Harden text formatting against Unicode range mismatches

- Use NSString.length for all NSRange regex scans
- Guard string slicing when lastEnd > match.lowerBound
- Advance lastEnd safely to avoid backtracking overlaps
- Apply to formatMessageContent, formatMessage, formatMessageAsText, parseMentions

.gitignore

@@ -71,3 +71,7 @@ __pycache__/
 # Local build results
 .Result*/
 .Result*.xcresult/
+TestResult.xcresult/
+*.xcresult/
+build.log
+*.log

README.md

@@ -2,7 +2,7 @@
 
 ## bitchat
 
-A decentralized peer-to-peer messaging app that works over Bluetooth mesh networks. No internet required, no servers, no phone numbers. It's the side-groupchat. 
+A decentralized peer-to-peer messaging app with dual transport architecture: local Bluetooth mesh networks for offline communication and internet-based Nostr protocol for global reach. No accounts, no phone numbers, no central servers. It's the side-groupchat.
 
 [bitchat.free](http://bitchat.free)
 
@@ -11,50 +11,99 @@ A decentralized peer-to-peer messaging app that works over Bluetooth mesh networ
 > [!WARNING]
 > Private messages have not received external security review and may contain vulnerabilities. Do not use for sensitive use cases, and do not rely on its security until it has been reviewed. Now uses the [Noise Protocol](http://www.noiseprotocol.org) for identity and encryption. Public local chat (the main feature) has no security concerns.
 
-
 ## License
 
 This project is released into the public domain. See the [LICENSE](LICENSE) file for details.
 
-
 ## Features
 
+- **Dual Transport Architecture**: Bluetooth mesh for offline + Nostr protocol for internet-based messaging
+- **Location-Based Channels**: Geographic chat rooms using geohash coordinates over global Nostr relays
+- **Intelligent Message Routing**: Automatically chooses best transport (Bluetooth → Nostr fallback)
 - **Decentralized Mesh Network**: Automatic peer discovery and multi-hop message relay over Bluetooth LE
 - **Privacy First**: No accounts, no phone numbers, no persistent identifiers
-- **Private Message End-to-End Encryption**: [Noise Protocol](http://noiseprotocol.org)
+- **Private Message End-to-End Encryption**: [Noise Protocol](http://noiseprotocol.org) for mesh, NIP-17 for Nostr
 - **IRC-Style Commands**: Familiar `/slap`, `/msg`, `/who` style interface
 - **Universal App**: Native support for iOS and macOS
 - **Emergency Wipe**: Triple-tap to instantly clear all data
 - **Performance Optimizations**: LZ4 message compression, adaptive battery modes, and optimized networking
 
-
 ## [Technical Architecture](https://deepwiki.com/permissionlesstech/bitchat)
 
-### Binary Protocol
+BitChat uses a **hybrid messaging architecture** with two complementary transport layers:
-bitchat uses an efficient binary protocol optimized for Bluetooth LE:
-- Compact packet format with 1-byte type field
-- TTL-based message routing (max 7 hops)
-- Automatic fragmentation for large messages
-- Message deduplication via unique IDs
 
-### Mesh Networking
+### Bluetooth Mesh Network (Offline)
-- Each device acts as both client and peripheral
+
-- Automatic peer discovery and connection management
+- **Local Communication**: Direct peer-to-peer within Bluetooth range
-- Adaptive duty cycling for battery optimization
+- **Multi-hop Relay**: Messages route through nearby devices (max 7 hops)
+- **No Internet Required**: Works completely offline in disaster scenarios
+- **Noise Protocol Encryption**: End-to-end encryption with forward secrecy
+- **Binary Protocol**: Compact packet format optimized for Bluetooth LE constraints
+- **Automatic Discovery**: Peer discovery and connection management
+- **Adaptive Power**: Battery-optimized duty cycling
+
+### Nostr Protocol (Internet)
+
+- **Global Reach**: Connect with users worldwide via internet relays
+- **Location Channels**: Geographic chat rooms using geohash coordinates
+- **290+ Relay Network**: Distributed across the globe for reliability
+- **NIP-17 Encryption**: Gift-wrapped private messages for internet privacy
+- **Ephemeral Keys**: Fresh cryptographic identity per geohash area
+
+### Channel Types
+
+#### `mesh #bluetooth`
+
+- **Transport**: Bluetooth Low Energy mesh network
+- **Scope**: Local devices within multi-hop range
+- **Internet**: Not required
+- **Use Case**: Offline communication, protests, disasters, remote areas
+
+#### Location Channels (`block #dr5rsj7`, `neighborhood #dr5rs`, `country #dr`)
+
+- **Transport**: Nostr protocol over internet
+- **Scope**: Geographic areas defined by geohash precision
+  - `block` (7 chars): City block level
+  - `neighborhood` (6 chars): District/neighborhood
+  - `city` (5 chars): City level
+  - `province` (4 chars): State/province
+  - `region` (2 chars): Country/large region
+- **Internet**: Required (connects to Nostr relays)
+- **Use Case**: Location-based community chat, local events, regional discussions
+
+### Direct Message Routing
+
+Private messages use **intelligent transport selection**:
+
+1. **Bluetooth First** (preferred when available)
+
+   - Direct connection with established Noise session
+   - Fastest and most private option
+
+2. **Nostr Fallback** (when Bluetooth unavailable)
+
+   - Uses recipient's Nostr public key
+   - NIP-17 gift-wrapping for privacy
+   - Routes through global relay network
+
+3. **Smart Queuing** (when neither available)
+   - Messages queued until transport becomes available
+   - Automatic delivery when connection established
 
 For detailed protocol documentation, see the [Technical Whitepaper](WHITEPAPER.md).
 
-
 ## Setup
 
 ### Option 1: Using XcodeGen (Recommended)
 
 1. Install XcodeGen if you haven't already:
+
    ```bash
    brew install xcodegen
    ```
 
 2. Generate the Xcode project:
+
    ```bash
    cd bitchat
    xcodegen generate
@@ -68,6 +117,7 @@ For detailed protocol documentation, see the [Technical Whitepaper](WHITEPAPER.m
 ### Option 2: Using Swift Package Manager
 
