Add network availability notifications when bitchatters are nearby

- Show notification when network transitions from empty to having peers
- Single notification per session, resets when network becomes empty
- Background Bluetooth modes enabled for iOS
- Generic message: 'bitchatters nearby\! 1 person around' or 'X people around'

bitchat.xcodeproj/project.pbxproj

@@ -193,18 +193,18 @@
 		3FA8FF26ABDC1C642A8C7AE5 /* BitchatMessageTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BitchatMessageTests.swift; sourceTree = "<group>"; };
 		527EB217EFDFAD4CF1C91F07 /* bitchat.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = bitchat.entitlements; sourceTree = "<group>"; };
 		53D535D9CE0B875F47402290 /* BinaryProtocolTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BinaryProtocolTests.swift; sourceTree = "<group>"; };
-		61F92EBA29C47C0FCC482F1F /* bitchatShareExtension.appex */ = {isa = PBXFileReference; includeInIndex = 0; lastKnownFileType = "wrapper.extensionkit-extension"; path = bitchatShareExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
+		61F92EBA29C47C0FCC482F1F /* bitchatShareExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = bitchatShareExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
 		6E2446380E7A44E49A35B664 /* IdentityModels.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IdentityModels.swift; sourceTree = "<group>"; };
 		763E0DBA9492A654FC0CDCB9 /* AppInfoView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppInfoView.swift; sourceTree = "<group>"; };
 		8DE9CDF66D4E52D268851048 /* MessagePaddingTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MessagePaddingTests.swift; sourceTree = "<group>"; };
-		8F3A7C058C2C8E1A06C8CF8B /* bitchat_macOS.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; name = bitchat_macOS.app; path = bitchat.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		8F3A7C058C2C8E1A06C8CF8B /* bitchat.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = bitchat.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		95F16C3A4A5621C74461D8D3 /* LaunchScreen.storyboard */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; path = LaunchScreen.storyboard; sourceTree = "<group>"; };
 		96D0D41CA19EE5A772AA8434 /* bitchat.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = bitchat.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		9AC141774F6671FCDC347DC7 /* LinkPreviewView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LinkPreviewView.swift; sourceTree = "<group>"; };
 		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; };
+		C0DB1DE27F0AAB5092663E8E /* bitchatTests_iOS.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = bitchatTests_iOS.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		C1B378C16594575FCC7F9C75 /* ShareViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ShareViewController.swift; sourceTree = "<group>"; };
 		CB043CA5EEB9AC8B07D61E97 /* OptimizedBloomFilter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OptimizedBloomFilter.swift; sourceTree = "<group>"; };
 		D5C3D880FF8AE1673B20E1E3 /* BluetoothMeshService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BluetoothMeshService.swift; sourceTree = "<group>"; };
@@ -293,7 +293,7 @@
 			isa = PBXGroup;
 			children = (
 				96D0D41CA19EE5A772AA8434 /* bitchat.app */,
-				8F3A7C058C2C8E1A06C8CF8B /* bitchat_macOS.app */,
+				8F3A7C058C2C8E1A06C8CF8B /* bitchat.app */,
 				61F92EBA29C47C0FCC482F1F /* bitchatShareExtension.appex */,
 				C0DB1DE27F0AAB5092663E8E /* bitchatTests_iOS.xctest */,
 				03C57F452B55FD0FD8F51421 /* bitchatTests_macOS.xctest */,
@@ -392,7 +392,7 @@
 			packageProductDependencies = (
 			);
 			productName = bitchat_macOS;
