fix: WS upgrade via metrics middleware (realtime), DM names, tap reactions

server/internal/platform/metrics/metrics_test.go

@@ -0,0 +1,30 @@
+package metrics
+
+import (
+	"bufio"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+type hijackRecorder struct {
+	*httptest.ResponseRecorder
+}
+
+func (h *hijackRecorder) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	return nil, nil, nil
+}
+
+func TestMiddlewarePreservesHijacker(t *testing.T) {
+	var seen http.ResponseWriter
+	handler := Middleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		seen = w
+	}))
+
+	handler.ServeHTTP(&hijackRecorder{httptest.NewRecorder()}, httptest.NewRequest(http.MethodGet, "/", nil))
+
+	if _, ok := seen.(http.Hijacker); !ok {
+		t.Fatal("middleware stripped http.Hijacker: WebSocket upgrades will fail")
+	}
+}