 1. Open the project in Xcode:
+
    ```bash
    cd bitchat
    open Package.swift

bitchat.xcodeproj/project.pbxproj

@@ -29,6 +29,13 @@
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@@ -195,6 +208,9 @@
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@@ -468,6 +489,7 @@
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+				048A4C292E5FCD6600162C4A /* GeohashBookmarksStore.swift in Sources */,
 				049BD3AB2E51E38E001A566B /* PeerIDResolver.swift in Sources */,
 				9CCF09F7527EC681A13FC246 /* NoiseSecurityConsiderations.swift in Sources */,
 				92D1CF17DF88EA298F6E5E8E /* NoiseSession.swift in Sources */,
@@ -840,6 +876,7 @@
 				047502B12E55E8450083520F /* InputValidatorTests.swift in Sources */,
 				D727EA273CB214FC32612469 /* MockBluetoothMeshService.swift in Sources */,
 				047502932E547ACC0083520F /* LocationChannelsTests.swift in Sources */,
+				048A4C2B2E5FCE0300162C4A /* GeohashBookmarksStoreTests.swift in Sources */,
 				6C803BF930E7E19BE6E99EAA /* MockBLEService.swift in Sources */,
 				765254F56997F01054699AC0 /* NoiseProtocolTests.swift in Sources */,
 				968181D255CA7A804340B4DA /* NostrProtocolTests.swift in Sources */,
@@ -862,6 +899,7 @@
 				047502B02E55E8450083520F /* InputValidatorTests.swift in Sources */,
 				8851F08D88C5B1DE7B9F55C6 /* MockBluetoothMeshService.swift in Sources */,
 				047502922E547ACC0083520F /* LocationChannelsTests.swift in Sources */,
+				048A4C2C2E5FCE0300162C4A /* GeohashBookmarksStoreTests.swift in Sources */,
 				3849CA6D99B2D536636DF4A6 /* MockBLEService.swift in Sources */,
 				BC4DC75F4FB823FF40569676 /* NoiseProtocolTests.swift in Sources */,
 				EE8C3ECADAB3083A2687D50B /* NostrProtocolTests.swift in Sources */,
@@ -978,7 +1016,7 @@
 					"@executable_path/Frameworks",
 					"@executable_path/../../Frameworks",
 				);
-				MARKETING_VERSION = 1.3.2;
+				MARKETING_VERSION = 1.3.3;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat.ShareExtension;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
@@ -1009,7 +1047,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.3.2;
+				MARKETING_VERSION = 1.3.3;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat;
 				PRODUCT_NAME = bitchat;
 				SDKROOT = iphoneos;
@@ -1064,7 +1102,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.3.2;
+				MARKETING_VERSION = 1.3.3;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat;
 				PRODUCT_NAME = bitchat;
 				SDKROOT = iphoneos;
@@ -1096,7 +1134,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 1.3.1;
+				MARKETING_VERSION = 1.3.3;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat;
 				PRODUCT_NAME = bitchat;
 				REGISTER_APP_GROUPS = YES;
@@ -1185,7 +1223,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 1.3.1;
+				MARKETING_VERSION = 1.3.3;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat;
 				PRODUCT_NAME = bitchat;
 				REGISTER_APP_GROUPS = YES;
@@ -1278,7 +1316,7 @@
 					"@executable_path/Frameworks",
 					"@executable_path/../../Frameworks",
 				);
-				MARKETING_VERSION = 1.3.2;
+				MARKETING_VERSION = 1.3.3;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.bitchat.ShareExtension;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";

bitchat/BitchatApp.swift

@@ -31,6 +31,13 @@ struct BitchatApp: App {
                 .environmentObject(chatViewModel)
                 .onAppear {
                     NotificationDelegate.shared.chatViewModel = chatViewModel
+                    // Inject live Noise service into VerificationService to avoid creating new BLE instances
+                    VerificationService.shared.configure(with: chatViewModel.meshService.getNoiseService())
+                    // Prewarm Nostr identity and QR to make first VERIFY sheet fast
+                    DispatchQueue.global(qos: .utility).async {
+                        let npub = try? NostrIdentityBridge.getCurrentNostrIdentity()?.npub
+                        _ = VerificationService.shared.buildMyQRString(nickname: chatViewModel.nickname, npub: npub)
+                    }
                     #if os(iOS)
                     appDelegate.chatViewModel = chatViewModel
                     #elseif os(macOS)
@@ -92,30 +99,18 @@ struct BitchatApp: App {
             return
         }
         
-        // Only process if shared within last 30 seconds
+        // Only process if shared within configured window
-        if Date().timeIntervalSince(sharedDate) < 30 {
+        if Date().timeIntervalSince(sharedDate) < TransportConfig.uiShareAcceptWindowSeconds {
             let contentType = userDefaults.string(forKey: "sharedContentType") ?? "text"
             
             // Clear the shared content
             userDefaults.removeObject(forKey: "sharedContent")
             userDefaults.removeObject(forKey: "sharedContentType")
             userDefaults.removeObject(forKey: "sharedContentDate")
-            userDefaults.synchronize()
+            // No need to force synchronize here
             
-            // Show notification about shared content
+            // Send the shared content immediately on the main queue
             DispatchQueue.main.async {
-                // Add system message about sharing
-                let systemMessage = BitchatMessage(
-                    sender: "system",
-                    content: "preparing to share \(contentType)...",
-                    timestamp: Date(),
-                    isRelay: false
-                )
-                self.chatViewModel.messages.append(systemMessage)
-            }
-            
-            // Send the shared content after a short delay
-            DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
                 if contentType == "url" {
                     // Try to parse as JSON first
                     if let data = sharedContent.data(using: .utf8),
@@ -178,6 +173,14 @@ class NotificationDelegate: NSObject, UNUserNotificationCenterDelegate {
                 }
             }
         }
+        // Handle deeplink (e.g., geohash activity)
+        if let deep = userInfo["deeplink"] as? String, let url = URL(string: deep) {
+            #if os(iOS)
+            DispatchQueue.main.async { UIApplication.shared.open(url) }
+            #else
+            DispatchQueue.main.async { NSWorkspace.shared.open(url) }
+            #endif
+        }
         
         completionHandler()
     }
@@ -197,6 +200,15 @@ class NotificationDelegate: NSObject, UNUserNotificationCenterDelegate {
                 }
             }
         }
+        // Suppress geohash activity notification if we're already in that geohash channel
+        if identifier.hasPrefix("geo-activity-"),
+           let deep = userInfo["deeplink"] as? String,
+           let gh = deep.components(separatedBy: "/").last {
+            if case .location(let ch) = LocationChannelManager.shared.selectedChannel, ch.geohash == gh {
+                completionHandler([])
+                return
+            }
+        }
         
         // Show notification in all other cases
         completionHandler([.banner, .sound])

bitchat/Identity/IdentityModels.swift

@@ -106,6 +106,8 @@ enum HandshakeState {
 struct CryptographicIdentity: Codable {
     let fingerprint: String     // SHA256 of public key
     let publicKey: Data         // Noise static public key
+    // Optional Ed25519 signing public key (used to authenticate public messages)
+    var signingPublicKey: Data? = nil
     let firstSeen: Date
     let lastHandshake: Date?
 }
@@ -173,56 +175,7 @@ struct PendingActions {
     var setPetname: String?
 }
 
-// MARK: - Privacy Settings
+//
-
-struct PrivacySettings: Codable {
-    // Level 1: Maximum privacy (default)
-    var persistIdentityCache = false
-    var showLastSeen = false
-    
-    // Level 2: Convenience
-    var autoAcceptKnownFingerprints = false
-    var rememberNicknameHistory = false
-    
-    // Level 3: Social
-    var shareTrustNetworkHints = false  // "3 mutual contacts trust this person"
-}
-
-// MARK: - Conflict Resolution
-
-/// Strategies for resolving identity conflicts in the decentralized network.
-/// Handles cases where multiple peers claim the same nickname or when
-/// identity mappings become ambiguous due to network partitions.
-enum ConflictResolution {
-    case acceptNew(petname: String)      // "John (2)"
-    case rejectNew
-    case blockFingerprint(String)
-    case alertUser(message: String)
-}
-
-// MARK: - UI State
-
-struct PeerUIState {
-    let peerID: String
-    let nickname: String
-    var identityState: IdentityState
-    var connectionQuality: ConnectionQuality
-    
-    enum IdentityState {
-        case unknown                    // Gray - No identity info
-        case unverifiedKnown(String)   // Blue - Handshake done, matches cache
-        case verified(String)          // Green - Cryptographically verified
-        case conflict(String, String)  // Red - Nickname doesn't match fingerprint
-        case pending                   // Yellow - Handshake in progress
-    }
-}
-
-enum ConnectionQuality {
-    case excellent
-    case good
-    case poor
-    case disconnected
-}
 
 // MARK: - Migration Support
-// Removed LegacyFavorite - no longer needed
+//

bitchat/Identity/SecureIdentityStateManager.swift

@@ -230,6 +230,91 @@ class SecureIdentityStateManager {
         }
     }
 
+    // MARK: - Cryptographic Identities
+
+    /// Insert or update a cryptographic identity and optionally persist its signing key and claimed nickname.
+    /// - Parameters:
+    ///   - fingerprint: SHA-256 hex of the Noise static public key
+    ///   - noisePublicKey: Noise static public key data
+    ///   - signingPublicKey: Optional Ed25519 signing public key for authenticating public messages
+    ///   - claimedNickname: Optional latest claimed nickname to persist into social identity
+    func upsertCryptographicIdentity(fingerprint: String, noisePublicKey: Data, signingPublicKey: Data?, claimedNickname: String? = nil) {
+        queue.async(flags: .barrier) {
+            let now = Date()
+            if var existing = self.cryptographicIdentities[fingerprint] {
+                // Update keys if changed
+                if existing.publicKey != noisePublicKey {
+                    existing = CryptographicIdentity(
+                        fingerprint: fingerprint,
+                        publicKey: noisePublicKey,
+                        signingPublicKey: signingPublicKey ?? existing.signingPublicKey,
+                        firstSeen: existing.firstSeen,
+                        lastHandshake: now
+                    )
+                    self.cryptographicIdentities[fingerprint] = existing
+                } else {
+                    // Update signing key and lastHandshake
+                    existing.signingPublicKey = signingPublicKey ?? existing.signingPublicKey
+                    let updated = CryptographicIdentity(
+                        fingerprint: existing.fingerprint,
+                        publicKey: existing.publicKey,
+                        signingPublicKey: existing.signingPublicKey,
+                        firstSeen: existing.firstSeen,
+                        lastHandshake: now
+                    )
+                    self.cryptographicIdentities[fingerprint] = updated
+                }
+                // Persist updated state (already assigned in branches above)
+            } else {
+                // New entry
+                let entry = CryptographicIdentity(
+                    fingerprint: fingerprint,
+                    publicKey: noisePublicKey,
+                    signingPublicKey: signingPublicKey,
+                    firstSeen: now,
+                    lastHandshake: now
+                )
+                self.cryptographicIdentities[fingerprint] = entry
+            }
+
+            // Optionally persist claimed nickname into social identity
+            if let claimed = claimedNickname {
+                var identity = self.cache.socialIdentities[fingerprint] ?? SocialIdentity(
+                    fingerprint: fingerprint,
+                    localPetname: nil,
+                    claimedNickname: claimed,
+                    trustLevel: .unknown,
+                    isFavorite: false,
+                    isBlocked: false,
+                    notes: nil
+                )
+                // Update claimed nickname if changed
+                if identity.claimedNickname != claimed {
+                    identity.claimedNickname = claimed
+                    self.cache.socialIdentities[fingerprint] = identity
+                } else if self.cache.socialIdentities[fingerprint] == nil {
+                    self.cache.socialIdentities[fingerprint] = identity
+                }
+            }
+
+            self.saveIdentityCache()
+        }
+    }
+
+    /// Retrieve cryptographic identity by fingerprint
+    func getCryptographicIdentity(for fingerprint: String) -> CryptographicIdentity? {
+        queue.sync { cryptographicIdentities[fingerprint] }
+    }
+
+    /// Find cryptographic identities whose fingerprint prefix matches a peerID (16-hex) short ID
+    func getCryptoIdentitiesByPeerIDPrefix(_ peerID: String) -> [CryptographicIdentity] {
+        queue.sync {
+            // Defensive: ensure hex and correct length
+            guard peerID.count == 16, peerID.allSatisfy({ $0.isHexDigit }) else { return [] }
+            return cryptographicIdentities.values.filter { $0.fingerprint.hasPrefix(peerID) }
+        }
+    }
+    
     func getAllSocialIdentities() -> [SocialIdentity] {
         queue.sync {
             return Array(cache.socialIdentities.values)

bitchat/Info.plist

@@ -37,6 +37,8 @@
 	<string>bitchat uses Bluetooth to discover and connect with other bitchat users nearby.</string>
 	<key>NSLocationWhenInUseUsageDescription</key>
 	<string>bitchat uses your approximate location to compute local geohash channels for optional public chats. Exact GPS is never shared.</string>
+	<key>NSCameraUsageDescription</key>
+	<string>bitchat uses the camera to scan QR codes to verify peers.</string>
 	<key>UIBackgroundModes</key>
 	<array>
 		<string>bluetooth-central</string>

bitchat/Models/BitchatPeer.swift

@@ -8,6 +8,7 @@ struct BitchatPeer: Identifiable, Equatable {
     let nickname: String
     let lastSeen: Date
     let isConnected: Bool
+    let isReachable: Bool
     
     // Favorite-related properties
     var favoriteStatus: FavoritesPersistenceService.FavoriteRelationship?
@@ -18,6 +19,7 @@ struct BitchatPeer: Identifiable, Equatable {
     // Connection state
     enum ConnectionState {
         case bluetoothConnected
+        case meshReachable      // Seen via mesh recently, not directly connected
         case nostrAvailable     // Mutual favorite, reachable via Nostr
         case offline            // Not connected via any transport
     }
@@ -25,6 +27,8 @@ struct BitchatPeer: Identifiable, Equatable {
     var connectionState: ConnectionState {
         if isConnected {
             return .bluetoothConnected
+        } else if isReachable {
+            return .meshReachable
         } else if favoriteStatus?.isMutual == true {
             // Mutual favorites can communicate via Nostr when offline
             return .nostrAvailable
@@ -54,6 +58,8 @@ struct BitchatPeer: Identifiable, Equatable {
         switch connectionState {
         case .bluetoothConnected:
             return "📻" // Radio icon for mesh connection
+        case .meshReachable:
+            return "📡" // Antenna for mesh reachable
         case .nostrAvailable:
             return "🌐" // Purple globe for Nostr
         case .offline:
@@ -71,13 +77,15 @@ struct BitchatPeer: Identifiable, Equatable {
         noisePublicKey: Data,
         nickname: String,
         lastSeen: Date = Date(),
-        isConnected: Bool = false
+        isConnected: Bool = false,
+        isReachable: Bool = false
     ) {
         self.id = id
         self.noisePublicKey = noisePublicKey
         self.nickname = nickname
         self.lastSeen = lastSeen
         self.isConnected = isConnected
+        self.isReachable = isReachable
         
         // Load favorite status - will be set later by the manager
         self.favoriteStatus = nil
@@ -89,219 +97,4 @@ struct BitchatPeer: Identifiable, Equatable {
     }
 }
 
-// MARK: - Peer Manager
+//
-
-/// Manages the collection of peers and their states
-@MainActor
-class PeerManager: ObservableObject {
-    @Published var peers: [BitchatPeer] = []
-    @Published var favorites: [BitchatPeer] = []
-    @Published var mutualFavorites: [BitchatPeer] = []
-    
-    private let meshService: Transport
-    private let favoritesService = FavoritesPersistenceService.shared
-    
-    init(meshService: Transport) {
-        self.meshService = meshService
-        updatePeers()
-        
-        // Listen for updates
-        NotificationCenter.default.addObserver(
-            self,
-            selector: #selector(handleFavoriteChanged),
-            name: .favoriteStatusChanged,
-            object: nil
-        )
-    }
-    
-    @objc private func handleFavoriteChanged() {
-        SecureLogger.log("⭐ Favorite status changed notification received, updating peers", 
-                        category: SecureLogger.session, level: .debug)
-        updatePeers()
-    }
-    
-    deinit {
-        NotificationCenter.default.removeObserver(self)
-    }
-    
-    func updatePeers() {
-        // Reduce log verbosity - only log when count changes
-        let previousCount = peers.count
-        
-        // Get current mesh peers
-        let meshPeers = meshService.getPeerNicknames()
-        
-        // Build peer list
-        var allPeers: [BitchatPeer] = []
-        var connectedNicknames: Set<String> = []
-        var addedPeerIDs: Set<String> = []
-        
-        // Add connected mesh peers (only if actually connected or relay connected)
-        for (peerID, nickname) in meshPeers {
-            guard let noiseKey = Data(hexString: peerID) else { continue }
-            
-            // Safety check: Never add our own peer ID
-            if peerID == meshService.myPeerID {
-                continue
-            }
-            
-            // Check if this peer is actually connected
-            let isConnected = meshService.isPeerConnected(peerID)
-            
-            // Skip disconnected peers unless they're favorites (handled later)
-            if !isConnected {
-                continue
-            }
-            
-            if isConnected {
-                connectedNicknames.insert(nickname)
-            }
-            
-            // Track that we've added this peer ID
-            addedPeerIDs.insert(peerID)
-            
-            var peer = BitchatPeer(
-                id: peerID,
-                noisePublicKey: noiseKey,
-                nickname: nickname,
-                isConnected: isConnected
-            )
-            // Set favorite status - check both by current noise key and by nickname
-            if let favoriteStatus = favoritesService.getFavoriteStatus(for: noiseKey) {
-                peer.favoriteStatus = favoriteStatus
-                peer.nostrPublicKey = favoriteStatus.peerNostrPublicKey
-            } else {
-                // Check if we have a favorite for this nickname (peer may have reconnected with new ID)
-                let favoriteByNickname = favoritesService.favorites.values.first { $0.peerNickname == nickname }
-                if let favorite = favoriteByNickname {
-                    SecureLogger.log("🔄 Found favorite for '\(nickname)' by nickname, updating noise key", 
-                                    category: SecureLogger.session, level: .info)
-                    // Update the favorite's noise key to match the current connection
-                    favoritesService.updateNoisePublicKey(from: favorite.peerNoisePublicKey, to: noiseKey, peerNickname: nickname)
-                    // Get the updated favorite with the new key
-                    peer.favoriteStatus = favoritesService.getFavoriteStatus(for: noiseKey)
-                    peer.nostrPublicKey = peer.favoriteStatus?.peerNostrPublicKey ?? favorite.peerNostrPublicKey
-                }
-            }
-            allPeers.append(peer)
-        }
-        
-        // Add offline favorites (only those not currently connected AND that we actively favorite)
-        
-        for (favoriteKey, favorite) in favoritesService.favorites {
-            let favoriteID = favorite.peerNoisePublicKey.hexEncodedString()
-            
-            // Skip if this peer is already connected (by nickname)
-            if connectedNicknames.contains(favorite.peerNickname) {
-                // Skipping favorite - already connected
-                continue
-            }
-            
-            // Skip if we already added a peer with this ID (prevents duplicates)
-            if addedPeerIDs.contains(favoriteID) {
-                // Skipping favorite - peer ID already added
-                continue
-            }
-            
-            // Only add peers that WE favorite (not just ones who favorite us)
-            if !favorite.isFavorite {
-                // Skipping - we don't favorite them
-                continue
-            }
-            
-            // Add this favorite as an offline peer
-            SecureLogger.log("  - Adding offline favorite '\(favorite.peerNickname)' (key: \(favoriteKey.hexEncodedString()), ID: \(favoriteID), mutual: \(favorite.isMutual))", 
-                            category: SecureLogger.session, level: .info)
-            
-            var peer = BitchatPeer(
-                id: favoriteID,
-                noisePublicKey: favorite.peerNoisePublicKey,
-                nickname: favorite.peerNickname,
-                isConnected: false
-            )
-            // Set favorite status
-            peer.favoriteStatus = favorite
-            peer.nostrPublicKey = favorite.peerNostrPublicKey
-            addedPeerIDs.insert(favoriteID)  // Track that we've added this ID
-            allPeers.append(peer)
-        }
-        
-        // Filter out "Unknown" peers unless they are favorites or have a favorite relationship
-        allPeers = allPeers.filter { peer in
-            !(peer.displayName == "Unknown" && peer.favoriteStatus == nil)
-        }
-        
-        // Sort: Connected first, then favorites, then alphabetical
-        allPeers.sort { lhs, rhs in
-            // Direct connections first
-            if lhs.isConnected != rhs.isConnected {
-                return lhs.isConnected
-            }
-            // Then favorites
-            if lhs.isFavorite != rhs.isFavorite {
-                return lhs.isFavorite
-            }
-            // Finally alphabetical
-            return lhs.displayName < rhs.displayName
-        }
-        
-        // Single pass to compute all subsets and counts
-        var favorites: [BitchatPeer] = []
-        var mutualFavorites: [BitchatPeer] = []
-        var connectedCount = 0
-        var offlineCount = 0
-        
-        for peer in allPeers {
-            if peer.isFavorite {
-                favorites.append(peer)
-            }
-            if peer.isMutualFavorite {
-                mutualFavorites.append(peer)
-            }
-            if peer.isConnected {
-                connectedCount += 1
-            } else {
-                offlineCount += 1
-            }
-        }
-        
-        // Final safety check: ensure no duplicate IDs
-        var finalPeers: [BitchatPeer] = []
-        var seenIDs: Set<String> = []
-        for peer in allPeers {
-            if !seenIDs.contains(peer.id) {
-                seenIDs.insert(peer.id)
-                finalPeers.append(peer)
-            } else {
-                SecureLogger.log("⚠️ Removing duplicate peer ID in final check: \(peer.id) (\(peer.displayName))", 
-                               category: SecureLogger.session, level: .warning)
-            }
-        }
-        
-        self.peers = finalPeers
-        self.favorites = favorites
-        self.mutualFavorites = mutualFavorites
-        
-        // Log peer list summary sparingly at debug level
-        if favoritesService.favorites.count > 0 {
-            SecureLogger.log("📊 Peer list update: \(allPeers.count) total (\(connectedCount) connected, \(offlineCount) offline), \(favorites.count) favorites, \(mutualFavorites.count) mutual", 
-                            category: SecureLogger.session, level: .debug)
-        } else if previousCount != allPeers.count {
-            SecureLogger.log("✅ Updated peer list: \(allPeers.count) total peers", 
-                            category: SecureLogger.session, level: .debug)
-        }
-    }
-    
-    func toggleFavorite(_ peer: BitchatPeer) {
-        if peer.isFavorite {
-            favoritesService.removeFavorite(peerNoisePublicKey: peer.noisePublicKey)
-        } else {
-            favoritesService.addFavorite(
-                peerNoisePublicKey: peer.noisePublicKey,
-                peerNostrPublicKey: peer.nostrPublicKey,
-                peerNickname: peer.nickname
-            )
-        }
-        updatePeers()
-    }
-}

bitchat/Nostr/GeoRelayDirectory.swift

@@ -14,7 +14,7 @@ final class GeoRelayDirectory {
     private let cacheFileName = "georelays_cache.csv"
     private let lastFetchKey = "georelay.lastFetchAt"
     private let remoteURL = URL(string: "https://raw.githubusercontent.com/permissionlesstech/georelays/refs/heads/main/nostr_relays.csv")!
-    private let fetchInterval: TimeInterval = 60 * 60 * 24 // 24h
+    private let fetchInterval: TimeInterval = TransportConfig.geoRelayFetchIntervalSeconds // 24h
 
     private init() {
         // Load cached or bundled data synchronously

bitchat/Nostr/NostrProtocol.swift

@@ -122,8 +122,8 @@ struct NostrProtocol {
             tags: tags,
             content: content
         )
-        let signingKey = try senderIdentity.signingKey()
+        let schnorrKey = try senderIdentity.schnorrSigningKey()
-        return try event.sign(with: signingKey)
+        return try event.sign(with: schnorrKey)
     }
     
     // MARK: - Private Methods
@@ -149,9 +149,8 @@ struct NostrProtocol {
             content: encrypted
         )
         
-        // Convert to P256K.Signing.PrivateKey for signing (temporary until we update sign method)
+        // Sign the seal with the sender's Schnorr private key
-        let signingKey = try P256K.Signing.PrivateKey(dataRepresentation: senderKey.dataRepresentation)
+        return try seal.sign(with: senderKey)
-        return try seal.sign(with: signingKey)
     }
     
     private static func createGiftWrap(
@@ -181,9 +180,8 @@ struct NostrProtocol {
             content: encrypted
         )
         
-        // Convert to P256K.Signing.PrivateKey for signing (temporary until we update sign method)
+        // Sign the gift wrap with the wrap Schnorr private key
-        let signingKey = try P256K.Signing.PrivateKey(dataRepresentation: wrapKey.dataRepresentation)
+        return try giftWrap.sign(with: wrapKey)
-        return try giftWrap.sign(with: signingKey)
     }
     
     private static func unwrapGiftWrap(
@@ -416,7 +414,7 @@ struct NostrProtocol {
         
         // Log with explicit UTC and local time for debugging
         let formatter = DateFormatter()
-        // Removed unnecessary date formatting operations
+        //
         formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
         formatter.timeZone = TimeZone(abbreviation: "UTC")
         
@@ -472,19 +470,16 @@ struct NostrEvent: Codable {
         self.sig = dict["sig"] as? String
     }
     
-    func sign(with key: P256K.Signing.PrivateKey) throws -> NostrEvent {
+    func sign(with key: P256K.Schnorr.PrivateKey) throws -> NostrEvent {
         let (eventId, eventIdHash) = try calculateEventId()
         
-        // Convert to Schnorr key for Nostr signing
+        // Sign with Schnorr (BIP-340)
-        let schnorrKey = try P256K.Schnorr.PrivateKey(dataRepresentation: key.dataRepresentation)