-			productReference = 8F3A7C058C2C8E1A06C8CF8B /* bitchat_macOS.app */;
+			productReference = 8F3A7C058C2C8E1A06C8CF8B /* bitchat.app */;
 			productType = "com.apple.product-type.application";
 		};
 		47FF23248747DD7CB666CB91 /* bitchatTests_macOS */ = {
@@ -475,7 +475,7 @@
 			isa = PBXProject;
 			attributes = {
 				BuildIndependentTargetsInParallel = YES;
-				LastUpgradeCheck = 1430;
+				LastUpgradeCheck = 1640;
 				TargetAttributes = {
 					0576A29205865664C0937536 = {
 						DevelopmentTeam = L3N5LHJD5Y;
@@ -704,7 +704,6 @@
 				CODE_SIGNING_ALLOWED = YES;
 				CODE_SIGNING_REQUIRED = YES;
 				CODE_SIGN_STYLE = Automatic;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				INFOPLIST_FILE = bitchatTests/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -727,7 +726,6 @@
 				CODE_SIGNING_ALLOWED = YES;
 				CODE_SIGNING_REQUIRED = YES;
 				CODE_SIGN_STYLE = Automatic;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				INFOPLIST_FILE = bitchatTests/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -751,7 +749,7 @@
 				CODE_SIGNING_REQUIRED = YES;
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
+				DEAD_CODE_STRIPPING = YES;
 				INFOPLIST_FILE = bitchatTests/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
@@ -774,7 +772,6 @@
 				CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION = YES;
 				CODE_SIGN_ENTITLEMENTS = bitchatShareExtension/bitchatShareExtension.entitlements;
 				CODE_SIGN_STYLE = Automatic;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				INFOPLIST_FILE = bitchatShareExtension/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -799,7 +796,6 @@
 				CODE_SIGN_ENTITLEMENTS = bitchat/bitchat.entitlements;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = bitchat/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = bitchat;
@@ -829,7 +825,7 @@
 				CODE_SIGNING_REQUIRED = YES;
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
+				DEAD_CODE_STRIPPING = YES;
 				INFOPLIST_FILE = bitchatTests/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
@@ -854,7 +850,6 @@
 				CODE_SIGN_ENTITLEMENTS = bitchat/bitchat.entitlements;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = bitchat/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = bitchat;
@@ -886,7 +881,7 @@
 				CODE_SIGN_ENTITLEMENTS = "bitchat/bitchat-macOS.entitlements";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
+				DEAD_CODE_STRIPPING = YES;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = bitchat/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -896,6 +891,7 @@
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat;
 				PRODUCT_NAME = bitchat;
+				REGISTER_APP_GROUPS = YES;
 				SDKROOT = macosx;
 				SWIFT_VERSION = 5.0;
 			};
@@ -936,9 +932,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
@@ -969,7 +968,7 @@
 				CODE_SIGN_ENTITLEMENTS = "bitchat/bitchat-macOS.entitlements";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
+				DEAD_CODE_STRIPPING = YES;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = bitchat/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -979,6 +978,7 @@
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat;
 				PRODUCT_NAME = bitchat;
+				REGISTER_APP_GROUPS = YES;
 				SDKROOT = macosx;
 				SWIFT_VERSION = 5.0;
 			};
@@ -1019,9 +1019,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
+				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -1057,7 +1060,6 @@
 				CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION = YES;
 				CODE_SIGN_ENTITLEMENTS = bitchatShareExtension/bitchatShareExtension.entitlements;
 				CODE_SIGN_STYLE = Automatic;
-				DEVELOPMENT_TEAM = L3N5LHJD5Y;
 				INFOPLIST_FILE = bitchatShareExtension/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (

