fix(chat): fix match chat not displaying messages for sender

- Add nested user object with country to match messages (API + Socket.IO)
- Change io.to() to io.in() to include sender in broadcast
- Apply same broadcast fix to event chat for consistency

backend/src/routes/matches.js

@@ -515,6 +515,7 @@ router.get('/:slug/messages', authenticate, async (req, res, next) => {
             avatar: true,
             firstName: true,
             lastName: true,
+            country: true,
           },
         },
       },
@@ -535,6 +536,7 @@ router.get('/:slug/messages', authenticate, async (req, res, next) => {
           avatar: msg.user.avatar,
           firstName: msg.user.firstName,
           lastName: msg.user.lastName,
+          country: msg.user.country,
         },
         content: msg.content,
         type: msg.type,

backend/src/socket/index.js

@@ -365,8 +365,8 @@ function initializeSocket(httpServer) {
           },
         });
 
-        // Broadcast message to room
-        io.to(roomName).emit('event_message', {
+        // Broadcast message to room (including sender)
+        io.in(roomName).emit('event_message', {
           id: message.id,
           roomId: message.roomId,
           userId: message.user.id,
@@ -474,21 +474,27 @@ function initializeSocket(httpServer) {
                 id: true,
                 username: true,
                 avatar: true,
+                country: true,
               },
             },
           },
         });
 
-        // Broadcast to match room
-        io.to(roomName).emit('match_message', {
+        // Broadcast to match room (including sender)
+        io.in(roomName).emit('match_message', {
           id: message.id,
           roomId: message.roomId,
           userId: message.user.id,
-          username: message.user.username,
-          avatar: message.user.avatar,
           content: message.content,
           type: message.type,
           createdAt: message.createdAt,
+          // Nested user data (consistent with event_message format)
+          user: {
+            id: message.user.id,
+            username: message.user.username,
+            avatar: message.user.avatar,
+            country: message.user.country,
+          },
         });
 
         console.log(`💬 Private message in match ${matchId} from ${socket.user.username}`);