-        
-        // Sign with Schnorr
         var messageBytes = [UInt8](eventIdHash)
         var auxRand = [UInt8](repeating: 0, count: 32)
         _ = auxRand.withUnsafeMutableBytes { ptr in
             SecRandomCopyBytes(kSecRandomDefault, 32, ptr.baseAddress!)
         }
-        let schnorrSignature = try schnorrKey.signature(message: &messageBytes, auxiliaryRand: &auxRand)
+        let schnorrSignature = try key.signature(message: &messageBytes, auxiliaryRand: &auxRand)
         
         let signatureHex = schnorrSignature.dataRepresentation.hexEncodedString()
         

bitchat/Nostr/NostrRelayManager.swift

@@ -48,10 +48,10 @@ class NostrRelayManager: ObservableObject {
     private let messageQueueLock = NSLock()
     
     // Exponential backoff configuration
-    private let initialBackoffInterval: TimeInterval = 1.0  // Start with 1 second
+    private let initialBackoffInterval: TimeInterval = TransportConfig.nostrRelayInitialBackoffSeconds
-    private let maxBackoffInterval: TimeInterval = 300.0    // Max 5 minutes
+    private let maxBackoffInterval: TimeInterval = TransportConfig.nostrRelayMaxBackoffSeconds
-    private let backoffMultiplier: Double = 2.0            // Double each time
+    private let backoffMultiplier: Double = TransportConfig.nostrRelayBackoffMultiplier
-    private let maxReconnectAttempts = 10                  // Stop after 10 attempts
+    private let maxReconnectAttempts = TransportConfig.nostrRelayMaxReconnectAttempts
     
     // Reconnection timer
     private var reconnectionTimer: Timer?
@@ -289,7 +289,7 @@ class NostrRelayManager: ObservableObject {
                         
                         // Only log non-gift-wrap events to reduce noise
                         if event.kind != 1059 {
-                            SecureLogger.log("📥 Received Nostr event (kind: \(event.kind)) from relay: \(relayUrl)", 
+                            SecureLogger.log("📥 Event kind=\(event.kind) id=\(event.id.prefix(16))… relay=\(relayUrl)",
                                             category: SecureLogger.session, level: .debug)
                         }
                         
@@ -321,11 +321,11 @@ class NostrRelayManager: ObservableObject {
                         let reason = array.count >= 4 ? (array[3] as? String ?? "no reason given") : "no reason given"
                         if success {
                             _ = Self.pendingGiftWrapIDs.remove(eventId)
-                            SecureLogger.log("✅ Event accepted id=\(eventId.prefix(16))... by relay: \(relayUrl)",
+                            SecureLogger.log("✅ Accepted id=\(eventId.prefix(16))… relay=\(relayUrl)",
                                             category: SecureLogger.session, level: .debug)
                         } else {
                             let isGiftWrap = Self.pendingGiftWrapIDs.remove(eventId) != nil
-                            SecureLogger.log("📮 Event \(eventId.prefix(16))... rejected by relay: \(reason)", 
+                            SecureLogger.log("📮 Rejected id=\(eventId.prefix(16))… reason=\(reason)", 
                                             category: SecureLogger.session, level: isGiftWrap ? .warning : .error)
                         }
                     }
@@ -353,7 +353,7 @@ class NostrRelayManager: ObservableObject {
             let data = try encoder.encode(req)
             let message = String(data: data, encoding: .utf8) ?? ""
             
-            SecureLogger.log("📤 Sending Nostr event (kind: \(event.kind)) to relay: \(relayUrl)", 
+            SecureLogger.log("📤 Send kind=\(event.kind) id=\(event.id.prefix(16))… relay=\(relayUrl)", 
                             category: SecureLogger.session, level: .debug)
             
             connection.send(.string(message)) { [weak self] error in
@@ -568,7 +568,7 @@ struct NostrFilter: Encodable {
         filter.kinds = [1059] // Gift wrap kind
         filter.since = since?.timeIntervalSince1970.toInt()
         filter.tagFilters = ["p": [pubkey]]
-        filter.limit = 100 // Add a reasonable limit
+        filter.limit = TransportConfig.nostrRelayDefaultFetchLimit // reasonable limit
         return filter
     }
 

bitchat/Protocols/BitchatProtocol.swift

@@ -155,12 +155,17 @@ enum NoisePayloadType: UInt8 {
     case privateMessage = 0x01      // Private chat message
     case readReceipt = 0x02         // Message was read
     case delivered = 0x03           // Message was delivered
+    // Verification (QR-based OOB binding)
+    case verifyChallenge = 0x10     // Verification challenge
+    case verifyResponse  = 0x11     // Verification response
     
     var description: String {
         switch self {
         case .privateMessage: return "privateMessage"
         case .readReceipt: return "readReceipt"
         case .delivered: return "delivered"
+        case .verifyChallenge: return "verifyChallenge"
+        case .verifyResponse: return "verifyResponse"
         }
     }
 }
@@ -176,8 +181,7 @@ enum LazyHandshakeState {
     case failed(Error)         // Handshake failed
 }
 
-// MARK: - Special Recipients (removed)
+//
-// Previously defined broadcast identifiers were unused; removed for simplicity.
 
 // MARK: - Core Protocol Structures
 
@@ -263,8 +267,7 @@ struct BitchatPacket: Codable {
     }
 }
 
-// MARK: - Delivery Acknowledgments (removed)
+//
-// Legacy DeliveryAck structures are no longer used; delivery status flows via Noise payloads.
 
 // MARK: - Read Receipts
 
@@ -356,7 +359,7 @@ struct ReadReceipt: Codable {
 }
 
 
-// PeerIdentityBinding removed (unused).
+//
 
 
 // MARK: - Delivery Status

bitchat/Protocols/Geohash.swift

@@ -87,4 +87,28 @@ enum Geohash {
         let lon = (lonInterval.0 + lonInterval.1) / 2
         return (lat, lon)
     }
+
+    /// Decodes a geohash into its latitude and longitude bounds.
+    /// - Parameter geohash: Base32 geohash string.
+    /// - Returns: (latMin, latMax, lonMin, lonMax)
+    static func decodeBounds(_ geohash: String) -> (latMin: Double, latMax: Double, lonMin: Double, lonMax: Double) {
+        var latInterval: (Double, Double) = (-90.0, 90.0)
+        var lonInterval: (Double, Double) = (-180.0, 180.0)
+
+        var isEven = true
+        for ch in geohash.lowercased() {
+            guard let cd = base32Map[ch] else { continue }
+            for mask in [16, 8, 4, 2, 1] {
+                if isEven {
+                    let mid = (lonInterval.0 + lonInterval.1) / 2
+                    if (cd & mask) != 0 { lonInterval.0 = mid } else { lonInterval.1 = mid }
+                } else {
+                    let mid = (latInterval.0 + latInterval.1) / 2
+                    if (cd & mask) != 0 { latInterval.0 = mid } else { latInterval.1 = mid }
+                }
+                isEven.toggle()
+            }
+        }
+        return (latInterval.0, latInterval.1, lonInterval.0, lonInterval.1)
+    }
 }

bitchat/Services/AutocompleteService.swift

@@ -14,7 +14,7 @@ class AutocompleteService {
     private let commandRegex = try? NSRegularExpression(pattern: "^/([a-z]*)$", options: [])
     
     private let commands = [
-        "/msg", "/who", "/clear", "/help",
+        "/msg", "/who", "/clear",
         "/hug", "/slap", "/fav", "/unfav",
         "/block", "/unblock"
     ]
@@ -95,7 +95,7 @@ class AutocompleteService {
     
     private func needsArgument(command: String) -> Bool {
         switch command {
-        case "/who", "/clear", "/help":
+        case "/who", "/clear":
             return false
         default:
             return true

bitchat/Services/CommandProcessor.swift

@@ -33,6 +33,15 @@ class CommandProcessor {
         guard let cmd = parts.first else { return .error(message: "Invalid command") }
         let args = parts.count > 1 ? String(parts[1]) : ""
         
+        // Geohash context: disable favoriting in public geohash or GeoDM
+        let inGeoPublic: Bool = {
+            switch LocationChannelManager.shared.selectedChannel {
+            case .mesh: return false
+            case .location: return true
+            }
+        }()
+        let inGeoDM = (chatViewModel?.selectedPrivateChatPeer?.hasPrefix("nostr_") == true)
+
         switch cmd {
         case "/m", "/msg":
             return handleMessage(args)
@@ -49,11 +58,14 @@ class CommandProcessor {
         case "/unblock":
             return handleUnblock(args)
         case "/fav":
+            if inGeoPublic || inGeoDM { return .error(message: "favorites are only for mesh peers in #mesh") }
             return handleFavorite(args, add: true)
         case "/unfav":
+            if inGeoPublic || inGeoDM { return .error(message: "favorites are only for mesh peers in #mesh") }
             return handleFavorite(args, add: false)
+        //
         case "/help", "/h":
-            return handleHelp()
+            return .error(message: "unknown command: \(cmd)")
         default:
             return .error(message: "unknown command: \(cmd)")
         }
@@ -85,19 +97,34 @@ class CommandProcessor {
     }
     
     private func handleWho() -> CommandResult {
-        guard let peers = meshService?.getPeerNicknames(), !peers.isEmpty else {
+        // Show geohash participants when in a geohash channel; otherwise mesh peers
-            return .success(message: "no one else is online right now")
+        switch LocationChannelManager.shared.selectedChannel {
+        case .location(let ch):
+            // Geohash context: show visible geohash participants (exclude self)
+            guard let vm = chatViewModel else { return .success(message: "nobody around") }
+            let myHex = (try? NostrIdentityBridge.deriveIdentity(forGeohash: ch.geohash))?.publicKeyHex.lowercased()
+            let people = vm.visibleGeohashPeople().filter { person in
+                if let me = myHex { return person.id.lowercased() != me }
+                return true
+            }
+            let names = people.map { $0.displayName }
+            if names.isEmpty { return .success(message: "no one else is online right now") }
+            return .success(message: "online: " + names.sorted().joined(separator: ", "))
+        case .mesh:
+            // Mesh context: show connected peer nicknames
+            guard let peers = meshService?.getPeerNicknames(), !peers.isEmpty else {
+                return .success(message: "no one else is online right now")
+            }
+            let onlineList = peers.values.sorted().joined(separator: ", ")
+            return .success(message: "online: \(onlineList)")
         }
-        
-        let onlineList = peers.values.sorted().joined(separator: ", ")
-        return .success(message: "online: \(onlineList)")
     }
     
     private func handleClear() -> CommandResult {
         if let peerID = chatViewModel?.selectedPrivateChatPeer {
             chatViewModel?.privateChats[peerID]?.removeAll()
         } else {
-            chatViewModel?.messages.removeAll()
+            chatViewModel?.clearCurrentPublicTimeline()
         }
         return .handled
     }

bitchat/Services/GeohashBookmarksStore.swift

@@ -0,0 +1,227 @@
+import Foundation
+import Combine
+#if os(iOS) || os(macOS)
+import CoreLocation
+#endif
+
+/// Stores a user-maintained list of bookmarked geohash channels.
+/// - Persistence: UserDefaults (JSON string array)
+/// - Semantics: geohashes are normalized to lowercase base32 and de-duplicated
+final class GeohashBookmarksStore: ObservableObject {
+    static let shared = GeohashBookmarksStore()
+
+    @Published private(set) var bookmarks: [String] = []
+    @Published private(set) var bookmarkNames: [String: String] = [:] // geohash -> friendly name
+
+    private let storeKey = "locationChannel.bookmarks"
+    private let namesStoreKey = "locationChannel.bookmarkNames"
+    private var membership: Set<String> = []
+    #if os(iOS) || os(macOS)
+    private let geocoder = CLGeocoder()
+    private var resolving: Set<String> = []
+    #endif
+
+    private init() {
+        load()
+    }
+
+    // MARK: - Public API
+    func isBookmarked(_ geohash: String) -> Bool {
+        return membership.contains(Self.normalize(geohash))
+    }
+
+    func toggle(_ geohash: String) {
+        let gh = Self.normalize(geohash)
+        if membership.contains(gh) {
+            remove(gh)
+        } else {
+            add(gh)
+        }
+    }
+
+    func add(_ geohash: String) {
+        let gh = Self.normalize(geohash)
+        guard !gh.isEmpty else { return }
+        guard !membership.contains(gh) else { return }
+        bookmarks.insert(gh, at: 0)
+        membership.insert(gh)
+        persist()
+        // Resolve and persist a friendly name once when added
+        resolveNameIfNeeded(for: gh)
+    }
+
+    func remove(_ geohash: String) {
+        let gh = Self.normalize(geohash)
+        guard membership.contains(gh) else { return }
+        if let idx = bookmarks.firstIndex(of: gh) { bookmarks.remove(at: idx) }
+        membership.remove(gh)
+        // Clean up stored name to avoid stale cache growth
+        if bookmarkNames.removeValue(forKey: gh) != nil {
+            persistNames()
+        }
+        persist()
+    }
+
+    // MARK: - Persistence
+    private func load() {
+        guard let data = UserDefaults.standard.data(forKey: storeKey) else { return }
+        if let arr = try? JSONDecoder().decode([String].self, from: data) {
+            // Sanitize, normalize, dedupe while preserving order (first occurrence wins)
+            var seen = Set<String>()
+            var list: [String] = []
+            for raw in arr {
+                let gh = Self.normalize(raw)
+                guard !gh.isEmpty else { continue }
+                if !seen.contains(gh) {
+                    seen.insert(gh)
+                    list.append(gh)
+                }
+            }
+            bookmarks = list
+            membership = seen
+        }
+        // Load any saved names
+        if let namesData = UserDefaults.standard.data(forKey: namesStoreKey),
+           let dict = try? JSONDecoder().decode([String: String].self, from: namesData) {
+            bookmarkNames = dict
+        }
+    }
+
+    private func persist() {
+        if let data = try? JSONEncoder().encode(bookmarks) {
+            UserDefaults.standard.set(data, forKey: storeKey)
+        }
+    }
+
+    private func persistNames() {
+        if let data = try? JSONEncoder().encode(bookmarkNames) {
+            UserDefaults.standard.set(data, forKey: namesStoreKey)
+        }
+    }
+
+    // MARK: - Helpers
+    private static func normalize(_ s: String) -> String {
+        let allowed = Set("0123456789bcdefghjkmnpqrstuvwxyz")
+        return s
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+            .lowercased()
+            .replacingOccurrences(of: "#", with: "")
+            .filter { allowed.contains($0) }
+    }
+
+    // MARK: - Name Resolution
+    /// Attempt to resolve and persist a friendly place name for a bookmarked geohash.
+    func resolveNameIfNeeded(for geohash: String) {
+        let gh = Self.normalize(geohash)
+        guard !gh.isEmpty else { return }
+        if bookmarkNames[gh] != nil { return }
+        #if os(iOS) || os(macOS)
+        if resolving.contains(gh) { return }
+        resolving.insert(gh)
+        // For very coarse geohashes, sample multiple points to capture multiple admin areas
+        if gh.count <= 2 {
+            let b = Geohash.decodeBounds(gh)
+            let pts: [CLLocation] = [
+                CLLocation(latitude: (b.latMin + b.latMax) / 2, longitude: (b.lonMin + b.lonMax) / 2), // center
+                CLLocation(latitude: b.latMin, longitude: b.lonMin),
+                CLLocation(latitude: b.latMin, longitude: b.lonMax),
+                CLLocation(latitude: b.latMax, longitude: b.lonMin),
+                CLLocation(latitude: b.latMax, longitude: b.lonMax)
+            ]
+            resolveCompositeAdminName(geohash: gh, points: pts)
+        } else {
+            let center = Geohash.decodeCenter(gh)
+            let loc = CLLocation(latitude: center.lat, longitude: center.lon)
+            geocoder.reverseGeocodeLocation(loc) { [weak self] placemarks, _ in
+                guard let self = self else { return }
+                defer { self.resolving.remove(gh) }
+                if let pm = placemarks?.first {
+                    let name = Self.nameForGeohashLength(gh.count, from: pm)
+                    if let name = name, !name.isEmpty {
+                        DispatchQueue.main.async {
+                            self.bookmarkNames[gh] = name
+                            self.persistNames()
+                        }
+                    }
+                }
+            }
+        }
+        #endif
+    }
+
+    #if os(iOS) || os(macOS)
+    private func resolveCompositeAdminName(geohash gh: String, points: [CLLocation]) {
+        var uniqueAdmins = OrderedSet<String>()
+        var idx = 0
+        func step() {
+            if idx >= points.count {
+                // Compose up to 2 names joined by ' and '
+                let finalName: String? = {
+                    let names = uniqueAdmins.array
+                    if names.count >= 2 { return names[0] + " and " + names[1] }
+                    return names.first
+                }()
+                if let finalName = finalName, !finalName.isEmpty {
+                    DispatchQueue.main.async {
+                        self.bookmarkNames[gh] = finalName
+                        self.persistNames()
+                    }
+                }
+                self.resolving.remove(gh)
+                return
+            }
+            let loc = points[idx]
+            idx += 1
+            geocoder.reverseGeocodeLocation(loc) { [weak self] placemarks, _ in
+                guard self != nil else { return }
+                if let pm = placemarks?.first {
+                    if let admin = pm.administrativeArea, !admin.isEmpty {
+                        uniqueAdmins.insert(admin)
+                    } else if let country = pm.country, !country.isEmpty {
+                        uniqueAdmins.insert(country)
+                    }
+                }
+                // Proceed to next point
+                step()
+            }
+        }
+        step()
+    }
+
+    // Minimal ordered-set for stable joining
+    private struct OrderedSet<Element: Hashable> {
+        private var set: Set<Element> = []
+        private(set) var array: [Element] = []
+        mutating func insert(_ element: Element) {
+            if set.insert(element).inserted { array.append(element) }
+        }
+    }
+
+    private static func nameForGeohashLength(_ len: Int, from pm: CLPlacemark) -> String? {
+        switch len {
+        case 0...2:
+            // Prefer administrative area if available at this coarse level
+            return pm.administrativeArea ?? pm.country
+        case 3...4:
+            return pm.administrativeArea ?? pm.subAdministrativeArea ?? pm.country
+        case 5:
+            return pm.locality ?? pm.subAdministrativeArea ?? pm.administrativeArea
+        case 6...7:
+            return pm.subLocality ?? pm.locality ?? pm.administrativeArea
+        default:
+            return pm.subLocality ?? pm.locality ?? pm.administrativeArea ?? pm.country
+        }
+    }
+    #endif
+
+    #if DEBUG
+    /// Testing-only reset helper
+    func _resetForTesting() {
+        bookmarks.removeAll()
+        membership.removeAll()
+        bookmarkNames.removeAll()
+        persist()
+        persistNames()
+    }
+    #endif
+}

bitchat/Services/LocationChannelManager.swift

@@ -1,9 +1,9 @@
 import Foundation
-
-#if os(iOS)
-import CoreLocation
 import Combine
 
+#if os(iOS) || os(macOS)
+import CoreLocation
+
 /// Manages location permissions, one-shot location retrieval, and computing geohash channels.
 /// Not main-actor isolated to satisfy CLLocationManagerDelegate in Swift 6; state updates hop to MainActor.
 final class LocationChannelManager: NSObject, CLLocationManagerDelegate, ObservableObject {
@@ -39,7 +39,7 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         super.init()
         cl.delegate = self
         cl.desiredAccuracy = kCLLocationAccuracyHundredMeters
-        cl.distanceFilter = 1000 // meters; we're not tracking continuously
+        cl.distanceFilter = TransportConfig.locationDistanceFilterMeters // meters; we're not tracking continuously
         // Load selection
         if let data = UserDefaults.standard.data(forKey: userDefaultsKey),
            let channel = try? JSONDecoder().decode(ChannelID.self, from: data) {
@@ -50,23 +50,30 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
            let arr = try? JSONDecoder().decode([String].self, from: data) {
             teleportedSet = Set(arr)
         }
-        // Initialize teleported flag from persisted state if a location channel is selected
+        // Do not eagerly mark teleported on startup; wait for location to compute regional set.
-        if case .location(let ch) = selectedChannel {
+        // This avoids showing teleported for in-region channels during cold start.
-            teleported = teleportedSet.contains(ch.geohash)
-        }
         let status: CLAuthorizationStatus
-        if #available(iOS 14.0, *) {
+        if #available(iOS 14.0, macOS 11.0, *) {
             status = cl.authorizationStatus
         } else {
             status = CLLocationManager.authorizationStatus()
         }
         updatePermissionState(from: status)
+        // If we don't have location authorization at startup, fall back to persisted teleport state
+        switch status {
+        case .authorizedAlways, .authorizedWhenInUse, .authorized:
+            break // will compute from location
+        default:
+            if case .location(let ch) = selectedChannel {
+                teleported = teleportedSet.contains(ch.geohash)
+            }
+        }
     }
 
     // MARK: - Public API
     func enableLocationChannels() {
         let status: CLAuthorizationStatus
-        if #available(iOS 14.0, *) {
+        if #available(iOS 14.0, macOS 11.0, *) {
             status = cl.authorizationStatus
         } else {
             status = CLLocationManager.authorizationStatus()
@@ -78,7 +85,7 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
             Task { @MainActor in self.permissionState = .restricted }
         case .denied:
             Task { @MainActor in self.permissionState = .denied }
-        case .authorizedAlways, .authorizedWhenInUse:
+        case .authorizedAlways, .authorizedWhenInUse, .authorized:
             Task { @MainActor in self.permissionState = .authorized }
             requestOneShotLocation()
         @unknown default:
@@ -92,23 +99,30 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         }
     }
 
-    /// Begin periodic one-shot location refreshes while a selector UI is visible.
+    /// Begin continuous, distance-filtered updates while the channel sheet is visible.
-    func beginLiveRefresh(interval: TimeInterval = 5.0) {
+    /// Uses a 21m filter (configurable) to only refresh on meaningful movement.
+    func beginLiveRefresh(interval: TimeInterval = TransportConfig.locationLiveRefreshInterval) {
         guard permissionState == .authorized else { return }
-        // Switch to a lightweight periodic one-shot request (polling) while the sheet is open
+        // Stop any previous polling timer
         refreshTimer?.invalidate()
-        refreshTimer = Timer.scheduledTimer(withTimeInterval: interval, repeats: true) { [weak self] _ in
+        refreshTimer = nil
-            self?.requestOneShotLocation()
+        // Tighten accuracy and distance filter for live view
-        }
+        cl.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
-        // Kick off immediately
+        cl.distanceFilter = TransportConfig.locationDistanceFilterLiveMeters
+        // Start continuous updates
+        cl.startUpdatingLocation()
+        // Request an immediate fix to populate UI without waiting for movement
         requestOneShotLocation()
     }
 
-    /// Stop periodic refreshes when selector UI is dismissed.
+    /// Stop continuous refreshes when selector UI is dismissed.
     func endLiveRefresh() {
         refreshTimer?.invalidate()
         refreshTimer = nil
         cl.stopUpdatingLocation()
+        // Restore more relaxed defaults for background/idle state
+        cl.desiredAccuracy = kCLLocationAccuracyHundredMeters
+        cl.distanceFilter = TransportConfig.locationDistanceFilterMeters
     }
 
     func select(_ channel: ChannelID) {
@@ -122,7 +136,21 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
             case .mesh:
                 self.teleported = false
             case .location(let ch):
-                self.teleported = self.teleportedSet.contains(ch.geohash)
+                // If this geohash is in our current regional set, do NOT mark teleported.
+                let inRegional = self.availableChannels.contains { $0.geohash == ch.geohash }
+                if inRegional {
+                    self.teleported = false
+                    // Clear persisted teleport for this geohash to keep future selections clean
+                    if self.teleportedSet.contains(ch.geohash) {
+                        self.teleportedSet.remove(ch.geohash)
+                        if let data = try? JSONEncoder().encode(Array(self.teleportedSet)) {
+                            UserDefaults.standard.set(data, forKey: self.teleportedStoreKey)
+                        }
+                    }
+                } else {
+                    // Fall back to persisted mark (set by deep link or manual teleport)
+                    self.teleported = self.teleportedSet.contains(ch.geohash)
+                }
             }
         }
     }
@@ -151,8 +179,8 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         }
     }
 
-    // iOS 14+
+    // iOS 14+ / macOS 11+
-    @available(iOS 14.0, *)
+    @available(iOS 14.0, macOS 11.0, *)
     func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) {
         updatePermissionState(from: manager.authorizationStatus)
         if case .authorized = permissionState {
@@ -180,7 +208,7 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         case .notDetermined: newState = .notDetermined
         case .restricted: newState = .restricted
         case .denied: newState = .denied
-        case .authorizedAlways, .authorizedWhenInUse: newState = .authorized
+        case .authorizedAlways, .authorizedWhenInUse, .authorized: newState = .authorized
         @unknown default: newState = .restricted
         }
         Task { @MainActor in self.permissionState = newState }
@@ -195,14 +223,25 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         }
         Task { @MainActor in
             self.availableChannels = result
-            // Recompute teleported status based on persisted state OR current location vs selected channel
+            // Recompute teleported status based on whether the selected geohash is in our regional set
             switch self.selectedChannel {
             case .mesh:
                 self.teleported = false
             case .location(let ch):
-                let persisted = self.teleportedSet.contains(ch.geohash)
+                // Membership check using freshly computed regional channels; avoids precision/rename drift
-                let currentGH = Geohash.encode(latitude: coord.latitude, longitude: coord.longitude, precision: ch.level.precision)
+                let inRegional = result.contains { $0.geohash == ch.geohash }
-                self.teleported = persisted || (currentGH != ch.geohash)
+                if inRegional {
+                    self.teleported = false
+                    // Clear persisted teleport flag if present
+                    if self.teleportedSet.contains(ch.geohash) {
+                        self.teleportedSet.remove(ch.geohash)
