ui: no more empty lines in schedule

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

@@ -1,6 +1,7 @@
 package agzam.vyatsu.ui.schedule
 
 import agzam.vyatsu.domain.model.Day
+import agzam.vyatsu.domain.model.LessonType
 import agzam.vyatsu.domain.model.SchedulePeriod
 import agzam.vyatsu.domain.model.TimeSlot
 import androidx.compose.foundation.clickable
@@ -285,27 +286,48 @@ private fun LessonSlot(slotIndex: Int, slot: TimeSlot) {
         } else {
             slot.lessons.forEach { lesson ->
                 Column(Modifier.fillMaxWidth().padding(vertical = 2.dp)) {
+                    var any = false
+                    if(lesson.type != LessonType.OTHER) {
                         Text(
                             lesson.type.label,
                             style = MaterialTheme.typography.bodySmall,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
                         )
+                        any = true
+                    }
 
+                    val subject = lesson.subject?.takeIf { it.isNotBlank() } ?: lesson.raw
+                    if(subject.isNotEmpty()) {
                         Text(
-                        lesson.subject?.takeIf { it.isNotBlank() } ?: lesson.raw,
+                            subject,
                             style = MaterialTheme.typography.bodyLarge
                         )
-                    Text(
+                        any = true
-                        listOfNotNull(
+                    }
+
+                    val meta = listOfNotNull(
                         lesson.subgroup,
                         lesson.teacher,
                         lesson.room
-                        )
+                    ).filter { it.isNotBlank() }.joinToString(" · ")
-                            .filter { it.isNotBlank() }
+
-                            .joinToString(" · "),
+                    if(meta.isNotEmpty()) {
+                        Text(
+                            meta,
                             style = MaterialTheme.typography.bodySmall,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
                         )
+                        any = true
+                    }
+
+                    if(!any) {
+                        Text(
+                            "-",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
+
                 }
             }
         }