Implement message retention, retry mechanism, and app updates

- Add KeychainManager for secure password storage
- Implement MessageRetentionService for encrypted local storage of favorite room messages
- Add MessageRetryService for automatic retry of failed messages
- Add /favorite command to toggle room retention
- Add /discover command to find active rooms
- Fix all force unwrapped optionals in BluetoothMeshService
- Update app info screen with new features
- Integrate all services with proper cleanup on panic

bitchat.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 63;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -12,7 +12,9 @@
 		1D9674FA5F998503831DC281 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A08E03AA0C63E97C91749AEC /* ContentView.swift */; };
 		230B11C5BF035D35638B21C8 /* PasswordProtectedRoomTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = FB12482E4AD78B861C538449 /* PasswordProtectedRoomTests.swift */; };
 		2E71E320EA921498C57E023B /* BitchatMessageTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3FA8FF26ABDC1C642A8C7AE5 /* BitchatMessageTests.swift */; };
+		4274B6016F755946FBF2513E /* MessageRetentionService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 67A85BFDDE65B4CD8BDF6DDB /* MessageRetentionService.swift */; };
 		4B747085D07A1BCE0F5BA612 /* BinaryProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = A2136C3E22D02D4A8DBE7EAB /* BinaryProtocol.swift */; };
+		4E778E5A414571ACAC2A0F01 /* MessageRetentionService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 67A85BFDDE65B4CD8BDF6DDB /* MessageRetentionService.swift */; };
 		56F0892E13CC0D1490A3691E /* BloomFilterTests.swift.disabled in Resources */ = {isa = PBXBuildFile; fileRef = 822AA698BDB7BB939B62A010 /* BloomFilterTests.swift.disabled */; };
 		61C81ED5F679D5E973EE0C07 /* NotificationService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3448F84BF86A42A3CC4A9379 /* NotificationService.swift */; };
 		6A624D9359BCCAAE58CE0D64 /* LoggingService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96CDF6D0AF0F2052A6C7E634 /* LoggingService.swift */; };
@@ -25,6 +27,7 @@
 		7A50E2F04A3515A7E90EEAE4 /* BluetoothMeshService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D5C3D880FF8AE1673B20E1E3 /* BluetoothMeshService.swift */; };
 		7DD72D928FF9DD3CA81B46B0 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 3A69677D382F1C3D5ED03F7D /* Assets.xcassets */; };
 		8F0BFC2D2B2A5E7B70C3B485 /* BinaryProtocolTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 53D535D9CE0B875F47402290 /* BinaryProtocolTests.swift */; };
+		8F737CE0435792CC2AD65FCB /* KeychainManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 136696FC4436A02D98CE6A77 /* KeychainManager.swift */; };
 		923027D6F2F417AFA2488127 /* BitchatProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = 229F17B68CFF7AB1BC91C847 /* BitchatProtocol.swift */; };
 		92D34E7A07C990C8A815B0CE /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A08E03AA0C63E97C91749AEC /* ContentView.swift */; };
 		A0691E21A3A358AB9715AC20 /* BloomFilterTests.swift.disabled in Resources */ = {isa = PBXBuildFile; fileRef = 822AA698BDB7BB939B62A010 /* BloomFilterTests.swift.disabled */; };
@@ -32,13 +35,16 @@
 		AD11E46940D742AEAF547EB2 /* AppInfoView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 763E0DBA9492A654FC0CDCB9 /* AppInfoView.swift */; };
 		ADC66F95FBD513B10411ADB3 /* MessagePaddingTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8DE9CDF66D4E52D268851048 /* MessagePaddingTests.swift */; };
 		BCCFEDC1EBE59323C3C470BF /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 3A69677D382F1C3D5ED03F7D /* Assets.xcassets */; };
+		C99763A4761567F587D21688 /* MessageRetryService.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA4D7595A613F7ED3B386132 /* MessageRetryService.swift */; };
 		CDAD6629EB69916B95C80DAF /* BinaryProtocolTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 53D535D9CE0B875F47402290 /* BinaryProtocolTests.swift */; };
+		CEAE115C9C3EB3C4ED82F128 /* MessageRetryService.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA4D7595A613F7ED3B386132 /* MessageRetryService.swift */; };
 		D450CF41F207BDE1A1AAA56E /* ChatViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = E6B8F7B7D55092C2540A7996 /* ChatViewModel.swift */; };
 		D948085736ED8E736C1DE3B0 /* BluetoothMeshService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D5C3D880FF8AE1673B20E1E3 /* BluetoothMeshService.swift */; };
 		DDA1DFAB1FF7AADE52DC0F53 /* EncryptionService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6DC1563390A15C042D059CF9 /* EncryptionService.swift */; };
 		F00B713D5053617FB5F3F1BE /* MessagePaddingTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8DE9CDF66D4E52D268851048 /* MessagePaddingTests.swift */; };
 		F455F011B3B648ADA233F998 /* BinaryProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = A2136C3E22D02D4A8DBE7EAB /* BinaryProtocol.swift */; };
 		F4A689F5F34125AE1BFD5599 /* PasswordProtectedRoomTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = FB12482E4AD78B861C538449 /* PasswordProtectedRoomTests.swift */; };
+		FB8819B4C84FAFEF5C36B216 /* KeychainManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 136696FC4436A02D98CE6A77 /* KeychainManager.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -60,20 +66,23 @@
 