+                        if let data = try? JSONEncoder().encode(Array(self.teleportedSet)) {
+                            UserDefaults.standard.set(data, forKey: self.teleportedStoreKey)
+                        }
+                    }
+                } else {
+                    self.teleported = true
+                }
             }
         }
     }
@@ -256,5 +295,4 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         return dict
     }
 }
-
 #endif

bitchat/Services/MessageRouter.swift

@@ -37,11 +37,11 @@ final class MessageRouter {
     }
 
     func sendPrivate(_ content: String, to peerID: String, recipientNickname: String, messageID: String) {
-        let hasMesh = mesh.isPeerConnected(peerID)
+        let reachableMesh = mesh.isPeerReachable(peerID)
-        let hasEstablished = mesh.getNoiseService().hasEstablishedSession(with: peerID)
+        if reachableMesh {
-        if hasMesh && hasEstablished {
+            SecureLogger.log("Routing PM via mesh (reachable) to \(peerID.prefix(8))… id=\(messageID.prefix(8))…",
-            SecureLogger.log("Routing PM via mesh to \(peerID.prefix(8))… id=\(messageID.prefix(8))…",
                             category: SecureLogger.session, level: .debug)
+            // BLEService will initiate a handshake if needed and queue the message
             mesh.sendPrivateMessage(content, to: peerID, recipientNickname: recipientNickname, messageID: messageID)
         } else if canSendViaNostr(peerID: peerID) {
             SecureLogger.log("Routing PM via Nostr to \(peerID.prefix(8))… id=\(messageID.prefix(8))…",
@@ -57,9 +57,9 @@ final class MessageRouter {
     }
 
     func sendReadReceipt(_ receipt: ReadReceipt, to peerID: String) {
-        // Prefer mesh only if a Noise session is established; else use Nostr to avoid handshakeRequired spam
+        // Prefer mesh for reachable peers; BLE will queue if handshake is needed
-        if mesh.isPeerConnected(peerID) && mesh.getNoiseService().hasEstablishedSession(with: peerID) {
+        if mesh.isPeerReachable(peerID) {
-            SecureLogger.log("Routing READ ack via mesh to \(peerID.prefix(8))… id=\(receipt.originalMessageID.prefix(8))…",
+            SecureLogger.log("Routing READ ack via mesh (reachable) to \(peerID.prefix(8))… id=\(receipt.originalMessageID.prefix(8))…",
                             category: SecureLogger.session, level: .debug)
             mesh.sendReadReceipt(receipt, to: peerID)
         } else {
@@ -70,7 +70,9 @@ final class MessageRouter {
     }
 
     func sendDeliveryAck(_ messageID: String, to peerID: String) {
-        if mesh.isPeerConnected(peerID) && mesh.getNoiseService().hasEstablishedSession(with: peerID) {
+        if mesh.isPeerReachable(peerID) {
+            SecureLogger.log("Routing DELIVERED ack via mesh (reachable) to \(peerID.prefix(8))… id=\(messageID.prefix(8))…",
+                            category: SecureLogger.session, level: .debug)
             mesh.sendDeliveryAck(for: messageID, to: peerID)
         } else {
             nostr.sendDeliveryAck(for: messageID, to: peerID)
@@ -101,7 +103,7 @@ final class MessageRouter {
                         category: SecureLogger.session, level: .debug)
         // Prefer mesh if connected; else try Nostr if mapping exists
         for (content, nickname, messageID) in queued {
-            if mesh.isPeerConnected(peerID) {
+            if mesh.isPeerReachable(peerID) {
                 SecureLogger.log("Outbox -> mesh for \(peerID.prefix(8))… id=\(messageID.prefix(8))…",
                                 category: SecureLogger.session, level: .debug)
                 mesh.sendPrivateMessage(content, to: peerID, recipientNickname: nickname, messageID: messageID)

bitchat/Services/NostrTransport.swift

@@ -20,7 +20,7 @@ final class NostrTransport: Transport {
     }
     private var readQueue: [QueuedRead] = []
     private var isSendingReadAcks = false
-    private let readAckInterval: TimeInterval = 0.35 // ~3 per second
+    private let readAckInterval: TimeInterval = TransportConfig.nostrReadAckInterval
 
     var myPeerID: String { senderPeerID }
     var myNickname: String { "" }
@@ -31,6 +31,7 @@ final class NostrTransport: Transport {
     func emergencyDisconnectAll() { /* no-op */ }
 
     func isPeerConnected(_ peerID: String) -> Bool { false }
+    func isPeerReachable(_ peerID: String) -> Bool { false }
     func peerNickname(peerID: String) -> String? { nil }
     func getPeerNicknames() -> [String : String] { [:] }
 
@@ -48,16 +49,7 @@ final class NostrTransport: Transport {
 
     func sendPrivateMessage(_ content: String, to peerID: String, recipientNickname: String, messageID: String) {
         Task { @MainActor in
-            // Resolve favorite by full noise key or by short peerID fallback
+            guard let recipientNpub = resolveRecipientNpub(for: peerID) else { return }
-            var recipientNostrPubkey: String?
-            if let noiseKey = Data(hexString: peerID),
-               let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: noiseKey) {
-                recipientNostrPubkey = fav.peerNostrPublicKey
-            }
-            if recipientNostrPubkey == nil, peerID.count == 16 {
-                recipientNostrPubkey = FavoritesPersistenceService.shared.getFavoriteStatus(forPeerID: peerID)?.peerNostrPublicKey
-            }
-            guard let recipientNpub = recipientNostrPubkey else { return }
             guard let senderIdentity = try? NostrIdentityBridge.getCurrentNostrIdentity() else { return }
             SecureLogger.log("NostrTransport: preparing PM to \(recipientNpub.prefix(16))… for peerID \(peerID.prefix(8))… id=\(messageID.prefix(8))…",
                             category: SecureLogger.session, level: .debug)
@@ -105,15 +97,7 @@ final class NostrTransport: Transport {
         guard !readQueue.isEmpty else { isSendingReadAcks = false; return }
         let item = readQueue.removeFirst()
         Task { @MainActor in
-            var recipientNostrPubkey: String?
+            guard let recipientNpub = resolveRecipientNpub(for: item.peerID) else { scheduleNextReadAck(); return }
-            if let noiseKey = Data(hexString: item.peerID),
-               let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: noiseKey) {
-                recipientNostrPubkey = fav.peerNostrPublicKey
-            }
-            if recipientNostrPubkey == nil, item.peerID.count == 16 {
-                recipientNostrPubkey = FavoritesPersistenceService.shared.getFavoriteStatus(forPeerID: item.peerID)?.peerNostrPublicKey
-            }
-            guard let recipientNpub = recipientNostrPubkey else { scheduleNextReadAck(); return }
             guard let senderIdentity = try? NostrIdentityBridge.getCurrentNostrIdentity() else { scheduleNextReadAck(); return }
             SecureLogger.log("NostrTransport: preparing READ ack for id=\(item.receipt.originalMessageID.prefix(8))… to \(recipientNpub.prefix(16))…",
                             category: SecureLogger.session, level: .debug)
@@ -149,15 +133,7 @@ final class NostrTransport: Transport {
 
     func sendFavoriteNotification(to peerID: String, isFavorite: Bool) {
         Task { @MainActor in
-            var recipientNostrPubkey: String?
+            guard let recipientNpub = resolveRecipientNpub(for: peerID) else { return }
-            if let noiseKey = Data(hexString: peerID),
-               let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: noiseKey) {
-                recipientNostrPubkey = fav.peerNostrPublicKey
-            }
-            if recipientNostrPubkey == nil, peerID.count == 16 {
-                recipientNostrPubkey = FavoritesPersistenceService.shared.getFavoriteStatus(forPeerID: peerID)?.peerNostrPublicKey
-            }
-            guard let recipientNpub = recipientNostrPubkey else { return }
             guard let senderIdentity = try? NostrIdentityBridge.getCurrentNostrIdentity() else { return }
             let content = isFavorite ? "[FAVORITED]:\(senderIdentity.npub)" : "[UNFAVORITED]:\(senderIdentity.npub)"
             SecureLogger.log("NostrTransport: preparing FAVORITE(\(isFavorite)) to \(recipientNpub.prefix(16))…",
@@ -183,18 +159,26 @@ final class NostrTransport: Transport {
         }
     }
 
+    // MARK: - Helpers
+    @MainActor
+    private func resolveRecipientNpub(for peerID: String) -> String? {
+        if let noiseKey = Data(hexString: peerID),
+           let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: noiseKey),
+           let npub = fav.peerNostrPublicKey {
+            return npub
+        }
+        if peerID.count == 16,
+           let fav = FavoritesPersistenceService.shared.getFavoriteStatus(forPeerID: peerID),
+           let npub = fav.peerNostrPublicKey {
+            return npub
+        }
+        return nil
+    }
+
     func sendBroadcastAnnounce() { /* no-op for Nostr */ }
     func sendDeliveryAck(for messageID: String, to peerID: String) {
         Task { @MainActor in
-            var recipientNostrPubkey: String?
+            guard let recipientNpub = resolveRecipientNpub(for: peerID) else { return }
-            if let noiseKey = Data(hexString: peerID),
-               let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: noiseKey) {
-                recipientNostrPubkey = fav.peerNostrPublicKey
-            }
-            if recipientNostrPubkey == nil, peerID.count == 16 {
-                recipientNostrPubkey = FavoritesPersistenceService.shared.getFavoriteStatus(forPeerID: peerID)?.peerNostrPublicKey
-            }
-            guard let recipientNpub = recipientNostrPubkey else { return }
             guard let senderIdentity = try? NostrIdentityBridge.getCurrentNostrIdentity() else { return }
             SecureLogger.log("NostrTransport: preparing DELIVERED ack for id=\(messageID.prefix(8))… to \(recipientNpub.prefix(16))…",
                             category: SecureLogger.session, level: .debug)

bitchat/Services/NotificationService.swift

@@ -90,6 +90,15 @@ class NotificationService {
         }
     }
     
+    // Geohash public chat notification with deep link to a specific geohash
+    func sendGeohashActivityNotification(geohash: String, titlePrefix: String = "#", bodyPreview: String) {
+        let title = "\(titlePrefix)\(geohash)"
+        let identifier = "geo-activity-\(geohash)-\(Date().timeIntervalSince1970)"
+        let deeplink = "bitchat://geohash/\(geohash)"
+        let userInfo: [String: Any] = ["deeplink": deeplink]
+        sendLocalNotification(title: title, body: bodyPreview, identifier: identifier, userInfo: userInfo)
+    }
+
     func sendNetworkAvailableNotification(peerCount: Int) {
         let title = "👥 bitchatters nearby!"
         let body = peerCount == 1 ? "1 person around" : "\(peerCount) people around"

bitchat/Services/PrivateChatManager.swift

@@ -27,7 +27,7 @@ class PrivateChatManager: ObservableObject {
     }
 
     // Cap for messages stored per private chat
-    private let privateChatCap = 1337
+    private let privateChatCap = TransportConfig.privateChatCap
     
     /// Start a private chat with a peer
     func startChat(with peerID: String) {

bitchat/Services/RelayController.swift

@@ -12,14 +12,27 @@ struct RelayController {
     static func decide(ttl: UInt8,
                        senderIsSelf: Bool,
                        isEncrypted: Bool,
+                       isDirectedEncrypted: Bool,
                        isDirectedFragment: Bool,
                        isHandshake: Bool,
+                       isAnnounce: Bool,
                        degree: Int,
                        highDegreeThreshold: Int) -> RelayDecision {
         // Suppress obvious non-relays
         if ttl <= 1 || senderIsSelf { return RelayDecision(shouldRelay: false, newTTL: ttl, delayMs: 0) }
 
-        // Degree-aware probability to reduce floods in dense graphs
+        // For session-critical or directed traffic, be deterministic and reliable
+        if isHandshake || isDirectedFragment || isDirectedEncrypted {
+            // Always relay with no TTL cap for these types
+            let newTTL = (ttl &- 1)
+            // Slight jitter to desynchronize without adding too much latency
+            // Tighter for faster multi-hop handshakes and directed DMs
+            let delayRange: ClosedRange<Int> = isHandshake ? 10...35 : 20...60
+            let delayMs = Int.random(in: delayRange)
+            return RelayDecision(shouldRelay: true, newTTL: newTTL, delayMs: delayMs)
+        }
+
+        // Degree-aware probability to reduce floods in dense graphs (broadcast/public)
         let baseProb: Double
         switch degree {
         case 0...2: baseProb = 1.0
@@ -28,20 +41,29 @@ struct RelayController {
         case 7...9: baseProb = 0.55
         default:    baseProb = 0.45
         }
-        var prob = baseProb
+        let prob = baseProb
-        if isHandshake { prob = max(0.3, baseProb - 0.2) }
-
-        // Sample a forwarding decision
         let shouldRelay = Double.random(in: 0...1) <= prob
 
-        // TTL clamping in dense graphs
+        // TTL clamping for broadcast
-        let ttlCap: UInt8 = degree >= highDegreeThreshold ? 3 : 5
+        // - Dense graphs: keep very low to avoid floods
+        // - Sparse graphs: allow slightly longer reach for multi-hop discovery
+        // - Announces in sparse graphs get a bit more headroom
+        let ttlCap: UInt8 = {
+            if degree >= highDegreeThreshold { return 3 }
+            return isAnnounce ? 7 : 6
+        }()
         let clamped = max(1, min(ttl, ttlCap))
         let newTTL = clamped &- 1
 
-        // Short jitter to desynchronize rebroadcasts
+        // Wider jitter window to allow duplicate suppression to win more often
-        let delayMs = Int.random(in: 20...80)
+        // For sparse graphs (<=2), relay quickly to avoid cancellation races
+        let delayMs: Int
+        switch degree {
+        case 0...2: delayMs = Int.random(in: 10...40)
+        case 3...5: delayMs = Int.random(in: 60...150)
+        case 6...9: delayMs = Int.random(in: 80...180)
+        default:    delayMs = Int.random(in: 100...220)
+        }
         return RelayDecision(shouldRelay: shouldRelay, newTTL: newTTL, delayMs: delayMs)
     }
 }
-

bitchat/Services/Transport.swift

@@ -3,7 +3,7 @@ import Combine
 
 /// Abstract transport interface used by ChatViewModel and services.
 /// BLEService implements this protocol; a future Nostr transport can too.
-struct TransportPeerSnapshot {
+struct TransportPeerSnapshot: Equatable, Hashable {
     let id: String
     let nickname: String
     let isConnected: Bool
@@ -29,6 +29,7 @@ protocol Transport: AnyObject {
 
     // Connectivity and peers
     func isPeerConnected(_ peerID: String) -> Bool
+    func isPeerReachable(_ peerID: String) -> Bool
     func peerNickname(peerID: String) -> String?
     func getPeerNicknames() -> [String: String]
 
@@ -46,11 +47,20 @@ protocol Transport: AnyObject {
     func sendBroadcastAnnounce()
     func sendDeliveryAck(for messageID: String, to peerID: String)
 
+    // QR verification (optional for transports)
+    func sendVerifyChallenge(to peerID: String, noiseKeyHex: String, nonceA: Data)
+    func sendVerifyResponse(to peerID: String, noiseKeyHex: String, nonceA: Data)
+
     // Peer snapshots (for non-UI services)
     var peerSnapshotPublisher: AnyPublisher<[TransportPeerSnapshot], Never> { get }
     func currentPeerSnapshots() -> [TransportPeerSnapshot]
 }
 
+extension Transport {
+    func sendVerifyChallenge(to peerID: String, noiseKeyHex: String, nonceA: Data) {}
+    func sendVerifyResponse(to peerID: String, noiseKeyHex: String, nonceA: Data) {}
+}
+
 protocol TransportPeerEventsDelegate: AnyObject {
     @MainActor func didUpdatePeerSnapshots(_ peers: [TransportPeerSnapshot])
 }

bitchat/Services/TransportConfig.swift

@@ -0,0 +1,192 @@
+import Foundation
+
+/// Centralized knobs for transport- and UI-related limits.
+/// Keep values aligned with existing behavior when replacing magic numbers.
+enum TransportConfig {
+    // BLE / Protocol
+    static let bleDefaultFragmentSize: Int = 469            // ~512 MTU minus protocol overhead
+    static let messageTTLDefault: UInt8 = 7                 // Default TTL for mesh flooding
+    static let bleMaxInFlightAssemblies: Int = 128          // Cap concurrent fragment assemblies
+    static let bleHighDegreeThreshold: Int = 6              // For adaptive TTL/probabilistic relays
+
+    // UI / Storage Caps
+    static let privateChatCap: Int = 1337
+    static let meshTimelineCap: Int = 1337
+    static let geoTimelineCap: Int = 1337
+    static let contentLRUCap: Int = 2000
+
+    // Timers
+    static let networkResetGraceSeconds: TimeInterval = 600 // 10 minutes
+    static let basePublicFlushInterval: TimeInterval = 0.08  // ~12.5 fps batching
+
+    // BLE duty/announce/connect
+    static let bleConnectRateLimitInterval: TimeInterval = 0.5
+    static let bleMaxCentralLinks: Int = 6
+    static let bleDutyOnDuration: TimeInterval = 5.0
+    static let bleDutyOffDuration: TimeInterval = 10.0
+    static let bleAnnounceMinInterval: TimeInterval = 1.0
+
+    // BLE discovery/quality thresholds
+    static let bleDynamicRSSIThresholdDefault: Int = -90
+    static let bleConnectionCandidatesMax: Int = 100
+    static let blePendingWriteBufferCapBytes: Int = 1_000_000
+    static let blePendingNotificationsCapCount: Int = 20
+
+    // Nostr
+    static let nostrReadAckInterval: TimeInterval = 0.35 // ~3 per second
+
+    // UI thresholds
+    static let uiLateInsertThreshold: TimeInterval = 15.0
+    static let uiProcessedNostrEventsCap: Int = 2000
+    static let uiChannelInactivityThresholdSeconds: TimeInterval = 9 * 60
+    
+    // UI rate limiters (token buckets)
+    static let uiSenderRateBucketCapacity: Double = 5
+    static let uiSenderRateBucketRefillPerSec: Double = 1.0
+    static let uiContentRateBucketCapacity: Double = 3
+    static let uiContentRateBucketRefillPerSec: Double = 0.5
+
+    // UI sleeps/delays
+    static let uiStartupInitialDelaySeconds: TimeInterval = 1.0
+    static let uiStartupShortSleepNs: UInt64 = 200_000_000
+    static let uiStartupPhaseDurationSeconds: TimeInterval = 2.0
+    static let uiAsyncShortSleepNs: UInt64 = 100_000_000
+    static let uiAsyncMediumSleepNs: UInt64 = 500_000_000
+    static let uiReadReceiptRetryShortSeconds: TimeInterval = 0.1
+    static let uiReadReceiptRetryLongSeconds: TimeInterval = 0.5
+    static let uiBatchDispatchStaggerSeconds: TimeInterval = 0.15
+    static let uiScrollThrottleSeconds: TimeInterval = 0.5
+    static let uiAnimationShortSeconds: TimeInterval = 0.15
+    static let uiAnimationMediumSeconds: TimeInterval = 0.2
+    static let uiAnimationSidebarSeconds: TimeInterval = 0.25
+    static let uiRecentCutoffFiveMinutesSeconds: TimeInterval = 5 * 60
+
+    // BLE maintenance & thresholds
+    static let bleMaintenanceInterval: TimeInterval = 5.0
+    static let bleMaintenanceLeewaySeconds: Int = 1
+    static let bleIsolationRelaxThresholdSeconds: TimeInterval = 60
+    static let bleRecentTimeoutWindowSeconds: TimeInterval = 60
+    static let bleRecentTimeoutCountThreshold: Int = 3
+    static let bleRSSIIsolatedBase: Int = -90
+    static let bleRSSIIsolatedRelaxed: Int = -92
+    static let bleRSSIConnectedThreshold: Int = -85
+    static let bleRSSIHighTimeoutThreshold: Int = -80
+    // How long without seeing traffic before we sanity-check the direct link
+    // Lowered to make connected→reachable icon changes react faster when walking out of range
+    static let blePeerInactivityTimeoutSeconds: TimeInterval = 8.0
+    // How long to retain a peer as "reachable" (not directly connected) since lastSeen
+    static let bleReachabilityRetentionVerifiedSeconds: TimeInterval = 21.0    // 21s for verified/favorites
+    static let bleReachabilityRetentionUnverifiedSeconds: TimeInterval = 21.0  // 21s for unknown/unverified
+    static let bleFragmentLifetimeSeconds: TimeInterval = 30.0
+    static let bleIngressRecordLifetimeSeconds: TimeInterval = 3.0
+    static let bleConnectTimeoutBackoffWindowSeconds: TimeInterval = 120.0
+    static let bleRecentPacketWindowSeconds: TimeInterval = 30.0
+    static let bleRecentPacketWindowMaxCount: Int = 100
+    // Keep scanning fully ON when we saw traffic very recently
+    static let bleRecentTrafficForceScanSeconds: TimeInterval = 10.0
+    static let bleThreadSleepWriteShortDelaySeconds: TimeInterval = 0.05
+    static let bleExpectedWritePerFragmentMs: Int = 8
+    static let bleExpectedWriteMaxMs: Int = 2000
+    // Faster fragment pacing; use slightly tighter spacing for directed trains
+    static let bleFragmentSpacingMs: Int = 5
+    static let bleFragmentSpacingDirectedMs: Int = 4
+    static let bleAnnounceIntervalSeconds: TimeInterval = 4.0
+    static let bleDutyOnDurationDense: TimeInterval = 3.0
+    static let bleDutyOffDurationDense: TimeInterval = 15.0
+    static let bleConnectedAnnounceBaseSecondsDense: TimeInterval = 30.0
+    static let bleConnectedAnnounceBaseSecondsSparse: TimeInterval = 15.0
+    static let bleConnectedAnnounceJitterDense: TimeInterval = 8.0
+    static let bleConnectedAnnounceJitterSparse: TimeInterval = 4.0
+
+    // Location
+    static let locationDistanceFilterMeters: Double = 1000
+    // Live (channel sheet open) distance threshold for meaningful updates
+    static let locationDistanceFilterLiveMeters: Double = 21.0
+    static let locationLiveRefreshInterval: TimeInterval = 5.0
+
+    // Notifications (geohash)
+    static let uiGeoNotifyCooldownSeconds: TimeInterval = 60.0
+    static let uiGeoNotifySnippetMaxLen: Int = 80
+
+    // Nostr geohash
+    static let nostrGeohashInitialLookbackSeconds: TimeInterval = 3600
+    static let nostrGeohashInitialLimit: Int = 200
+    static let nostrGeoRelayCount: Int = 5
+    static let nostrGeohashSampleLookbackSeconds: TimeInterval = 300
+    static let nostrGeohashSampleLimit: Int = 100
+    static let nostrDMSubscribeLookbackSeconds: TimeInterval = 86400
+
+    // Nostr helpers
+    static let nostrShortKeyDisplayLength: Int = 8
+    static let nostrConvKeyPrefixLength: Int = 16
+
+    // Compression
+    static let compressionThresholdBytes: Int = 100
+
+    // Message deduplication
+    static let messageDedupMaxAgeSeconds: TimeInterval = 300
+    static let messageDedupMaxCount: Int = 1000
+
+    // Verification QR
+    static let verificationQRMaxAgeSeconds: TimeInterval = 5 * 60
+
+    // Nostr relay backoff
+    static let nostrRelayInitialBackoffSeconds: TimeInterval = 1.0
+    static let nostrRelayMaxBackoffSeconds: TimeInterval = 300.0
+    static let nostrRelayBackoffMultiplier: Double = 2.0
+    static let nostrRelayMaxReconnectAttempts: Int = 10
+    static let nostrRelayDefaultFetchLimit: Int = 100
+
+    // Geo relay directory
+    static let geoRelayFetchIntervalSeconds: TimeInterval = 60 * 60 * 24
+
+    // BLE operational delays
+    static let bleInitialAnnounceDelaySeconds: TimeInterval = 0.6
+    static let bleConnectTimeoutSeconds: TimeInterval = 8.0
+    static let bleRestartScanDelaySeconds: TimeInterval = 0.1
+    static let blePostSubscribeAnnounceDelaySeconds: TimeInterval = 0.05
+    static let blePostAnnounceDelaySeconds: TimeInterval = 0.4
+    static let bleForceAnnounceMinIntervalSeconds: TimeInterval = 0.15
+
+    // Store-and-forward for directed packets at relays
+    static let bleDirectedSpoolWindowSeconds: TimeInterval = 15.0
+
+    // Log/UI debounce windows
+    // Shorter debounce so UI reacts faster while still suppressing duplicate callbacks
+    static let bleDisconnectNotifyDebounceSeconds: TimeInterval = 0.9
+    static let bleReconnectLogDebounceSeconds: TimeInterval = 2.0
+
+    // Weak-link cooldown after connection timeouts
+    static let bleWeakLinkCooldownSeconds: TimeInterval = 30.0
+    static let bleWeakLinkRSSICutoff: Int = -90
+
+    // Content hashing / formatting
+    static let contentKeyPrefixLength: Int = 256
+    static let uiLongMessageLengthThreshold: Int = 2000
+    static let uiVeryLongTokenThreshold: Int = 512
+    static let uiLongMessageLineLimit: Int = 30
+    static let uiFingerprintSampleCount: Int = 3
+    
+    // UI swipe/gesture thresholds
+    static let uiBackSwipeTranslationLarge: CGFloat = 50
+    static let uiBackSwipeTranslationSmall: CGFloat = 30
+    static let uiBackSwipeVelocityThreshold: CGFloat = 300
+    
+    // UI color tuning
+    static let uiColorHueAvoidanceDelta: Double = 0.05
+    static let uiColorHueOffset: Double = 0.12
+    // Peer list palette
+    static let uiPeerPaletteSlots: Int = 36
+    static let uiPeerPaletteRingBrightnessDeltaLight: Double = 0.07
+    static let uiPeerPaletteRingBrightnessDeltaDark: Double = -0.07
+
+    // UI windowing (infinite scroll)
+    static let uiWindowInitialCountPublic: Int = 300
+    static let uiWindowInitialCountPrivate: Int = 300
+    static let uiWindowStepCount: Int = 200
+
+    // Share extension
+    static let uiShareExtensionDismissDelaySeconds: TimeInterval = 0.3
+    static let uiShareAcceptWindowSeconds: TimeInterval = 30.0
+    static let uiMigrationCutoffSeconds: TimeInterval = 24 * 60 * 60
+}

bitchat/Services/UnifiedPeerService.swift

@@ -68,24 +68,28 @@ class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
     
     private func updatePeers() {
         let meshPeers = meshService.currentPeerSnapshots()
+        // If we have no direct links at all, peers should not be marked reachable
+        // "Reachable" means mesh-attached via at least one live link.
+        let hasAnyConnected = meshPeers.contains { $0.isConnected }
         let favorites = favoritesService.favorites
         
         var enrichedPeers: [BitchatPeer] = []
         var connected: Set<String> = []
         var addedPeerIDs: Set<String> = []
         
-        // Phase 1: Add all connected mesh peers
+        // Phase 1: Add all mesh peers (connected and reachable)
-        for peerInfo in meshPeers where peerInfo.isConnected {
+        for peerInfo in meshPeers {
             let peerID = peerInfo.id
             guard peerID != meshService.myPeerID else { continue }  // Never add self
             
             let peer = buildPeerFromMesh(
                 peerInfo: peerInfo,
-                favorites: favorites
+                favorites: favorites,
+                meshAttached: hasAnyConnected
             )
             
             enrichedPeers.append(peer)
-            connected.insert(peerID)
+            if peer.isConnected { connected.insert(peerID) }
             addedPeerIDs.insert(peerID)
             
             // Update fingerprint cache
@@ -117,14 +121,12 @@ class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
         
         // Phase 3: Sort peers
         enrichedPeers.sort { lhs, rhs in
-            // Connected first
+            // Connectivity rank: connected > reachable > others
-            if lhs.isConnected != rhs.isConnected {
+            func rank(_ p: BitchatPeer) -> Int { p.isConnected ? 2 : (p.isReachable ? 1 : 0) }
-                return lhs.isConnected
+            let lr = rank(lhs), rr = rank(rhs)
-            }
+            if lr != rr { return lr > rr }
-            // Then favorites
+            // Then favorites inside same rank
-            if lhs.isFavorite != rhs.isFavorite {
+            if lhs.isFavorite != rhs.isFavorite { return lhs.isFavorite }
-                return lhs.isFavorite
-            }
             // Finally alphabetical
             return lhs.displayName < rhs.displayName
         }
@@ -145,8 +147,11 @@ class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
             }
         }
         
-        // Phase 5: Update published properties
+        // Phase 5: Filter out offline non-mutual peers and update published properties
-        self.peers = enrichedPeers
+        let filtered = enrichedPeers.filter { p in
+            p.isConnected || p.isReachable || p.isMutualFavorite
+        }
+        self.peers = filtered
         self.connectedPeerIDs = connected
