ул. Свободы, д. 122", 58.591296, 49.678238),
+    Building(17, "ул. Ленина, д. 111а", 58.591030, 49.681094),
+    Building(18, "ул. Молодой Гвардии, д. 13", 58.598915, 49.687212),
+    Building(19, "ул. Орловская, д. 12", 58.596234, 49.687395),
+    Building(20, "ул. Ленина, д. 113", 58.590819, 49.681423),
+    Building(21, "ул. Ленина, д. 111а", 58.591030, 49.681094),
+    Building(22, "ул. Ленина, д. 111а", 58.591030, 49.681094),
+    Building(23, "ул. Володарского, д. 2", 58.616236, 49.671680)
+)

app/src/main/java/agzam/vyatsu/data/static/Calls.kt

@@ -0,0 +1,13 @@
+package agzam.vyatsu.data.static
+
+data class CallTime(val start: String, val end: String)
+
+val CALLS: List<CallTime> = listOf(
+    CallTime("8:20", "9:50"),
+    CallTime("10:00", "11:30"),
+    CallTime("11:45", "13:15"),
+    CallTime("14:00", "15:30"),
+    CallTime("15:45", "17:15"),
+    CallTime("17:20", "18:50"),
+    CallTime("18:55", "20:25")
+)

app/src/main/java/agzam/vyatsu/di/AppContainer.kt

@@ -0,0 +1,61 @@
+package agzam.vyatsu.di
+
+import agzam.vyatsu.data.local.AppDatabase
+import agzam.vyatsu.data.remote.GroupsParser
+import agzam.vyatsu.data.remote.VyatsuHttpClient
+import agzam.vyatsu.data.repository.GroupRepositoryImpl
+import agzam.vyatsu.data.repository.PreferencesRepositoryImpl
+import agzam.vyatsu.data.repository.ScheduleRepositoryImpl
+import agzam.vyatsu.data.repository.TeacherRepositoryImpl
+import agzam.vyatsu.data.repository.TeacherScheduleRepositoryImpl
+import agzam.vyatsu.domain.repository.GroupRepository
+import agzam.vyatsu.domain.repository.PreferencesRepository
+import agzam.vyatsu.domain.repository.ScheduleRepository
+import agzam.vyatsu.domain.repository.TeacherRepository
+import agzam.vyatsu.domain.repository.TeacherScheduleRepository
+import agzam.vyatsu.update.AppUpdater
+import android.content.Context
+import androidx.room.Room
+
+class AppContainer(context: Context) {
+    private val database: AppDatabase = Room.databaseBuilder(
+        context.applicationContext,
+        AppDatabase::class.java,
+        "vyatsu_schedule.db"
+    )
+        .addMigrations(AppDatabase.MIGRATION_3_4)
+        .fallbackToDestructiveMigration(dropAllTables = true)
+        .build()
+
+    val groupRepository: GroupRepository by lazy {
+        GroupRepositoryImpl(
+            groupDao = database.groupDao(),
+        )
+    }
+
+    val scheduleRepository: ScheduleRepository by lazy {
+        ScheduleRepositoryImpl(
+            scheduleDao = database.scheduleDao(),
+            groupDao = database.groupDao(),
+        )
+    }
+
+    val preferencesRepository: PreferencesRepository by lazy {
+        PreferencesRepositoryImpl(database.preferencesDao())
+    }
+
+    val teacherRepository: TeacherRepository by lazy {
+        TeacherRepositoryImpl(teacherDao = database.teacherDao())
+    }
+
+    val teacherScheduleRepository: TeacherScheduleRepository by lazy {
+        TeacherScheduleRepositoryImpl(
+            scheduleDao = database.teacherScheduleDao(),
+            teacherDao = database.teacherDao()
+        )
+    }
+
+    val appUpdater: AppUpdater by lazy {
+        AppUpdater(context.applicationContext, preferencesRepository)
+    }
+}

app/src/main/java/agzam/vyatsu/domain/ScheduleDates.kt

@@ -0,0 +1,39 @@
+package agzam.vyatsu.domain
+
+import agzam.vyatsu.domain.model.DateRange
+import agzam.vyatsu.domain.model.Season
+import java.time.LocalDate
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+import java.time.temporal.ChronoUnit
+import java.time.temporal.TemporalAdjusters
+
+object ScheduleDates {
+    private val zone: ZoneId = ZoneId.of("Europe/Moscow")
+    private val format: DateTimeFormatter = DateTimeFormatter.ofPattern("ddMMyyyy")
+
+    fun moscowToday(): LocalDate = LocalDate.now(zone)
+
+    fun asDate(dateStr: String): LocalDate = LocalDate.parse(dateStr, format)
+
+    fun dayIndexes(firstDate: String, today: LocalDate = moscowToday()): Pair<Int, Int> {
+        val begin = asDate(firstDate)
+        val anchor = begin.with(TemporalAdjusters.previousOrSame(java.time.DayOfWeek.MONDAY))
+        val diff = ChronoUnit.DAYS.between(anchor, today)
+
+        var week = Math.floorMod(diff / 7, 2)
+        var day = Math.floorMod(diff, 7)
+
+        if (day == 6) {
+            day = (day + 1) % 7
+            week = (week + 1) % 2
+        }
+        return week to day
+    }
+
+    fun dateByIndexes(firstDate: String, week: Int, day: Int): LocalDate =
+        asDate(firstDate).plusDays((week * 7 + day).toLong())
+
+    fun currentSeason(today: LocalDate = moscowToday()): Season =
+        if (today.monthValue in 8..12) Season.AUTUMN else Season.SPRING
+}

app/src/main/java/agzam/vyatsu/domain/model/BulkSyncProgress.kt

@@ -0,0 +1,7 @@
+package agzam.vyatsu.domain.model
+
+data class BulkSyncProgress(
+    val total: Int,
+    val done: Int,
+    val failed: Int
+)

app/src/main/java/agzam/vyatsu/domain/model/DateRange.kt

@@ -0,0 +1,6 @@
+package agzam.vyatsu.domain.model
+
+data class DateRange(
+    val first: String,
+    val second: String
+)

app/src/main/java/agzam/vyatsu/domain/model/Day.kt

@@ -0,0 +1,16 @@
+package agzam.vyatsu.domain.model
+
+import java.time.LocalDate
+
+/**
+ * День
+ * @author Agzam
+ */
+data class Day(
+
+    /** Дата, парсится из формата dd.mm.yy из PDF **/
+    val date: LocalDate,
+    /** Список пар **/
+    val intervals: List<TimeSlot>,
+
+)

app/src/main/java/agzam/vyatsu/domain/model/Department.kt

@@ -0,0 +1,11 @@
+package agzam.vyatsu.domain.model
+
+/**
+ * Кафедра ВятГУ.
+ * departmentId — идентификатор кафедры из data-kaf_period_id без последней цифры (как в URL).
+ */
+data class Department(
+    val departmentId: String,
+    val name: String,
+    val faculty: String
+)

app/src/main/java/agzam/vyatsu/domain/model/Group.kt

@@ -0,0 +1,11 @@
+package agzam.vyatsu.domain.model
+
+/**
+ * Группа студентов ВятГУ.
+ * id — идентификатор группы из data-grp_period_id без последней цифры (как в PDF URL).
+ */
+data class Group(
+    val id: String,
+    val name: String,
+    val faculty: String
+)

app/src/main/java/agzam/vyatsu/domain/model/Lesson.kt

@@ -0,0 +1,29 @@
+package agzam.vyatsu.domain.model
+
+/**
+ * Занятие
+ * @author Agzam
+ */
+data class Lesson(
+
+    /** Сырое значение из PDF **/
+    val raw: String,
+
+    /** Кабинет **/
+    val room: String? = null,
+
+    /** Группа, например ИВТб-3304-05-00 **/
+    val group: String? = null,
+    /** Подгруппа, например на физкультуре **/
+    val subgroup: String? = null,
+
+    /** Предмет **/
+    val subject: String? = null,
+
+    /** Тип, например лекция/практика **/
+    val type: LessonType = LessonType.OTHER,
+
+    /** Преподаватель **/
+    val teacher: String? = null,
+
+    )

app/src/main/java/agzam/vyatsu/domain/model/LessonType.kt

@@ -0,0 +1,18 @@
+package agzam.vyatsu.domain.model
+
+enum class LessonType(val label: String) {
+
+    LECTURE("Лекция"),
+    PRACTICE("Практическое занятие"),
+    LABORATORY("Лабораторная работа"),
+    OTHER("Занятие");
+
+    companion object {
+        fun fromRaw(raw: String): LessonType = when (raw.trim()) {
+            "Лекция" -> LECTURE
+            "Практическое занятие" -> PRACTICE
+            "Лабораторная работа" -> LABORATORY
+            else -> OTHER
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/domain/model/ParsedDepartments.kt

@@ -0,0 +1,6 @@
+package agzam.vyatsu.domain.model
+
+data class ParsedDepartments(
+    val departments: List<Department>,
+    val dateRanges: Map<String, Map<Season, List<DateRange>>>
+)

app/src/main/java/agzam/vyatsu/domain/model/Schedule.kt

@@ -0,0 +1,21 @@
+package agzam.vyatsu.domain.model
+
+import java.time.LocalDate
+
+data class SchedulePeriod(
+    val weekStart: LocalDate,
+    val weekEnd: LocalDate,
+    val season: Season
+)
+
+data class Schedule(
+    val groupId: String,
+    val periods: List<SchedulePeriod>,
+    val days: List<Day>
+) {
+    fun periodOf(date: LocalDate): SchedulePeriod? =
+        periods.firstOrNull { !date.isBefore(it.weekStart) && !date.isAfter(it.weekEnd) }
+
+    fun daysOf(period: SchedulePeriod): List<Day> =
+        days.filter { !it.date.isBefore(period.weekStart) && !it.date.isAfter(period.weekEnd) }
+}

app/src/main/java/agzam/vyatsu/domain/model/Season.kt

@@ -0,0 +1,11 @@
+package agzam.vyatsu.domain.model
+
+enum class Season {
+    AUTUMN, SPRING;
+
+    val apiKey: String
+        get() = when (this) {
+            AUTUMN -> "1"
+            SPRING -> "2"
+        }
+}

app/src/main/java/agzam/vyatsu/domain/model/Teacher.kt

@@ -0,0 +1,11 @@
+package agzam.vyatsu.domain.model
+
+/**
+ * Преподаватель ВятГУ.
+ * Один и тот же преподаватель может вести занятия в нескольких кафедрах,
+ * поэтому модель не привязана к departmentId — расписание агрегируется
+ * по всем кафедрам периода.
+ */
+data class Teacher(
+    val name: String
+)

app/src/main/java/agzam/vyatsu/domain/model/TeacherSchedule.kt

@@ -0,0 +1,57 @@
+package agzam.vyatsu.domain.model
+
+import java.time.LocalDate
+import java.time.LocalTime
+
+/**
+ * Расписание преподавателя за период, агрегированное по всем кафедрам.
+ */
+data class TeacherSchedule(
+    val period: SchedulePeriod,
+    val days: List<Day>
+) {
+    /**
+     * Возвращает дни периода только с занятиями указанного преподавателя.
+     * Слоты без занятий отбрасываются, порядок [Day] и [TimeSlot] сохраняется.
+     *
+     * Дедупликация — ТОЛЬКО по полному совпадению (дата + слот + аудитория +
+     * группа + предмет + тип + raw): два занятия коллапсируют в одно лишь когда
+     * они идентичны целиком (одно физическое занятие, прочитанное из файлов двух
+     * кафедр). Всё, что отличается хотя бы одним полем, остаётся и показывается.
+     */
+    fun daysForTeacher(teacherName: String): List<Day> =
+        days.mapNotNull { day ->
+            val seen = HashSet<FullMatchKey>()
+            val intervals = day.intervals.mapNotNull { slot ->
+                val lessons = slot.lessons
+                    .filter { it.teacher == teacherName }
+                    .filter {
+                        seen.add(
+                            FullMatchKey(
+                                date = day.date,
+                                start = slot.start,
+                                end = slot.end,
+                                room = it.room,
+                                group = it.group,
+                                subject = it.subject,
+                                type = it.type,
+                                raw = it.raw
+                            )
+                        )
+                    }
+                if (lessons.isEmpty()) null else slot.copy(lessons = lessons)
+            }
+            if (intervals.isEmpty()) null else day.copy(intervals = intervals)
+        }
+
+    private data class FullMatchKey(
+        val date: LocalDate,
+        val start: LocalTime,
+        val end: LocalTime,
+        val room: String?,
+        val group: String?,
+        val subject: String?,
+        val type: LessonType,
+        val raw: String
+    )
+}