 /* Begin PBXFileReference section */
 		03C57F452B55FD0FD8F51421 /* bitchatTests_macOS.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = bitchatTests_macOS.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		136696FC4436A02D98CE6A77 /* KeychainManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KeychainManager.swift; sourceTree = "<group>"; };
 		229F17B68CFF7AB1BC91C847 /* BitchatProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BitchatProtocol.swift; sourceTree = "<group>"; };
 		3448F84BF86A42A3CC4A9379 /* NotificationService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationService.swift; sourceTree = "<group>"; };
 		3A69677D382F1C3D5ED03F7D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		3FA8FF26ABDC1C642A8C7AE5 /* BitchatMessageTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BitchatMessageTests.swift; sourceTree = "<group>"; };
 		53D535D9CE0B875F47402290 /* BinaryProtocolTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BinaryProtocolTests.swift; sourceTree = "<group>"; };
+		67A85BFDDE65B4CD8BDF6DDB /* MessageRetentionService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MessageRetentionService.swift; sourceTree = "<group>"; };
 		6DC1563390A15C042D059CF9 /* EncryptionService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EncryptionService.swift; sourceTree = "<group>"; };
 		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; };
-		822AA698BDB7BB939B62A010 /* BloomFilterTests.swift.disabled */ = {isa = PBXFileReference; lastKnownFileType = text; path = BloomFilterTests.swift.disabled; sourceTree = "<group>"; };
+		822AA698BDB7BB939B62A010 /* BloomFilterTests.swift.disabled */ = {isa = PBXFileReference; path = BloomFilterTests.swift.disabled; sourceTree = "<group>"; };
 		8DE9CDF66D4E52D268851048 /* MessagePaddingTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MessagePaddingTests.swift; sourceTree = "<group>"; };
 		96CDF6D0AF0F2052A6C7E634 /* LoggingService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoggingService.swift; sourceTree = "<group>"; };
-		997D512074C64904D75DDD40 /* bitchat.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = bitchat.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		997D512074C64904D75DDD40 /* bitchat.app */ = {isa = PBXFileReference; includeInIndex = 0; lastKnownFileType = wrapper.application; 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>"; };
+		AA4D7595A613F7ED3B386132 /* MessageRetryService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MessageRetryService.swift; sourceTree = "<group>"; };
 		C0DB1DE27F0AAB5092663E8E /* bitchatTests_iOS.xctest */ = {isa = PBXFileReference; includeInIndex = 0; lastKnownFileType = wrapper.cfbundle; path = bitchatTests_iOS.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		D5C3D880FF8AE1673B20E1E3 /* BluetoothMeshService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BluetoothMeshService.swift; sourceTree = "<group>"; };
 		D69A18D27F9A565FD6041E12 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist; path = Info.plist; sourceTree = "<group>"; };
@@ -162,7 +171,10 @@
 			children = (
 				D5C3D880FF8AE1673B20E1E3 /* BluetoothMeshService.swift */,
 				6DC1563390A15C042D059CF9 /* EncryptionService.swift */,
+				136696FC4436A02D98CE6A77 /* KeychainManager.swift */,
 				96CDF6D0AF0F2052A6C7E634 /* LoggingService.swift */,
+				67A85BFDDE65B4CD8BDF6DDB /* MessageRetentionService.swift */,
+				AA4D7595A613F7ED3B386132 /* MessageRetryService.swift */,
 				3448F84BF86A42A3CC4A9379 /* NotificationService.swift */,
 			);
 			path = Services;
@@ -272,6 +284,7 @@
 			);
 			mainGroup = 18198ED912AAF495D8AF7763;
 			minimizedProjectReferenceProxies = 1;
+			preferredProjectObjectVersion = 54;
 			projectDirPath = "";
 			projectRoot = "";
 			targets = (
@@ -331,7 +344,10 @@
 				D450CF41F207BDE1A1AAA56E /* ChatViewModel.swift in Sources */,
 				92D34E7A07C990C8A815B0CE /* ContentView.swift in Sources */,
 				739429DFDE5C5829CF70DA7D /* EncryptionService.swift in Sources */,
+				FB8819B4C84FAFEF5C36B216 /* KeychainManager.swift in Sources */,
 				72BDC660D445E2D24AB90326 /* LoggingService.swift in Sources */,
+				4E778E5A414571ACAC2A0F01 /* MessageRetentionService.swift in Sources */,
+				C99763A4761567F587D21688 /* MessageRetryService.swift in Sources */,
 				749D8CF8A362B6CD0786782D /* NotificationService.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -348,7 +364,10 @@
 				7576A357B278E5733E9D9F33 /* ChatViewModel.swift in Sources */,
 				1D9674FA5F998503831DC281 /* ContentView.swift in Sources */,
 				DDA1DFAB1FF7AADE52DC0F53 /* EncryptionService.swift in Sources */,
+				8F737CE0435792CC2AD65FCB /* KeychainManager.swift in Sources */,
 				6A624D9359BCCAAE58CE0D64 /* LoggingService.swift in Sources */,
+				4274B6016F755946FBF2513E /* MessageRetentionService.swift in Sources */,
+				CEAE115C9C3EB3C4ED82F128 /* MessageRetryService.swift in Sources */,
 				61C81ED5F679D5E973EE0C07 /* NotificationService.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -457,7 +476,6 @@
 				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;
@@ -469,12 +487,9 @@
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat;
 				PRODUCT_NAME = bitchat;
 				SDKROOT = iphoneos;
-				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
+				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = YES;
-				SUPPORTS_MACCATALYST = NO;
-				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
-				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = 1;
+				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
 		};
@@ -506,7 +521,6 @@
 				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;
@@ -518,12 +532,9 @@
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat;
 				PRODUCT_NAME = bitchat;
 				SDKROOT = iphoneos;
-				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
+				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = YES;
-				SUPPORTS_MACCATALYST = NO;
-				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
-				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = 1;
+				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
 		};

bitchat/Services/BluetoothMeshService.swift

@@ -31,12 +31,12 @@ class BluetoothMeshService: NSObject {
     static let serviceUUID = CBUUID(string: "F47B5E2D-4A9E-4C5A-9B3F-8E1D2C3A4B5C")
     static let characteristicUUID = CBUUID(string: "A1B2C3D4-E5F6-4A5B-8C9D-0E1F2A3B4C5D")
     
-    private var centralManager: CBCentralManager!
+    private var centralManager: CBCentralManager?
-    private var peripheralManager: CBPeripheralManager!
+    private var peripheralManager: CBPeripheralManager?
     private var discoveredPeripherals: [CBPeripheral] = []
     private var connectedPeripherals: [String: CBPeripheral] = [:]
     private var peripheralCharacteristics: [CBPeripheral: CBCharacteristic] = [:]
-    private var characteristic: CBMutableCharacteristic!
+    private var characteristic: CBMutableCharacteristic?
     private var subscribedCentrals: [CBCentral] = []
     private var peerNicknames: [String: String] = [:]
     private let peerNicknamesLock = NSLock()
@@ -341,20 +341,20 @@ class BluetoothMeshService: NSObject {
         
         // First, disconnect all peripherals which will trigger disconnect delegates
         for (_, peripheral) in connectedPeripherals {
-            centralManager.cancelPeripheralConnection(peripheral)
+            centralManager?.cancelPeripheralConnection(peripheral)
         }
         
         // Stop advertising
-        if peripheralManager.isAdvertising {
+        if peripheralManager?.isAdvertising == true {
-            peripheralManager.stopAdvertising()
+            peripheralManager?.stopAdvertising()
         }
         
         // Stop scanning
-        centralManager.stopScan()
+        centralManager?.stopScan()
         
         // Remove all services - this will disconnect any connected centrals
-        if peripheralManager.state == .poweredOn {
+        if peripheralManager?.state == .poweredOn {
-            peripheralManager.removeAllServices()
+            peripheralManager?.removeAllServices()
         }
         
         // Clear all tracking
@@ -375,10 +375,10 @@ class BluetoothMeshService: NSObject {
     func startServices() {
         // Starting services
         // Start both central and peripheral services
-        if centralManager.state == .poweredOn {
+        if centralManager?.state == .poweredOn {
             startScanning()
         }
-        if peripheralManager.state == .poweredOn {
+        if peripheralManager?.state == .poweredOn {
             setupPeripheral()
             startAdvertising()
         }
@@ -423,7 +423,7 @@ class BluetoothMeshService: NSObject {
     }
     
     func startAdvertising() {
-        guard peripheralManager.state == .poweredOn else { 
+        guard peripheralManager?.state == .poweredOn else { 
             return 
         }
         
@@ -438,11 +438,11 @@ class BluetoothMeshService: NSObject {
         ]
         
         isAdvertising = true
-        peripheralManager.startAdvertising(advertisementData)
+        peripheralManager?.startAdvertising(advertisementData)
     }
     
     func startScanning() {
-        guard centralManager.state == .poweredOn else { 
+        guard centralManager?.state == .poweredOn else { 
             return 
         }
         
@@ -451,7 +451,7 @@ class BluetoothMeshService: NSObject {
             CBCentralManagerScanOptionAllowDuplicatesKey: true
         ]
         
-        centralManager.scanForPeripherals(
+        centralManager?.scanForPeripherals(
             withServices: [BluetoothMeshService.serviceUUID],
             options: scanOptions
         )
@@ -474,14 +474,14 @@ class BluetoothMeshService: NSObject {
             
             if self.isActivelyScanning {
                 // Pause scanning to save battery
-                self.centralManager.stopScan()
+                self.centralManager?.stopScan()
                 self.isActivelyScanning = false
                 
