feat: add ActiveCall list auto-compact extension

Author: SERDUN

lib/features/call/extensions/active_call_extension.dart

@@ -0,0 +1,18 @@
+import '../bloc/call_bloc.dart';
+import '../models/models.dart';
+
+extension ActiveCallListAutoCompact on List<ActiveCall> {
+  /// Determines if auto-hide (Compact Mode) is active.
+  bool get shouldAutoCompact {
+    var hasAnyVideo = false;
+
+    for (final c in this) {
+      if (c.wasHungUp) return false;
+      if (c.processingStatus != CallProcessingStatus.connected) return false;
+
+      hasAnyVideo = hasAnyVideo || (c.cameraEnabled && c.remoteVideo);
+    }
+
+    return hasAnyVideo;
+  }
+}

lib/features/call/extensions/extensions.dart

@@ -1,3 +1,4 @@
+export 'active_call_extension.dart';
 export 'callkeep_signaling_status_converter.dart';
 export 'connectivity.dart';
 export 'processing_status.dart';