app/src/main/java/agzam/vyatsu/domain/model/TimeSlot.kt

@@ -0,0 +1,17 @@
+package agzam.vyatsu.domain.model
+
+import java.time.LocalTime
+
+/**
+ * Временной промежуток/пара (например 08:20-09:30 из PDF)
+ *
+ * Может содержать несколько [Lesson], например для разделения на подгруппы
+ * @author Agzam
+ */
+data class TimeSlot(
+
+    val start: LocalTime,
+    val end: LocalTime,
+    val lessons: List<Lesson>
+
+)

app/src/main/java/agzam/vyatsu/domain/repository/GroupRepository.kt

@@ -0,0 +1,12 @@
+package agzam.vyatsu.domain.repository
+
+import agzam.vyatsu.domain.model.Group
+import kotlinx.coroutines.flow.Flow
+
+interface GroupRepository {
+    fun observeGroups(): Flow<List<Group>>
+    suspend fun getGroups(): List<Group>
+    suspend fun getFaculties(): List<String>
+    suspend fun refreshIfStale(): Boolean
+    suspend fun forceRefresh(): Boolean
+}

app/src/main/java/agzam/vyatsu/domain/repository/PreferencesRepository.kt

@@ -0,0 +1,25 @@
+package agzam.vyatsu.domain.repository
+
+interface PreferencesRepository {
+    suspend fun selectedGroupId(): String?
+    suspend fun setSelectedGroup(groupId: String)
+    suspend fun clearSelectedGroup()
+    suspend fun selectedWeekStart(): String?
+    suspend fun setSelectedWeekStart(weekStart: String)
+    suspend fun selectedDayDate(): String?
+    suspend fun setSelectedDayDate(date: String)
+
+    suspend fun selectedTeacherId(): String? = null
+    suspend fun setSelectedTeacherId(id: String) = Unit
+    suspend fun selectedTeacherWeekStart(): String? = null
+    suspend fun setSelectedTeacherWeekStart(weekStart: String) = Unit
+    suspend fun selectedTeacherDayDate(): String? = null
+    suspend fun setSelectedTeacherDayDate(date: String) = Unit
+    suspend fun clearSelectedTeacher() = Unit
+
+    suspend fun autoUpdateEnabled(): Boolean
+    suspend fun setAutoUpdateEnabled(enabled: Boolean)
+
+    suspend fun autoUpdateAsked(): Boolean
+    suspend fun setAutoUpdateAsked(asked: Boolean)
+}

app/src/main/java/agzam/vyatsu/domain/repository/ScheduleRepository.kt

@@ -0,0 +1,14 @@
+package agzam.vyatsu.domain.repository
+
+import agzam.vyatsu.domain.model.Schedule
+import agzam.vyatsu.domain.model.SchedulePeriod
+import kotlinx.coroutines.flow.Flow
+
+interface ScheduleRepository {
+    fun observeSchedule(groupId: String): Flow<Schedule?>
+    suspend fun getSchedule(groupId: String): Schedule?
+    suspend fun sync(groupId: String): Schedule?
+    suspend fun isStale(groupId: String): Boolean
+    suspend fun clearPeriod(groupId: String, period: SchedulePeriod)
+    suspend fun clearAll(groupId: String)
+}

app/src/main/java/agzam/vyatsu/domain/repository/TeacherRepository.kt

@@ -0,0 +1,12 @@
+package agzam.vyatsu.domain.repository
+
+import agzam.vyatsu.domain.model.Department
+import kotlinx.coroutines.flow.Flow
+
+interface TeacherRepository {
+    fun observeDepartments(): Flow<List<Department>>
+    suspend fun getDepartments(): List<Department>
+    suspend fun getFaculties(): List<String>
+    suspend fun refreshIfStale(): Boolean
+    suspend fun forceRefresh(): Boolean
+}

app/src/main/java/agzam/vyatsu/domain/repository/TeacherScheduleRepository.kt

@@ -0,0 +1,17 @@
+package agzam.vyatsu.domain.repository
+
+import agzam.vyatsu.domain.model.BulkSyncProgress
+import agzam.vyatsu.domain.model.SchedulePeriod
+import agzam.vyatsu.domain.model.Teacher
+import agzam.vyatsu.domain.model.TeacherSchedule
+import kotlinx.coroutines.flow.Flow
+import java.time.LocalDate
+
+interface TeacherScheduleRepository {
+    fun observeTeachers(period: SchedulePeriod): Flow<List<Teacher>>
+    fun observeSchedule(period: SchedulePeriod): Flow<TeacherSchedule?>
+    suspend fun syncPeriod(date: LocalDate): Flow<BulkSyncProgress>
+    suspend fun hasData(period: SchedulePeriod): Boolean
+    suspend fun weeksFor(date: LocalDate): List<SchedulePeriod>
+    suspend fun clearAll()
+}

app/src/main/java/agzam/vyatsu/ui/home/HomeScreen.kt

@@ -0,0 +1,93 @@
+package agzam.vyatsu.ui.home
+
+import agzam.vyatsu.ui.info.BuildingsScreen
+import agzam.vyatsu.ui.info.CallsScreen
+import agzam.vyatsu.ui.schedule.ScheduleScreen
+import agzam.vyatsu.ui.schedule.ScheduleViewModel
+import agzam.vyatsu.ui.settings.SettingsScreen
+import agzam.vyatsu.ui.settings.UpdateViewModel
+import agzam.vyatsu.ui.teacher.TeacherScheduleScreen
+import agzam.vyatsu.ui.teacher.TeacherScheduleViewModel
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.DateRange
+import androidx.compose.material.icons.filled.Home
+import androidx.compose.material.icons.filled.Info
+import androidx.compose.material.icons.filled.Settings
+import androidx.compose.material3.Icon
+import androidx.compose.material3.NavigationBar
+import androidx.compose.material3.NavigationBarItem
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+
+private enum class HomeTab(val label: String) {
+    SCHEDULE("Расписание"),
+    CALLS("Звонки"),
+    BUILDINGS("Корпуса"),
+    SETTINGS("Настройки")
+}
+
+@Composable
+fun HomeScreen(
+    scheduleViewModel: ScheduleViewModel,
+    teacherScheduleViewModel: TeacherScheduleViewModel,
+    updateViewModel: UpdateViewModel,
+    onSwitchGroup: () -> Unit,
+    onSwitchTeacher: () -> Unit
+) {
+    var tab by rememberSaveable { mutableStateOf(HomeTab.SCHEDULE) }
+    val teacherState by teacherScheduleViewModel.uiState.collectAsState()
+
+    Scaffold(
+        bottomBar = {
+            NavigationBar {
+                HomeTab.entries.forEach { t ->
+                    NavigationBarItem(
+                        selected = tab == t,
+                        onClick = { tab = t },
+                        icon = {
+                            Icon(
+                                imageVector = when (t) {
+                                    HomeTab.SCHEDULE -> Icons.Default.DateRange
+                                    HomeTab.CALLS -> Icons.Default.Info
+                                    HomeTab.BUILDINGS -> Icons.Default.Home
+                                    HomeTab.SETTINGS -> Icons.Default.Settings
+                                },
+                                contentDescription = t.label
+                            )
+                        },
+                        label = { Text(t.label) }
+                    )
+                }
+            }
+        }
+    ) { innerPadding ->
+        androidx.compose.foundation.layout.Box(
+            Modifier
+                .fillMaxSize()
+                .padding(innerPadding)
+        ) {
+            when (tab) {
+                HomeTab.SCHEDULE -> if (teacherState.teacherName != null) {
+                    TeacherScheduleScreen(
+                        viewModel = teacherScheduleViewModel,
+                        onSwitchTeacher = onSwitchTeacher
+                    )
+                } else {
+                    ScheduleScreen(viewModel = scheduleViewModel, onSwitchGroup = onSwitchGroup)
+                }
+                HomeTab.CALLS -> CallsScreen()
+                HomeTab.BUILDINGS -> BuildingsScreen()
+                HomeTab.SETTINGS -> SettingsScreen(viewModel = updateViewModel)
+            }
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/ui/info/BuildingsScreen.kt

@@ -0,0 +1,58 @@
+package agzam.vyatsu.ui.info
+
+import agzam.vyatsu.data.static.BUILDINGS
+import android.content.Intent
+import android.net.Uri
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.statusBars
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import agzam.vyatsu.BuildConfig
+
+@Composable
+fun BuildingsScreen() {
+    val context = LocalContext.current
+    LazyColumn(
+        Modifier
+            .fillMaxWidth()
+            .windowInsetsPadding(WindowInsets.statusBars)
+    ) {
+        items(BUILDINGS) { b ->
+            Column(
+                Modifier
+                    .fillMaxWidth()
+                    .clickable {
+                        val uri = Uri.parse("geo:${b.latitude},${b.longitude}?q=${b.latitude},${b.longitude}(Корпус ${b.number})")
+                        context.startActivity(Intent(Intent.ACTION_VIEW, uri))
+                    }
+                    .padding(horizontal = 16.dp, vertical = 12.dp)
+            ) {
+                Text(
+                    "Корпус ${b.number}",
+                    style = MaterialTheme.typography.bodyLarge
+                )
+                Text(
+                    b.address,
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+            HorizontalDivider(Modifier.padding(horizontal = 16.dp))
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/ui/info/CallsScreen.kt

@@ -0,0 +1,42 @@
+package agzam.vyatsu.ui.info
+
+import agzam.vyatsu.data.static.CALLS
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.statusBars
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun CallsScreen() {
+    LazyColumn(
+        Modifier
+            .fillMaxWidth()
+            .windowInsetsPadding(WindowInsets.statusBars)
+    ) {
+        itemsIndexed(CALLS) { index, call ->
+            Row(Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 12.dp)) {
+                Text(
+                    "${index + 1} пара",
+                    style = MaterialTheme.typography.bodyLarge,
+                    modifier = Modifier.weight(1f)
+                )
+                Text(
+                    "${call.start} – ${call.end}",
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+            HorizontalDivider(Modifier.padding(horizontal = 16.dp))
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/ui/picker/PickerScreen.kt

