Update logging to only write to disk on macOS

- Add conditional compilation to LoggingService
- macOS continues to write logs to Documents/Logs
- iOS uses /dev/null to prevent disk writes
- Remove room auto-join on mention (only join when sending to room)

bitchat.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 54;
+	objectVersion = 63;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -39,7 +39,7 @@
 		763E0DBA9492A654FC0CDCB9 /* AppInfoView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppInfoView.swift; sourceTree = "<group>"; };
 		7EEBDA723E1CFD88758DA4AC /* bitchat.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = bitchat.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		96CDF6D0AF0F2052A6C7E634 /* LoggingService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoggingService.swift; sourceTree = "<group>"; };
-		997D512074C64904D75DDD40 /* bitchat.app */ = {isa = PBXFileReference; includeInIndex = 0; lastKnownFileType = wrapper.application; path = bitchat.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		997D512074C64904D75DDD40 /* bitchat.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = bitchat.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		A08E03AA0C63E97C91749AEC /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 		A2136C3E22D02D4A8DBE7EAB /* BinaryProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BinaryProtocol.swift; sourceTree = "<group>"; };
 		D5C3D880FF8AE1673B20E1E3 /* BluetoothMeshService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BluetoothMeshService.swift; sourceTree = "<group>"; };
@@ -183,7 +183,6 @@
 			);
 			mainGroup = 18198ED912AAF495D8AF7763;
 			minimizedProjectReferenceProxies = 1;
-			preferredProjectObjectVersion = 54;
 			projectDirPath = "";
 			projectRoot = "";
 			targets = (
@@ -259,6 +258,7 @@
 				CODE_SIGNING_REQUIRED = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = bitchat/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
@@ -285,6 +285,7 @@
 				CODE_SIGNING_REQUIRED = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = bitchat/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;

bitchat/Services/LoggingService.swift

@@ -22,6 +22,8 @@ class LoggingService {
         dateFormatter = DateFormatter()
         dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
         
+        #if os(macOS)
+        // Only create log files on macOS
         // Get documents directory
         let documentsPath = FileManager.default.urls(for: .documentDirectory, 
                                                     in: .userDomainMask).first!
@@ -45,6 +47,10 @@ class LoggingService {
         
         log("=== BitChat Started ===")
         log("Log file: \(fileURL.path)")
+        #else
+        // On iOS, just create a dummy URL since we won't write to disk
+        fileURL = URL(fileURLWithPath: "/dev/null")
+        #endif
     }
     
     func log(_ message: String, category: String = "general") {

bitchat/ViewModels/ChatViewModel.swift

@@ -261,10 +261,10 @@ class ChatViewModel: ObservableObject {
                 messages.append(message)
             }
             
-            // Auto-join any new rooms mentioned in the message
-            for room in rooms {
-                if !joinedRooms.contains(room) {
-                    joinRoom(room)
+            // Only auto-join rooms if we're sending TO that room
+            if let messageRoom = messageRoom {
+                if !joinedRooms.contains(messageRoom) {
+                    joinRoom(messageRoom)
                 }
             }
             
@@ -631,6 +631,8 @@ class ChatViewModel: ObservableObject {
 
 extension ChatViewModel: BitchatDelegate {
     func didReceiveMessage(_ message: BitchatMessage) {
+        bitchatLog("Received message from \(message.sender), room: \(message.room ?? "nil"), senderPeerID: \(message.senderPeerID ?? "nil")", category: "message")
+        
         if message.isPrivate {
             // Handle private message
             
@@ -675,7 +677,7 @@ extension ChatViewModel: BitchatDelegate {
             roomMessages[room]?.append(message)
             roomMessages[room]?.sort { $0.timestamp < $1.timestamp }
             
-            // Track room members
+            // Track room members - only track the sender as a member
             if roomMembers[room] == nil {
                 roomMembers[room] = []
             }