         self.favorites = favoritesList
         self.mutualFavorites = mutualsList
@@ -162,14 +167,26 @@ class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
     
     private func buildPeerFromMesh(
         peerInfo: TransportPeerSnapshot,
-        favorites: [Data: FavoritesPersistenceService.FavoriteRelationship]
+        favorites: [Data: FavoritesPersistenceService.FavoriteRelationship],
+        meshAttached: Bool
     ) -> BitchatPeer {
+        // Determine reachability based on lastSeen and identity trust
+        let now = Date()
+        let fingerprint = peerInfo.noisePublicKey?.sha256Fingerprint()
+        let isVerified = fingerprint.map { SecureIdentityStateManager.shared.isVerified(fingerprint: $0) } ?? false
+        let isFav = peerInfo.noisePublicKey.flatMap { favorites[$0]?.isFavorite } ?? false
+        let retention: TimeInterval = (isVerified || isFav) ? TransportConfig.bleReachabilityRetentionVerifiedSeconds : TransportConfig.bleReachabilityRetentionUnverifiedSeconds
+        // A peer is reachable if we recently saw them AND we are attached to the mesh
+        let withinRetention = now.timeIntervalSince(peerInfo.lastSeen) <= retention
+        let isReachable = peerInfo.isConnected ? true : (withinRetention && meshAttached)
+
         var peer = BitchatPeer(
             id: peerInfo.id,
             noisePublicKey: peerInfo.noisePublicKey ?? Data(),
             nickname: peerInfo.nickname,
             lastSeen: peerInfo.lastSeen,
-            isConnected: true
+            isConnected: peerInfo.isConnected,
+            isReachable: isReachable
         )
         
         // Check for favorite status
@@ -216,7 +233,8 @@ class UnifiedPeerService: ObservableObject, TransportPeerEventsDelegate {
             noisePublicKey: favorite.peerNoisePublicKey,
             nickname: favorite.peerNickname,
             lastSeen: favorite.lastUpdated,
-            isConnected: false
+            isConnected: false,
+            isReachable: false
         )
         
         peer.favoriteStatus = favorite

bitchat/Services/VerificationService.swift

@@ -0,0 +1,185 @@
+import Foundation
+import CryptoKit
+
+/// QR verification scaffolding: schema, signing, and basic challenge/response helpers.
+final class VerificationService {
+    static let shared = VerificationService()
+
+    // Injected Noise service from the running transport (do NOT create new BLEService)
+    private var noise: NoiseEncryptionService?
+    func configure(with noise: NoiseEncryptionService) { self.noise = noise }
+
+    /// Encapsulates the data encoded into a verification QR
+    struct VerificationQR: Codable {
+        let v: Int
+        let noiseKeyHex: String
+        let signKeyHex: String
+        let npub: String?
+        let nickname: String
+        let ts: Int64
+        let nonceB64: String
+        var sigHex: String
+
+        static let context = "bitchat-verify-v1"
+
+        /// Canonical bytes used for signature (deterministic ordering)
+        func canonicalBytes() -> Data {
+            var out = Data()
+            func appendField(_ s: String) {
+                let d = s.data(using: .utf8) ?? Data()
+                out.append(UInt8(min(d.count, 255)))
+                out.append(d.prefix(255))
+            }
+            appendField(Self.context)
+            appendField(String(v))
+            appendField(noiseKeyHex.lowercased())
+            appendField(signKeyHex.lowercased())
+            appendField(npub ?? "")
+            appendField(nickname)
+            appendField(String(ts))
+            appendField(nonceB64)
+            return out
+        }
+
+        func toURLString() -> String {
+            var comps = URLComponents()
+            comps.scheme = "bitchat"
+            comps.host = "verify"
+            comps.queryItems = [
+                URLQueryItem(name: "v", value: String(v)),
+                URLQueryItem(name: "noise", value: noiseKeyHex),
+                URLQueryItem(name: "sign", value: signKeyHex),
+                URLQueryItem(name: "nick", value: nickname),
+                URLQueryItem(name: "ts", value: String(ts)),
+                URLQueryItem(name: "nonce", value: nonceB64),
+                URLQueryItem(name: "sig", value: sigHex)
+            ] + (npub != nil ? [URLQueryItem(name: "npub", value: npub)] : [])
+            return comps.string ?? ""
+        }
+
+        static func fromURL(_ url: URL) -> VerificationQR? {
+            guard url.scheme == "bitchat", url.host == "verify",
+                  let items = URLComponents(url: url, resolvingAgainstBaseURL: false)?.queryItems else { return nil }
+            func val(_ name: String) -> String? { items.first(where: { $0.name == name })?.value }
+            guard let vStr = val("v"), let v = Int(vStr),
+                  let noise = val("noise"), let sign = val("sign"),
+                  let nick = val("nick"), let tsStr = val("ts"), let ts = Int64(tsStr),
+                  let nonce = val("nonce"), let sig = val("sig") else { return nil }
+            return VerificationQR(v: v, noiseKeyHex: noise, signKeyHex: sign, npub: val("npub"), nickname: nick, ts: ts, nonceB64: nonce, sigHex: sig)
+        }
+    }
+
+    // MARK: - Public API
+
+    /// Build a signed QR string for the current identity
+    func buildMyQRString(nickname: String, npub: String?) -> String? {
+        // Simple short-lived cache to speed up sheet opening
+        struct Cache { static var last: (nick: String, npub: String?, builtAt: Date, value: String)? }
+        if let c = Cache.last, c.nick == nickname, c.npub == npub, Date().timeIntervalSince(c.builtAt) < 60 {
+            return c.value
+        }
+        guard let noise = noise else { return nil }
+        let noiseKey = noise.getStaticPublicKeyData().hexEncodedString()
+        let signKey = noise.getSigningPublicKeyData().hexEncodedString()
+        let ts = Int64(Date().timeIntervalSince1970)
+        var nonce = Data(count: 16)
+        _ = nonce.withUnsafeMutableBytes { SecRandomCopyBytes(kSecRandomDefault, 16, $0.baseAddress!) }
+        let nonceB64 = nonce.base64EncodedString().replacingOccurrences(of: "+", with: "-").replacingOccurrences(of: "/", with: "_").replacingOccurrences(of: "=", with: "")
+        let payload = VerificationQR(v: 1, noiseKeyHex: noiseKey, signKeyHex: signKey, npub: npub, nickname: nickname, ts: ts, nonceB64: nonceB64, sigHex: "")
+        let msg = payload.canonicalBytes()
+        guard let sig = noise.signData(msg) else { return nil }
+        let signed = VerificationQR(v: payload.v,
+                                    noiseKeyHex: payload.noiseKeyHex,
+                                    signKeyHex: payload.signKeyHex,
+                                    npub: payload.npub,
+                                    nickname: payload.nickname,
+                                    ts: payload.ts,
+                                    nonceB64: payload.nonceB64,
+                                    sigHex: sig.map { String(format: "%02x", $0) }.joined())
+        let out = signed.toURLString()
+        Cache.last = (nickname, npub, Date(), out)
+        return out
+    }
+
+    /// Verify a scanned QR and return the parsed payload if valid (signature + freshness checks)
+    func verifyScannedQR(_ urlString: String, maxAge: TimeInterval = TransportConfig.verificationQRMaxAgeSeconds) -> VerificationQR? {
+        guard let url = URL(string: urlString), let qr = VerificationQR.fromURL(url) else { return nil }
+        // Freshness
+        let now = Date().timeIntervalSince1970
+        if now - Double(qr.ts) > maxAge { return nil }
+        // Verify signature using embedded ed25519 signKey
+        guard let sig = Data(hexString: qr.sigHex), let signKey = Data(hexString: qr.signKeyHex) else { return nil }
+        guard let noise = noise else { return nil }
+        let ok = noise.verifySignature(sig, for: qr.canonicalBytes(), publicKey: signKey)
+        return ok ? qr : nil
+    }
+
+    // MARK: - Noise payloads (scaffold only)
+
+    func buildVerifyChallenge(noiseKeyHex: String, nonceA: Data) -> Data {
+        // TLV: [0x01 len noiseKeyHex ascii] [0x02 len nonceA]
+        var tlv = Data()
+        let n0: [UInt8] = [0x01, UInt8(min(noiseKeyHex.count, 255))]
+        tlv.append(contentsOf: n0)
+        tlv.append(noiseKeyHex.data(using: .utf8)!.prefix(255))
+        tlv.append(0x02)
+        tlv.append(UInt8(min(nonceA.count, 255)))
+        tlv.append(nonceA.prefix(255))
+        return NoisePayload(type: .verifyChallenge, data: tlv).encode()
+    }
+
+    func buildVerifyResponse(noiseKeyHex: String, nonceA: Data) -> Data? {
+        // Sign context: verify-response | noiseKeyHex | nonceA
+        var msg = Data("bitchat-verify-resp-v1".utf8)
+        let nk = noiseKeyHex.data(using: .utf8) ?? Data()
+        msg.append(UInt8(min(nk.count, 255))); msg.append(nk.prefix(255))
+        msg.append(nonceA)
+        guard let noise = noise, let sig = noise.signData(msg) else { return nil }
+        var tlv = Data()
+        tlv.append(0x01); tlv.append(UInt8(min(nk.count, 255))); tlv.append(nk.prefix(255))
+        tlv.append(0x02); tlv.append(UInt8(min(nonceA.count, 255))); tlv.append(nonceA.prefix(255))
+        tlv.append(0x03); tlv.append(UInt8(min(sig.count, 255))); tlv.append(sig.prefix(255))
+        return NoisePayload(type: .verifyResponse, data: tlv).encode()
+    }
+
+    func parseVerifyChallenge(_ data: Data) -> (noiseKeyHex: String, nonceA: Data)? {
+        var idx = 0
+        func take(_ n: Int) -> Data? {
+            guard idx + n <= data.count else { return nil }
+            let d = data[idx..<(idx+n)]
+            idx += n
+            return Data(d)
+        }
+        // Expect type already stripped; we receive only TLV here
+        // TLV 0x01 noiseKeyHex
+        guard let t1 = take(1), t1[0] == 0x01, let l1 = take(1), let s1 = take(Int(l1[0])),
+              let noiseStr = String(data: s1, encoding: .utf8) else { return nil }
+        // TLV 0x02 nonceA
+        guard let t2 = take(1), t2[0] == 0x02, let l2 = take(1), let nA = take(Int(l2[0])) else { return nil }
+        return (noiseStr, nA)
+    }
+
+    func parseVerifyResponse(_ data: Data) -> (noiseKeyHex: String, nonceA: Data, signature: Data)? {
+        var idx = 0
+        func take(_ n: Int) -> Data? {
+            guard idx + n <= data.count else { return nil }
+            let d = data[idx..<(idx+n)]
+            idx += n
+            return Data(d)
+        }
+        guard let t1 = take(1), t1[0] == 0x01, let l1 = take(1), let s1 = take(Int(l1[0])),
+              let noiseStr = String(data: s1, encoding: .utf8) else { return nil }
+        guard let t2 = take(1), t2[0] == 0x02, let l2 = take(1), let nA = take(Int(l2[0])) else { return nil }
+        guard let t3 = take(1), t3[0] == 0x03, let l3 = take(1), let sig = take(Int(l3[0])) else { return nil }
+        return (noiseStr, nA, sig)
+    }
+
+    func verifyResponseSignature(noiseKeyHex: String, nonceA: Data, signature: Data, signerPublicKeyHex: String) -> Bool {
+        var msg = Data("bitchat-verify-resp-v1".utf8)
+        let nk = noiseKeyHex.data(using: .utf8) ?? Data()
+        msg.append(UInt8(min(nk.count, 255))); msg.append(nk.prefix(255))
+        msg.append(nonceA)
+        guard let noise = noise, let pub = Data(hexString: signerPublicKeyHex) else { return false }
+        return noise.verifySignature(signature, for: msg, publicKey: pub)
+    }
+}

bitchat/Utils/CompressionUtil.swift

@@ -11,7 +11,7 @@ import Compression
 
 struct CompressionUtil {
     // Compression threshold - don't compress if data is smaller than this
-    static let compressionThreshold = 100 // bytes
+    static let compressionThreshold = TransportConfig.compressionThresholdBytes // bytes
     
     // Compress data using zlib algorithm (most compatible)
     static func compress(_ data: Data) -> Data? {

bitchat/Utils/InputValidator.swift

@@ -18,14 +18,18 @@ struct InputValidator {
     
     /// Validates a peer ID from any source (short 16-hex, full 64-hex, or internal alnum/-/_ up to 64)
     static func validatePeerID(_ peerID: String) -> Bool {
-        // Accept short routing IDs (16-hex)
+        // Accept short routing IDs (exact 16-hex)
         if PeerIDResolver.isShortID(peerID) { return true }
-        // Accept full Noise key hex (64-hex)
+        // If length equals short-hex length but isn't valid hex, reject
+        if peerID.count == Limits.hexPeerIDLength { return false }
+        // Accept full Noise key hex (exact 64-hex)
         if PeerIDResolver.isNoiseKeyHex(peerID) { return true }
-        // Internal format: alphanumeric + dash/underscore up to 64
+        // If length equals full key length but isn't valid hex, reject
+        if peerID.count == Limits.maxPeerIDLength { return false }
+        // Internal format: alphanumeric + dash/underscore up to 63 (not 16 or 64)
         let validCharset = CharacterSet.alphanumerics.union(CharacterSet(charactersIn: "-_"))
         return !peerID.isEmpty &&
-               peerID.count <= Limits.maxPeerIDLength &&
+               peerID.count < Limits.maxPeerIDLength &&
                peerID.rangeOfCharacter(from: validCharset.inverted) == nil
     }
     

bitchat/Utils/MessageDeduplicator.swift

@@ -11,8 +11,8 @@ final class MessageDeduplicator {
     private var entries: [Entry] = []
     private var lookup = Set<String>()
     private let lock = NSLock()
-    private let maxAge: TimeInterval = 300  // 5 minutes
+    private let maxAge: TimeInterval = TransportConfig.messageDedupMaxAgeSeconds  // 5 minutes
-    private let maxCount = 1000
+    private let maxCount = TransportConfig.messageDedupMaxCount
 
     /// Check if message is duplicate and add if not
     func isDuplicate(_ messageID: String) -> Bool {
@@ -84,4 +84,3 @@ final class MessageDeduplicator {
         }
     }
 }
-

bitchat/Utils/PeerDisplayNameResolver.swift

@@ -0,0 +1,29 @@
+import Foundation
+
+/// Resolves a stable display name for peers, adding a short suffix when collisions exist.
+struct PeerDisplayNameResolver {
+    /// Computes display names with a `#xxxx` suffix for connected peers when nickname collisions occur.
+    /// - Parameters:
+    ///   - peers: Array of tuples (id, nickname, isConnected).
+    ///   - selfNickname: The local user's current nickname, included in collision counts to suffix remotes matching it.
+    /// - Returns: Map of peerID -> displayName.
+    static func resolve(_ peers: [(id: String, nickname: String, isConnected: Bool)], selfNickname: String) -> [String: String] {
+        // Count collisions among connected peers and include our own nickname
+        var counts: [String: Int] = [:]
+        for p in peers where p.isConnected {
+            counts[p.nickname, default: 0] += 1
+        }
+        counts[selfNickname, default: 0] += 1
+
+        var result: [String: String] = [:]
+        for p in peers {
+            var name = p.nickname
+            if p.isConnected, (counts[p.nickname] ?? 0) > 1 {
+                name += "#" + String(p.id.prefix(4))
+            }
+            result[p.id] = name
+        }
+        return result
+    }
+}
+

bitchat/Views/ContentView.swift

@@ -13,19 +13,9 @@ import UIKit
 
 // MARK: - Supporting Types
 
-// Pre-computed peer data for performance
+//
-struct PeerDisplayData: Identifiable {
-    let id: String
-    let displayName: String
-    let isFavorite: Bool
-    let isMe: Bool
-    let hasUnreadMessages: Bool
-    let encryptionStatus: EncryptionStatus
-    let connectionState: BitchatPeer.ConnectionState
-    let isMutualFavorite: Bool
-}
 
-// (Link previews removed; URLs are now clickable inline)
+//
 
 // MARK: - Main Content View
 
@@ -33,9 +23,8 @@ struct ContentView: View {
     // MARK: - Properties
     
     @EnvironmentObject var viewModel: ChatViewModel
-    #if os(iOS)
     @ObservedObject private var locationManager = LocationChannelManager.shared
-    #endif
+    @ObservedObject private var bookmarks = GeohashBookmarksStore.shared
     @State private var messageText = ""
     @State private var textFieldSelection: NSRange? = nil
     @FocusState private var isTextFieldFocused: Bool
@@ -58,6 +47,7 @@ struct ContentView: View {
     @State private var scrollThrottleTimer: Timer?
     @State private var autocompleteDebounceTimer: Timer?
     @State private var showLocationChannelsSheet = false
+    @State private var showVerifySheet = false
     @State private var expandedMessageIDs: Set<String> = []
     // Window sizes for rendering (infinite scroll up)
     @State private var windowCountPublic: Int = 300
@@ -111,14 +101,14 @@ struct ContentView: View {
                                 .onEnded { value in
                                     let translation = value.translation.width.isNaN ? 0 : value.translation.width
                                     let velocity = value.velocity.width.isNaN ? 0 : value.velocity.width
-                                    if translation > 50 || (translation > 30 && velocity > 300) {
+                                    if translation > TransportConfig.uiBackSwipeTranslationLarge || (translation > TransportConfig.uiBackSwipeTranslationSmall && velocity > TransportConfig.uiBackSwipeVelocityThreshold) {
-                                        withAnimation(.easeOut(duration: 0.2)) {
+                                        withAnimation(.easeOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
                                             showPrivateChat = false
                                             backSwipeOffset = 0
                                             viewModel.endPrivateChat()
                                         }
                                     } else {
-                                        withAnimation(.easeOut(duration: 0.15)) {
+                                        withAnimation(.easeOut(duration: TransportConfig.uiAnimationShortSeconds)) {
                                             backSwipeOffset = 0
                                         }
                                     }
@@ -132,7 +122,7 @@ struct ContentView: View {
                     Color.clear
                         .contentShape(Rectangle())
                         .onTapGesture {
-                            withAnimation(.easeInOut(duration: 0.2)) {
+            withAnimation(.easeInOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
                                 showSidebar = false
                                 sidebarDragOffset = 0
                             }
@@ -162,14 +152,14 @@ struct ContentView: View {
                     let width = geometry.size.width.isNaN ? 0 : max(0, geometry.size.width)
                     return showSidebar ? -dragOffset : width - dragOffset
                 }())
-                .animation(.easeInOut(duration: 0.25), value: showSidebar)
+                .animation(.easeInOut(duration: TransportConfig.uiAnimationSidebarSeconds), value: showSidebar)
             }
         }
         #if os(macOS)
         .frame(minWidth: 600, minHeight: 400)
         #endif
         .onChange(of: viewModel.selectedPrivateChatPeer) { newValue in
-            withAnimation(.easeInOut(duration: 0.2)) {
+            withAnimation(.easeInOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
                 showPrivateChat = newValue != nil
             }
         }
@@ -199,7 +189,6 @@ struct ContentView: View {
 
             Button("direct message") {
                 if let peerID = selectedMessageSenderID {
-                    #if os(iOS)
                     if peerID.hasPrefix("nostr:") {
                         if let full = viewModel.fullNostrHex(forSenderPeerID: peerID) {
                             viewModel.startGeohashDM(withPubkeyHex: full)
@@ -207,10 +196,7 @@ struct ContentView: View {
                     } else {
                         viewModel.startPrivateChat(with: peerID)
                     }
-                    #else
+                    withAnimation(.easeInOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
-                    viewModel.startPrivateChat(with: peerID)
-                    #endif
-                    withAnimation(.easeInOut(duration: 0.2)) {
                         showSidebar = false
                         sidebarDragOffset = 0
                     }
@@ -231,7 +217,6 @@ struct ContentView: View {
             
             Button("BLOCK", role: .destructive) {
                 // Prefer direct geohash block when we have a Nostr sender ID
-                #if os(iOS)
                 if let peerID = selectedMessageSenderID, peerID.hasPrefix("nostr:"),
                    let full = viewModel.fullNostrHex(forSenderPeerID: peerID),
                    let sender = selectedMessageSender {
@@ -239,9 +224,6 @@ struct ContentView: View {
                 } else if let sender = selectedMessageSender {
                     viewModel.sendMessage("/block \(sender)")
                 }
-                #else
-                if let sender = selectedMessageSender { viewModel.sendMessage("/block \(sender)") }
-                #endif
             }
             
             Button("cancel", role: .cancel) {}
@@ -283,13 +265,12 @@ struct ContentView: View {
                     
                     // Implement windowing with adjustable window count per chat
                     let currentWindowCount: Int = {
-                        if let peer = privatePeer { return windowCountPrivate[peer] ?? 300 }
+                        if let peer = privatePeer { return windowCountPrivate[peer] ?? TransportConfig.uiWindowInitialCountPrivate }
                         return windowCountPublic
                     }()
                     let windowedMessages = messages.suffix(currentWindowCount)
 
                     // Build stable UI IDs with a context key to avoid ID collisions when switching channels
-                    #if os(iOS)
                     let contextKey: String = {
                         if let peer = privatePeer { return "dm:\(peer)" }
                         switch locationManager.selectedChannel {
@@ -297,12 +278,6 @@ struct ContentView: View {
                         case .location(let ch): return "geo:\(ch.geohash)"
                         }
                     }()
-                    #else
-                    let contextKey: String = {
-                        if let peer = privatePeer { return "dm:\(peer)" }
-                        return "mesh"
-                    }()
-                    #endif
                     let items = windowedMessages.map { (uiID: "\(contextKey)|\($0.id)", message: $0) }
                     
                     ForEach(items, id: \.uiID) { item in
@@ -322,11 +297,11 @@ struct ContentView: View {
                                     let cashuTokens = message.content.extractCashuTokens()
                                     let lightningLinks = message.content.extractLightningLinks()
                                     HStack(alignment: .top, spacing: 0) {
-                                        let isLong = (message.content.count > 2000 || message.content.hasVeryLongToken(threshold: 512)) && cashuTokens.isEmpty
+                                        let isLong = (message.content.count > TransportConfig.uiLongMessageLengthThreshold || message.content.hasVeryLongToken(threshold: TransportConfig.uiVeryLongTokenThreshold)) && cashuTokens.isEmpty
                                         let isExpanded = expandedMessageIDs.contains(message.id)
                                         Text(viewModel.formatMessageAsText(message, colorScheme: colorScheme))
                                             .fixedSize(horizontal: false, vertical: true)
-                                            .lineLimit(isLong && !isExpanded ? 30 : nil)
+                                            .lineLimit(isLong && !isExpanded ? TransportConfig.uiLongMessageLineLimit : nil)
                                             .frame(maxWidth: .infinity, alignment: .leading)
                                         
                                         // Delivery status indicator for private messages
@@ -338,7 +313,7 @@ struct ContentView: View {
                                     }
                                     
                                     // Expand/Collapse for very long messages
-                                    if (message.content.count > 2000 || message.content.hasVeryLongToken(threshold: 512)) && cashuTokens.isEmpty {
+                                    if (message.content.count > TransportConfig.uiLongMessageLengthThreshold || message.content.hasVeryLongToken(threshold: TransportConfig.uiVeryLongTokenThreshold)) && cashuTokens.isEmpty {
                                         let isExpanded = expandedMessageIDs.contains(message.id)
                                         Button(isExpanded ? "show less" : "show more") {
                                             if isExpanded { expandedMessageIDs.remove(message.id) }
@@ -397,8 +372,7 @@ struct ContentView: View {
                             }
                             // Infinite scroll up: when top row appears, increase window and preserve anchor
                             if message.id == windowedMessages.first?.id, messages.count > windowedMessages.count {
-                                let step = 200
+                                let step = TransportConfig.uiWindowStepCount
-                                #if os(iOS)
                                 let contextKey: String = {
                                     if let peer = privatePeer { return "dm:\(peer)" }
                                     switch locationManager.selectedChannel {
@@ -406,15 +380,9 @@ struct ContentView: View {
                                     case .location(let ch): return "geo:\(ch.geohash)"
                                     }
                                 }()
-                                #else
-                                let contextKey: String = {
-                                    if let peer = privatePeer { return "dm:\(peer)" }
-                                    return "mesh"
-                                }()
-                                #endif
                                 let preserveID = "\(contextKey)|\(message.id)"
                                 if let peer = privatePeer {
-                                    let current = windowCountPrivate[peer] ?? 300
+                                    let current = windowCountPrivate[peer] ?? TransportConfig.uiWindowInitialCountPrivate
                                     let newCount = min(messages.count, current + step)
                                     if newCount != current {
                                         windowCountPrivate[peer] = newCount
@@ -480,7 +448,6 @@ struct ContentView: View {
                 let gh = url.path.trimmingCharacters(in: CharacterSet(charactersIn: "/")).lowercased()
                 let allowed = Set("0123456789bcdefghjkmnpqrstuvwxyz")
                 guard (2...12).contains(gh.count), gh.allSatisfy({ allowed.contains($0) }) else { return }
-                #if os(iOS)
                 func levelForLength(_ len: Int) -> GeohashChannelLevel {
                     switch len {
                     case 0...2: return .region
@@ -493,9 +460,14 @@ struct ContentView: View {
                 }
                 let level = levelForLength(gh.count)
                 let ch = GeohashChannel(level: level, geohash: gh)
-                LocationChannelManager.shared.markTeleported(for: gh, true)
+                // Do not mark teleported when opening a geohash that is in our regional set.
+                // If availableChannels is empty (e.g., cold start), defer marking and let
+                // LocationChannelManager compute teleported based on actual location.
+                let inRegional = LocationChannelManager.shared.availableChannels.contains { $0.geohash == gh }
+                if !inRegional && !LocationChannelManager.shared.availableChannels.isEmpty {
