Fix critical room functionality issues

- Fix room field not being copied when creating messageWithPeerID in BluetoothMeshService
- This was causing all room messages to appear in main chat
- Fix room member tracking by ensuring senderPeerID is included
- Change room color from orange to blue to differentiate from private messages
- Clean up room members when peers disconnect to fix member count
- Add debug logging to track room field through message flow

bitchat/Services/BluetoothMeshService.swift

@@ -527,6 +527,8 @@ class BluetoothMeshService: NSObject {
                 room: room
             )
             
+            print("[DEBUG-SEND] Creating message with room: \(room ?? "nil")")
+            
             if let messageData = message.toBinaryPayload() {
                 // Sign the message payload (no encryption for broadcasts)
                 let signature: Data?
@@ -1198,6 +1200,7 @@ class BluetoothMeshService: NSObject {
                     
                     // Parse broadcast message (not encrypted)
                     if let message = BitchatMessage.fromBinaryPayload(packet.payload) {
+                        print("[DEBUG-RECV] Received message with room: \(message.room ?? "nil"), content: \(message.content)")
                             
                         // Store nickname mapping
                         peerNicknamesLock.lock()
@@ -1213,7 +1216,8 @@ class BluetoothMeshService: NSObject {
                             isPrivate: false,
                             recipientNickname: nil,
                             senderPeerID: senderID,
-                            mentions: message.mentions
+                            mentions: message.mentions,
+                            room: message.room
                         )
                         
                         DispatchQueue.main.async {
@@ -1309,7 +1313,9 @@ class BluetoothMeshService: NSObject {
                             originalSender: message.originalSender,
                             isPrivate: message.isPrivate,
                             recipientNickname: message.recipientNickname,
-                            senderPeerID: senderID
+                            senderPeerID: senderID,
+                            mentions: message.mentions,
+                            room: message.room
                         )
                         
                         DispatchQueue.main.async {

bitchat/ViewModels/ChatViewModel.swift

@@ -765,6 +765,17 @@ extension ChatViewModel: BitchatDelegate {
         connectedPeers = peers
         isConnected = !peers.isEmpty
         
+        // Clean up room members who disconnected
+        for (room, memberIDs) in roomMembers {
+            // Remove disconnected peers from room members
+            let activeMembers = memberIDs.filter { memberID in
+                memberID == meshService.myPeerID || peers.contains(memberID)
+            }
+            if activeMembers != memberIDs {
+                roomMembers[room] = activeMembers
+            }
+        }
+        
         // Force UI update
         objectWillChange.send()
         

bitchat/Views/ContentView.swift

@@ -215,7 +215,7 @@ struct ContentView: View {
                     }) {
                         Text("\(currentRoom) (\(memberCount))")
                             .font(.system(size: 18, weight: .medium, design: .monospaced))
-                            .foregroundColor(Color.orange)
+                            .foregroundColor(Color.blue)
                     }
                     .buttonStyle(.plain)
                     
@@ -511,7 +511,7 @@ struct ContentView: View {
                                     HStack {
                                         Text(room)
                                             .font(.system(size: 14, design: .monospaced))
-                                            .foregroundColor(viewModel.currentRoom == room ? Color.orange : textColor)
+                                            .foregroundColor(viewModel.currentRoom == room ? Color.blue : textColor)
                                         
                                         Spacer()