bitchat/Info.plist

@@ -35,6 +35,12 @@
 	<string>bitchat uses Bluetooth to create a secure mesh network for chatting with nearby users.</string>
 	<key>NSBluetoothPeripheralUsageDescription</key>
 	<string>bitchat uses Bluetooth to discover and connect with other bitchat users nearby.</string>
+	<key>UIBackgroundModes</key>
+	<array>
+		<string>bluetooth-central</string>
+		<string>bluetooth-peripheral</string>
+		<string>remote-notification</string>
+	</array>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
 	<key>UISupportedInterfaceOrientations</key>

bitchat/Services/BluetoothMeshService.swift

@@ -81,6 +81,7 @@ class BluetoothMeshService: NSObject {
     private let maxTTL: UInt8 = 7  // Maximum hops for long-distance delivery
     private var announcedToPeers = Set<String>()  // Track which peers we've announced to
     private var announcedPeers = Set<String>()  // Track peers who have already been announced
+    private var hasNotifiedNetworkAvailable = false  // Track if we've notified about network availability
     private var intentionalDisconnects = Set<String>()  // Track peripherals we're disconnecting intentionally
     private var peerLastSeenTimestamps = LRUCache<String, Date>(maxSize: 100)  // Bounded cache for peer timestamps
     private var cleanupTimer: Timer?  // Timer to clean up stale peers
@@ -599,6 +600,7 @@ class BluetoothMeshService: NSObject {
             activePeers.removeAll()
         }
         announcedPeers.removeAll()
+        hasNotifiedNetworkAvailable = false
         
         // Clear announcement tracking
         announcedToPeers.removeAll()
@@ -1231,6 +1233,7 @@ class BluetoothMeshService: NSObject {
         peripheralRSSI.removeAll()
         announcedToPeers.removeAll()
         announcedPeers.removeAll()
+        hasNotifiedNetworkAvailable = false
         processedMessages.removeAll()
         incomingFragments.removeAll()
         fragmentMetadata.removeAll()
@@ -1331,6 +1334,12 @@ class BluetoothMeshService: NSObject {
         
         if !peersToRemove.isEmpty {
             notifyPeerListUpdate()
+            
+            // Reset notification flag if network is now empty
+            let currentNetworkSize = collectionsQueue.sync { activePeers.count }
+            if currentNetworkSize == 0 {
+                hasNotifiedNetworkAvailable = false
+            }
         }
     }
     
@@ -2079,6 +2088,13 @@ class BluetoothMeshService: NSObject {
                         }
                         self.notifyPeerListUpdate(immediate: true)
                         
+                        // Send network available notification if this is the first peer we've seen
+                        let currentNetworkSize = collectionsQueue.sync { self.activePeers.count }
+                        if currentNetworkSize > 0 && !hasNotifiedNetworkAvailable {
+                            hasNotifiedNetworkAvailable = true
+                            NotificationService.shared.sendNetworkAvailableNotification(peerCount: currentNetworkSize)
+                        }
+                        
                         DispatchQueue.main.async {
                             // Check if this is a favorite peer and send notification
                             // Note: This might not work immediately if key exchange hasn't happened yet
@@ -2928,6 +2944,12 @@ extension BluetoothMeshService: CBCentralManagerDelegate {
                 DispatchQueue.main.async {
                     self.delegate?.didDisconnectFromPeer(peerID)
                 }
+                
+                // Reset notification flag if network is now empty
+                let currentNetworkSize = collectionsQueue.sync { activePeers.count }
+                if currentNetworkSize == 0 {
+                    hasNotifiedNetworkAvailable = false
+                }
             }
             self.notifyPeerListUpdate()
         }

bitchat/Services/NotificationService.swift

@@ -77,10 +77,18 @@ class NotificationService {
     }
     
     func sendFavoriteOnlineNotification(nickname: String) {
-        let title = "⭐ \(nickname) is online"
+        let title = "⭐ \(nickname) is online!"
         let body = "wanna get in there?"
         let identifier = "favorite-online-\(UUID().uuidString)"
         
         sendLocalNotification(title: title, body: body, identifier: identifier)
     }
+    
+    func sendNetworkAvailableNotification(peerCount: Int) {
+        let title = "👥 bitchatters nearby!"
+        let body = peerCount == 1 ? "1 person around" : "\(peerCount) people around"
+        let identifier = "network-available"
+        
+        sendLocalNotification(title: title, body: body, identifier: identifier)
+    }
 }

bitchat/Views/AppInfoView.swift

@@ -18,7 +18,7 @@ struct AppInfoView: View {
     
     // MARK: - Constants
     private enum Strings {
-        static let appName = "bitchat"
+        static let appName = "bitchat/"
         static let tagline = "mesh sidegroupchat"
         
         enum Features {