@@ -0,0 +1,336 @@
+package agzam.vyatsu.ui.picker
+
+import agzam.vyatsu.domain.model.Group
+import agzam.vyatsu.domain.model.Teacher
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.systemBars
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Clear
+import androidx.compose.material.icons.filled.Refresh
+import androidx.compose.material.icons.filled.Search
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.SearchBar
+import androidx.compose.material3.SearchBarDefaults
+import androidx.compose.material3.SegmentedButton
+import androidx.compose.material3.SegmentedButtonDefaults
+import androidx.compose.material3.SingleChoiceSegmentedButtonRow
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun PickerScreen(
+    viewModel: PickerViewModel,
+    onGroupPicked: (Group) -> Unit,
+    onTeacherPicked: (Teacher) -> Unit
+) {
+    val state by viewModel.uiState.collectAsState()
+    var segment by rememberSaveable { mutableStateOf(PickerSegment.GROUPS) }
+    LaunchedEffect(segment) { viewModel.selectSegment(segment) }
+
+    Scaffold { innerPadding ->
+        Column(
+            Modifier
+                .fillMaxSize()
+                .windowInsetsPadding(WindowInsets.systemBars)
+                .padding(innerPadding)
+                .padding(horizontal = 16.dp, vertical = 8.dp)
+        ) {
+            SingleChoiceSegmentedButtonRow(Modifier.fillMaxWidth()) {
+                SegmentedButton(
+                    selected = segment == PickerSegment.GROUPS,
+                    onClick = { segment = PickerSegment.GROUPS },
+                    shape = SegmentedButtonDefaults.itemShape(index = 0, count = 2)
+                ) {
+                    Text("Группы")
+                }
+                SegmentedButton(
+                    selected = segment == PickerSegment.TEACHERS,
+                    onClick = { segment = PickerSegment.TEACHERS },
+                    shape = SegmentedButtonDefaults.itemShape(index = 1, count = 2)
+                ) {
+                    Text("Преподаватели")
+                }
+            }
+
+            Spacer(Modifier.height(16.dp))
+
+            when (segment) {
+                PickerSegment.GROUPS -> GroupSection(
+                    state = state,
+                    onSearch = viewModel::searchGroup,
+                    onRetry = viewModel::retryGroups,
+                    onRefresh = viewModel::refreshGroups,
+                    onGroupPicked = onGroupPicked
+                )
+                PickerSegment.TEACHERS -> TeacherSection(
+                    state = state,
+                    onSearch = viewModel::searchTeacher,
+                    onRetry = viewModel::retryTeachers,
+                    onTeacherPicked = onTeacherPicked
+                )
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun GroupSection(
+    state: PickerUiState,
+    onSearch: (String) -> Unit,
+    onRetry: () -> Unit,
+    onRefresh: () -> Unit,
+    onGroupPicked: (Group) -> Unit
+) {
+    var isSearchActive by remember { mutableStateOf(false) }
+
+    if (!isSearchActive) {
+        Row(
+            Modifier
+                .fillMaxWidth()
+                .padding(bottom = 8.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = "Выберите группу",
+                style = MaterialTheme.typography.headlineSmall,
+                modifier = Modifier.weight(1f)
+            )
+            IconButton(onClick = onRefresh) {
+                Icon(Icons.Default.Refresh, contentDescription = "Обновить")
+            }
+        }
+    }
+
+    if (state.groupsLoading && state.groups.isEmpty()) {
+        Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.Center) {
+            CircularProgressIndicator()
+        }
+        return
+    }
+    if (state.error != null && state.groups.isEmpty()) {
+        Column(Modifier.fillMaxWidth()) {
+            Text(
+                state.error,
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.error
+            )
+            TextButton(onClick = onRetry) { Text("Повторить") }
+        }
+        return
+    }
+    SearchBar(
+        modifier = Modifier.fillMaxWidth(),
+        expanded = isSearchActive,
+        onExpandedChange = { isSearchActive = it },
+        inputField = {
+            SearchBarDefaults.InputField(
+                query = state.groupQuery,
+                onQueryChange = onSearch,
+                onSearch = { isSearchActive = false },
+                expanded = isSearchActive,
+                onExpandedChange = { isSearchActive = it },
+                placeholder = { Text("Поиск группы") },
+                leadingIcon = { Icon(Icons.Default.Search, contentDescription = null) },
+                trailingIcon = {
+                    if (isSearchActive && state.groupQuery.isNotEmpty()) {
+                        IconButton(onClick = { onSearch("") }) {
+                            Icon(Icons.Default.Clear, contentDescription = "Очистить")
+                        }
+                    }
+                }
+            )
+        }
+    ) {
+        GroupList(
+            groups = state.filteredGroups,
+            onPick = { group ->
+                isSearchActive = false
+                onGroupPicked(group)
+            }
+        )
+    }
+
+    if (!isSearchActive) {
+        Spacer(modifier = Modifier.height(8.dp))
+        GroupList(state.filteredGroups, onGroupPicked)
+    }
+}
+
+@Composable
+private fun GroupList(groups: List<Group>, onPick: (Group) -> Unit) {
+    LazyColumn(modifier = Modifier.fillMaxSize()) {
+        items(groups) { group ->
+            Column(modifier = Modifier.fillMaxWidth().clickable { onPick(group) }) {
+                Box(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 8.dp),
+                    contentAlignment = Alignment.CenterStart
+                ) {
+                    Text(group.name, style = MaterialTheme.typography.bodyMedium)
+                }
+            }
+            HorizontalDivider(thickness = 1.dp, color = MaterialTheme.colorScheme.outlineVariant)
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun TeacherSection(
+    state: PickerUiState,
+    onSearch: (String) -> Unit,
+    onRetry: () -> Unit,
+    onTeacherPicked: (Teacher) -> Unit
+) {
+    var isSearchActive by remember { mutableStateOf(false) }
+    val progress = state.syncProgress
+    val syncing = progress != null && progress.done < progress.total
+
+    if (!isSearchActive) {
+        Row(
+            Modifier
+                .fillMaxWidth()
+                .padding(bottom = 8.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = "Выберите преподавателя",
+                style = MaterialTheme.typography.headlineSmall,
+                modifier = Modifier.weight(1f)
+            )
+            IconButton(onClick = onRetry) {
+                Icon(Icons.Default.Refresh, contentDescription = "Обновить")
+            }
+        }
+    }
+
+    if (syncing) {
+        Column(Modifier.fillMaxWidth().padding(vertical = 8.dp)) {
+            LinearProgressIndicator(
+                progress = { progress.done / progress.total.toFloat() },
+                modifier = Modifier.fillMaxWidth()
+            )
+            Spacer(Modifier.height(4.dp))
+            Text(
+                text = "Кафедры: ${progress.done}/${progress.total}",
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+        }
+    }
+
+    if (state.teachersLoading && state.teachers.isEmpty() && !syncing) {
+        Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.Center) {
+            CircularProgressIndicator()
+        }
+        return
+    }
+    if (state.error != null && state.teachers.isEmpty() && !syncing) {
+        Column(Modifier.fillMaxWidth()) {
+            Text(
+                state.error,
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.error
+            )
+            TextButton(onClick = onRetry) { Text("Повторить") }
+        }
+        return
+    }
+    SearchBar(
+        modifier = Modifier.fillMaxWidth(),
+        expanded = isSearchActive,
+        onExpandedChange = { isSearchActive = it },
+        inputField = {
+            SearchBarDefaults.InputField(
+                query = state.teacherQuery,
+                onQueryChange = onSearch,
+                onSearch = { isSearchActive = false },
+                expanded = isSearchActive,
+                onExpandedChange = { isSearchActive = it },
+                placeholder = { Text("Поиск преподавателя") },
+                leadingIcon = { Icon(Icons.Default.Search, contentDescription = null) },
+                trailingIcon = {
+                    if (isSearchActive && state.teacherQuery.isNotEmpty()) {
+                        IconButton(onClick = { onSearch("") }) {
+                            Icon(Icons.Default.Clear, contentDescription = "Очистить")
+                        }
+                    }
+                }
+            )
+        }
+    ) {
+        TeacherList(
+            teachers = state.filteredTeachers,
+            onPick = { teacher ->
+                isSearchActive = false
+                onTeacherPicked(teacher)
+            }
+        )
+    }
+
+    if (!isSearchActive) {
+        Spacer(modifier = Modifier.height(8.dp))
+        when {
+            state.teachers.isEmpty() -> Text(
+                text = "Кафедры без расписания на эту неделю",
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
+            )
+            else -> TeacherList(state.filteredTeachers, onTeacherPicked)
+        }
+    }
+}
+
+@Composable
+private fun TeacherList(teachers: List<Teacher>, onPick: (Teacher) -> Unit) {
+    LazyColumn(modifier = Modifier.fillMaxSize()) {
+        items(teachers) { teacher ->
+            Column(modifier = Modifier.fillMaxWidth().clickable { onPick(teacher) }) {
+                Box(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 8.dp),
+                    contentAlignment = Alignment.CenterStart
+                ) {
+                    Text(teacher.name, style = MaterialTheme.typography.bodyMedium)
+                }
+            }
+            HorizontalDivider(thickness = 1.dp, color = MaterialTheme.colorScheme.outlineVariant)
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/ui/picker/PickerSegment.kt

@@ -0,0 +1,3 @@
+package agzam.vyatsu.ui.picker
+
+enum class PickerSegment { GROUPS, TEACHERS }

app/src/main/java/agzam/vyatsu/ui/picker/PickerViewModel.kt

@@ -0,0 +1,196 @@
+package agzam.vyatsu.ui.picker
+
+import agzam.vyatsu.domain.ScheduleDates
+import agzam.vyatsu.domain.model.BulkSyncProgress
+import agzam.vyatsu.domain.model.Group
+import agzam.vyatsu.domain.model.SchedulePeriod
+import agzam.vyatsu.domain.model.Teacher
+import agzam.vyatsu.domain.repository.GroupRepository
+import agzam.vyatsu.domain.repository.PreferencesRepository
+import agzam.vyatsu.domain.repository.TeacherRepository
+import agzam.vyatsu.domain.repository.TeacherScheduleRepository
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import java.time.DayOfWeek
+import java.time.temporal.TemporalAdjusters
+import kotlin.coroutines.cancellation.CancellationException
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+data class PickerUiState(
+    val segment: PickerSegment = PickerSegment.GROUPS,
+    val groups: List<Group> = emptyList(),
+    val groupQuery: String = "",
+    val filteredGroups: List<Group> = emptyList(),
+    val groupsLoading: Boolean = true,
+    val teachers: List<Teacher> = emptyList(),
+    val teacherQuery: String = "",
+    val filteredTeachers: List<Teacher> = emptyList(),
+    val teachersLoading: Boolean = true,
+    val syncProgress: BulkSyncProgress? = null,
+    val error: String? = null
+)
+
+class PickerViewModel(
+    private val groupRepository: GroupRepository,
+    private val teacherRepository: TeacherRepository,
+    private val teacherScheduleRepository: TeacherScheduleRepository,
+    private val preferencesRepository: PreferencesRepository
+) : ViewModel() {
+
+    private val _uiState = MutableStateFlow(PickerUiState())
+    val uiState: StateFlow<PickerUiState> = _uiState.asStateFlow()
+
+    private var teachersJob: kotlinx.coroutines.Job? = null
+    private var syncJob: kotlinx.coroutines.Job? = null
+
+    init {
+        groupsLoad()
+        teachersLoad()
+    }
+
+    fun selectSegment(segment: PickerSegment) {
+        _uiState.value = _uiState.value.copy(segment = segment)
+    }
+
+    private fun groupsLoad() {
+        viewModelScope.launch {
+            withContext(Dispatchers.IO) {
+                try {
+                    groupRepository.refreshIfStale()
+                } catch (e: Exception) {
+                    _uiState.value = _uiState.value.copy(
+                        error = e.message ?: "Не удалось загрузить группы"
+                    )
+                }
+            }
+            groupRepository.observeGroups().collect { groups ->
+                val query = _uiState.value.groupQuery
+                _uiState.value = _uiState.value.copy(
+                    groupsLoading = false,
+                    groups = groups,
+                    filteredGroups = filterGroups(groups, query),
+                    error = null
+                )
+            }
+        }
+    }
+
+    fun searchGroup(query: String) {
+        val groups = _uiState.value.groups
+        _uiState.value = _uiState.value.copy(
+            groupQuery = query,
+            filteredGroups = filterGroups(groups, query)
+        )
+    }
+
+    private fun filterGroups(groups: List<Group>, query: String): List<Group> {
+        if (query.isBlank()) return groups
+        val lowerQuery = query.lowercase()
+        return groups.filter { group ->
+            group.name.lowercase().contains(lowerQuery) || group.faculty.lowercase().contains(lowerQuery)
+        }
+    }
+
+    fun retryGroups() {
+        _uiState.value = _uiState.value.copy(groupsLoading = true, error = null)
+        groupsLoad()
+    }
+
+    fun refreshGroups() {
+        viewModelScope.launch {
+            withContext(Dispatchers.IO) {
+                try {
+                    groupRepository.forceRefresh()
+                } catch (e: Exception) {
+                    _uiState.value = _uiState.value.copy(
+                        error = e.message ?: "Не удалось обновить список групп"
+                    )
+                }
+            }
+        }
+    }
+
+    private fun teachersLoad() {
+        viewModelScope.launch {
+            withContext(Dispatchers.IO) {
+                try {
+                    teacherRepository.refreshIfStale()
+                } catch (e: Exception) {
+                    _uiState.value = _uiState.value.copy(
+                        error = e.message ?: "Не удалось загрузить кафедры"
+                    )
+                }
+            }
+            syncAndObserveTeachers()
+        }
+    }
+
+    private fun syncAndObserveTeachers() {
+        val today = ScheduleDates.moscowToday()
+        val weekStart = today.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY))
+        val period = SchedulePeriod(
+            weekStart = weekStart,
+            weekEnd = weekStart.plusDays(6),
+            season = ScheduleDates.currentSeason(today)
+        )
+
+        _uiState.value = _uiState.value.copy(syncProgress = null, teachersLoading = true)
+
+        syncJob?.cancel()
+        syncJob = viewModelScope.launch {
+            try {
+                teacherScheduleRepository.syncPeriod(today).collect { progress ->
+                    _uiState.value = _uiState.value.copy(syncProgress = progress)
+                }
+            } catch (e: CancellationException) {
+                throw e
+            } catch (e: Throwable) {
+                _uiState.value = _uiState.value.copy(
+                    error = e.message ?: "Не удалось загрузить расписание преподавателей"
+                )
+            } finally {
+                _uiState.value = _uiState.value.copy(teachersLoading = false)
+            }
+        }
+
+        teachersJob?.cancel()
+        teachersJob = viewModelScope.launch {
+            teacherScheduleRepository.observeTeachers(period)
+                .debounce(300)
+                .collect { teachers ->
+                    val query = _uiState.value.teacherQuery
+                    val isLoading = _uiState.value.teachersLoading
+                    _uiState.value = _uiState.value.copy(
+                        teachers = teachers,
+                        filteredTeachers = filterTeachers(teachers, query),
+                        teachersLoading = isLoading && teachers.isEmpty(),
+                        error = null
+                    )
+                }
+        }
+    }
+
+    fun searchTeacher(query: String) {
+        val teachers = _uiState.value.teachers
+        _uiState.value = _uiState.value.copy(
+            teacherQuery = query,
+            filteredTeachers = filterTeachers(teachers, query)
+        )
+    }
+
+    private fun filterTeachers(teachers: List<Teacher>, query: String): List<Teacher> {
+        if (query.isBlank()) return teachers
+        val lowerQuery = query.lowercase()
+        return teachers.filter { teacher -> teacher.name.lowercase().contains(lowerQuery) }
+    }
+
+    fun retryTeachers() {
+        syncAndObserveTeachers()
+    }
+}