                 // Schedule resume
                 DispatchQueue.main.asyncAfter(deadline: .now() + self.scanPauseDuration) { [weak self] in
                     guard let self = self else { return }
-                    if self.centralManager.state == .poweredOn {
+                    if self.centralManager?.state == .poweredOn {
-                        self.centralManager.scanForPeripherals(
+                        self.centralManager?.scanForPeripherals(
                             withServices: [BluetoothMeshService.serviceUUID],
                             options: [CBCentralManagerScanOptionAllowDuplicatesKey: true]
                         )
@@ -503,7 +503,7 @@ class BluetoothMeshService: NSObject {
         let service = CBMutableService(type: BluetoothMeshService.serviceUUID, primary: true)
         service.characteristics = [characteristic]
         
-        peripheralManager.add(service)
+        peripheralManager?.add(service)
         self.characteristic = characteristic
     }
     
@@ -844,18 +844,18 @@ class BluetoothMeshService: NSObject {
     // Emergency disconnect for panic situations
     func emergencyDisconnectAll() {
         // Stop advertising immediately
-        if peripheralManager.isAdvertising {
+        if peripheralManager?.isAdvertising == true {
-            peripheralManager.stopAdvertising()
+            peripheralManager?.stopAdvertising()
         }
         
         // Stop scanning
-        centralManager.stopScan()
+        centralManager?.stopScan()
         scanDutyCycleTimer?.invalidate()
         scanDutyCycleTimer = nil
         
         // Disconnect all peripherals
         for (_, peripheral) in connectedPeripherals {
-            centralManager.cancelPeripheralConnection(peripheral)
+            centralManager?.cancelPeripheralConnection(peripheral)
         }
         
         // Clear all peer data
@@ -1169,6 +1169,18 @@ class BluetoothMeshService: NSObject {
     private func broadcastPacket(_ packet: BitchatPacket) {
         guard let data = packet.toBinaryData() else { 
             // print("[ERROR] Failed to convert packet to binary data")
+            // Add to retry queue if this is a message packet
+            if packet.type == MessageType.message.rawValue,
+               let message = BitchatMessage.fromBinaryPayload(packet.payload) {
+                MessageRetryService.shared.addMessageForRetry(
+                    content: message.content,
+                    mentions: message.mentions,
+                    room: message.room,
+                    isPrivate: message.isPrivate,
+                    recipientPeerID: nil,
+                    recipientNickname: message.recipientNickname
+                )
+            }
             return 
         }
         
@@ -1200,16 +1212,45 @@ class BluetoothMeshService: NSObject {
         }
         
         // Send to subscribed centrals (as peripheral)
+        var sentToCentrals = 0
         if let char = characteristic, !subscribedCentrals.isEmpty {
             // Send to all subscribed centrals
-            let success = peripheralManager.updateValue(data, for: char, onSubscribedCentrals: nil)
+            let success = peripheralManager?.updateValue(data, for: char, onSubscribedCentrals: nil) ?? false
             if success {
+                sentToCentrals = subscribedCentrals.count
             } else {
             }
         } else {
             if characteristic == nil {
             }
         }
+        
+        // If no peers received the message, add to retry queue
+        if sentToPeripherals == 0 && sentToCentrals == 0 {
+            if packet.type == MessageType.message.rawValue,
+               let message = BitchatMessage.fromBinaryPayload(packet.payload) {
+                // For encrypted room messages, we need to preserve the room key
+                var roomKeyData: Data? = nil
+                if let room = message.room, message.isEncrypted {
+                    // This is an encrypted room message
+                    if let viewModel = delegate as? ChatViewModel,
+                       let roomKey = viewModel.roomKeys[room] {
+                        roomKeyData = roomKey.withUnsafeBytes { Data($0) }
+                    }
+                }
+                
+                MessageRetryService.shared.addMessageForRetry(
+                    content: message.content,
+                    mentions: message.mentions,
+                    room: message.room,
+                    isPrivate: message.isPrivate,
+                    recipientPeerID: nil,
+                    recipientNickname: message.recipientNickname,
+                    roomKey: roomKeyData
+                )
+                bitchatLog("No peers available, added message to retry queue", category: "mesh")
+            }
+        }
     }
     
     private func handleReceivedPacket(_ packet: BitchatPacket, from peerID: String, peripheral: CBPeripheral? = nil) {
@@ -1523,7 +1564,7 @@ class BluetoothMeshService: NSObject {
                                 // We have a duplicate connection - disconnect the newer one
                                 // print("[DEBUG] Duplicate connection detected for \(senderID), keeping existing")
                                 intentionalDisconnects.insert(peripheral.identifier.uuidString)
-                                centralManager.cancelPeripheralConnection(peripheral)
+                                centralManager?.cancelPeripheralConnection(peripheral)
                                 return
                             }
                             
@@ -1620,7 +1661,7 @@ class BluetoothMeshService: NSObject {
                     // Disconnect any peripherals associated with stale ID
                     if let peripheral = connectedPeripherals[stalePeerID] {
                         intentionalDisconnects.insert(peripheral.identifier.uuidString)
-                        centralManager.cancelPeripheralConnection(peripheral)
+                        centralManager?.cancelPeripheralConnection(peripheral)
                         connectedPeripherals.removeValue(forKey: stalePeerID)
                         peripheralCharacteristics.removeValue(forKey: peripheral)
                     }
@@ -2147,10 +2188,10 @@ extension BluetoothMeshService: CBCentralManagerDelegate {
         discoveredPeripherals.removeAll { $0 == peripheral }
         
         // Continue scanning for reconnection
-        if centralManager.state == .poweredOn {
+        if centralManager?.state == .poweredOn {
             // Stop and restart to ensure clean state
-            centralManager.stopScan()
+            centralManager?.stopScan()
-            centralManager.scanForPeripherals(withServices: [BluetoothMeshService.serviceUUID], options: [CBCentralManagerScanOptionAllowDuplicatesKey: false])
+            centralManager?.scanForPeripherals(withServices: [BluetoothMeshService.serviceUUID], options: [CBCentralManagerScanOptionAllowDuplicatesKey: false])
         }
     }
 }
@@ -2345,7 +2386,9 @@ extension BluetoothMeshService: CBPeripheralManagerDelegate {
                             payload: publicKeyData
                         )
                         if let data = responsePacket.toBinaryData() {
-                            peripheral.updateValue(data, for: self.characteristic, onSubscribedCentrals: [request.central])
+                            if let char = self.characteristic {
+                                peripheral.updateValue(data, for: char, onSubscribedCentrals: [request.central])
+                            }
                         }
                         
                         // Send announce immediately after key exchange
@@ -2361,7 +2404,9 @@ extension BluetoothMeshService: CBPeripheralManagerDelegate {
                                         payload: Data(vm.nickname.utf8)
                                     )
                                     if let data = announcePacket.toBinaryData() {
-                                        peripheral.updateValue(data, for: self.characteristic, onSubscribedCentrals: nil)
+                                        if let char = self.characteristic {
+                                            peripheral.updateValue(data, for: char, onSubscribedCentrals: nil)
+                                        }
                                     }
                                 }
                             }
@@ -2391,7 +2436,9 @@ extension BluetoothMeshService: CBPeripheralManagerDelegate {
             )
             
             if let data = keyPacket.toBinaryData() {
-                peripheral.updateValue(data, for: self.characteristic, onSubscribedCentrals: [central])
+                if let char = self.characteristic {
+                    peripheral.updateValue(data, for: char, onSubscribedCentrals: [central])
+                }
                 