+                    LocationChannelManager.shared.markTeleported(for: gh, true)
+                }
                 LocationChannelManager.shared.select(ChannelID.location(ch))
-                #endif
             }
             .onTapGesture(count: 3) {
                 // Triple-tap to clear current chat
@@ -508,16 +480,12 @@ struct ContentView: View {
                        let last = viewModel.getPrivateChatMessages(for: peer).suffix(300).last?.id {
                         return "dm:\(peer)|\(last)"
                     }
-                    #if os(iOS)
                     let contextKey: String = {
                         switch locationManager.selectedChannel {
                         case .mesh: return "mesh"
                         case .location(let ch): return "geo:\(ch.geohash)"
                         }
                     }()
-                    #else
-                    let contextKey: String = "mesh"
-                    #endif
                     if let last = viewModel.messages.suffix(300).last?.id { return "\(contextKey)|\(last)" }
                     return nil
                 }()
@@ -532,16 +500,12 @@ struct ContentView: View {
                            let last = viewModel.getPrivateChatMessages(for: peer).suffix(300).last?.id {
                             return "dm:\(peer)|\(last)"
                         }
-                        #if os(iOS)
                         let contextKey: String = {
                             switch locationManager.selectedChannel {
                             case .mesh: return "mesh"
                             case .location(let ch): return "geo:\(ch.geohash)"
                             }
                         }()
-                        #else
-                        let contextKey: String = "mesh"
-                        #endif
                         if let last = viewModel.messages.suffix(300).last?.id { return "\(contextKey)|\(last)" }
                         return nil
                     }()
@@ -555,16 +519,12 @@ struct ContentView: View {
                        let last = viewModel.getPrivateChatMessages(for: peer).suffix(300).last?.id {
                         return "dm:\(peer)|\(last)"
                     }
-                    #if os(iOS)
                     let contextKey: String = {
                         switch locationManager.selectedChannel {
                         case .mesh: return "mesh"
                         case .location(let ch): return "geo:\(ch.geohash)"
                         }
                     }()
-                    #else
-                    let contextKey: String = "mesh"
-                    #endif
                     if let last = viewModel.messages.suffix(300).last?.id { return "\(contextKey)|\(last)" }
                     return nil
                 }()
@@ -587,19 +547,15 @@ struct ContentView: View {
                     }
                     // Throttle scroll animations to prevent excessive UI updates
                     let now = Date()
-                    if now.timeIntervalSince(lastScrollTime) > 0.5 {
+                    if now.timeIntervalSince(lastScrollTime) > TransportConfig.uiScrollThrottleSeconds {
                         // Immediate scroll if enough time has passed
                         lastScrollTime = now
-                        #if os(iOS)
                         let contextKey: String = {
                             switch locationManager.selectedChannel {
                             case .mesh: return "mesh"
                             case .location(let ch): return "geo:\(ch.geohash)"
                             }
                         }()
-                        #else
-                        let contextKey: String = "mesh"
-                        #endif
                         let count = windowCountPublic
                         let target = viewModel.messages.suffix(count).last.map { "\(contextKey)|\($0.id)" }
                         DispatchQueue.main.async {
@@ -608,18 +564,14 @@ struct ContentView: View {
                     } else {
                         // Schedule a delayed scroll
                         scrollThrottleTimer?.invalidate()
-                        scrollThrottleTimer = Timer.scheduledTimer(withTimeInterval: 0.5, repeats: false) { _ in
+                        scrollThrottleTimer = Timer.scheduledTimer(withTimeInterval: TransportConfig.uiScrollThrottleSeconds, repeats: false) { _ in
                             lastScrollTime = Date()
-                            #if os(iOS)
+                        let contextKey: String = {
-                            let contextKey: String = {
+                            switch locationManager.selectedChannel {
-                                switch locationManager.selectedChannel {
+                            case .mesh: return "mesh"
-                                case .mesh: return "mesh"
+                            case .location(let ch): return "geo:\(ch.geohash)"
-                                case .location(let ch): return "geo:\(ch.geohash)"
+                            }
-                                }
+                        }()
-                            }()
-                            #else
-                            let contextKey: String = "mesh"
-                            #endif
                             let count = windowCountPublic
                             let target = viewModel.messages.suffix(count).last.map { "\(contextKey)|\($0.id)" }
                             DispatchQueue.main.async {
@@ -644,7 +596,7 @@ struct ContentView: View {
                     }
                     // Same throttling for private chats
                     let now = Date()
-                    if now.timeIntervalSince(lastScrollTime) > 0.5 {
+                    if now.timeIntervalSince(lastScrollTime) > TransportConfig.uiScrollThrottleSeconds {
                         lastScrollTime = now
                         let contextKey = "dm:\(peerID)"
                         let count = windowCountPrivate[peerID] ?? 300
@@ -654,7 +606,7 @@ struct ContentView: View {
                         }
                     } else {
                         scrollThrottleTimer?.invalidate()
-                        scrollThrottleTimer = Timer.scheduledTimer(withTimeInterval: 0.5, repeats: false) { _ in
+                        scrollThrottleTimer = Timer.scheduledTimer(withTimeInterval: TransportConfig.uiScrollThrottleSeconds, repeats: false) { _ in
                             lastScrollTime = Date()
                             let contextKey = "dm:\(peerID)"
                             let count = windowCountPrivate[peerID] ?? 300
@@ -666,7 +618,6 @@ struct ContentView: View {
                     }
                 }
             }
-            #if os(iOS)
             .onChange(of: locationManager.selectedChannel) { newChannel in
                 // When switching to a new geohash channel, scroll to the bottom
                 guard privatePeer == nil else { return }
@@ -675,7 +626,7 @@ struct ContentView: View {
                     break
                 case .location(let ch):
                     // Reset window size
-                    windowCountPublic = 300
+                    windowCountPublic = TransportConfig.uiWindowInitialCountPublic
                     let contextKey = "geo:\(ch.geohash)"
                     let last = viewModel.messages.suffix(windowCountPublic).last?.id
                     let target = last.map { "\(contextKey)|\($0)" }
@@ -685,18 +636,17 @@ struct ContentView: View {
                     }
                 }
             }
-            #endif
             .onAppear {
                 // Also check when view appears
                 if let peerID = privatePeer {
                     // Try multiple times to ensure read receipts are sent
                     viewModel.markPrivateMessagesAsRead(from: peerID)
                     
-                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+                    DispatchQueue.main.asyncAfter(deadline: .now() + TransportConfig.uiReadReceiptRetryShortSeconds) {
                         viewModel.markPrivateMessagesAsRead(from: peerID)
                     }
                     
-                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                    DispatchQueue.main.asyncAfter(deadline: .now() + TransportConfig.uiReadReceiptRetryLongSeconds) {
                         viewModel.markPrivateMessagesAsRead(from: peerID)
                     }
                 }
@@ -755,18 +705,22 @@ struct ContentView: View {
             if showCommandSuggestions && !commandSuggestions.isEmpty {
                 VStack(alignment: .leading, spacing: 0) {
                     // Define commands with aliases and syntax
-                    let commandInfo: [(commands: [String], syntax: String?, description: String)] = [
+                    let baseInfo: [(commands: [String], syntax: String?, description: String)] = [
                         (["/block"], "[nickname]", "block or list blocked peers"),
                         (["/clear"], nil, "clear chat messages"),
-                        (["/fav"], "<nickname>", "add to favorites"),
-                        (["/help"], nil, "show this help"),
                         (["/hug"], "<nickname>", "send someone a warm hug"),
                         (["/m", "/msg"], "<nickname> [message]", "send private message"),
                         (["/slap"], "<nickname>", "slap someone with a trout"),
                         (["/unblock"], "<nickname>", "unblock a peer"),
-                        (["/unfav"], "<nickname>", "remove from favorites"),
                         (["/w"], nil, "see who's online")
                     ]
+                    let isGeoPublic: Bool = { if case .location = locationManager.selectedChannel { return true }; return false }()
+                    let isGeoDM: Bool = (viewModel.selectedPrivateChatPeer?.hasPrefix("nostr_") == true)
+                    let favInfo: [(commands: [String], syntax: String?, description: String)] = [
+                        (["/fav"], "<nickname>", "add to favorites"),
+                        (["/unfav"], "<nickname>", "remove from favorites")
+                    ]
+                    let commandInfo = baseInfo + ((isGeoPublic || isGeoDM) ? [] : favInfo)
                     
                     // Build the display
                     let allCommands = commandInfo
@@ -841,18 +795,25 @@ struct ContentView: View {
                     // Check for command autocomplete (instant, no debounce needed)
                     if newValue.hasPrefix("/") && newValue.count >= 1 {
                         // Build context-aware command list
-                        let commandDescriptions = [
+                        let isGeoPublic: Bool = {
+                            if case .location = locationManager.selectedChannel { return true }
+                            return false
+                        }()
+                        let isGeoDM: Bool = (viewModel.selectedPrivateChatPeer?.hasPrefix("nostr_") == true)
+                        var commandDescriptions = [
                             ("/block", "block or list blocked peers"),
                             ("/clear", "clear chat messages"),
-                            ("/fav", "add to favorites"),
-                            ("/help", "show this help"),
                             ("/hug", "send someone a warm hug"),
                             ("/m", "send private message"),
                             ("/slap", "slap someone with a trout"),
                             ("/unblock", "unblock a peer"),
-                            ("/unfav", "remove from favorites"),
                             ("/w", "see who's online")
                         ]
+                        // Only show favorites commands when not in geohash context
+                        if !(isGeoPublic || isGeoDM) {
+                            commandDescriptions.append(("/fav", "add to favorites"))
+                            commandDescriptions.append(("/unfav", "remove from favorites"))
+                        }
                         
                         let input = newValue.lowercased()
                         
@@ -905,7 +866,7 @@ struct ContentView: View {
         }
         .onAppear {
             // Delay keyboard focus to avoid iOS constraint warnings
-            DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+            DispatchQueue.main.asyncAfter(deadline: .now() + TransportConfig.uiReadReceiptRetryShortSeconds) {
                 isTextFieldFocused = true
             }
         }
@@ -934,6 +895,15 @@ struct ContentView: View {
                         .font(.system(size: 16, weight: .bold, design: .monospaced))
                         .foregroundColor(textColor)
                     Spacer()
+                    // Show QR in mesh on all platforms
+                    if case .mesh = locationManager.selectedChannel {
+                        Button(action: { showVerifySheet = true }) {
+                            Image(systemName: "qrcode")
+                                .font(.system(size: 14))
+                        }
+                        .buttonStyle(.plain)
+                        .help("Verification: show my QR or scan a friend")
+                    }
                 }
                 .frame(height: 44) // Match header height
                 .padding(.horizontal, 12)
@@ -946,53 +916,34 @@ struct ContentView: View {
                 VStack(alignment: .leading, spacing: 6) {
                     // People section
                     VStack(alignment: .leading, spacing: 4) {
-                        #if os(iOS)
+                if case .location = locationManager.selectedChannel {
-                        if case .location = locationManager.selectedChannel {
+                    GeohashPeopleList(viewModel: viewModel,
-                            GeohashPeopleList(viewModel: viewModel,
+                                      textColor: textColor,
-                                              textColor: textColor,
+                                      secondaryTextColor: secondaryTextColor,
-                                              secondaryTextColor: secondaryTextColor,
+                                      onTapPerson: {
-                                              onTapPerson: {
+                                          withAnimation(.easeInOut(duration: 0.2)) {
-                                                  withAnimation(.easeInOut(duration: 0.2)) {
+                                              showSidebar = false
-                                                      showSidebar = false
+                                              sidebarDragOffset = 0
-                                                      sidebarDragOffset = 0
+                                          }
-                                                  }
+                                      })
-                                              })
+                } else {
-                        } else {
+                    MeshPeerList(viewModel: viewModel,
-                            MeshPeerList(viewModel: viewModel,
+                                 textColor: textColor,
-                                         textColor: textColor,
+                                 secondaryTextColor: secondaryTextColor,
-                                         secondaryTextColor: secondaryTextColor,
+                                 onTapPeer: { peerID in
-                                         onTapPeer: { peerID in
+                                     viewModel.startPrivateChat(with: peerID)
-                                             viewModel.startPrivateChat(with: peerID)
+                                     withAnimation(.easeInOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
-                                             withAnimation(.easeInOut(duration: 0.2)) {
+                                         showSidebar = false
-                                                 showSidebar = false
+                                         sidebarDragOffset = 0
-                                                 sidebarDragOffset = 0
+                                     }
-                                             }
+                                 },
-                                         },
+                                 onToggleFavorite: { peerID in
-                                         onToggleFavorite: { peerID in
+                                     viewModel.toggleFavorite(peerID: peerID)
-                                             viewModel.toggleFavorite(peerID: peerID)
+                                 },
-                                         },
+                                 onShowFingerprint: { peerID in
-                                         onShowFingerprint: { peerID in
+                                     viewModel.showFingerprint(for: peerID)
-                                             viewModel.showFingerprint(for: peerID)
+                                 })
-                                         })
+                }
-                        }
-                        #else
-                        MeshPeerList(viewModel: viewModel,
-                                     textColor: textColor,
-                                     secondaryTextColor: secondaryTextColor,
-                                     onTapPeer: { peerID in
-                                         viewModel.startPrivateChat(with: peerID)
-                                         withAnimation(.easeInOut(duration: 0.2)) {
-                                             showSidebar = false
-                                             sidebarDragOffset = 0
-                                         }
-                                     },
-                                     onToggleFavorite: { peerID in
-                                         viewModel.toggleFavorite(peerID: peerID)
-                                     },
-                                     onShowFingerprint: { peerID in
-                                         viewModel.showFingerprint(for: peerID)
-                                     })
-                        #endif
                     }
                 }
                 .id(viewModel.allPeers.map { "\($0.id)-\($0.isConnected)" }.joined())
@@ -1029,7 +980,7 @@ struct ContentView: View {
                 .onEnded { value in
                     let translation = value.translation.width.isNaN ? 0 : value.translation.width
                     let velocity = value.velocity.width.isNaN ? 0 : value.velocity.width
-                    withAnimation(.easeOut(duration: 0.2)) {
+                    withAnimation(.easeOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
                         if !showSidebar {
                             if translation < -100 || (translation < -50 && velocity < -500) {
                                 showSidebar = true
@@ -1082,29 +1033,24 @@ struct ContentView: View {
         return (name, "")
     }
     
-    #if os(iOS)
+    // Compute channel-aware people count and color for toolbar (cross-platform)
-    // Compute channel-aware people count and color for toolbar
     private func channelPeopleCountAndColor() -> (Int, Color) {
         switch locationManager.selectedChannel {
         case .location:
             let n = viewModel.geohashPeople.count
-            // Use standard green (dark: system green; light: custom darker green)
             let standardGreen = (colorScheme == .dark) ? Color.green : Color(red: 0, green: 0.5, blue: 0)
             return (n, n > 0 ? standardGreen : Color.secondary)
         case .mesh:
             let counts = viewModel.allPeers.reduce(into: (others: 0, mesh: 0)) { counts, peer in
                 guard peer.id != viewModel.meshService.myPeerID else { return }
-                let isMeshConnected = peer.isConnected
+                if peer.isConnected { counts.mesh += 1; counts.others += 1 }
-                if isMeshConnected { counts.mesh += 1; counts.others += 1 }
+                else if peer.isReachable { counts.others += 1 }
-                else if peer.isMutualFavorite { counts.others += 1 }
             }
-            // Darker, more neutral blue (less purple hue)
             let meshBlue = Color(hue: 0.60, saturation: 0.85, brightness: 0.82)
             let color: Color = counts.mesh > 0 ? meshBlue : Color.secondary
             return (counts.others, color)
         }
     }
-    #endif
 
     
     private var mainHeaderView: some View {
@@ -1151,7 +1097,6 @@ struct ContentView: View {
             
             // Channel badge + dynamic spacing + people counter
             // Precompute header count and color outside the ViewBuilder expressions
-            #if os(iOS)
             let cc = channelPeopleCountAndColor()
             let headerCountColor: Color = cc.1
             let headerOtherPeersCount: Int = {
@@ -1160,24 +1105,11 @@ struct ContentView: View {
                 }
                 return cc.0
             }()
-            #else
-            let peerCounts = viewModel.allPeers.reduce(into: (others: 0, mesh: 0)) { counts, peer in
-                guard peer.id != viewModel.meshService.myPeerID else { return }
-                let isMeshConnected = peer.isConnected
-                if isMeshConnected { counts.mesh += 1; counts.others += 1 }
-                else if peer.isMutualFavorite { counts.others += 1 }
-            }
-            let headerOtherPeersCount = peerCounts.others
-            // Darker, more neutral blue (less purple hue)
-            let meshBlue = Color(hue: 0.60, saturation: 0.85, brightness: 0.82)
-            let headerCountColor: Color = (peerCounts.mesh > 0) ? meshBlue : Color.secondary
-            #endif
 
             HStack(spacing: 10) {
                 // Unread icon immediately to the left of the channel badge (independent from channel button)
                 
-                // Unread indicator
+                // Unread indicator (now shown on iOS and macOS)
-                #if os(iOS)
                 if viewModel.hasAnyUnreadMessages {
                     Button(action: { viewModel.openMostRelevantPrivateChat() }) {
                         Image(systemName: "envelope.fill")
@@ -1187,6 +1119,15 @@ struct ContentView: View {
                     .buttonStyle(.plain)
                     .accessibilityLabel("Open unread private chat")
                 }
+                // Bookmark toggle for current geohash (not shown for mesh)
+                if case .location(let ch) = locationManager.selectedChannel {
+                    Button(action: { GeohashBookmarksStore.shared.toggle(ch.geohash) }) {
+                        Image(systemName: GeohashBookmarksStore.shared.isBookmarked(ch.geohash) ? "bookmark.fill" : "bookmark")
+                            .font(.system(size: 12))
+                    }
+                    .buttonStyle(.plain)
+                    .accessibilityLabel("Toggle bookmark for #\(ch.geohash)")
+                }
                 // Location channels button '#'
                 Button(action: { showLocationChannelsSheet = true }) {
                     let badgeText: String = {
@@ -1212,7 +1153,6 @@ struct ContentView: View {
                         .accessibilityLabel("location channels")
                 }
                 .buttonStyle(.plain)
-                #endif
 
                 HStack(spacing: 4) {
                     // People icon with count
@@ -1224,21 +1164,25 @@ struct ContentView: View {
                         .accessibilityHidden(true)
                 }
                 .foregroundColor(headerCountColor)
+
+                // QR moved to the PEOPLE header in the sidebar when on mesh channel
             }
             .onTapGesture {
-                withAnimation(.easeInOut(duration: 0.2)) {
+                withAnimation(.easeInOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
                     showSidebar.toggle()
                     sidebarDragOffset = 0
                 }
             }
+            .sheet(isPresented: $showVerifySheet) {
+                VerificationSheetView(isPresented: $showVerifySheet)
+                    .environmentObject(viewModel)
+            }
         }
         .frame(height: 44)
         .padding(.horizontal, 12)
-        #if os(iOS)
         .sheet(isPresented: $showLocationChannelsSheet) {
             LocationChannelsSheet(isPresented: $showLocationChannelsSheet)
         }
-        #endif
         .background(backgroundColor.opacity(0.95))
     }
     
@@ -1252,20 +1196,11 @@ struct ContentView: View {
     
     @ViewBuilder
     private func privateHeaderContent(for privatePeerID: String) -> some View {
-        // Prefer short (mesh) ID when mesh-connected (radio). Only use full Noise key when not connected (globe).
+        // Prefer short (mesh) ID whenever available for encryption/session status; keep stable key for display resolution only.
         let headerPeerID: String = {
-            if privatePeerID.count == 16 {
+            if privatePeerID.count == 64 {
-                let isMeshConnected = viewModel.meshService.isPeerConnected(privatePeerID) || viewModel.connectedPeers.contains(privatePeerID)
+                // Map stable Noise key to short ID if we know it (even if not directly connected)
-                if !isMeshConnected, let stable = viewModel.getNoiseKeyForShortID(privatePeerID) {
+                if let short = viewModel.getShortIDForNoiseKey(privatePeerID) { return short }
-                    return stable
-                }
-            } else if privatePeerID.count == 64 {
-                // If we have a full Noise key and a corresponding short ID is currently mesh-connected, prefer short ID
-                if let short = viewModel.getShortIDForNoiseKey(privatePeerID) {
-                    if viewModel.meshService.isPeerConnected(short) || viewModel.connectedPeers.contains(short) {
-                        return short
-                    }
-                }
             }
             return privatePeerID
         }()
@@ -1274,18 +1209,35 @@ struct ContentView: View {
         let peer = viewModel.getPeer(byID: headerPeerID)
         let privatePeerNick: String = {
             if privatePeerID.hasPrefix("nostr_") {
-                #if os(iOS)
                 // Build geohash DM header: "#<ghash>/@name#abcd"
                 if case .location(let ch) = locationManager.selectedChannel {
                     let disp = viewModel.geohashDisplayName(for: privatePeerID)
                     return "#\(ch.geohash)/@\(disp)"
                 }
-                #endif
             }
-            return peer?.displayName ?? 
+            // Try mesh/unified peer display
-                   viewModel.meshService.peerNickname(peerID: headerPeerID) ??
+            if let name = peer?.displayName { return name }
-                   FavoritesPersistenceService.shared.getFavoriteStatus(for: Data(hexString: headerPeerID) ?? Data())?.peerNickname ?? 
+            // Try direct mesh nickname (connected-only)
-                   "Unknown"
+            if let name = viewModel.meshService.peerNickname(peerID: headerPeerID) { return name }
+            // Try favorite nickname by stable Noise key
+            if let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: Data(hexString: headerPeerID) ?? Data()),
+               !fav.peerNickname.isEmpty { return fav.peerNickname }
+            // Fallback: resolve from persisted social identity via fingerprint mapping
+            if headerPeerID.count == 16 {
+                let candidates = SecureIdentityStateManager.shared.getCryptoIdentitiesByPeerIDPrefix(headerPeerID)
+                if let id = candidates.first,
+                   let social = SecureIdentityStateManager.shared.getSocialIdentity(for: id.fingerprint) {
+                    if let pet = social.localPetname, !pet.isEmpty { return pet }