app/src/main/java/agzam/vyatsu/ui/schedule/ScheduleScreen.kt

@@ -0,0 +1,189 @@
+package agzam.vyatsu.ui.schedule
+
+import agzam.vyatsu.ui.schedule.components.DayChips
+import agzam.vyatsu.ui.schedule.components.FULL_DATE
+import agzam.vyatsu.ui.schedule.components.LessonSlot
+import agzam.vyatsu.ui.schedule.components.WeekSelector
+import agzam.vyatsu.ui.schedule.components.dayName
+import agzam.vyatsu.ui.schedule.components.hPadding
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.pager.HorizontalPager
+import androidx.compose.foundation.pager.rememberPagerState
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Refresh
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.snapshotFlow
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ScheduleScreen(viewModel: ScheduleViewModel, onSwitchGroup: () -> Unit) {
+
+    val state by viewModel.uiState.collectAsState()
+
+    Column(Modifier.fillMaxSize()) {
+        TopAppBar(
+            title = { Text(state.groupName ?: "Расписание", style = MaterialTheme.typography.titleMedium) },
+            actions = {
+                if (state.isLoading && state.schedule != null) {
+                    CircularProgressIndicator(
+                        modifier = Modifier.size(24.dp),
+                        strokeWidth = 2.dp
+                    )
+                }
+                TextButton(onClick = { onSwitchGroup() }) {
+                    Text("Сменить группу")
+                }
+                IconButton(onClick = { viewModel.refresh() }) {
+                    Icon(Icons.Default.Refresh, contentDescription = "Обновить")
+                }
+            },
+            windowInsets = WindowInsets(0.dp)
+        )
+        Column(Modifier.fillMaxSize().padding(horizontal = 0.dp, vertical = 0.dp)) {
+            when {
+                state.schedule == null && state.loadError -> {
+                    Column(
+                        Modifier.fillMaxWidth(),
+                        horizontalAlignment = Alignment.CenterHorizontally
+                    ) {
+                        Text(
+                            "Не удалось загрузить расписание",
+                            style = MaterialTheme.typography.bodyLarge
+                        )
+                        TextButton(onClick = { viewModel.refresh() }) {
+                            Text("Повторить")
+                        }
+                    }
+                }
+
+                state.schedule == null -> {
+                    Row(
+                        Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.Center
+                    ) {
+                        CircularProgressIndicator()
+                    }
+                }
+
+                else -> {
+                    val schedule = state.schedule!!
+                    val weekDays = state.weekStart
+                        ?.let { ws -> schedule.periods.firstOrNull { it.weekStart == ws } }
+                        ?.let { schedule.daysOf(it) }
+                        .orEmpty()
+                    val day = schedule.days.firstOrNull { it.date == state.dayDate }
+
+                    if (day == null) {
+                        Text("Занятий нет", style = MaterialTheme.typography.bodyLarge)
+                    } else {
+
+                        val schedule = state.schedule!!
+                        val weekDays = state.weekStart
+                            ?.let { ws -> schedule.periods.firstOrNull { it.weekStart == ws } }
+                            ?.let { schedule.daysOf(it) }
+                            .orEmpty()
+
+                        val selectedDayIndex = weekDays.indexOfFirst { it.date == state.dayDate }.coerceAtLeast(0)
+                        val pagerState = rememberPagerState(
+                            initialPage = selectedDayIndex,
+                            pageCount = { weekDays.size }
+                        )
+                        LaunchedEffect(state.dayDate) {
+                            val targetPage = weekDays.indexOfFirst { it.date == state.dayDate }
+                            if (targetPage != -1 && targetPage != pagerState.currentPage) {
+                                pagerState.scrollToPage(targetPage) // Мгновенное переключение без анимации
+                            }
+                        }
+                        LaunchedEffect(pagerState) {
+                            snapshotFlow { pagerState.currentPage }.collect { page ->
+                                if (pagerState.isScrollInProgress && page in weekDays.indices) {
+                                    viewModel.selectDay(weekDays[page].date)
+                                }
+                            }
+                        }
+
+                        val isTodayDay = day.date == state.todayDate
+                        val dayLabel = if (isTodayDay) "Сегодня " else ""
+
+                        Row(
+                            Modifier.fillMaxWidth().padding(horizontal = hPadding),
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Text(
+                                "$dayLabel${dayName(day.date.dayOfWeek)} · ${day.date.format(FULL_DATE)}",
+                                style = MaterialTheme.typography.titleMedium,
+                                modifier = Modifier.weight(1f)
+                            )
+                            WeekSelector(
+                                periods = schedule.periods,
+                                selectedWeekStart = state.weekStart,
+                                todayWeekStart = state.todayDate?.let { schedule.periodOf(it)?.weekStart },
+                                onSelect = viewModel::selectWeek
+                            )
+                        }
+                        HorizontalDivider(Modifier.padding(top = 8.dp, bottom = 0.dp, start = hPadding, end = hPadding))
+
+                        DayChips(
+                            days = weekDays,
+                            selectedDate = state.dayDate,
+                            todayDate = state.todayDate,
+                            onSelect = viewModel::selectDay,
+                            pagerState = pagerState
+                        )
+
+                        HorizontalDivider(Modifier.padding(top=0.dp, start = hPadding, end = hPadding))
+
+                        HorizontalPager(state = pagerState, modifier = Modifier.weight(1f)) { page ->
+                            val day = weekDays.getOrNull(page)
+
+                            if (day == null || day.intervals.all { it.lessons.isEmpty() }) {
+                                Box(
+                                    modifier = Modifier.fillMaxSize(),
+                                    contentAlignment = Alignment.Center
+                                ) {
+                                    Text("Занятий нет", style = MaterialTheme.typography.bodyLarge)
+                                }
+                            } else {
+                                LazyColumn(
+                                    modifier = Modifier.fillMaxSize(),
+                                    verticalArrangement = Arrangement.spacedBy(8.dp),
+                                    contentPadding = PaddingValues(vertical = 8.dp)
+                                ) {
+                                    itemsIndexed(day.intervals) { slotIndex, slot ->
+                                        LessonSlot(slotIndex = slotIndex, slot = slot)
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/ui/schedule/ScheduleViewModel.kt

@@ -0,0 +1,197 @@
+package agzam.vyatsu.ui.schedule
+
+import agzam.vyatsu.domain.ScheduleDates
+import agzam.vyatsu.domain.model.Schedule
+import agzam.vyatsu.domain.repository.GroupRepository
+import agzam.vyatsu.domain.repository.PreferencesRepository
+import agzam.vyatsu.domain.repository.ScheduleRepository
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import java.time.LocalDate
+
+class ScheduleViewModel(
+    private val scheduleRepository: ScheduleRepository,
+    private val preferencesRepository: PreferencesRepository,
+    private val groupRepository: GroupRepository
+) : ViewModel() {
+
+    private val _uiState = MutableStateFlow(ScheduleUiState())
+    val uiState: StateFlow<ScheduleUiState> = _uiState.asStateFlow()
+
+    private var currentGroupId: String? = null
+
+    init {
+        viewModelScope.launch {
+            val groupId = preferencesRepository.selectedGroupId()
+            if (groupId != null) {
+                selectGroup(groupId)
+            } else {
+            _uiState.value = _uiState.value.copy(noGroup = true, groupName = null)
+            }
+        }
+    }
+
+    fun selectGroup(groupId: String) {
+        currentGroupId = groupId
+        _uiState.value = _uiState.value.copy(noGroup = false, isLoading = true, loadError = false)
+        viewModelScope.launch {
+            preferencesRepository.setSelectedGroup(groupId)
+            val groupName = groupRepository.getGroups().firstOrNull { it.id == groupId }?.name
+
+            val savedWeekStart = runCatching {
+                preferencesRepository.selectedWeekStart()?.let(LocalDate::parse)
+            }.getOrNull()
+            val savedDayDate = runCatching {
+                preferencesRepository.selectedDayDate()?.let(LocalDate::parse)
+            }.getOrNull()
+            _uiState.value = _uiState.value.copy(
+                noGroup = false,
+                groupName = groupName,
+                weekStart = savedWeekStart,
+                dayDate = savedDayDate
+            )
+
+            launch {
+                scheduleRepository.observeSchedule(groupId).collect { schedule ->
+                    currentGroupId?.let { applySchedule(schedule) }
+                }
+            }
+
+            launch {
+                syncIfMissing(groupId)
+            }
+        }
+    }
+
+    private suspend fun applySchedule(schedule: Schedule?) {
+        val current = _uiState.value
+        if (schedule == null || schedule.periods.isEmpty()) {
+            _uiState.value = current.copy(schedule = schedule, todayDate = null)
+            return
+        }
+        val today = ScheduleDates.moscowToday()
+        val todayDate = if (schedule.periodOf(today) != null) today else null
+
+        val weekStart = when {
+            schedule.periods.any { it.weekStart == current.weekStart } -> current.weekStart!!
+            todayDate != null -> schedule.periodOf(todayDate)!!.weekStart
+            else -> schedule.periods.first().weekStart
+        }
+        val period = schedule.periods.first { it.weekStart == weekStart }
+        val weekDays = schedule.daysOf(period)
+
+        val dayDate = when {
+            weekDays.any { it.date == current.dayDate } -> current.dayDate
+            weekDays.any { it.date == todayDate } -> todayDate
+            else -> weekDays.firstOrNull()?.date
+        }
+
+        preferencesRepository.setSelectedWeekStart(weekStart.toString())
+        dayDate?.let { preferencesRepository.setSelectedDayDate(it.toString()) }
+
+        _uiState.value = current.copy(
+            schedule = schedule,
+            weekStart = weekStart,
+            dayDate = dayDate,
+            todayDate = todayDate,
+            isLoading = false,
+            loadError = false
+        )
+    }
+
+    fun selectWeek(weekStart: LocalDate) {
+        val state = _uiState.value
+        val schedule = state.schedule ?: return
+        val period = schedule.periods.firstOrNull { it.weekStart == weekStart } ?: return
+        viewModelScope.launch {
+            val today = ScheduleDates.moscowToday()
+            val weekDays = schedule.daysOf(period)
+            val dayDate = when {
+                weekDays.any { it.date == today } -> today
+                else -> weekDays.firstOrNull()?.date
+            }
+            preferencesRepository.setSelectedWeekStart(weekStart.toString())
+            dayDate?.let { preferencesRepository.setSelectedDayDate(it.toString()) }
+            _uiState.value = _uiState.value.copy(weekStart = weekStart, dayDate = dayDate)
+        }
+    }
+
+    fun selectDay(date: LocalDate) {
+        val state = _uiState.value
+        val schedule = state.schedule ?: return
+        val period = schedule.periodOf(date) ?: return
+        viewModelScope.launch {
+            preferencesRepository.setSelectedWeekStart(period.weekStart.toString())
+            preferencesRepository.setSelectedDayDate(date.toString())
+            _uiState.value = _uiState.value.copy(weekStart = period.weekStart, dayDate = date)
+        }
+    }
+
+    private suspend fun syncIfMissing(groupId: String) {
+        if (scheduleRepository.getSchedule(groupId) != null) {
+            _uiState.value = _uiState.value.copy(isLoading = false)
+            return
+        }
+        loadSchedule(groupId)
+    }
+
+    private suspend fun loadSchedule(groupId: String) {
+        _uiState.value = _uiState.value.copy(isLoading = true, loadError = false)
+        val schedule = scheduleRepository.sync(groupId)
+        _uiState.value = if (schedule != null) {
+            _uiState.value.copy(isLoading = false, loadError = false)
+        } else {
+            _uiState.value.copy(isLoading = false, loadError = true)
+        }
+    }
+
+    fun switchGroup() {
+        viewModelScope.launch {
+            currentGroupId = null
+            preferencesRepository.clearSelectedGroup()
+            _uiState.value = _uiState.value.copy(noGroup = true, isLoading = false, loadError = false)
+        }
+    }
+
+    fun refresh() {
+        val groupId = currentGroupId ?: return
+        viewModelScope.launch {
+            _uiState.value = _uiState.value.copy(isLoading = true, loadError = false)
+            // Обновляем список групп: так подхватываются новые PDF (периоды), появившиеся на сайте.
+            runCatching { groupRepository.forceRefresh() }
+            loadSchedule(groupId)
+        }
+    }
+
+    fun clearAll() {
+        val groupId = currentGroupId ?: return
+        viewModelScope.launch {
+            scheduleRepository.clearAll(groupId)
+        }
+    }
+
+    fun clearSelectedPeriod() {
+        val state = _uiState.value
+        val schedule = state.schedule ?: return
+        val weekStart = state.weekStart ?: return
+        val period = schedule.periods.firstOrNull { it.weekStart == weekStart } ?: return
+        viewModelScope.launch {
+            scheduleRepository.clearPeriod(schedule.groupId, period)
+        }
+    }
+}
+
+data class ScheduleUiState(
+    val noGroup: Boolean = false,
+    val isLoading: Boolean = false,
+    val loadError: Boolean = false,
+    val schedule: Schedule? = null,
+    val groupName: String? = null,
+    val weekStart: LocalDate? = null,
+    val dayDate: LocalDate? = null,
+    val todayDate: LocalDate? = null
+)