                 // We'll send announce when we receive their key exchange
             }
@@ -2408,7 +2455,7 @@ extension BluetoothMeshService: CBPeripheralManagerDelegate {
         // Peers may be connected through multiple paths
         
         // Ensure advertising continues for reconnection
-        if peripheralManager.state == .poweredOn && !peripheralManager.isAdvertising {
+        if peripheralManager?.state == .poweredOn && peripheralManager?.isAdvertising == false {
             startAdvertising()
         }
     }

bitchat/Services/KeychainManager.swift

@@ -0,0 +1,178 @@
+//
+// KeychainManager.swift
+// bitchat
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Foundation
+import Security
+
+class KeychainManager {
+    static let shared = KeychainManager()
+    
+    private let service = "com.bitchat.passwords"
+    private let accessGroup: String? = nil // Set this if using app groups
+    
+    private init() {}
+    
+    // MARK: - Room Passwords
+    
+    func saveRoomPassword(_ password: String, for room: String) -> Bool {
+        let key = "room_\(room)"
+        return save(password, forKey: key)
+    }
+    
+    func getRoomPassword(for room: String) -> String? {
+        let key = "room_\(room)"
+        return retrieve(forKey: key)
+    }
+    
+    func deleteRoomPassword(for room: String) -> Bool {
+        let key = "room_\(room)"
+        return delete(forKey: key)
+    }
+    
+    func getAllRoomPasswords() -> [String: String] {
+        var passwords: [String: String] = [:]
+        
+        // Query all items
+        var query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecMatchLimit as String: kSecMatchLimitAll,
+            kSecReturnAttributes as String: true,
+            kSecReturnData as String: true
+        ]
+        
+        if let accessGroup = accessGroup {
+            query[kSecAttrAccessGroup as String] = accessGroup
+        }
+        
+        var result: AnyObject?
+        let status = SecItemCopyMatching(query as CFDictionary, &result)
+        
+        if status == errSecSuccess, let items = result as? [[String: Any]] {
+            for item in items {
+                if let account = item[kSecAttrAccount as String] as? String,
+                   account.hasPrefix("room_"),
+                   let data = item[kSecValueData as String] as? Data,
+                   let password = String(data: data, encoding: .utf8) {
+                    let room = String(account.dropFirst(5)) // Remove "room_" prefix
+                    passwords[room] = password
+                }
+            }
+        }
+        
+        return passwords
+    }
+    
+    // MARK: - Identity Keys
+    
+    func saveIdentityKey(_ keyData: Data, forKey key: String) -> Bool {
+        return saveData(keyData, forKey: "identity_\(key)")
+    }
+    
+    func getIdentityKey(forKey key: String) -> Data? {
+        return retrieveData(forKey: "identity_\(key)")
+    }
+    
+    // MARK: - Generic Operations
+    
+    private func save(_ value: String, forKey key: String) -> Bool {
+        guard let data = value.data(using: .utf8) else { return false }
+        return saveData(data, forKey: key)
+    }
+    
+    private func saveData(_ data: Data, forKey key: String) -> Bool {
+        // First try to update existing
+        let updateQuery: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key
+        ]
+        
+        var mutableUpdateQuery = updateQuery
+        if let accessGroup = accessGroup {
+            mutableUpdateQuery[kSecAttrAccessGroup as String] = accessGroup
+        }
+        
+        let updateAttributes: [String: Any] = [
+            kSecValueData as String: data,
+            kSecAttrAccessible as String: kSecAttrAccessibleWhenUnlockedThisDeviceOnly
+        ]
+        
+        var status = SecItemUpdate(mutableUpdateQuery as CFDictionary, updateAttributes as CFDictionary)
+        
+        if status == errSecItemNotFound {
+            // Item doesn't exist, create it
+            var createQuery = mutableUpdateQuery
+            createQuery[kSecValueData as String] = data
+            createQuery[kSecAttrAccessible as String] = kSecAttrAccessibleWhenUnlockedThisDeviceOnly
+            
+            status = SecItemAdd(createQuery as CFDictionary, nil)
+        }
+        
+        return status == errSecSuccess
+    }
+    
+    private func retrieve(forKey key: String) -> String? {
+        guard let data = retrieveData(forKey: key) else { return nil }
+        return String(data: data, encoding: .utf8)
+    }
+    
+    private func retrieveData(forKey key: String) -> Data? {
+        var query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key,
+            kSecReturnData as String: true,
+            kSecMatchLimit as String: kSecMatchLimitOne
+        ]
+        
+        if let accessGroup = accessGroup {
+            query[kSecAttrAccessGroup as String] = accessGroup
+        }
+        
+        var result: AnyObject?
+        let status = SecItemCopyMatching(query as CFDictionary, &result)
+        
+        if status == errSecSuccess, let data = result as? Data {
+            return data
+        }
+        
+        return nil
+    }
+    
+    private func delete(forKey key: String) -> Bool {
+        var query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key
+        ]
+        
+        if let accessGroup = accessGroup {
+            query[kSecAttrAccessGroup as String] = accessGroup
+        }
+        
+        let status = SecItemDelete(query as CFDictionary)
+        return status == errSecSuccess || status == errSecItemNotFound
+    }
+    
+    // MARK: - Cleanup
+    
+    func deleteAllPasswords() -> Bool {
+        var query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service
+        ]
+        
+        if let accessGroup = accessGroup {
+            query[kSecAttrAccessGroup as String] = accessGroup
+        }
+        
+        let status = SecItemDelete(query as CFDictionary)
+        return status == errSecSuccess || status == errSecItemNotFound
+    }
+}