+                    if !social.claimedNickname.isEmpty { return social.claimedNickname }
+                }
+            } else if headerPeerID.count == 64, let keyData = Data(hexString: headerPeerID) {
+                let fp = keyData.sha256Fingerprint()
+                if let social = SecureIdentityStateManager.shared.getSocialIdentity(for: fp) {
+                    if let pet = social.localPetname, !pet.isEmpty { return pet }
+                    if !social.claimedNickname.isEmpty { return social.claimedNickname }
+                }
+            }
+            return "Unknown"
         }()
         let isNostrAvailable: Bool = {
             guard let connectionState = peer?.connectionState else { 
@@ -1320,6 +1272,12 @@ struct ContentView: View {
                                         .font(.system(size: 14))
                                         .foregroundColor(textColor)
                                         .accessibilityLabel("Connected via mesh")
+                                case .meshReachable:
+                                    // point.3 filled icon for reachable via mesh (not directly connected)
+                                    Image(systemName: "point.3.filled.connected.trianglepath.dotted")
+                                        .font(.system(size: 14))
+                                        .foregroundColor(textColor)
+                                        .accessibilityLabel("Reachable via mesh")
                                 case .nostrAvailable:
                                     // Purple globe for Nostr
                                     Image(systemName: "globe")
@@ -1330,6 +1288,12 @@ struct ContentView: View {
                                     // Should not happen for PM header, but handle gracefully
                                     EmptyView()
                                 }
+                            } else if viewModel.meshService.isPeerReachable(headerPeerID) {
+                                // Fallback: reachable via mesh but not in current peer list
+                                Image(systemName: "point.3.filled.connected.trianglepath.dotted")
+                                    .font(.system(size: 14))
+                                    .foregroundColor(textColor)
+                                    .accessibilityLabel("Reachable via mesh")
                             } else if isNostrAvailable {
                                 // Fallback to Nostr if peer not in list but is mutual favorite
                                 Image(systemName: "globe")
@@ -1348,7 +1312,14 @@ struct ContentView: View {
                                 .font(.system(size: 16, weight: .medium, design: .monospaced))
                                 .foregroundColor(textColor)                            // Dynamic encryption status icon (hide for geohash DMs)
                             if !privatePeerID.hasPrefix("nostr_") {
-                                let encryptionStatus = viewModel.getEncryptionStatus(for: headerPeerID)
+                                // Use short peer ID if available for encryption status (sessions keyed by short ID)
+                                let statusPeerID: String = {
+                                    if privatePeerID.count == 64, let short = viewModel.getShortIDForNoiseKey(privatePeerID) {
+                                        return short
+                                    }
+                                    return headerPeerID
+                                }()
+                                let encryptionStatus = viewModel.getEncryptionStatus(for: statusPeerID)
                                 if let icon = encryptionStatus.icon {
                                     Image(systemName: icon)
                                         .font(.system(size: 14))
@@ -1367,7 +1338,7 @@ struct ContentView: View {
                     // Left and right buttons positioned with HStack
                     HStack {
                         Button(action: {
-                            withAnimation(.easeInOut(duration: 0.2)) {
+                            withAnimation(.easeInOut(duration: TransportConfig.uiAnimationMediumSeconds)) {
                                 showPrivateChat = false
                                 viewModel.endPrivateChat()
                             }
@@ -1445,23 +1416,7 @@ private struct PaymentChipView: View {
     }
 }
 
-// Helper view for rendering message content (plain, no hashtag/mention formatting)
+//
-struct MessageContentView: View {
-    let message: BitchatMessage
-    let viewModel: ChatViewModel
-    let colorScheme: ColorScheme
-    let isMentioned: Bool
-    
-    var body: some View {
-        Text(message.content)
-            .font(.system(size: 14, design: .monospaced))
-            .fontWeight(isMentioned ? .bold : .regular)
-    }
-    
-    // MARK: - Helper Methods
-    
-    // buildTextSegments removed: content is rendered plain.
-}
 
 // Delivery status indicator view
 struct DeliveryStatusView: View {

bitchat/Views/FingerprintView.swift

@@ -32,17 +32,36 @@ struct FingerprintView: View {
                 
                 Spacer()
                 
-                Button("DONE") {
+                Button(action: { dismiss() }) {
-                    dismiss()
+                    Image(systemName: "xmark")
+                        .font(.system(size: 14, weight: .semibold))
                 }
                 .foregroundColor(textColor)
             }
             .padding()
             
             VStack(alignment: .leading, spacing: 16) {
-                // Peer info
+                // Prefer short mesh ID for session/encryption status
-                let peerNickname = viewModel.meshService.peerNickname(peerID: peerID) ?? "Unknown"
+                let statusPeerID: String = {
-                let encryptionStatus = viewModel.getEncryptionStatus(for: peerID)
+                    if peerID.count == 64, let short = viewModel.getShortIDForNoiseKey(peerID) { return short }
+                    return peerID
+                }()
+                // Resolve a friendly name
+                let peerNickname: String = {
+                    if let p = viewModel.getPeer(byID: statusPeerID) { return p.displayName }
+                    if let name = viewModel.meshService.peerNickname(peerID: statusPeerID) { return name }
+                    if peerID.count == 64, let data = Data(hexString: peerID) {
+                        if let fav = FavoritesPersistenceService.shared.getFavoriteStatus(for: data), !fav.peerNickname.isEmpty { return fav.peerNickname }
+                        let fp = data.sha256Fingerprint()
+                        if let social = SecureIdentityStateManager.shared.getSocialIdentity(for: fp) {
+                            if let pet = social.localPetname, !pet.isEmpty { return pet }
+                            if !social.claimedNickname.isEmpty { return social.claimedNickname }
+                        }
+                    }
+                    return "Unknown"
+                }()
+                // Accurate encryption state based on short ID session
+                let encryptionStatus = viewModel.getEncryptionStatus(for: statusPeerID)
                 
                 HStack {
                     if let icon = encryptionStatus.icon {
@@ -73,7 +92,7 @@ struct FingerprintView: View {
                         .font(.system(size: 12, weight: .bold, design: .monospaced))
                         .foregroundColor(textColor.opacity(0.7))
                     
-                    if let fingerprint = viewModel.getFingerprint(for: peerID) {
+                    if let fingerprint = viewModel.getFingerprint(for: statusPeerID) {
                         Text(formatFingerprint(fingerprint))
                             .font(.system(size: 14, design: .monospaced))
                             .foregroundColor(textColor)
@@ -165,6 +184,20 @@ struct FingerprintView: View {
                                     .cornerRadius(8)
                             }
                             .buttonStyle(PlainButtonStyle())
+                        } else {
+                            Button(action: {
+                                viewModel.unverifyFingerprint(for: peerID)
+                                dismiss()
+                            }) {
+                                Text("REMOVE VERIFICATION")
+                                    .font(.system(size: 14, weight: .bold, design: .monospaced))
+                                    .foregroundColor(.white)
+                                    .padding(.horizontal, 20)
+                                    .padding(.vertical, 10)
+                                    .background(Color.red)
+                                    .cornerRadius(8)
+                            }
+                            .buttonStyle(PlainButtonStyle())
                         }
                     }
                     .padding(.top)

bitchat/Views/GeohashPeopleList.swift

@@ -1,6 +1,5 @@
 import SwiftUI
 
-#if os(iOS)
 struct GeohashPeopleList: View {
     @ObservedObject var viewModel: ChatViewModel
     let textColor: Color
@@ -29,16 +28,12 @@ struct GeohashPeopleList: View {
             let people = viewModel.visibleGeohashPeople()
             let currentIDs = people.map { $0.id }
 
-            #if os(iOS)
             let teleportedSet = Set(viewModel.teleportedGeo.map { $0.lowercased() })
             let isTeleportedID: (String) -> Bool = { id in
                 if teleportedSet.contains(id.lowercased()) { return true }
                 if let me = myHex, id == me, LocationChannelManager.shared.teleported { return true }
                 return false
             }
-            #else
-            let isTeleportedID: (String) -> Bool = { _ in false }
-            #endif
 
             let displayIDs = orderedIDs.filter { currentIDs.contains($0) } + currentIDs.filter { !orderedIDs.contains($0) }
             let nonTele = displayIDs.filter { !isTeleportedID($0) }
@@ -52,11 +47,7 @@ struct GeohashPeopleList: View {
                     let person = personByID[pid]!
                     HStack(spacing: 4) {
                         let isMe = (person.id == myHex)
-                        #if os(iOS)
                         let teleported = viewModel.teleportedGeo.contains(person.id.lowercased()) || (isMe && LocationChannelManager.shared.teleported)
-                        #else
-                        let teleported = false
-                        #endif
                         let icon = teleported ? "face.dashed" : "mappin.and.ellipse"
                         let assignedColor = viewModel.colorForNostrPubkey(person.id, isDark: colorScheme == .dark)
                         let rowColor: Color = isMe ? .orange : assignedColor
@@ -127,10 +118,8 @@ struct GeohashPeopleList: View {
         }
     }
 }
-#endif
 
 // Helper to split a trailing #abcd suffix
-#if os(iOS)
 private func splitSuffix(from name: String) -> (String, String) {
     guard name.count >= 5 else { return (name, "") }
     let suffix = String(name.suffix(5))
@@ -142,4 +131,3 @@ private func splitSuffix(from name: String) -> (String, String) {
     }
     return (name, "")
 }
-#endif

bitchat/Views/LocationChannelsSheet.swift

@@ -1,10 +1,14 @@
 import SwiftUI
-
+import CoreLocation
 #if os(iOS)
 import UIKit
+#else
+import AppKit
+#endif
 struct LocationChannelsSheet: View {
     @Binding var isPresented: Bool
     @ObservedObject private var manager = LocationChannelManager.shared
+    @ObservedObject private var bookmarks = GeohashBookmarksStore.shared
     @EnvironmentObject var viewModel: ChatViewModel
     @Environment(\.colorScheme) var colorScheme
     @State private var customGeohash: String = ""
@@ -37,11 +41,7 @@ struct LocationChannelsSheet: View {
                             Text("location permission denied. enable in settings to use location channels.")
                                 .font(.system(size: 12, design: .monospaced))
                                 .foregroundColor(.secondary)
-                            Button("open settings") {
+                            Button("open settings") { openSystemLocationSettings() }
-                                if let url = URL(string: UIApplication.openSettingsURLString) {
-                                    UIApplication.shared.open(url)
-                                }
-                            }
                             .buttonStyle(.plain)
                         }
                     case LocationChannelManager.PermissionState.authorized:
@@ -54,6 +54,7 @@ struct LocationChannelsSheet: View {
             }
             .padding(.horizontal, 16)
             .padding(.vertical, 12)
+            #if os(iOS)
             .navigationBarTitleDisplayMode(.inline)
             .toolbar {
                 ToolbarItem(placement: .navigationBarTrailing) {
@@ -61,8 +62,21 @@ struct LocationChannelsSheet: View {
                         .font(.system(size: 14, design: .monospaced))
                 }
             }
+            #else
+            .toolbar {
+                ToolbarItem(placement: .automatic) {
+                    Button("close") { isPresented = false }
+                        .font(.system(size: 14, design: .monospaced))
+                }
+            }
+            #endif
         }
+        #if os(iOS)
         .presentationDetents([.large])
+        #endif
+        #if os(macOS)
+        .frame(minWidth: 420, minHeight: 520)
+        #endif
         .onAppear {
             // Refresh channels when opening
             if manager.permissionState == LocationChannelManager.PermissionState.authorized {
@@ -70,29 +84,22 @@ struct LocationChannelsSheet: View {
             }
             // Begin periodic refresh while sheet is open
             manager.beginLiveRefresh()
-            // Begin multi-channel sampling for counts
+            // Geohash sampling is now managed by ChatViewModel globally
-            let ghs = manager.availableChannels.map { $0.geohash }
-            viewModel.beginGeohashSampling(for: ghs)
         }
         .onDisappear {
             manager.endLiveRefresh()
-            viewModel.endGeohashSampling()
         }
         .onChange(of: manager.permissionState) { newValue in
             if newValue == LocationChannelManager.PermissionState.authorized {
                 manager.refreshChannels()
             }
         }
-        .onChange(of: manager.availableChannels) { newValue in
+        .onChange(of: manager.availableChannels) { _ in }
-            // Keep sampling list in sync with available channels as they refresh live
-            let ghs = newValue.map { $0.geohash }
-            viewModel.beginGeohashSampling(for: ghs)
-        }
     }
 
     private var channelList: some View {
         List {
-            // Mesh option first
+            // Mesh option first (no bookmark)
             channelRow(title: meshTitleWithCount(), subtitlePrefix: "#bluetooth • \(bluetoothRangeString())", isSelected: isMeshSelected, titleColor: standardBlue, titleBold: meshCount() > 0) {
                 manager.select(ChannelID.mesh)
                 isPresented = false
@@ -106,7 +113,21 @@ struct LocationChannelsSheet: View {
                     let namePart = nameBase.map { formattedNamePrefix(for: channel.level) + $0 }
                     let subtitlePrefix = "#\(channel.geohash) • \(coverage)"
                     let highlight = viewModel.geohashParticipantCount(for: channel.geohash) > 0
-                    channelRow(title: geohashTitleWithCount(for: channel), subtitlePrefix: subtitlePrefix, subtitleName: namePart, isSelected: isSelected(channel), titleBold: highlight) {
+                    channelRow(
+                        title: geohashTitleWithCount(for: channel),
+                        subtitlePrefix: subtitlePrefix,
+                        subtitleName: namePart,
+                        isSelected: isSelected(channel),
+                        titleBold: highlight,
+                        trailingAccessory: {
+                            Button(action: { bookmarks.toggle(channel.geohash) }) {
+                                Image(systemName: bookmarks.isBookmarked(channel.geohash) ? "bookmark.fill" : "bookmark")
+                                    .font(.system(size: 14))
+                            }
+                            .buttonStyle(.plain)
+                            .padding(.leading, 8)
+                        }
+                    ) {
                         // Selecting a suggested nearby channel is not a teleport. Persist this.
                         manager.markTeleported(for: channel.geohash, false)
                         manager.select(ChannelID.location(channel))
@@ -128,10 +149,12 @@ struct LocationChannelsSheet: View {
                         .font(.system(size: 14, design: .monospaced))
                         .foregroundColor(.secondary)
                     TextField("geohash", text: $customGeohash)
+                        #if os(iOS)
                         .textInputAutocapitalization(.never)
                         .autocorrectionDisabled(true)
-                        .font(.system(size: 14, design: .monospaced))
                         .keyboardType(.asciiCapable)
+                        #endif
+                        .font(.system(size: 14, design: .monospaced))
                         .onChange(of: customGeohash) { newValue in
                             // Allow only geohash base32 characters, strip '#', limit length
                             let allowed = Set("0123456789bcdefghjkmnpqrstuvwxyz")
@@ -180,12 +203,52 @@ struct LocationChannelsSheet: View {
                 }
             }
 
+            // Bookmarked geohashes
+            if !bookmarks.bookmarks.isEmpty {
+                VStack(alignment: .leading, spacing: 6) {
+                    Text("bookmarked")
+                        .font(.system(size: 12, design: .monospaced))
+                        .foregroundColor(.secondary)
+                }
+                .listRowSeparator(.hidden)
+                ForEach(bookmarks.bookmarks, id: \.self) { gh in
+                    let level = levelForLength(gh.count)
+                    let channel = GeohashChannel(level: level, geohash: gh)
+                    let coverage = coverageString(forPrecision: gh.count)
+                    let subtitle = "#\(gh) • \(coverage)"
+                    let name = bookmarks.bookmarkNames[gh]
+                    channelRow(
+                        title: geohashHashTitleWithCount(gh),
+                        subtitlePrefix: subtitle,
+                        subtitleName: name.map { formattedNamePrefix(for: level) + $0 },
+                        isSelected: isSelected(channel),
+                        trailingAccessory: {
+                            Button(action: { bookmarks.toggle(gh) }) {
+                                Image(systemName: bookmarks.isBookmarked(gh) ? "bookmark.fill" : "bookmark")
+                                    .font(.system(size: 14))
+                            }
+                            .buttonStyle(.plain)
+                            .padding(.leading, 8)
+                        }
+                    ) {
+                        // For bookmarked selection, mark teleported based on regional membership
+                        let inRegional = manager.availableChannels.contains { $0.geohash == gh }
+                        if !inRegional && !manager.availableChannels.isEmpty {
+                            manager.markTeleported(for: gh, true)
+                        } else {
+                            manager.markTeleported(for: gh, false)
+                        }
+                        manager.select(ChannelID.location(channel))
+                        isPresented = false
+                    }
+                    .onAppear { bookmarks.resolveNameIfNeeded(for: gh) }
+                }
+            }
+
             // Footer action inside the list
             if manager.permissionState == LocationChannelManager.PermissionState.authorized {
                 Button(action: {
-                    if let url = URL(string: UIApplication.openSettingsURLString) {
+                    openSystemLocationSettings()
-                        UIApplication.shared.open(url)
-                    }
                 }) {
                     Text("remove location access")
                         .font(.system(size: 12, design: .monospaced))
@@ -214,14 +277,24 @@ struct LocationChannelsSheet: View {
         return false
     }
 
-    private func channelRow(title: String, subtitlePrefix: String, subtitleName: String? = nil, subtitleNameBold: Bool = false, isSelected: Bool, titleColor: Color? = nil, titleBold: Bool = false, action: @escaping () -> Void) -> some View {
+    @ViewBuilder
-        Button(action: action) {
+    private func channelRow(
-            HStack {
+        title: String,
-                VStack(alignment: .leading) {
+        subtitlePrefix: String,
-                    // Render title with smaller font for trailing count in parentheses
+        subtitleName: String? = nil,
-                    let parts = splitTitleAndCount(title)
+        subtitleNameBold: Bool = false,
-                    HStack(spacing: 4) {
+        isSelected: Bool,
-                        Text(parts.base)
+        titleColor: Color? = nil,
+        titleBold: Bool = false,
+        @ViewBuilder trailingAccessory: () -> some View = { EmptyView() },
+        action: @escaping () -> Void
+    ) -> some View {
+        HStack(alignment: .center, spacing: 8) {
+            VStack(alignment: .leading) {
+                // Render title with smaller font for trailing count in parentheses
+                let parts = splitTitleAndCount(title)
+                HStack(spacing: 4) {
+                    Text(parts.base)
                             .font(.system(size: 14, design: .monospaced))
                             .fontWeight(titleBold ? .bold : .regular)
                             .foregroundColor(titleColor ?? Color.primary)
@@ -243,6 +316,8 @@ struct LocationChannelsSheet: View {
                                 .font(.system(size: 12, design: .monospaced))
                                 .fontWeight(subtitleNameBold ? .bold : .regular)
                                 .foregroundColor(.secondary)
+                                .lineLimit(1)
+                                .truncationMode(.tail)
                         }
                     }
                 }
@@ -252,11 +327,11 @@ struct LocationChannelsSheet: View {
                         .font(.system(size: 16, design: .monospaced))
                         .foregroundColor(standardGreen)
                 }
+                trailingAccessory()
             }
             .frame(maxWidth: .infinity, alignment: .leading)
-            .contentShape(Rectangle())
+        .contentShape(Rectangle())
-        }
+        .onTapGesture(perform: action)
-        .buttonStyle(.plain)
     }
 
     // Split a title like "#mesh [3 people]" into base and suffix "[3 people]"
@@ -276,20 +351,28 @@ struct LocationChannelsSheet: View {
     }
 
     private func meshCount() -> Int {
+        // Count mesh-connected OR mesh-reachable peers (exclude self)
         let myID = viewModel.meshService.myPeerID
         return viewModel.allPeers.reduce(0) { acc, peer in
-            if peer.id != myID && peer.isConnected { return acc + 1 }
+            if peer.id != myID && (peer.isConnected || peer.isReachable) { return acc + 1 }
             return acc
         }
     }
 
     private func geohashTitleWithCount(for channel: GeohashChannel) -> String {
-        // Use ViewModel's 5-minute activity counts; may be 0 for non-selected channels
+        // Main list: keep level labels (block/neighborhood/city/province/region)
         let count = viewModel.geohashParticipantCount(for: channel.geohash)
         let noun = count == 1 ? "person" : "people"
         return "\(channel.level.displayName.lowercased()) [\(count) \(noun)]"
     }
 
+    private func geohashHashTitleWithCount(_ geohash: String) -> String {
+        // Bookmarked list: show the #geohash as the main label
+        let count = viewModel.geohashParticipantCount(for: geohash)
+        let noun = count == 1 ? "person" : "people"
+        return "#\(geohash) [\(count) \(noun)]"
+    }
+
     private func validateGeohash(_ s: String) -> Bool {
         let allowed = Set("0123456789bcdefghjkmnpqrstuvwxyz")
         guard !s.isEmpty, s.count <= 12 else { return false }
@@ -343,7 +426,7 @@ extension LocationChannelsSheet {
         }()
 
         let usesMetric: Bool = {
-            if #available(iOS 16.0, *) {
+            if #available(iOS 16.0, macOS 13.0, *) {
                 return Locale.current.measurementSystem == .metric
             } else {
                 return Locale.current.usesMetricSystem
@@ -366,7 +449,7 @@ extension LocationChannelsSheet {
 
     private func bluetoothRangeString() -> String {
         let usesMetric: Bool = {
-            if #available(iOS 16.0, *) {
+            if #available(iOS 16.0, macOS 13.0, *) {
                 return Locale.current.measurementSystem == .metric
             } else {
                 return Locale.current.usesMetricSystem
@@ -390,4 +473,17 @@ extension LocationChannelsSheet {
     }
 }
 
-#endif
+// MARK: - Open Settings helper
+private func openSystemLocationSettings() {
+    #if os(iOS)
+    if let url = URL(string: UIApplication.openSettingsURLString) {
+        UIApplication.shared.open(url)
+    }
+    #else
+    if let url = URL(string: "x-apple.systempreferences:com.apple.preference.security?Privacy_LocationServices") {
+        NSWorkspace.shared.open(url)
+    } else if let url = URL(string: "x-apple.systempreferences:com.apple.preference.security") {
+        NSWorkspace.shared.open(url)
+    }
+    #endif
+}

bitchat/Views/MeshPeerList.swift

@@ -52,6 +52,11 @@ struct MeshPeerList: View {
                             Image(systemName: "antenna.radiowaves.left.and.right")
                                 .font(.system(size: 10))
                                 .foregroundColor(baseColor)
+                        } else if peer.isReachable {
+                            // Mesh-reachable (relayed): point.3 icon
+                            Image(systemName: "point.3.filled.connected.trianglepath.dotted")
+                                .font(.system(size: 10))
+                                .foregroundColor(baseColor)
                         } else if peer.isMutualFavorite {
                             // Mutual favorite reachable via Nostr: globe icon (purple)
                             Image(systemName: "globe")
@@ -85,14 +90,39 @@ struct MeshPeerList: View {
                                 .help("Blocked")
                         }
 
-                        if let icon = item.enc.icon, !isMe {
+                        if !isMe {
-                            Image(systemName: icon)
+                            if peer.isConnected {
-                                .font(.system(size: 10))
+                                if let icon = item.enc.icon {
-                                .foregroundColor(baseColor)
+                                    Image(systemName: icon)
+                                        .font(.system(size: 10))
+                                        .foregroundColor(baseColor)
+                                }
+                            } else {
+                                // Offline: prefer showing verified badge from persisted fingerprints
+                                if let fp = viewModel.getFingerprint(for: peer.id),
+                                   viewModel.verifiedFingerprints.contains(fp) {
+                                    Image(systemName: "checkmark.seal.fill")
+                                        .font(.system(size: 10))
+                                        .foregroundColor(baseColor)