app/src/main/java/agzam/vyatsu/ui/schedule/components/DayChips.kt

@@ -0,0 +1,133 @@
+package agzam.vyatsu.ui.schedule.components
+
+import agzam.vyatsu.domain.model.Day
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyListItemInfo
+import androidx.compose.foundation.lazy.LazyListLayoutInfo
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.pager.PagerState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.FilterChipDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.snapshotFlow
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.flow.collectLatest
+import java.time.LocalDate
+import kotlin.math.max
+import kotlin.math.min
+
+internal fun getVisiblePercentage(item: LazyListItemInfo, layoutInfo: LazyListLayoutInfo): Float {
+    val viewportStart = layoutInfo.viewportStartOffset
+    val viewportEnd = layoutInfo.viewportEndOffset
+
+    val itemStart = item.offset
+    val itemEnd = item.offset + item.size
+
+    val visibleStart = max(itemStart, viewportStart)
+    val visibleEnd = min(itemEnd, viewportEnd)
+    val visibleSize = visibleEnd - visibleStart
+
+    return if (visibleSize <= 0) 0f else visibleSize.toFloat() / item.size
+}
+
+@Composable
+internal fun DayChips(
+    days: List<Day>,
+    selectedDate: LocalDate?,
+    todayDate: LocalDate?,
+    pagerState: PagerState,
+    onSelect: (LocalDate) -> Unit
+) {
+    val listState = rememberLazyListState()
+
+    val density = LocalDensity.current
+
+    val paddingPx = with(density) { hPadding.toPx() }
+
+
+    LaunchedEffect(pagerState, days) {
+        snapshotFlow {
+            pagerState.currentPage
+        }.collectLatest { targetPage ->
+
+            if (targetPage in days.indices) {
+                val layoutInfo = listState.layoutInfo
+                val visibleItems = layoutInfo.visibleItemsInfo
+                val targetItem = visibleItems.firstOrNull { it.index == targetPage }
+
+                if (targetItem != null) {
+                    val visiblePercentage = getVisiblePercentage(targetItem, layoutInfo)
+                    val minVisibleThreshold = 0.9f
+
+                    if (visiblePercentage < minVisibleThreshold) {
+                        val viewPortWidth = layoutInfo.viewportEndOffset - layoutInfo.viewportStartOffset
+                        val halfViewport = viewPortWidth / 2f
+                        val centerOffset = (halfViewport - (targetItem.size / 2f) - paddingPx).toInt()
+
+                        listState.animateScrollToItem(index = targetPage, scrollOffset = -centerOffset)
+                    }
+                } else {
+                    val viewPortWidth = layoutInfo.viewportEndOffset - layoutInfo.viewportStartOffset
+                    val halfViewport = viewPortWidth / 2f
+
+                    val averageSize = visibleItems.map { it.size }.average().toInt().coerceAtLeast(150)
+                    val centerOffset = (halfViewport - (averageSize / 2f) - paddingPx).toInt()
+
+                    listState.animateScrollToItem(index = targetPage, scrollOffset = -centerOffset)
+                }
+            }
+        }
+    }
+
+    LazyRow(state = listState, horizontalArrangement = Arrangement.spacedBy(6.dp), contentPadding = PaddingValues(horizontal = hPadding, vertical = 2.dp),) {
+        items(days, key = { it.date.toEpochDay() }) { day ->
+            val selected = selectedDate == day.date
+            val isTodayChip = todayDate == day.date
+            FilterChip(
+                selected = selected,
+                onClick = { onSelect(day.date) },
+                label = {
+                    Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                        Text(
+                            dayName(day.date.dayOfWeek),
+                            style = MaterialTheme.typography.labelMedium
+                        )
+                        Text(
+                            day.date.format(CHIP_DATE),
+                            style = MaterialTheme.typography.labelSmall,
+                            color = if (selected) {
+                                MaterialTheme.colorScheme.onSecondaryContainer
+                            } else {
+                                MaterialTheme.colorScheme.onSurfaceVariant
+                            }
+                        )
+                    }
+                },
+                modifier = Modifier.padding(vertical = 2.dp),
+                border = if (isTodayChip && !selected) {
+                    FilterChipDefaults.filterChipBorder(
+                        borderColor = MaterialTheme.colorScheme.primary,
+                        borderWidth = 1.dp,
+                        enabled = true,
+                        selected = false
+                    )
+                } else {
+                    FilterChipDefaults.filterChipBorder(enabled = true, selected = selected)
+                },
+                shape = RoundedCornerShape(8.dp)
+            )
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/ui/schedule/components/LessonSlot.kt

@@ -0,0 +1,118 @@
+package agzam.vyatsu.ui.schedule.components
+
+import agzam.vyatsu.domain.model.LessonType
+import agzam.vyatsu.domain.model.TimeSlot
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.text.selection.SelectionContainer
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+
+@Composable
+internal fun LessonSlot(slotIndex: Int, slot: TimeSlot, showTeacher: Boolean = true) {
+    val context = LocalContext.current
+    var indexColor = 0
+    Column(Modifier.fillMaxWidth()) {
+        Row(modifier = Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
+            HorizontalDivider(
+                modifier = Modifier.width(10.dp + hPadding).padding(start = hPadding),
+                color = MaterialTheme.colorScheme.primary
+            )
+            Text(
+                "${slotIndex + 1} пара · ${slot.start.format(TIME)}–${slot.end.format(TIME)}",
+                style = MaterialTheme.typography.labelMedium,
+                color = MaterialTheme.colorScheme.primary,
+                modifier = Modifier.padding(horizontal = 4.dp)
+            )
+            HorizontalDivider(color = MaterialTheme.colorScheme.primary, modifier = Modifier.weight(1f).padding(end = hPadding))
+        }
+        if (slot.lessons.isEmpty()) {
+            Text("—", style = MaterialTheme.typography.bodyMedium)
+        } else {
+            slot.lessons.forEachIndexed { index, lesson ->
+                var baseSurface = Modifier.fillMaxWidth().padding(vertical = 2.dp)
+                if ((indexColor) % 2 != 0) {
+                    baseSurface = baseSurface.background(
+                        MaterialTheme.colorScheme.surfaceContainer
+                    );
+                }
+                indexColor++
+                // XXX:
+                // Убрать SelectionContainer?
+                // Режим редактирования расписания?
+                // Меню на onClick?
+                // Меню на onLongClick?
+                SelectionContainer() {
+                    Column(
+                        baseSurface
+                        // XXX: combinedClickable?
+                        //.combinedClickable(
+                        //    onClick = {
+                        //        Toast.makeText(
+                        //            context,
+                        //            lesson.raw,
+                        //            Toast.LENGTH_SHORT
+                        //        ).show()
+                        //    },
+                        //    onLongClick = {},
+                        //    // TODO: onLongClickLabel = "(Accessibility)"
+                        //),
+                    ) {
+                        var any = false
+
+                        val meta = listOfNotNull(
+                            if (lesson.type == LessonType.OTHER) {
+                                null
+                            } else {
+                                lesson.type.label
+                            },
+                            lesson.subgroup,
+                            if (showTeacher) lesson.teacher else lesson.group,
+                            lesson.room
+                        ).filter { it.isNotBlank() }.joinToString(" · ")
+
+                        if (meta.isNotEmpty()) {
+                            Text(
+                                meta,
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                modifier = Modifier.padding(horizontal = hPadding)
+                            )
+                            any = true
+                        }
+
+                        val subject = lesson.subject?.takeIf { it.isNotBlank() } ?: lesson.raw
+                        if (subject.isNotEmpty()) {
+                            Text(
+                                subject,
+                                style = MaterialTheme.typography.bodyLarge,
+                                modifier = Modifier.padding(horizontal = hPadding)
+                            )
+                            any = true
+                        }
+
+                        if (!any) {
+                            Text(
+                                "пусто",
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                modifier = Modifier.padding(horizontal = hPadding)
+                            )
+                        }
+
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/ui/schedule/components/ScheduleUi.kt