bitchat/Services/MessageRetentionService.swift

@@ -0,0 +1,212 @@
+//
+// MessageRetentionService.swift
+// bitchat
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Foundation
+import CryptoKit
+
+struct StoredMessage: Codable {
+    let id: String
+    let sender: String
+    let senderPeerID: String?
+    let content: String
+    let timestamp: Date
+    let roomTag: String?
+    let isPrivate: Bool
+    let recipientPeerID: String?
+}
+
+class MessageRetentionService {
+    static let shared = MessageRetentionService()
+    
+    private let documentsDirectory: URL
+    private let messagesDirectory: URL
+    private let favoriteRoomsKey = "bitchat.favoriteRooms"
+    private let retentionDays = 7 // Messages retained for 7 days
+    private let encryptionKey: SymmetricKey
+    
+    private init() {
+        // Get documents directory
+        documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
+        messagesDirectory = documentsDirectory.appendingPathComponent("Messages", isDirectory: true)
+        
+        // Create messages directory if it doesn't exist
+        try? FileManager.default.createDirectory(at: messagesDirectory, withIntermediateDirectories: true)
+        
+        // Generate or retrieve encryption key from keychain
+        if let keyData = KeychainManager.shared.getIdentityKey(forKey: "messageRetentionKey") {
+            encryptionKey = SymmetricKey(data: keyData)
+        } else {
+            // Generate new key and store it
+            encryptionKey = SymmetricKey(size: .bits256)
+            _ = KeychainManager.shared.saveIdentityKey(encryptionKey.withUnsafeBytes { Data($0) }, forKey: "messageRetentionKey")
+        }
+        
+        // Clean up old messages on init
+        cleanupOldMessages()
+    }
+    
+    // MARK: - Favorite Rooms Management
+    
+    func getFavoriteRooms() -> Set<String> {
+        let rooms = UserDefaults.standard.stringArray(forKey: favoriteRoomsKey) ?? []
+        return Set(rooms)
+    }
+    
+    func toggleFavoriteRoom(_ room: String) -> Bool {
+        var favorites = getFavoriteRooms()
+        if favorites.contains(room) {
+            favorites.remove(room)
+            // Clean up messages for this room
+            deleteMessagesForRoom(room)
+        } else {
+            favorites.insert(room)
+        }
+        UserDefaults.standard.set(Array(favorites), forKey: favoriteRoomsKey)
+        return favorites.contains(room)
+    }
+    
+    // MARK: - Message Storage
+    
+    func saveMessage(_ message: BitchatMessage, forRoom room: String?) {
+        // Only save messages for favorite rooms
+        guard let room = room ?? message.room,
+              getFavoriteRooms().contains(room) else {
+            return
+        }
+        
+        // Convert to StoredMessage
+        let storedMessage = StoredMessage(
+            id: message.id,
+            sender: message.sender,
+            senderPeerID: message.senderPeerID,
+            content: message.content,
+            timestamp: message.timestamp,
+            roomTag: message.room,
+            isPrivate: message.isPrivate,
+            recipientPeerID: message.senderPeerID
+        )
+        
+        // Encode message
+        guard let messageData = try? JSONEncoder().encode(storedMessage) else { return }
+        
+        // Encrypt message
+        guard let encryptedData = encrypt(messageData) else { return }
+        
+        // Save to file
+        let fileName = "\(room)_\(message.timestamp.timeIntervalSince1970)_\(message.id).enc"
+        let fileURL = messagesDirectory.appendingPathComponent(fileName)
+        
+        try? encryptedData.write(to: fileURL)
+    }
+    
+    func loadMessagesForRoom(_ room: String) -> [BitchatMessage] {
+        guard getFavoriteRooms().contains(room) else { return [] }
+        
+        var messages: [BitchatMessage] = []
+        
+        do {
+            let files = try FileManager.default.contentsOfDirectory(at: messagesDirectory, includingPropertiesForKeys: nil)
+            let roomFiles = files.filter { $0.lastPathComponent.hasPrefix("\(room)_") }
+            
+            for fileURL in roomFiles {
+                if let encryptedData = try? Data(contentsOf: fileURL),
+                   let decryptedData = decrypt(encryptedData),
+                   let storedMessage = try? JSONDecoder().decode(StoredMessage.self, from: decryptedData) {
+                    
+                    let message = BitchatMessage(
+                        sender: storedMessage.sender,
+                        content: storedMessage.content,
+                        timestamp: storedMessage.timestamp,
+                        isRelay: false,
+                        originalSender: nil,
+                        isPrivate: storedMessage.isPrivate,
+                        recipientNickname: nil,
+                        senderPeerID: storedMessage.senderPeerID,
+                        mentions: nil,
+                        room: storedMessage.roomTag
+                    )
+                    
+                    messages.append(message)
+                }
+            }
+        } catch {
+            bitchatLog("Failed to load messages for room \(room): \(error)", category: "retention")
+        }
+        
+        return messages.sorted { $0.timestamp < $1.timestamp }
+    }
+    
+    // MARK: - Encryption
+    
+    private func encrypt(_ data: Data) -> Data? {
+        do {
+            let sealedBox = try AES.GCM.seal(data, using: encryptionKey)
+            return sealedBox.combined
+        } catch {
+            bitchatLog("Failed to encrypt message: \(error)", category: "retention")
+            return nil
+        }
+    }
+    
+    private func decrypt(_ data: Data) -> Data? {
+        do {
+            let sealedBox = try AES.GCM.SealedBox(combined: data)
+            return try AES.GCM.open(sealedBox, using: encryptionKey)
+        } catch {
+            bitchatLog("Failed to decrypt message: \(error)", category: "retention")
+            return nil
+        }
+    }
+    
+    // MARK: - Cleanup
+    
+    private func cleanupOldMessages() {
+        let cutoffDate = Date().addingTimeInterval(-TimeInterval(retentionDays * 24 * 60 * 60))
+        
+        do {
+            let files = try FileManager.default.contentsOfDirectory(at: messagesDirectory, includingPropertiesForKeys: [.creationDateKey])
+            
+            for fileURL in files {
+                if let attributes = try? fileURL.resourceValues(forKeys: [.creationDateKey]),
+                   let creationDate = attributes.creationDate,
+                   creationDate < cutoffDate {
+                    try? FileManager.default.removeItem(at: fileURL)
+                }
+            }
+        } catch {
+            bitchatLog("Failed to cleanup old messages: \(error)", category: "retention")
+        }
+    }
+    
+    func deleteMessagesForRoom(_ room: String) {
+        do {
+            let files = try FileManager.default.contentsOfDirectory(at: messagesDirectory, includingPropertiesForKeys: nil)
+            let roomFiles = files.filter { $0.lastPathComponent.hasPrefix("\(room)_") }
+            
+            for fileURL in roomFiles {
+                try? FileManager.default.removeItem(at: fileURL)
+            }
+        } catch {
+            bitchatLog("Failed to delete messages for room \(room): \(error)", category: "retention")
+        }
+    }
+    
+    func deleteAllStoredMessages() {
+        do {
+            let files = try FileManager.default.contentsOfDirectory(at: messagesDirectory, includingPropertiesForKeys: nil)
+            for fileURL in files {
+                try? FileManager.default.removeItem(at: fileURL)
+            }
+        } catch {
+            bitchatLog("Failed to delete all stored messages: \(error)", category: "retention")
+        }
+        
+        // Clear favorite rooms
+        UserDefaults.standard.removeObject(forKey: favoriteRoomsKey)
+    }
+}

