feat: implement real-time conversation deletion handling via socket events

src/hooks/useMessaging.ts

@@ -587,6 +587,19 @@ export function useMessaging(options: UseMessagingOptions = {}): UseMessagingRet
       }
     );
 
+    // Conversation deleted by the other party — remove from local state
+    const unsubscribeConvDeleted = socketService.onConversationDeleted(
+      (data: Record<string, unknown>) => {
+        const convId = data.conversationId as string | undefined;
+        if (!convId) return;
+        setConversations((prev) => prev.filter((c) => c.id !== convId));
+        if (currentConversationIdRef.current === convId) {
+          currentConversationIdRef.current = null;
+          setMessages([]);
+        }
+      }
+    );
+
     // Auth error handling (token refresh + reconnect) is handled globally
     // by PresenceProvider — no duplicate handler needed here.
 
@@ -598,6 +611,7 @@ export function useMessaging(options: UseMessagingOptions = {}): UseMessagingRet
       unsubscribeStatus();
       unsubscribeRead();
       unsubscribeDelivered();
+      unsubscribeConvDeleted();
       // Clean up typing timeout to prevent memory leak
       if (typingTimeoutRef.current) {
         clearTimeout(typingTimeoutRef.current);