@@ -0,0 +1,21 @@
+package agzam.vyatsu.ui.schedule.components
+
+import androidx.compose.ui.unit.dp
+import java.time.DayOfWeek
+import java.time.format.DateTimeFormatter
+
+internal val hPadding = 16.dp
+
+internal fun dayName(dayOfWeek: DayOfWeek): String = when (dayOfWeek) {
+    DayOfWeek.MONDAY -> "Пн"
+    DayOfWeek.TUESDAY -> "Вт"
+    DayOfWeek.WEDNESDAY -> "Ср"
+    DayOfWeek.THURSDAY -> "Чт"
+    DayOfWeek.FRIDAY -> "Пт"
+    DayOfWeek.SATURDAY -> "Сб"
+    DayOfWeek.SUNDAY -> "Вс"
+}
+
+internal val FULL_DATE: DateTimeFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy")
+internal val CHIP_DATE: DateTimeFormatter = DateTimeFormatter.ofPattern("dd.MM")
+internal val TIME: DateTimeFormatter = DateTimeFormatter.ofPattern("HH:mm")

app/src/main/java/agzam/vyatsu/ui/schedule/components/WeekSelector.kt

@@ -0,0 +1,96 @@
+package agzam.vyatsu.ui.schedule.components
+
+import agzam.vyatsu.domain.model.SchedulePeriod
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowDropDown
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.unit.dp
+import java.time.LocalDate
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+internal fun WeekSelector(
+    periods: List<SchedulePeriod>,
+    selectedWeekStart: LocalDate?,
+    todayWeekStart: LocalDate?,
+    onSelect: (LocalDate) -> Unit
+) {
+    val selected = periods.firstOrNull { it.weekStart == selectedWeekStart }
+    var expanded by remember { mutableStateOf(false) }
+
+    Box {
+        Row(
+            modifier = Modifier
+                .clip(MaterialTheme.shapes.small)
+                .clickable(enabled = true, onClick = { expanded = true })
+                .padding(horizontal = 10.dp, vertical = 8.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                selected?.let(::weekLabel) ?: "Период",
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Icon(
+                imageVector = Icons.Default.ArrowDropDown,
+                contentDescription = null,
+                tint = MaterialTheme.colorScheme.primary
+            )
+        }
+        DropdownMenu(
+            expanded = expanded,
+            onDismissRequest = { expanded = false },
+            modifier = Modifier.widthIn(min = 220.dp)
+        ) {
+            periods.forEach { period ->
+                val isTodayWeek = todayWeekStart == period.weekStart
+                DropdownMenuItem(
+                    text = {
+                        Text(
+                            weekLabel(period),
+                            style = MaterialTheme.typography.bodyLarge
+                        )
+                    },
+                    trailingIcon = if (isTodayWeek) {
+                        {
+                            Text(
+                                "сегодня",
+                                style = MaterialTheme.typography.labelMedium,
+                                color = MaterialTheme.colorScheme.primary
+                            )
+                        }
+                    } else {
+                        null
+                    },
+                    onClick = {
+                        expanded = false
+                        onSelect(period.weekStart)
+                    }
+                )
+            }
+        }
+    }
+}
+
+internal fun weekLabel(period: SchedulePeriod): String {
+    val first = period.weekStart
+    return "с ${first.format(CHIP_DATE)}"
+}

app/src/main/java/agzam/vyatsu/ui/settings/SettingsScreen.kt

@@ -0,0 +1,152 @@
+package agzam.vyatsu.ui.settings
+
+import agzam.vyatsu.BuildConfig
+import agzam.vyatsu.update.UpdateState
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.statusBars
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Switch
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun SettingsScreen(viewModel: UpdateViewModel) {
+    val autoEnabled by viewModel.autoEnabled.collectAsState()
+    val updateState by viewModel.updateState.collectAsState()
+
+    LazyColumn(
+        Modifier
+            .fillMaxWidth()
+            .windowInsetsPadding(WindowInsets.statusBars)
+    ) {
+        item { SectionHeader("Обновления") }
+        item {
+            SettingsItem(
+                title = "Автоматические обновления",
+                subtitle = "Проверять и устанавливать новые версии при запуске",
+                trailing = {
+                    Switch(
+                        checked = autoEnabled,
+                        onCheckedChange = { viewModel.setAutoEnabled(it) }
+                    )
+                }
+            )
+            SettingsDivider()
+        }
+        item {
+            SettingsItem(
+                title = "Проверить наличие обновлений",
+                subtitle = updateStatusText(updateState, autoEnabled),
+                onClick = { viewModel.checkNow() }
+            )
+            SettingsDivider()
+        }
+        if (autoEnabled && (updateState is UpdateState.Available || updateState is UpdateState.ReadyToInstall)) {
+            item {
+                SettingsItem(
+                    title = "Установить обновление",
+                    subtitle = installHint(updateState, viewModel),
+                    onClick = {
+                        when (updateState) {
+                            is UpdateState.Available -> viewModel.downloadAndInstall()
+                            is UpdateState.ReadyToInstall -> viewModel.installDownloadedApk()
+                            else -> {}
+                        }
+                    }
+                )
+                SettingsDivider()
+            }
+        }
+
+        item { SectionHeader("О приложении") }
+        item {
+            SettingsItem(
+                title = "Версия",
+                trailing = {
+                    Text(
+                        BuildConfig.VERSION_NAME,
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            )
+            SettingsDivider()
+        }
+    }
+}
+
+private fun updateStatusText(state: UpdateState, autoEnabled: Boolean): String = when (state) {
+    is UpdateState.Idle -> "Проверить сейчас"
+    is UpdateState.Checking -> "Проверка…"
+    is UpdateState.UpToDate -> "Установлена последняя версия"
+    is UpdateState.Available ->
+        if (autoEnabled) "Доступна версия ${state.version}"
+        else "Доступна версия ${state.version} — включите автообновления для установки"
+    is UpdateState.Downloading -> "Скачивание: ${state.progress?.let { "$it%" } ?: "…"}"
+    is UpdateState.ReadyToInstall -> "Обновление скачано, нажмите для установки"
+    is UpdateState.Failed -> "Ошибка: ${state.message}"
+}
+
+private fun installHint(state: UpdateState, viewModel: UpdateViewModel): String = when {
+    state is UpdateState.ReadyToInstall && !viewModel.canRequestInstalls() ->
+        "Разрешите установку приложений из этого источника"
+    else -> "Нажмите, чтобы продолжить"
+}
+
+@Composable
+private fun SectionHeader(title: String) {
+    Text(
+        title,
+        style = MaterialTheme.typography.titleSmall,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+        modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
+    )
+}
+
+@Composable
+private fun SettingsItem(
+    title: String,
+    subtitle: String? = null,
+    trailing: (@Composable () -> Unit)? = null,
+    onClick: (() -> Unit)? = null
+) {
+    Row(
+        Modifier
+            .fillMaxWidth()
+            .heightIn(min = 48.dp)
+            .then(if (onClick != null) Modifier.clickable(onClick = onClick) else Modifier)
+            .padding(horizontal = 16.dp, vertical = 12.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Column(Modifier.weight(1f)) {
+            Text(title, style = MaterialTheme.typography.bodyLarge)
+            if (subtitle != null) {
+                Text(
+                    subtitle,
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+        }
+        trailing?.invoke()
+    }
+}
+
+@Composable
+private fun SettingsDivider() {
+    HorizontalDivider(Modifier.padding(horizontal = 16.dp))
+}

app/src/main/java/agzam/vyatsu/ui/settings/UpdateViewModel.kt

@@ -0,0 +1,58 @@
+package agzam.vyatsu.ui.settings
+
+import agzam.vyatsu.domain.repository.PreferencesRepository
+import agzam.vyatsu.update.AppUpdater
+import agzam.vyatsu.update.UpdateState
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+
+class UpdateViewModel(
+    private val updater: AppUpdater,
+    private val preferencesRepository: PreferencesRepository
+) : ViewModel() {
+
+    val updateState: StateFlow<UpdateState> = updater.state
+
+    private val _autoEnabled = MutableStateFlow(false)
+    val autoEnabled: StateFlow<Boolean> = _autoEnabled.asStateFlow()
+
+    private val _showFirstRunDialog = MutableStateFlow(false)
+    val showFirstRunDialog: StateFlow<Boolean> = _showFirstRunDialog.asStateFlow()
+
+    init {
+        viewModelScope.launch {
+            _autoEnabled.value = preferencesRepository.autoUpdateEnabled()
+            _showFirstRunDialog.value = !preferencesRepository.autoUpdateAsked()
+        }
+    }
+
+    fun setAutoEnabled(enabled: Boolean) {
+        _autoEnabled.value = enabled
+        updater.setAutoEnabled(enabled)
+        if (enabled && !updater.canRequestInstalls()) {
+            updater.openUnknownSourcesSettings()
+        }
+    }
+
+    fun onFirstRunDecision(enable: Boolean) {
+        _showFirstRunDialog.value = false
+        viewModelScope.launch {
+            preferencesRepository.setAutoUpdateAsked(true)
+        }
+        setAutoEnabled(enable)
+    }
+
+    fun checkNow() = updater.checkForUpdate()
+
+    fun downloadAndInstall() = updater.downloadAndInstall()
+
+    fun installDownloadedApk() = updater.installDownloadedApk()
+
+    fun canRequestInstalls() = updater.canRequestInstalls()
+
+    fun openUnknownSourcesSettings() = updater.openUnknownSourcesSettings()
+}

app/src/main/java/agzam/vyatsu/ui/teacher/TeacherScheduleScreen.kt

@@ -0,0 +1,188 @@
+package agzam.vyatsu.ui.teacher
+
+import agzam.vyatsu.ui.schedule.components.DayChips
+import agzam.vyatsu.ui.schedule.components.FULL_DATE
+import agzam.vyatsu.ui.schedule.components.LessonSlot
+import agzam.vyatsu.ui.schedule.components.WeekSelector
+import agzam.vyatsu.ui.schedule.components.dayName
+import agzam.vyatsu.ui.schedule.components.hPadding
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.pager.HorizontalPager
+import androidx.compose.foundation.pager.rememberPagerState
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Refresh
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.snapshotFlow
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun TeacherScheduleScreen(viewModel: TeacherScheduleViewModel, onSwitchTeacher: () -> Unit) {
+
+    val state by viewModel.uiState.collectAsState()
+
+    Column(Modifier.fillMaxSize()) {
+        TopAppBar(
+            title = { Text(state.teacherName ?: "Расписание преподавателя", style = MaterialTheme.typography.titleMedium) },
+            actions = {
+                if (state.isLoading && state.schedule != null) {
+                    CircularProgressIndicator(
+                        modifier = Modifier.size(24.dp),
+                        strokeWidth = 2.dp
+                    )
+                }
+                TextButton(onClick = { onSwitchTeacher() }) {
+                    Text("Сменить преподавателя")
+                }
+                IconButton(onClick = { viewModel.refresh() }) {
+                    Icon(Icons.Default.Refresh, contentDescription = "Обновить")
+                }
+            },
+            windowInsets = WindowInsets(0.dp)
+        )
+        Column(Modifier.fillMaxSize().padding(horizontal = 0.dp, vertical = 0.dp)) {
+            when {
+                state.schedule == null && state.loadError -> {
+                    Column(
+                        Modifier.fillMaxWidth(),
+                        horizontalAlignment = Alignment.CenterHorizontally
+                    ) {
+                        Text(
+                            "Не удалось загрузить расписание",
+                            style = MaterialTheme.typography.bodyLarge
+                        )
+                        TextButton(onClick = { viewModel.refresh() }) {
+                            Text("Повторить")
+                        }
+                    }
+                }
+
+                state.schedule == null -> {
+                    Row(
+                        Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.Center
+                    ) {
+                        CircularProgressIndicator()
+                    }
+                }
+
+                else -> {
+                    val schedule = state.schedule!!
+                    val weekDays = schedule.days
+                    val day = weekDays.firstOrNull { it.date == state.dayDate }
+
+                    if (day == null) {
+                        Text("Занятий нет", style = MaterialTheme.typography.bodyLarge)
+                    } else {
+
+                        val selectedDayIndex = weekDays.indexOfFirst { it.date == state.dayDate }.coerceAtLeast(0)
+                        val pagerState = rememberPagerState(
+                            initialPage = selectedDayIndex,
+                            pageCount = { weekDays.size }
+                        )
+                        LaunchedEffect(state.dayDate) {
+                            val targetPage = weekDays.indexOfFirst { it.date == state.dayDate }
+                            if (targetPage != -1 && targetPage != pagerState.currentPage) {
+                                pagerState.scrollToPage(targetPage)
+                            }
+                        }
+                        LaunchedEffect(pagerState) {
+                            snapshotFlow { pagerState.currentPage }.collect { page ->
+                                if (pagerState.isScrollInProgress && page in weekDays.indices) {
+                                    viewModel.selectDay(weekDays[page].date)
+                                }
+                            }
+                        }
+
+                        val isTodayDay = day.date == state.todayDate
+                        val dayLabel = if (isTodayDay) "Сегодня " else ""
+
+                        Row(
+                            Modifier.fillMaxWidth().padding(horizontal = hPadding),
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Text(
+                                "$dayLabel${dayName(day.date.dayOfWeek)} · ${day.date.format(FULL_DATE)}",
+                                style = MaterialTheme.typography.titleMedium,
+                                modifier = Modifier.weight(1f)
+                            )
+                            WeekSelector(
+                                periods = state.weeks.ifEmpty { listOf(schedule.period) },
+                                selectedWeekStart = state.weekStart,
+                                todayWeekStart = state.todayDate
+                                    ?.let { todayDate ->
+                                        state.weeks.firstOrNull { period ->
+                                            !todayDate.isBefore(period.weekStart) && !todayDate.isAfter(period.weekEnd)
+                                        }?.weekStart
+                                    }
+                                    ?: schedule.period.weekStart.takeIf {
+                                        state.todayDate?.let { today -> !today.isBefore(it) && !today.isAfter(it.plusDays(6)) } == true
+                                    },
+                                onSelect = viewModel::selectWeek
+                            )
+                        }
+                        HorizontalDivider(Modifier.padding(top = 8.dp, bottom = 0.dp, start = hPadding, end = hPadding))
+
+                        DayChips(
+                            days = weekDays,
+                            selectedDate = state.dayDate,
+                            todayDate = state.todayDate,
+                            onSelect = viewModel::selectDay,
+                            pagerState = pagerState
+                        )
+
+                        HorizontalDivider(Modifier.padding(top = 0.dp, start = hPadding, end = hPadding))
+
+                        HorizontalPager(state = pagerState, modifier = Modifier.weight(1f)) { page ->
+                            val pagerDay = weekDays.getOrNull(page)
+
+                            if (pagerDay == null || pagerDay.intervals.all { it.lessons.isEmpty() }) {
+                                Box(
+                                    modifier = Modifier.fillMaxSize(),
+                                    contentAlignment = Alignment.Center
+                                ) {
+                                    Text("Занятий нет", style = MaterialTheme.typography.bodyLarge)
+                                }
+                            } else {
+                                LazyColumn(
+                                    modifier = Modifier.fillMaxSize(),
+                                    verticalArrangement = Arrangement.spacedBy(8.dp),
+                                    contentPadding = PaddingValues(vertical = 8.dp)
+                                ) {
+                                    itemsIndexed(pagerDay.intervals) { slotIndex, slot ->
+                                        LessonSlot(slotIndex = slotIndex, slot = slot, showTeacher = false)
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/agzam/vyatsu/ui/teacher/TeacherScheduleViewModel.kt