bitchat/Services/MessageRetryService.swift

@@ -0,0 +1,206 @@
+//
+// MessageRetryService.swift
+// bitchat
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Foundation
+import Combine
+import CryptoKit
+
+struct RetryableMessage {
+    let id: String
+    let content: String
+    let mentions: [String]?
+    let room: String?
+    let isPrivate: Bool
+    let recipientPeerID: String?
+    let recipientNickname: String?
+    let roomKey: Data?
+    let retryCount: Int
+    let maxRetries: Int = 3
+    let nextRetryTime: Date
+}
+
+class MessageRetryService {
+    static let shared = MessageRetryService()
+    
+    private var retryQueue: [RetryableMessage] = []
+    private var retryTimer: Timer?
+    private let retryInterval: TimeInterval = 5.0 // Retry every 5 seconds
+    private let maxQueueSize = 50
+    
+    weak var meshService: BluetoothMeshService?
+    
+    private init() {
+        startRetryTimer()
+    }
+    
+    deinit {
+        retryTimer?.invalidate()
+    }
+    
+    private func startRetryTimer() {
+        retryTimer = Timer.scheduledTimer(withTimeInterval: retryInterval, repeats: true) { [weak self] _ in
+            self?.processRetryQueue()
+        }
+    }
+    
+    func addMessageForRetry(
+        content: String,
+        mentions: [String]? = nil,
+        room: String? = nil,
+        isPrivate: Bool = false,
+        recipientPeerID: String? = nil,
+        recipientNickname: String? = nil,
+        roomKey: Data? = nil
+    ) {
+        // Don't queue if we're at capacity
+        guard retryQueue.count < maxQueueSize else {
+            bitchatLog("Retry queue full, dropping message", category: "retry")
+            return
+        }
+        
+        let retryMessage = RetryableMessage(
+            id: UUID().uuidString,
+            content: content,
+            mentions: mentions,
+            room: room,
+            isPrivate: isPrivate,
+            recipientPeerID: recipientPeerID,
+            recipientNickname: recipientNickname,
+            roomKey: roomKey,
+            retryCount: 0,
+            nextRetryTime: Date().addingTimeInterval(retryInterval)
+        )
+        
+        retryQueue.append(retryMessage)
+        bitchatLog("Added message to retry queue: \(content.prefix(20))...", category: "retry")
+    }
+    
+    private func processRetryQueue() {
+        guard let meshService = meshService else { return }
+        
+        let now = Date()
+        var messagesToRetry: [RetryableMessage] = []
+        var updatedQueue: [RetryableMessage] = []
+        
+        for message in retryQueue {
+            if message.nextRetryTime <= now {
+                messagesToRetry.append(message)
+            } else {
+                updatedQueue.append(message)
+            }
+        }
+        
+        retryQueue = updatedQueue
+        
+        for message in messagesToRetry {
+            // Check if we should still retry
+            if message.retryCount >= message.maxRetries {
+                bitchatLog("Max retries reached for message: \(message.content.prefix(20))...", category: "retry")
+                continue
+            }
+            
+            // Check connectivity before retrying
+            let viewModel = meshService.delegate as? ChatViewModel
+            let connectedPeers = viewModel?.connectedPeers ?? []
+            
+            if message.isPrivate {
+                // For private messages, check if recipient is connected
+                if let recipientID = message.recipientPeerID,
+                   connectedPeers.contains(recipientID) {
+                    // Retry private message
+                    meshService.sendPrivateMessage(
+                        message.content,
+                        to: recipientID,
+                        recipientNickname: message.recipientNickname ?? "unknown"
+                    )
+                    bitchatLog("Retried private message to \(recipientID)", category: "retry")
+                } else {
+                    // Recipient not connected, keep in queue with updated retry time
+                    var updatedMessage = message
+                    updatedMessage = RetryableMessage(
+                        id: message.id,
+                        content: message.content,
+                        mentions: message.mentions,
+                        room: message.room,
+                        isPrivate: message.isPrivate,
+                        recipientPeerID: message.recipientPeerID,
+                        recipientNickname: message.recipientNickname,
+                        roomKey: message.roomKey,
+                        retryCount: message.retryCount + 1,
+                        nextRetryTime: Date().addingTimeInterval(retryInterval * Double(message.retryCount + 2))
+                    )
+                    retryQueue.append(updatedMessage)
+                }
+            } else if let room = message.room, let roomKeyData = message.roomKey {
+                // For room messages, check if we have peers in the room
+                if !connectedPeers.isEmpty {
+                    // Recreate SymmetricKey from data
+                    let roomKey = SymmetricKey(data: roomKeyData)
+                    meshService.sendEncryptedRoomMessage(
+                        message.content,
+                        mentions: message.mentions ?? [],
+                        room: room,
+                        roomKey: roomKey
+                    )
+                    bitchatLog("Retried encrypted room message to \(room)", category: "retry")
+                } else {
+                    // No peers connected, keep in queue
+                    var updatedMessage = message
+                    updatedMessage = RetryableMessage(
+                        id: message.id,
+                        content: message.content,
+                        mentions: message.mentions,
+                        room: message.room,
+                        isPrivate: message.isPrivate,
+                        recipientPeerID: message.recipientPeerID,
+                        recipientNickname: message.recipientNickname,
+                        roomKey: message.roomKey,
+                        retryCount: message.retryCount + 1,
+                        nextRetryTime: Date().addingTimeInterval(retryInterval * Double(message.retryCount + 2))
+                    )
+                    retryQueue.append(updatedMessage)
+                }
+            } else {
+                // Regular message
+                if !connectedPeers.isEmpty {
+                    meshService.sendMessage(
+                        message.content,
+                        mentions: message.mentions ?? [],
+                        room: message.room
+                    )
+                    bitchatLog("Retried regular message", category: "retry")
+                } else {
+                    // No peers connected, keep in queue
+                    var updatedMessage = message
+                    updatedMessage = RetryableMessage(
+                        id: message.id,
+                        content: message.content,
+                        mentions: message.mentions,
+                        room: message.room,
+                        isPrivate: message.isPrivate,
+                        recipientPeerID: message.recipientPeerID,
+                        recipientNickname: message.recipientNickname,
+                        roomKey: message.roomKey,
+                        retryCount: message.retryCount + 1,
+                        nextRetryTime: Date().addingTimeInterval(retryInterval * Double(message.retryCount + 2))
+                    )
+                    retryQueue.append(updatedMessage)
+                }
+            }
+        }
+    }
+    
+    func clearRetryQueue() {
+        retryQueue.removeAll()
+        bitchatLog("Cleared retry queue", category: "retry")
+    }
+    
+    func getRetryQueueCount() -> Int {
+        return retryQueue.count
+    }
+}

bitchat/ViewModels/ChatViewModel.swift

@@ -56,7 +56,7 @@ class ChatViewModel: ObservableObject {
     private let joinedRoomsKey = "bitchat.joinedRooms"
     private let passwordProtectedRoomsKey = "bitchat.passwordProtectedRooms"
     private let roomCreatorsKey = "bitchat.roomCreators"
-    private let roomPasswordsKey = "bitchat.roomPasswords"
+    // private let roomPasswordsKey = "bitchat.roomPasswords" // Now using Keychain
     private let roomKeyCommitmentsKey = "bitchat.roomKeyCommitments"
     private var nicknameSaveTimer: Timer?
     
@@ -79,6 +79,9 @@ class ChatViewModel: ObservableObject {
         // Start mesh service immediately
         meshService.startServices()
         
+        // Set up message retry service
+        MessageRetryService.shared.meshService = meshService
+        
         // Request notification permission
         NotificationService.shared.requestAuthorization()
     }
@@ -147,20 +150,22 @@ class ChatViewModel: ObservableObject {
             roomKeyCommitments = savedCommitments
         }
         
-        // Load room passwords (encrypted would be better, but keeping simple for now)
+        // Load room passwords from Keychain
-        if let savedPasswords = userDefaults.dictionary(forKey: roomPasswordsKey) as? [String: String] {
+        let savedPasswords = KeychainManager.shared.getAllRoomPasswords()
-            roomPasswords = savedPasswords
+        roomPasswords = savedPasswords
-            // Derive keys for all saved passwords
+        // Derive keys for all saved passwords
-            for (room, password) in savedPasswords {
+        for (room, password) in savedPasswords {
-                roomKeys[room] = deriveRoomKey(from: password, roomName: room)
+            roomKeys[room] = deriveRoomKey(from: password, roomName: room)
-            }
         }
     }
     
     private func saveRoomData() {
         userDefaults.set(Array(passwordProtectedRooms), forKey: passwordProtectedRoomsKey)
         userDefaults.set(roomCreators, forKey: roomCreatorsKey)
-        userDefaults.set(roomPasswords, forKey: roomPasswordsKey)
+        // Save passwords to Keychain instead of UserDefaults
+        for (room, password) in roomPasswords {
+            _ = KeychainManager.shared.saveRoomPassword(password, for: room)
+        }
         userDefaults.set(roomKeyCommitments, forKey: roomKeyCommitmentsKey)
         userDefaults.synchronize()
     }
@@ -304,7 +309,9 @@ class ChatViewModel: ObservableObject {
                 
                 // Store the key (tentatively if not verified)
                 roomKeys[roomTag] = key
-                roomPasswords[roomTag] = password  // Store for convenience (local only)
+                roomPasswords[roomTag] = password
+                // Save password to Keychain
+                _ = KeychainManager.shared.saveRoomPassword(password, for: roomTag)
                 
                 if passwordVerified {
                     bitchatLog("Password stored for room \(roomTag) - verified", category: "room")
@@ -352,6 +359,24 @@ class ChatViewModel: ObservableObject {
             roomMessages[roomTag] = []
         }
         
