feat(chat): initialize current room name in MultiChatDialog.vue

- Added a new property `currentRoomName` to track the name of the currently selected room.
- Updated the initialization logic to reset `currentRoomName` when rooms are loaded and when the chat is disconnected, ensuring accurate room state management.

frontend/src/dialogues/chat/MultiChatDialog.vue

@@ -364,6 +364,7 @@ export default {
             connectAttemptTimeout: null,
             joinFallbackTimer: null,
             roomSyncInFlight: false,
+            currentRoomName: '',
             // Faster handshake watchdog separate from reconnect interval
             handshakeWatchdogMs: 2500,
             // Rotate to next candidate if a connection never reaches 'open'
@@ -756,6 +757,7 @@ export default {
         initializeRooms(rooms) {
             this.rooms = rooms;
             this.selectedRoom = rooms.length ? rooms[0].id : null;
+            this.currentRoomName = '';
             this.autoscroll = true;
             try { this.urlOverride = localStorage.getItem('chatWsOverride') || ''; } catch (_) { this.urlOverride = ''; }
             this.messages = [];
@@ -1084,6 +1086,8 @@ export default {
             this.chatWs = null;
             this.chatConnected = false;
             this.announcedRoomEnter = false;
+            this.currentRoomName = '';
+            this.roomSyncInFlight = false;
             this.usersInRoom = [];
             this.selectedTargetUser = null;
         },
@@ -1179,12 +1183,7 @@ export default {
                     if (this.joinFallbackTimer) { clearTimeout(this.joinFallbackTimer); this.joinFallbackTimer = null; }
                     const actualRoom = msg.to || msg.room || msg.roomName || '';
                     const desiredRoom = this.resolveInitialRoomName();
-                    if (actualRoom) {
-                        const matchingRoom = this.rooms.find((room) => (room.title || room.name) === actualRoom);
-                        if (matchingRoom) {
-                            this.selectedRoom = matchingRoom.id;
-                        }
-                    }
+                    this.currentRoomName = actualRoom || '';
                     if (
                         this.adultOnlyMode
                         && desiredRoom