@@ -0,0 +1,241 @@
+package agzam.vyatsu.ui.teacher
+
+import agzam.vyatsu.domain.ScheduleDates
+import agzam.vyatsu.domain.model.SchedulePeriod
+import agzam.vyatsu.domain.model.TeacherSchedule
+import agzam.vyatsu.domain.repository.PreferencesRepository
+import agzam.vyatsu.domain.repository.TeacherScheduleRepository
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import java.time.DayOfWeek
+import java.time.LocalDate
+import java.time.temporal.TemporalAdjusters
+import kotlin.coroutines.cancellation.CancellationException
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+
+class TeacherScheduleViewModel(
+    private val scheduleRepository: TeacherScheduleRepository,
+    private val preferencesRepository: PreferencesRepository
+) : ViewModel() {
+
+    private val _uiState = MutableStateFlow(TeacherScheduleUiState())
+    val uiState: StateFlow<TeacherScheduleUiState> = _uiState.asStateFlow()
+
+    private var currentTeacherName: String? = null
+    private var currentPeriod: SchedulePeriod? = null
+    private var scheduleJob: Job? = null
+    private var weeksJob: Job? = null
+    private var loadRevision = 0
+
+    init {
+        viewModelScope.launch {
+            val teacherId = preferencesRepository.selectedTeacherId()
+            if (teacherId != null) {
+                selectTeacher(teacherId)
+            } else {
+                _uiState.value = _uiState.value.copy(noTeacher = true, teacherName = null)
+            }
+        }
+    }
+
+    fun selectTeacher(name: String) {
+        val revision = ++loadRevision
+        currentTeacherName = name
+        _uiState.value = _uiState.value.copy(noTeacher = false, teacherName = name, isLoading = true, loadError = false)
+        viewModelScope.launch {
+            try {
+                preferencesRepository.setSelectedTeacherId(name)
+
+                val savedWeekStart = runCatching {
+                    preferencesRepository.selectedTeacherWeekStart()?.let(LocalDate::parse)
+                }.getOrNull()
+                val savedDayDate = runCatching {
+                    preferencesRepository.selectedTeacherDayDate()?.let(LocalDate::parse)
+                }.getOrNull()
+
+                val today = ScheduleDates.moscowToday()
+                val weekStart = savedWeekStart
+                    ?: today.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY))
+                if (revision != loadRevision) return@launch
+                _uiState.value = _uiState.value.copy(
+                    noTeacher = false,
+                    teacherName = name,
+                    weekStart = weekStart,
+                    dayDate = savedDayDate
+                )
+
+                val period = SchedulePeriod(
+                    weekStart = weekStart,
+                    weekEnd = weekStart.plusDays(6),
+                    season = ScheduleDates.currentSeason(today)
+                )
+                loadSchedule(period, revision)
+            } catch (e: CancellationException) {
+                throw e
+            }
+        }
+    }
+
+    private suspend fun loadSchedule(period: SchedulePeriod, revision: Int) {
+        if (revision != loadRevision) return
+        scheduleJob?.cancel()
+        scheduleJob = null
+        currentPeriod = period
+
+        if (!scheduleRepository.hasData(period)) {
+            _uiState.value = _uiState.value.copy(isLoading = true, loadError = false)
+            try {
+                scheduleRepository.syncPeriod(period.weekStart).collect { }
+            } catch (e: CancellationException) {
+                throw e
+            } catch (e: Exception) {
+            }
+            if (revision != loadRevision) return
+            if (!scheduleRepository.hasData(period)) {
+                _uiState.value = _uiState.value.copy(isLoading = false, loadError = true)
+                return
+            }
+        }
+
+        weeksJob?.cancel()
+        weeksJob = viewModelScope.launch {
+            val weeks = scheduleRepository.weeksFor(period.weekStart)
+            if (revision != loadRevision) return@launch
+            _uiState.value = _uiState.value.copy(weeks = weeks)
+        }
+
+        scheduleJob = viewModelScope.launch {
+            scheduleRepository.observeSchedule(period).collect { schedule ->
+                if (revision != loadRevision) {
+                    throw CancellationException("stale schedule observation")
+                }
+                currentTeacherName?.let { applySchedule(schedule, it) }
+            }
+        }
+    }
+
+    private suspend fun applySchedule(schedule: TeacherSchedule?, teacherName: String) {
+        val current = _uiState.value
+        if (schedule == null) return
+
+        val filteredDays = schedule.daysForTeacher(teacherName)
+        android.util.Log.d("TeacherSchedDebug", "apply: teacher=$teacherName periodWeek=$schedule.period rawDays=${schedule.days.size} filteredDays=${filteredDays.size}")
+        filteredDays.forEach { d ->
+            android.util.Log.d(
+                "TeacherSchedDebug",
+                "apply: filteredDay=${d.date} slots=${d.intervals.map { "${it.start}-${it.end}:${it.lessons.size}" }}"
+            )
+        }
+
+        val today = ScheduleDates.moscowToday()
+        val todayDate = if (isInPeriod(today, schedule.period)) today else null
+
+        val dayDate = when {
+            filteredDays.any { it.date == current.dayDate } -> current.dayDate
+            filteredDays.any { it.date == todayDate } -> todayDate
+            else -> filteredDays.firstOrNull()?.date
+        }
+
+        preferencesRepository.setSelectedTeacherWeekStart(schedule.period.weekStart.toString())
+        dayDate?.let { preferencesRepository.setSelectedTeacherDayDate(it.toString()) }
+
+        _uiState.value = current.copy(
+            schedule = schedule.copy(days = filteredDays),
+            weekStart = schedule.period.weekStart,
+            dayDate = dayDate,
+            todayDate = todayDate,
+            isLoading = false,
+            loadError = false
+        )
+    }
+
+    fun selectWeek(weekStart: LocalDate) {
+        val state = _uiState.value
+        val name = state.teacherName ?: return
+        if (state.weekStart == weekStart) return
+        val revision = ++loadRevision
+        viewModelScope.launch {
+            try {
+                preferencesRepository.setSelectedTeacherWeekStart(weekStart.toString())
+                if (revision != loadRevision) return@launch
+                _uiState.value = _uiState.value.copy(
+                    weekStart = weekStart,
+                    dayDate = null,
+                    schedule = null,
+                    isLoading = true,
+                    loadError = false
+                )
+                val period = SchedulePeriod(
+                    weekStart = weekStart,
+                    weekEnd = weekStart.plusDays(6),
+                    season = ScheduleDates.currentSeason(weekStart)
+                )
+                loadSchedule(period, revision)
+            } catch (e: CancellationException) {
+                throw e
+            }
+        }
+    }
+
+    fun selectDay(date: LocalDate) {
+        val state = _uiState.value
+        val schedule = state.schedule ?: return
+        if (date.isBefore(schedule.period.weekStart) || date.isAfter(schedule.period.weekEnd)) return
+        viewModelScope.launch {
+            preferencesRepository.setSelectedTeacherWeekStart(schedule.period.weekStart.toString())
+            preferencesRepository.setSelectedTeacherDayDate(date.toString())
+            _uiState.value = _uiState.value.copy(weekStart = schedule.period.weekStart, dayDate = date)
+        }
+    }
+
+    fun refresh() {
+        val period = currentPeriod ?: return
+        val revision = ++loadRevision
+        viewModelScope.launch {
+            try {
+                _uiState.value = _uiState.value.copy(isLoading = true, loadError = false)
+                try {
+                    scheduleRepository.syncPeriod(ScheduleDates.moscowToday()).collect { }
+                } catch (e: CancellationException) {
+                    throw e
+                } catch (e: Exception) {
+                }
+                if (revision != loadRevision) return@launch
+                loadSchedule(period, revision)
+            } catch (e: CancellationException) {
+                throw e
+            }
+        }
+    }
+
+    fun switchTeacher() {
+        loadRevision++
+        viewModelScope.launch {
+            currentTeacherName = null
+            currentPeriod = null
+            scheduleJob?.cancel()
+            scheduleJob = null
+            preferencesRepository.clearSelectedTeacher()
+            _uiState.value = TeacherScheduleUiState(noTeacher = true)
+        }
+    }
+
+    private fun isInPeriod(date: LocalDate, period: SchedulePeriod): Boolean =
+        !date.isBefore(period.weekStart) && !date.isAfter(period.weekEnd)
+}
+
+data class TeacherScheduleUiState(
+    val noTeacher: Boolean = true,
+    val isLoading: Boolean = false,
+    val loadError: Boolean = false,
+    val schedule: TeacherSchedule? = null,
+    val teacherName: String? = null,
+    val weekStart: LocalDate? = null,
+    val dayDate: LocalDate? = null,
+    val todayDate: LocalDate? = null,
+    val weeks: List<SchedulePeriod> = emptyList()
+)

app/src/main/java/agzam/vyatsu/ui/theme/Color.kt

@@ -0,0 +1,11 @@
+package agzam.vyatsu.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)

app/src/main/java/agzam/vyatsu/ui/theme/Theme.kt

@@ -0,0 +1,58 @@
+package agzam.vyatsu.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun VyatsuScheduleTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}

app/src/main/java/agzam/vyatsu/ui/theme/Type.kt

@@ -0,0 +1,34 @@
+package agzam.vyatsu.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)