+        // Load saved messages if this is a favorite room
+        if MessageRetentionService.shared.getFavoriteRooms().contains(roomTag) {
+            let savedMessages = MessageRetentionService.shared.loadMessagesForRoom(roomTag)
+            if !savedMessages.isEmpty {
+                // Merge saved messages with current messages, avoiding duplicates
+                var existingMessageIDs = Set(roomMessages[roomTag]?.map { $0.id } ?? [])
+                for savedMessage in savedMessages {
+                    if !existingMessageIDs.contains(savedMessage.id) {
+                        roomMessages[roomTag]?.append(savedMessage)
+                        existingMessageIDs.insert(savedMessage.id)
+                    }
+                }
+                // Sort by timestamp
+                roomMessages[roomTag]?.sort { $0.timestamp < $1.timestamp }
+                bitchatLog("Loaded \(savedMessages.count) saved messages for favorite room \(roomTag)", category: "retention")
+            }
+        }
+        
         // Hide password prompt if it was showing
         showPasswordPrompt = false
         passwordPromptRoom = nil
@@ -377,6 +402,8 @@ class ChatViewModel: ObservableObject {
         roomMembers.removeValue(forKey: room)
         roomKeys.removeValue(forKey: room)
         roomPasswords.removeValue(forKey: room)
+        // Delete password from Keychain
+        _ = KeychainManager.shared.deleteRoomPassword(for: room)
     }
     
     // Password management
@@ -406,6 +433,8 @@ class ChatViewModel: ObservableObject {
         roomKeys[room] = key
         roomPasswords[room] = password
         passwordProtectedRooms.insert(room)
+        // Save password to Keychain
+        _ = KeychainManager.shared.saveRoomPassword(password, for: room)
         
         // Compute and store key commitment for verification
         let commitment = computeKeyCommitment(for: key)
@@ -447,6 +476,8 @@ class ChatViewModel: ObservableObject {
         roomPasswords.removeValue(forKey: room)
         roomKeyCommitments.removeValue(forKey: room)
         passwordProtectedRooms.remove(room)
+        // Delete password from Keychain
+        _ = KeychainManager.shared.deleteRoomPassword(for: room)
         
         // Save room data
         saveRoomData()
@@ -572,6 +603,8 @@ class ChatViewModel: ObservableObject {
         let newKey = deriveRoomKey(from: newPassword, roomName: currentRoom)
         roomKeys[currentRoom] = newKey
         roomPasswords[currentRoom] = newPassword
+        // Update password in Keychain
+        _ = KeychainManager.shared.saveRoomPassword(newPassword, for: currentRoom)
         
         // Compute new key commitment
         let newCommitment = computeKeyCommitment(for: newKey)
@@ -785,6 +818,11 @@ class ChatViewModel: ObservableObject {
                 }
                 roomMessages[room]?.append(message)
                 
+                // Save message if room is a favorite
+                if MessageRetentionService.shared.getFavoriteRooms().contains(room) {
+                    MessageRetentionService.shared.saveMessage(message, forRoom: room)
+                }
+                
                 // Track ourselves as a room member
                 if roomMembers[room] == nil {
                     roomMembers[room] = Set()
@@ -873,25 +911,63 @@ class ChatViewModel: ObservableObject {
         privateChats.removeAll()
         unreadPrivateMessages.removeAll()
         
+        // Clear all room data
+        joinedRooms.removeAll()
+        currentRoom = nil
+        roomMessages.removeAll()
+        unreadRoomMessages.removeAll()
+        roomMembers.removeAll()
+        roomPasswords.removeAll()
+        roomKeys.removeAll()
+        passwordProtectedRooms.removeAll()
+        roomCreators.removeAll()
+        roomKeyCommitments.removeAll()
+        showPasswordPrompt = false
+        passwordPromptRoom = nil
+        
+        // Clear all keychain passwords
+        _ = KeychainManager.shared.deleteAllPasswords()
+        
+        // Clear all retained messages
+        MessageRetentionService.shared.deleteAllStoredMessages()
+        
+        // Clear message retry queue
+        MessageRetryService.shared.clearRetryQueue()
+        
+        // Clear persisted room data from UserDefaults
+        userDefaults.removeObject(forKey: joinedRoomsKey)
+        userDefaults.removeObject(forKey: passwordProtectedRoomsKey)
+        userDefaults.removeObject(forKey: roomCreatorsKey)
+        userDefaults.removeObject(forKey: roomKeyCommitmentsKey)
+        
         // Reset nickname to anonymous
         nickname = "anon\(Int.random(in: 1000...9999))"
         saveNickname()
         
         // Clear favorites
         favoritePeers.removeAll()
+        peerIDToPublicKeyFingerprint.removeAll()
         saveFavorites()
         
         // Clear autocomplete state
         autocompleteSuggestions.removeAll()
         showAutocomplete = false
+        autocompleteRange = nil
+        selectedAutocompleteIndex = 0
+        
+        // Clear selected private chat
+        selectedPrivateChatPeer = nil
         
         // Disconnect from all peers
         meshService.emergencyDisconnectAll()
         
+        // Force immediate UserDefaults synchronization
+        userDefaults.synchronize()
+        
         // Force UI update
         objectWillChange.send()
         
-        // print("[PANIC] All data cleared for safety")
+        bitchatLog("PANIC: All data cleared for safety", category: "security")
     }
     
