fix: hide local camera preview when video is logically muted

Author: SERDUN

lib/features/call/bloc/call_state.dart

@@ -231,9 +231,12 @@ class ActiveCall with _$ActiveCall implements CallEntry {
 
   bool get remoteVideo => remoteStream?.getVideoTracks().isNotEmpty ?? video;
 
-  bool get localVideo => localStream?.getVideoTracks().isNotEmpty ?? false;
-
-  bool get cameraEnabled => localStream?.getVideoTracks().firstOrNull?.enabled == true;
+  /// Determines whether the local camera preview should be shown.
+  ///
+  /// The `&& video` check prevents displaying a "black square" when the video is
+  /// logically muted (user intent), but the track remains technically active
+  /// (e.g., sending black frames to maintain the co
+  bool get cameraEnabled => localStream?.getVideoTracks().firstOrNull?.enabled == true && video;
 }
 
 extension ActiveCallIterableExtension<T extends ActiveCall> on Iterable<T> {

lib/features/call/view/call_active_scaffold.dart

@@ -79,7 +79,7 @@ class CallActiveScaffoldState extends State<CallActiveScaffold> {
                       ),
                     ),
                   ),
-                if (activeCall.localVideo)
+                if (activeCall.cameraEnabled)
                   AnimatedPositioned(
                     right: 10 + mediaQueryData.padding.right,
                     top: 10 + mediaQueryData.padding.top + (compact ? 0 : 100),