app/src/main/java/agzam/vyatsu/update/AppUpdater.kt

@@ -0,0 +1,217 @@
+package agzam.vyatsu.update
+
+import agzam.vyatsu.BuildConfig
+import agzam.vyatsu.data.remote.update.GiteaReleaseApi
+import agzam.vyatsu.domain.repository.PreferencesRepository
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.provider.Settings
+import android.util.Log
+import androidx.core.content.FileProvider
+import kotlin.coroutines.cancellation.CancellationException
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import java.io.File
+import java.io.IOException
+import java.util.concurrent.TimeUnit
+
+sealed interface UpdateState {
+    data object Idle : UpdateState
+    data object Checking : UpdateState
+    data object UpToDate : UpdateState
+    data class Available(val version: String, val notes: String?) : UpdateState
+    data class Downloading(val progress: Int?) : UpdateState
+    data object ReadyToInstall : UpdateState
+    data class Failed(val message: String) : UpdateState
+}
+
+class AppUpdater(
+    private val context: Context,
+    private val preferencesRepository: PreferencesRepository
+) {
+
+    private val scope = CoroutineScope(Dispatchers.IO)
+
+    private val client = OkHttpClient.Builder()
+        .connectTimeout(15, TimeUnit.SECONDS)
+        .readTimeout(60, TimeUnit.SECONDS)
+        .build()
+
+    private val api = GiteaReleaseApi(client)
+
+    private val _state = MutableStateFlow<UpdateState>(UpdateState.Idle)
+    val state: StateFlow<UpdateState> = _state.asStateFlow()
+
+    private var job: Job? = null
+    private var pendingUpdate: AvailableUpdate? = null
+    private var downloadedApk: File? = null
+
+    fun autoCheckAndInstall() {
+        if (job?.isActive == true) return
+        job = scope.launch {
+            if (!preferencesRepository.autoUpdateEnabled()) return@launch
+            runCatching {
+                val update = check() ?: return@launch
+                install(download(update))
+            }.onFailure(::onUpdateFailed)
+        }
+    }
+
+    fun checkForUpdate() {
+        if (job?.isActive == true) return
+        job = scope.launch {
+            runCatching { check() }.onFailure(::onUpdateFailed)
+        }
+    }
+
+    fun downloadAndInstall() {
+        if (job?.isActive == true) return
+        val update = pendingUpdate ?: return
+        job = scope.launch {
+            if (!preferencesRepository.autoUpdateEnabled()) return@launch
+            runCatching { install(download(update)) }.onFailure(::onUpdateFailed)
+        }
+    }
+
+    fun installDownloadedApk() {
+        val apk = downloadedApk ?: return
+        install(apk)
+    }
+
+    fun setAutoEnabled(enabled: Boolean) {
+        if (!enabled) {
+            job?.cancel()
+            if (_state.value is UpdateState.Downloading || _state.value is UpdateState.Checking) {
+                _state.value = UpdateState.Idle
+            }
+        }
+        scope.launch {
+            preferencesRepository.setAutoUpdateEnabled(enabled)
+        }
+    }
+
+    fun canRequestInstalls(): Boolean =
+        context.packageManager.canRequestPackageInstalls()
+
+    fun openUnknownSourcesSettings() {
+        val intent = Intent(
+            Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES,
+            Uri.parse("package:${context.packageName}")
+        ).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        runCatching { context.startActivity(intent) }
+    }
+
+    private suspend fun check(): AvailableUpdate? {
+        _state.value = UpdateState.Checking
+        val release = api.latestRelease()
+        if (release == null) {
+            _state.value = UpdateState.UpToDate
+            return null
+        }
+
+        val remoteVersion = release.tagName?.trimStart('v', 'V')
+        if (remoteVersion == null || !isNewerVersion(remoteVersion, BuildConfig.VERSION_NAME.trimStart('v', 'V'))) {
+            _state.value = UpdateState.UpToDate
+            return null
+        }
+
+        val apkUrl = api.apkDownloadUrl(release)
+            ?: throw IOException("В релизе $remoteVersion нет APK-файла")
+
+        val update = AvailableUpdate(version = remoteVersion, apkUrl = apkUrl)
+        pendingUpdate = update
+        _state.value = UpdateState.Available(update.version, release.body)
+        return update
+    }
+
+    private suspend fun download(update: AvailableUpdate): File {
+        _state.value = UpdateState.Downloading(null)
+
+        val dir = File(context.cacheDir, "updates").apply { mkdirs() }
+        val target = File(dir, "update-${update.version}.apk")
+        downloadedApk?.delete()
+
+        val response = client.newCall(Request.Builder().url(update.apkUrl).get().build()).execute()
+        response.use { resp ->
+            if (!resp.isSuccessful) throw IOException("HTTP ${resp.code} при скачивании")
+            val body = resp.body ?: throw IOException("Пустой ответ при скачивании")
+            val contentLength = body.contentLength()
+
+            body.byteStream().use { input ->
+                target.outputStream().use { output ->
+                    val buffer = ByteArray(BUFFER_SIZE_BYTES)
+                    var readTotal = 0L
+                    while (true) {
+                        val read = input.read(buffer)
+                        if (read == -1) break
+                        output.write(buffer, 0, read)
+                        readTotal += read
+                        if (contentLength > 0) {
+                            _state.value = UpdateState.Downloading((readTotal * 100 / contentLength).toInt())
+                        }
+                    }
+                }
+            }
+        }
+
+        if (target.length() == 0L) {
+            target.delete()
+            throw IOException("Скачанный файл пуст")
+        }
+
+        downloadedApk = target
+        _state.value = UpdateState.ReadyToInstall
+        return target
+    }
+
+    private fun install(apk: File) {
+        if (!canRequestInstalls()) {
+            return
+        }
+        val uri = FileProvider.getUriForFile(
+            context,
+            "${context.packageName}.fileprovider",
+            apk
+        )
+        val intent = Intent(Intent.ACTION_INSTALL_PACKAGE).apply {
+            data = uri
+            addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        }
+        runCatching { context.startActivity(intent) }
+            .onFailure { Log.e(TAG, "Не удалось запустить установку", it) }
+    }
+
+    private fun onUpdateFailed(error: Throwable) {
+        if (error is CancellationException) throw error
+        Log.e(TAG, "Ошибка обновления", error)
+        _state.value = UpdateState.Failed(error.message ?: "Неизвестная ошибка")
+    }
+
+    private data class AvailableUpdate(val version: String, val apkUrl: String)
+
+    private fun isNewerVersion(remote: String, local: String): Boolean {
+        val remoteParts = remote.split('.').map { it.toLongOrNull() ?: 0L }
+        val localParts = local.split('.').map { it.toLongOrNull() ?: 0L }
+        val size = maxOf(remoteParts.size, localParts.size)
+        for (i in 0 until size) {
+            val r = remoteParts.getOrElse(i) { 0L }
+            val l = localParts.getOrElse(i) { 0L }
+            if (r != l) return r > l
+        }
+        return false
+    }
+
+    private companion object {
+        const val TAG = "AppUpdate"
+        const val BUFFER_SIZE_BYTES = 8 * 1024
+    }
+}

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

app/src/main/res/drawable/icon.xml

@@ -0,0 +1,109 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="100dp"
+    android:height="100dp"
+    android:viewportWidth="20"
+    android:viewportHeight="20">
+  <path
+      android:pathData="M1,6L1,18L19,18L19,6"
+      android:strokeLineJoin="round"
+      android:strokeWidth="0"
+      android:strokeLineCap="round">
+    <aapt:attr name="android:fillColor">
+      <gradient
+          android:startX="1"
+          android:startY="18"
+          android:endX="19"
+          android:endY="6"
+          android:type="linear">
+        <item android:offset="0" android:color="#FF5581D5"/>
+        <item android:offset="1" android:color="#FF4063CD"/>
+      </gradient>
+    </aapt:attr>
+    <aapt:attr name="android:strokeColor">
+      <gradient
+          android:startX="1"
+          android:startY="18"
+          android:endX="19"
+          android:endY="6"
+          android:type="linear">
+        <item android:offset="0" android:color="#FF5581D5"/>
+        <item android:offset="1" android:color="#FF4063CD"/>
+      </gradient>
+    </aapt:attr>
+  </path>
+  <path
+      android:pathData="M19,18L1,18C12,18 19,14 19,6Z"
+      android:strokeLineJoin="round"
+      android:strokeWidth="0"
+      android:strokeLineCap="round">
+    <aapt:attr name="android:fillColor">
+      <gradient
+          android:startX="1"
+          android:startY="18"
+          android:endX="19"
+          android:endY="6"
+          android:type="linear">
+        <item android:offset="0" android:color="#FF6598E3"/>
+        <item android:offset="1" android:color="#FF74A2E6"/>
+      </gradient>
+    </aapt:attr>
+    <aapt:attr name="android:strokeColor">
+      <gradient
+          android:startX="1"
+          android:startY="18"
+          android:endX="19"
+          android:endY="6"
+          android:type="linear">
+        <item android:offset="0" android:color="#FF6598E3"/>
+        <item android:offset="1" android:color="#FF74A2E6"/>
+      </gradient>
+    </aapt:attr>
+  </path>
+  <path
+      android:pathData="M4,4C4,2 6,2 6,4L14,4C14,2 16,2 16,4L19,4L19,6L1,6L1,4Z"
+      android:strokeLineJoin="round"
+      android:strokeWidth="0"
+      android:strokeLineCap="round">
+    <aapt:attr name="android:fillColor">
+      <gradient
+          android:startX="1"
+          android:startY="2.5"
+          android:endX="19"
+          android:endY="2.5"
+          android:type="linear">
+        <item android:offset="0" android:color="#FF4260C4"/>
+        <item android:offset="1" android:color="#FF0E2CB0"/>
+      </gradient>
+    </aapt:attr>
+    <aapt:attr name="android:strokeColor">
+      <gradient
+          android:startX="1"
+          android:startY="2.5"
+          android:endX="19"
+          android:endY="2.5"
+          android:type="linear">
+        <item android:offset="0" android:color="#FF4260C4"/>
+        <item android:offset="1" android:color="#FF0E2CB0"/>
+      </gradient>
+    </aapt:attr>
+  </path>
+  <path
+      android:pathData="M3,8L17,8C18,8 18,9 17,9L3,9C2,9 2,8 3,8M3,11L14,11C15,11 15,12 14,12L3,12C2,12 2,11 3,11M4,14L12,14C13,14 13,15 12,15L5,15C4,15 4,14 5,14M3,14C4,14 4,15 3,15C2,15 2,14 3,14"
+      android:strokeLineJoin="round"
+      android:strokeWidth="0"
+      android:strokeColor="#00000000"
+      android:strokeLineCap="round">
+    <aapt:attr name="android:fillColor">
+      <gradient
+          android:startX="2.25"
+          android:startY="8"
+          android:endX="17.75"
+          android:endY="8"
+          android:type="linear">
+        <item android:offset="0" android:color="#FF4260C4"/>
+        <item android:offset="1" android:color="#FF0E2CB0"/>
+      </gradient>
+    </aapt:attr>
+  </path>
+</vector>

app/src/main/res/icon.svg

@@ -0,0 +1,35 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100px" height="100px" viewBox="-10 -10 20 20">
+  <defs>
+    <linearGradient id="accent">
+      <stop offset="0%" stop-color="#4260c4" />
+      <stop offset="100%" stop-color="#0e2cb0" />
+    </linearGradient>
+
+    <linearGradient id="bg" x1="0%" y1="100%" x2="100%" y2="0%">
+      <stop offset="0%" stop-color="#5581d5" />
+      <stop offset="100%" stop-color="#4063cd" />
+    </linearGradient>
+
+    <linearGradient id="bga" x1="0%" y1="100%" x2="100%" y2="0%">
+      <stop offset="0%" stop-color="#6598e3" />
+      <stop offset="100%" stop-color="#74a2e6" />
+    </linearGradient>
+  </defs>
+
+  <g stroke-width="0" stroke-linejoin="round" stroke-linecap="round">
+  <!-- <path stroke="#111" d="M -9 -4 L -9 8 L 9 8 L 9 -4"/> -->
+
+  <path stroke="url(#bg)" fill="url(#bg)" d="M -9 -4 L -9 8 L 9 8 L 9 -4"/>
+  <path stroke="url(#bga)" fill="url(#bga)" d="M 9 8 L -9 8 C 2 8 9 4 9 -4 Z"/>
+
+  <!-- <path stroke="#111" d="M -6 -6 C -6 -8 -4 -8 -4 -6 L 4 -6 C 4 -8 6 -8 6 -6 L 9 -6 L 9 -4 L -9 -4 L -9 -6 Z"/> -->
+
+  <g stroke="url(#accent)">
+  <path fill="url(#accent)" d="M -6 -6 C -6 -8 -4 -8 -4 -6 L 4 -6 C 4 -8 6 -8 6 -6 L 9 -6 L 9 -4 L -9 -4 L -9 -6 Z"/>
+
+  <path fill="url(#accent)" stroke="none" d="M -7 -2 L 7 -2 C 8 -2 8 -1 7 -1 L -7 -1 C -8 -1 -8 -2 -7 -2 M -7 1 L 4 1 C 5 1 5 2 4 2 L -7 2 C -8 2 -8 1 -7 1 M -6 4 L 2 4 C 3 4 3 5 2 5 L -5 5 C -6 5 -6 4 -5 4 M -7 4 C -6 4 -6 5 -7 5 C -8 5 -8 4 -7 4"/>
+  </g>
+
+  </g>
+
+</svg>

app/src/main/res/mipmap-anydpi/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>