     
@@ -1416,6 +1492,59 @@ extension ChatViewModel: BitchatDelegate {
                 )
                 messages.append(systemMessage)
             }
+        case "/discover":
+            // Discover public rooms
+            var publicRooms: [String] = []
+            var protectedRooms: [String] = []
+            
+            // Find rooms from messages we've seen
+            for msg in messages {
+                if let room = msg.room {
+                    if passwordProtectedRooms.contains(room) {
+                        if !protectedRooms.contains(room) {
+                            protectedRooms.append(room)
+                        }
+                    } else {
+                        if !publicRooms.contains(room) {
+                            publicRooms.append(room)
+                        }
+                    }
+                }
+            }
+            
+            // Also check room messages we've cached
+            for (room, _) in roomMessages {
+                if passwordProtectedRooms.contains(room) {
+                    if !protectedRooms.contains(room) {
+                        protectedRooms.append(room)
+                    }
+                } else {
+                    if !publicRooms.contains(room) {
+                        publicRooms.append(room)
+                    }
+                }
+            }
+            
+            var discoveryMessage = ""
+            if publicRooms.isEmpty && protectedRooms.isEmpty {
+                discoveryMessage = "no rooms discovered yet. rooms appear as people use them."
+            } else {
+                if !publicRooms.isEmpty {
+                    discoveryMessage += "public rooms:\n" + publicRooms.sorted().joined(separator: ", ")
+                }
+                if !protectedRooms.isEmpty {
+                    if !discoveryMessage.isEmpty { discoveryMessage += "\n\n" }
+                    discoveryMessage += "protected rooms:\n" + protectedRooms.sorted().map { "\($0) 🔒" }.joined(separator: ", ")
+                }
+            }
+            
+            let systemMessage = BitchatMessage(
+                sender: "system",
+                content: discoveryMessage,
+                timestamp: Date(),
+                isRelay: false
+            )
+            messages.append(systemMessage)
         case "/transfer":
             // Transfer room ownership
             let parts = command.split(separator: " ", maxSplits: 1).map(String.init)
@@ -1469,6 +1598,65 @@ extension ChatViewModel: BitchatDelegate {
                 messages.removeAll()
                 bitchatLog("cleared main chat", category: "chat")
             }
+        case "/favorite", "/fav":
+            // Toggle favorite status for current room
+            guard let room = currentRoom else {
+                let systemMessage = BitchatMessage(
+                    sender: "system",
+                    content: "you must be in a room to mark it as favorite.",
+                    timestamp: Date(),
+                    isRelay: false
+                )
+                messages.append(systemMessage)
+                break
+            }
+            
+            let isFavorite = MessageRetentionService.shared.toggleFavoriteRoom(room)
+            let status = isFavorite ? "added to" : "removed from"
+            
+            // If just marked as favorite, load any previously saved messages
+            if isFavorite {
+                let savedMessages = MessageRetentionService.shared.loadMessagesForRoom(room)
+                if !savedMessages.isEmpty {
+                    // Merge saved messages with current messages, avoiding duplicates
+                    var existingMessageIDs = Set(roomMessages[room]?.map { $0.id } ?? [])
+                    for savedMessage in savedMessages {
+                        if !existingMessageIDs.contains(savedMessage.id) {
+                            if roomMessages[room] == nil {
+                                roomMessages[room] = []
+                            }
+                            roomMessages[room]?.append(savedMessage)
+                            existingMessageIDs.insert(savedMessage.id)
+                        }
+                    }
+                    // Sort by timestamp
+                    roomMessages[room]?.sort { $0.timestamp < $1.timestamp }
+                    
+                    let systemMessage = BitchatMessage(
+                        sender: "system",
+                        content: "room \(room) \(status) favorites. loaded \(savedMessages.count) saved messages.",
+                        timestamp: Date(),
+                        isRelay: false
+                    )
+                    messages.append(systemMessage)
+                } else {
+                    let systemMessage = BitchatMessage(
+                        sender: "system",
+                        content: "room \(room) \(status) favorites.",
+                        timestamp: Date(),
+                        isRelay: false
+                    )
+                    messages.append(systemMessage)
+                }
+            } else {
+                let systemMessage = BitchatMessage(
+                    sender: "system",
+                    content: "room \(room) \(status) favorites.",
+                    timestamp: Date(),
+                    isRelay: false
+                )
+                messages.append(systemMessage)
+            }
         default:
             // Unknown command
             let systemMessage = BitchatMessage(
@@ -1656,6 +1844,11 @@ extension ChatViewModel: BitchatDelegate {
                 roomMessages[room]?.append(messageToAdd)
                 roomMessages[room]?.sort { $0.timestamp < $1.timestamp }
                 
+                // Save message if room is a favorite
+                if MessageRetentionService.shared.getFavoriteRooms().contains(room) {
+                    MessageRetentionService.shared.saveMessage(messageToAdd, forRoom: room)
+                }
+                
                 // Track room members - only track the sender as a member
                 if roomMembers[room] == nil {
                     roomMembers[room] = Set()

bitchat/Views/AppInfoView.swift

@@ -64,6 +64,15 @@ struct AppInfoView: View {
                         
                         FeatureRow(icon: "at", title: "Mentions",
                                   description: "Use @nickname to notify specific users")
+                        
+                        FeatureRow(icon: "number", title: "Rooms",
+                                  description: "Create #rooms for topic-based conversations")
+                        
+                        FeatureRow(icon: "lock.fill", title: "Password Rooms",
+                                  description: "Secure rooms with passwords and AES encryption")
+                        
+                        FeatureRow(icon: "mic.fill", title: "Voice Notes",
+                                  description: "Push-to-talk voice messages with compression")
                     }
                     
                     // Privacy
@@ -86,9 +95,10 @@ struct AppInfoView: View {
                         
                         VStack(alignment: .leading, spacing: 8) {
                             Text("• Set your nickname in the header")
-                            Text("• Tap the people counter to see connected peers")
+                            Text("• Swipe left or tap room name for sidebar")
                             Text("• Tap a peer to start a private chat")
                             Text("• Use @nickname to mention someone")
+                            Text("• Use #roomname to create/join rooms")
                             Text("• Triple-tap the logo for panic mode")
                         }
                         .font(.system(size: 14, design: .monospaced))
@@ -106,6 +116,9 @@ struct AppInfoView: View {
                             Text("Store & Forward: 12h for all, ∞ for favorites")
                             Text("Battery: Adaptive scanning based on level")
                             Text("Platform: Universal (iOS, iPadOS, macOS)")
+                            Text("Rooms: Password-protected with key commitments")
+                            Text("Commands: /j /m /w /list /pass /favorite /discover")
+                            Text("Storage: Keychain for passwords, encrypted retention")
                         }
                         .font(.system(size: 14, design: .monospaced))
                         .foregroundColor(textColor)
@@ -184,6 +197,15 @@ struct AppInfoView: View {
                         
                         FeatureRow(icon: "at", title: "Mentions",
                                   description: "Use @nickname to notify specific users")
+                        
+                        FeatureRow(icon: "number", title: "Rooms",
+                                  description: "Create #rooms for topic-based conversations")
+                        
+                        FeatureRow(icon: "lock.fill", title: "Password Rooms",
+                                  description: "Secure rooms with passwords and AES encryption")
+                        
+                        FeatureRow(icon: "mic.fill", title: "Voice Notes",
+                                  description: "Push-to-talk voice messages with compression")
                     }
                     
                     // Privacy
@@ -206,9 +228,10 @@ struct AppInfoView: View {
                         
                         VStack(alignment: .leading, spacing: 8) {
                             Text("• Set your nickname in the header")
-                            Text("• Tap the people counter to see connected peers")
+                            Text("• Swipe left or tap room name for sidebar")
                             Text("• Tap a peer to start a private chat")
                             Text("• Use @nickname to mention someone")
+                            Text("• Use #roomname to create/join rooms")
                             Text("• Triple-tap the logo for panic mode")
                         }
                         .font(.system(size: 14, design: .monospaced))
@@ -226,6 +249,9 @@ struct AppInfoView: View {
                             Text("Store & Forward: 12h for all, ∞ for favorites")
                             Text("Battery: Adaptive scanning based on level")
                             Text("Platform: Universal (iOS, iPadOS, macOS)")
+                            Text("Rooms: Password-protected with key commitments")
+                            Text("Commands: /j /m /w /list /pass /favorite /discover")
+                            Text("Storage: Keychain for passwords, encrypted retention")
                         }
                         .font(.system(size: 14, design: .monospaced))
                         .foregroundColor(textColor)

bitchat/Views/ContentView.swift

@@ -513,7 +513,9 @@ struct ContentView: View {
                         "/m": "send private message",
                         "/clear": "clear chat messages",
                         "/transfer": "transfer room ownership",
-                        "/pass": "change room password"
+                        "/pass": "change room password",
+                        "/favorite": "toggle room retention",
+                        "/discover": "find active rooms"
                     ]
                     
                     ForEach(commandSuggestions, id: \.self) { command in
@@ -595,7 +597,9 @@ struct ContentView: View {
                             ("/m", "send private message"),
                             ("/clear", "clear chat messages"),
                             ("/transfer", "transfer room ownership"),
-                            ("/pass", "change room password")
+                            ("/pass", "change room password"),
+                            ("/favorite", "toggle room retention"),
+                            ("/discover", "find active rooms")
                         ]
                         let input = newValue.lowercased()
                         commandSuggestions = commandDescriptions