+                                } else if let icon = item.enc.icon {
+                                    // Fallback to whatever status says (likely lock if we had a past session)
+                                    Image(systemName: icon)
+                                        .font(.system(size: 10))
+                                        .foregroundColor(baseColor)
+                                }
+                            }
                         }
 
                         Spacer()
 
+                        // Unread message indicator for this peer
+                        if !isMe, item.hasUnread {
+                            Image(systemName: "envelope.fill")
+                                .font(.system(size: 10))
+                                .foregroundColor(.orange)
+                                .help("New messages")
+                        }
+
                         if !isMe {
                             Button(action: { onToggleFavorite(peer.id) }) {
                                 Image(systemName: (peer.favoriteStatus?.isFavorite ?? false) ? "star.fill" : "star")

bitchat/Views/VerificationViews.swift

@@ -0,0 +1,347 @@
+import SwiftUI
+import CoreImage
+import CoreImage.CIFilterBuiltins
+#if os(iOS)
+import UIKit
+#else
+import AppKit
+#endif
+
+/// Placeholder view to display the user's verification QR payload as text.
+struct MyQRView: View {
+    let qrString: String
+    @Environment(\.colorScheme) var colorScheme
+    private var boxColor: Color { Color.gray.opacity(0.1) }
+
+    var body: some View {
+        VStack(spacing: 12) {
+            Text("scan to verify me")
+                .font(.system(size: 16, weight: .bold, design: .monospaced))
+
+            VStack(spacing: 10) {
+                QRCodeImage(data: qrString, size: 240)
+                    .accessibilityLabel("verification qr code")
+
+                // Non-scrolling, fully visible URL (wraps across lines)
+                Text(qrString)
+                    .font(.system(size: 11, design: .monospaced))
+                    .textSelection(.enabled)
+                    .multilineTextAlignment(.leading)
+                    .fixedSize(horizontal: false, vertical: true)
+                    .padding(8)
+                    .background(boxColor)
+                    .cornerRadius(8)
+            }
+            .padding()
+            .frame(maxWidth: .infinity)
+            .background(boxColor)
+            .cornerRadius(8)
+        }
+        .padding()
+    }
+}
+
+// Render a QR code image for a given string using CoreImage
+struct QRCodeImage: View {
+    let data: String
+    let size: CGFloat
+
+    private let context = CIContext()
+    private let filter = CIFilter.qrCodeGenerator()
+
+    var body: some View {
+        Group {
+            if let image = generateImage() {
+                ImageWrapper(image: image)
+                    .frame(width: size, height: size)
+            } else {
+                RoundedRectangle(cornerRadius: 8)
+                    .stroke(Color.gray.opacity(0.5), lineWidth: 1)
+                    .frame(width: size, height: size)
+                    .overlay(
+                        Text("qr unavailable")
+                            .font(.system(size: 12, design: .monospaced))
+                            .foregroundColor(.gray)
+                    )
+            }
+        }
+    }
+
+    private func generateImage() -> CGImage? {
+        let inputData = Data(data.utf8)
+        filter.message = inputData
+        filter.correctionLevel = "M"
+        guard let outputImage = filter.outputImage else { return nil }
+        let scale = max(1, Int(size / 32))
+        let transformed = outputImage.transformed(by: CGAffineTransform(scaleX: CGFloat(scale), y: CGFloat(scale)))
+        return context.createCGImage(transformed, from: transformed.extent)
+    }
+}
+
+// Platform-specific wrapper to display CGImage in SwiftUI
+struct ImageWrapper: View {
+    let image: CGImage
+    var body: some View {
+        #if os(iOS)
+        let ui = UIImage(cgImage: image)
+        return Image(uiImage: ui)
+            .interpolation(.none)
+            .resizable()
+        #else
+        let ns = NSImage(cgImage: image, size: .zero)
+        return Image(nsImage: ns)
+            .interpolation(.none)
+            .resizable()
+        #endif
+    }
+}
+
+/// Placeholder scanner UI; real camera scanning will be added later.
+struct QRScanView: View {
+    @EnvironmentObject var viewModel: ChatViewModel
+    var isActive: Bool = true
+    @State private var input = ""
+    @State private var result: String = "" // not shown for iOS scanner
+    @State private var lastValid: String = ""
+    var body: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            #if os(iOS)
+            CameraScannerView(isActive: isActive) { code in
+                if let qr = VerificationService.shared.verifyScannedQR(code) {
+                    let ok = viewModel.beginQRVerification(with: qr)
+                    if !ok { /* already pending; continue scanning */ }
+                    lastValid = code
+                } else {
+                    // ignore invalid reads; continue scanning
+                }
+            }
+            .frame(height: 260)
+            .clipShape(RoundedRectangle(cornerRadius: 8))
+            #else
+            Text("paste qr content to validate:")
+                .font(.system(size: 14, weight: .medium, design: .monospaced))
+            TextEditor(text: $input)
+                .frame(height: 100)
+                .border(Color.gray.opacity(0.4))
+            Button("validate") {
+                if let qr = VerificationService.shared.verifyScannedQR(input) {
+                    let ok = viewModel.beginQRVerification(with: qr)
+                    result = ok ? "verification requested for \(qr.nickname)" : "could not find matching peer"
+                } else {
+                    result = "invalid or expired qr payload"
+                }
+            }
+            .buttonStyle(.bordered)
+            #endif
+            // No status text under camera per design
+            Spacer()
+        }
+        .padding()
+    }
+}
+
+#if os(iOS)
+import AVFoundation
+
+struct CameraScannerView: UIViewRepresentable {
+    typealias UIViewType = PreviewView
+    var isActive: Bool
+    var onCode: (String) -> Void
+
+    func makeUIView(context: Context) -> PreviewView {
+        let view = PreviewView()
+        context.coordinator.setup(sessionOwner: view, onCode: onCode)
+        context.coordinator.setActive(isActive)
+        return view
+    }
+
+    func updateUIView(_ uiView: PreviewView, context: Context) {
+        context.coordinator.setActive(isActive)
+    }
+
+    func makeCoordinator() -> Coordinator { Coordinator() }
+
+    final class Coordinator: NSObject, AVCaptureMetadataOutputObjectsDelegate {
+        private var onCode: ((String) -> Void)?
+        private weak var owner: PreviewView?
+        private let session = AVCaptureSession()
+        private var isRunning = false
+        private var permissionGranted = false
+        private var desiredActive = false
+
+        func setup(sessionOwner: PreviewView, onCode: @escaping (String) -> Void) {
+            self.owner = sessionOwner
+            self.onCode = onCode
+            session.beginConfiguration()
+            session.sessionPreset = .high
+            guard let device = AVCaptureDevice.default(for: .video),
+                  let input = try? AVCaptureDeviceInput(device: device),
+                  session.canAddInput(input) else { return }
+            session.addInput(input)
+            let output = AVCaptureMetadataOutput()
+            guard session.canAddOutput(output) else { return }
+            session.addOutput(output)
+            output.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
+            if output.availableMetadataObjectTypes.contains(.qr) {
+                output.metadataObjectTypes = [.qr]
+            }
+            session.commitConfiguration()
+            sessionOwner.videoPreviewLayer.session = session
+            // Request permission and start
+            AVCaptureDevice.requestAccess(for: .video) { granted in
+                self.permissionGranted = granted
+                if granted && self.desiredActive && !self.isRunning {
+                    self.setActive(true)
+                }
+            }
+        }
+
+        func setActive(_ active: Bool) {
+            desiredActive = active
+            guard permissionGranted else { return }
+            if active && !isRunning {
+                isRunning = true
+                DispatchQueue.global(qos: .userInitiated).async {
+                    if !self.session.isRunning { self.session.startRunning() }
+                }
+            } else if !active && isRunning {
+                isRunning = false
+                DispatchQueue.global(qos: .userInitiated).async {
+                    if self.session.isRunning { self.session.stopRunning() }
+                }
+            }
+        }
+
+        func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {
+            for obj in metadataObjects {
+                guard let m = obj as? AVMetadataMachineReadableCodeObject,
+                      m.type == .qr,
+                      let str = m.stringValue else { continue }
+                onCode?(str)
+            }
+        }
+    }
+
+    final class PreviewView: UIView {
+        override class var layerClass: AnyClass { AVCaptureVideoPreviewLayer.self }
+        var videoPreviewLayer: AVCaptureVideoPreviewLayer { layer as! AVCaptureVideoPreviewLayer }
+        override init(frame: CGRect) {
+            super.init(frame: frame)
+            videoPreviewLayer.videoGravity = .resizeAspectFill
+        }
+        required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }
+    }
+}
+#endif
+
+// Combined sheet: shows my QR by default with a button to scan instead
+struct VerificationSheetView: View {
+    @EnvironmentObject var viewModel: ChatViewModel
+    @Binding var isPresented: Bool
+    @State private var showingScanner = false
+    @Environment(\.colorScheme) var colorScheme
+
+    private var backgroundColor: Color { colorScheme == .dark ? Color.black : Color.white }
+    private var accentColor: Color { colorScheme == .dark ? Color.green : Color(red: 0, green: 0.5, blue: 0) }
+    private var boxColor: Color { Color.gray.opacity(0.1) }
+
+    private func myQRString() -> String {
+        let npub = try? NostrIdentityBridge.getCurrentNostrIdentity()?.npub
+        return VerificationService.shared.buildMyQRString(nickname: viewModel.nickname, npub: npub) ?? ""
+    }
+
+    var body: some View {
+        VStack(spacing: 0) {
+            // Top header (always at top)
+            HStack {
+                Text("VERIFY")
+                    .font(.system(size: 14, weight: .bold, design: .monospaced))
+                    .foregroundColor(accentColor)
+                Spacer()
+                Button(action: {
+                    showingScanner = false
+                    isPresented = false
+                }) {
+                    Image(systemName: "xmark")
+                        .font(.system(size: 14, weight: .semibold))
+                        .foregroundColor(accentColor)
+                }
+                .buttonStyle(.plain)
+            }
+            .padding(.horizontal, 16)
+            .padding(.top, 12)
+            .padding(.bottom, 8)
+
+            Divider()
+
+            // Content area
+            Group {
+                if showingScanner {
+                    VStack(alignment: .leading, spacing: 12) {
+                        Text("scan a friend's qr")
+                            .font(.system(size: 16, weight: .bold, design: .monospaced))
+                            .frame(maxWidth: .infinity)
+                            .multilineTextAlignment(.center)
+                            .foregroundColor(accentColor)
+                        #if os(iOS)
+                        QRScanView(isActive: showingScanner)
+                            .environmentObject(viewModel)
+                            .frame(height: 280)
+                            .clipShape(RoundedRectangle(cornerRadius: 10))
+                        #else
+                        QRScanView()
+                            .environmentObject(viewModel)
+                        #endif
+                    }
+                    .padding()
+                    .frame(maxWidth: .infinity)
+                    .background(boxColor)
+                    .cornerRadius(8)
+                } else {
+                    let qr = myQRString()
+                    MyQRView(qrString: qr)
+                }
+            }
+            .padding(16)
+            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)
+
+            // Centered controls moved up
+            VStack(spacing: 10) {
+                if showingScanner {
+                    Button(action: { showingScanner = false }) {
+                        Label("show my qr", systemImage: "qrcode")
+                            .font(.system(size: 13, design: .monospaced))
+                    }
+                    .buttonStyle(.bordered)
+                } else {
+                    Button(action: { showingScanner = true }) {
+                        Label("scan someone else's qr", systemImage: "camera.viewfinder")
+                            .font(.system(size: 13, weight: .medium, design: .monospaced))
+                    }
+                    .buttonStyle(.bordered)
+                    .tint(.gray)
+                }
+
+                // Optional: Remove verification for selected peer (if verified)
+                if let pid = viewModel.selectedPrivateChatPeer,
+                   let fp = viewModel.getFingerprint(for: pid),
+                   viewModel.verifiedFingerprints.contains(fp) {
+                    Button(action: { viewModel.unverifyFingerprint(for: pid) }) {
+                        Label("remove verification", systemImage: "minus.circle")
+                            .font(.system(size: 12, design: .monospaced))
+                    }
+                    .buttonStyle(.bordered)
+                    .tint(.gray)
+                }
+            }
+            .frame(maxWidth: .infinity)
+            .padding(.vertical, 14)
+        }
+        .background(backgroundColor)
+        #if os(iOS)
+        .presentationDetents([.large])
+        .presentationDragIndicator(.visible)
+        #endif
+        .onDisappear { showingScanner = false }
+    }
+}

bitchat/bitchat-macOS.entitlements

@@ -10,6 +10,8 @@
 	</array>
 	<key>com.apple.security.device.bluetooth</key>
 	<true/>
+	<key>com.apple.security.personal-information.location</key>
+	<true/>
 	<key>com.apple.security.network.client</key>
 	<true/>
 </dict>

bitchatShareExtension/ShareViewController.swift

@@ -7,160 +7,160 @@
 //
 
 import UIKit
-import Social
 import UniformTypeIdentifiers
 
-class ShareViewController: SLComposeServiceViewController {
+/// Modern share extension using UIKit + UTTypes.
+/// Avoids deprecated Social framework and SLComposeServiceViewController.
+final class ShareViewController: UIViewController {
+    private let statusLabel: UILabel = {
+        let l = UILabel()
+        l.translatesAutoresizingMaskIntoConstraints = false
+        l.font = .systemFont(ofSize: 15, weight: .semibold)
+        l.textAlignment = .center
+        l.numberOfLines = 0
+        l.textColor = .label
+        return l
+    }()
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Set placeholder text
+        view.backgroundColor = .systemBackground
-        placeholder = "Share to bitchat..."
+        view.addSubview(statusLabel)
-        // Set character limit (optional)
+        NSLayoutConstraint.activate([
-        charactersRemaining = 500
+            statusLabel.centerXAnchor.constraint(equalTo: view.centerXAnchor),
+            statusLabel.centerYAnchor.constraint(equalTo: view.centerYAnchor),
+            statusLabel.leadingAnchor.constraint(greaterThanOrEqualTo: view.layoutMarginsGuide.leadingAnchor),
+            statusLabel.trailingAnchor.constraint(lessThanOrEqualTo: view.layoutMarginsGuide.trailingAnchor)
+        ])
+
+        processShare()
     }
 
-    override func isContentValid() -> Bool {
+    // MARK: - Processing
-        // Validate that we have text content or attachments
+    private func processShare() {
-        if let text = contentText, !text.isEmpty {
+        guard let ctx = self.extensionContext,
-            return true
+              let item = ctx.inputItems.first as? NSExtensionItem else {
-        }
+            finishWithMessage("Nothing to share")
-        // Check if we have attachments
-        if let item = extensionContext?.inputItems.first as? NSExtensionItem,
-           let attachments = item.attachments,
-           !attachments.isEmpty {
-            return true
-        }
-        return false
-    }
-    
-    override func didSelectPost() {
-        guard let extensionItem = extensionContext?.inputItems.first as? NSExtensionItem else {
-            self.extensionContext?.completeRequest(returningItems: nil, completionHandler: nil)
             return
         }
 
-        
+        // Try content from attributed text first (Safari often passes URL here)
-        // Get the page title from the compose view or extension item
+        if let url = detectURL(in: item.attributedContentText?.string ?? "") {
-        let pageTitle = self.contentText ?? extensionItem.attributedContentText?.string ?? extensionItem.attributedTitle?.string
+            saveAndFinish(url: url, title: item.attributedTitle?.string)
-        
+            return
-        var foundURL: URL? = nil
-        let group = DispatchGroup()
-        
-        // IMPORTANT: Check if the NSExtensionItem itself has a URL
-        // Safari often provides the URL as an attributedString with a link
-        if let attributedText = extensionItem.attributedContentText {
-            let text = attributedText.string
-            let detector = try? NSDataDetector(types: NSTextCheckingResult.CheckingType.link.rawValue)
-            let matches = detector?.matches(in: text, options: [], range: NSRange(location: 0, length: text.utf16.count))
-            if let firstMatch = matches?.first, let url = firstMatch.url {
-                foundURL = url
-            }
         }
 
-        // Only check attachments if we haven't found a URL yet
+        // Scan attachments for URL/text
-        if foundURL == nil {
+        let providers = item.attachments ?? []
-            for (_, itemProvider) in (extensionItem.attachments ?? []).enumerated() {
+        if providers.isEmpty {
-                
+            // Fallback: use attributed title as plain text
-                // Try multiple URL type identifiers that Safari might use
+            if let title = item.attributedTitle?.string, !title.isEmpty {
-                let urlTypes = [
+                saveAndFinish(text: title)
-                    UTType.url.identifier,
+            } else {
-                    "public.url",
+                finishWithMessage("No shareable content")
-                    "public.file-url"
-                ]
-                
-                for urlType in urlTypes {
-                    if itemProvider.hasItemConformingToTypeIdentifier(urlType) {
-                        group.enter()
-                        itemProvider.loadItem(forTypeIdentifier: urlType, options: nil) { (item, error) in
-                            defer { group.leave() }
-                            
-                            if let url = item as? URL {
-                                foundURL = url
-                        } else if let data = item as? Data,
-                                  let urlString = String(data: data, encoding: .utf8),
-                                  let url = URL(string: urlString) {
-                            foundURL = url
-                        } else if let string = item as? String,
-                                  let url = URL(string: string) {
-                            foundURL = url
-                        }
-                    }
-                    break // Found a URL type, no need to check other types
-                }
             }
+            return
+        }
 
-            // Also check for plain text that might be a URL
+        // Load URL or text asynchronously
-            if foundURL == nil && itemProvider.hasItemConformingToTypeIdentifier(UTType.plainText.identifier) {
+        loadFirstURL(from: providers) { [weak self] url in
-                group.enter()
+            guard let self = self else { return }
-                itemProvider.loadItem(forTypeIdentifier: UTType.plainText.identifier, options: nil) { (item, error) in
+            if let url = url {
-                    defer { group.leave() }
+                self.saveAndFinish(url: url, title: item.attributedTitle?.string)
-                    
+            } else {
-                    if let text = item as? String {
+                self.loadFirstPlainText(from: providers) { text in
-                        // Check if the text is actually a URL
+                    if let t = text, !t.isEmpty {
-                        if let url = URL(string: text),
+                        // Treat as URL if parseable http(s), else plain text
-                           (url.scheme == "http" || url.scheme == "https") {
+                        if let u = URL(string: t), ["http","https"].contains(u.scheme?.lowercased() ?? "") {
-                            foundURL = url
+                            self.saveAndFinish(url: u, title: item.attributedTitle?.string)
+                        } else {
+                            self.saveAndFinish(text: t)
                         }
+                    } else {
+                        self.finishWithMessage("No shareable content")
                     }
                 }
             }
         }
-        } // End of if foundURL == nil
+    }
 
-        // Process after all checks complete
+    private func detectURL(in text: String) -> URL? {
-        group.notify(queue: .main) { [weak self] in
+        guard !text.isEmpty else { return nil }
-            if let url = foundURL {
+        let detector = try? NSDataDetector(types: NSTextCheckingResult.CheckingType.link.rawValue)
-                // We have a URL! Create the JSON data
+        let range = NSRange(location: 0, length: (text as NSString).length)
-                let urlData: [String: String] = [
+        let match = detector?.matches(in: text, options: [], range: range).first
-                    "url": url.absoluteString,
+        return match?.url
-                    "title": pageTitle ?? url.host ?? "Shared Link"
+    }
-                ]
 
+    private func loadFirstURL(from providers: [NSItemProvider], completion: @escaping (URL?) -> Void) {
+        let identifiers = [UTType.url.identifier, "public.url", "public.file-url"]
+        let grp = DispatchGroup()
+        var found: URL?
 
-                if let jsonData = try? JSONSerialization.data(withJSONObject: urlData),
+        for p in providers where found == nil {
-                   let jsonString = String(data: jsonData, encoding: .utf8) {
+            for id in identifiers where p.hasItemConformingToTypeIdentifier(id) {
-                    self?.saveToSharedDefaults(content: jsonString, type: "url")
+                grp.enter()
+                p.loadItem(forTypeIdentifier: id, options: nil) { item, _ in
+                    defer { grp.leave() }
+                    if let u = item as? URL { found = u; return }
+                    if let s = item as? String, let u = URL(string: s) { found = u; return }
+                    if let d = item as? Data, let s = String(data: d, encoding: .utf8), let u = URL(string: s) { found = u; return }
                 }
-            } else if let title = pageTitle, !title.isEmpty {
+                break
-                // No URL found, just share the text
-                self?.saveToSharedDefaults(content: title, type: "text")
             }
+        }
+        grp.notify(queue: .main) { completion(found) }
+    }
 
-            self?.extensionContext?.completeRequest(returningItems: nil, completionHandler: nil)
+    private func loadFirstPlainText(from providers: [NSItemProvider], completion: @escaping (String?) -> Void) {
+        let id = UTType.plainText.identifier
+        let grp = DispatchGroup()
+        var text: String?
+        for p in providers where p.hasItemConformingToTypeIdentifier(id) {
+            grp.enter()
+            p.loadItem(forTypeIdentifier: id, options: nil) { item, _ in
+                defer { grp.leave() }
+                if let s = item as? String { text = s }
+                else if let d = item as? Data, let s = String(data: d, encoding: .utf8) { text = s }
+            }
+            break
+        }
+        grp.notify(queue: .main) { completion(text) }
+    }
+
+    // MARK: - Save + Finish
+    private func saveAndFinish(url: URL, title: String?) {
+        let payload: [String: String] = [
+            "url": url.absoluteString,
+            "title": title ?? url.host ?? "Shared Link"
+        ]
+        if let json = try? JSONSerialization.data(withJSONObject: payload),
+           let s = String(data: json, encoding: .utf8) {
+            saveToSharedDefaults(content: s, type: "url")
+            finishWithMessage("✓ Shared link to bitchat")
+        } else {
+            finishWithMessage("Failed to encode link")
         }
     }
 
-    override func configurationItems() -> [Any]! {
+    private func saveAndFinish(text: String) {
-        // No configuration items needed
+        saveToSharedDefaults(content: text, type: "text")
-        return []
+        finishWithMessage("✓ Shared text to bitchat")
     }
 
-    // MARK: - Helper Methods
-    
     private func saveToSharedDefaults(content: String, type: String) {
-        // Use app groups to share data between extension and main app
+        guard let userDefaults = UserDefaults(suiteName: "group.chat.bitchat") else { return }
-        guard let userDefaults = UserDefaults(suiteName: "group.chat.bitchat") else {
-            return
-        }
-        
         userDefaults.set(content, forKey: "sharedContent")
         userDefaults.set(type, forKey: "sharedContentType")
         userDefaults.set(Date(), forKey: "sharedContentDate")
-        userDefaults.synchronize()
+        // No need to force synchronize; the system persists changes
-        
-        
-        // Force open the main app
-        self.openMainApp()
     }
 
-    private func openMainApp() {
+    private func finishWithMessage(_ msg: String) {
-        // Share extensions cannot directly open the containing app
+        statusLabel.text = msg
-        // The app will check for shared content when it becomes active
+        // Complete shortly after showing status
-        // Show success feedback to user
+        DispatchQueue.main.asyncAfter(deadline: .now() + TransportConfig.uiShareExtensionDismissDelaySeconds) {
-        DispatchQueue.main.async {
+            self.extensionContext?.completeRequest(returningItems: nil, completionHandler: nil)
-            self.textView.text = "✓ Shared to bitchat"
-            self.textView.isEditable = false
         }
     }
 }

bitchatTests/GeohashBookmarksStoreTests.swift

@@ -0,0 +1,51 @@
+import XCTest
+@testable import bitchat
+
+final class GeohashBookmarksStoreTests: XCTestCase {
+    let storeKey = "locationChannel.bookmarks"
+
+    override func setUp() {
+        super.setUp()
+        // Clear persisted state before each test
+        UserDefaults.standard.removeObject(forKey: storeKey)
+        GeohashBookmarksStore.shared._resetForTesting()
+    }
+
+    override func tearDown() {
+        // Clean after each test
+        UserDefaults.standard.removeObject(forKey: storeKey)
+        GeohashBookmarksStore.shared._resetForTesting()
+        super.tearDown()
+    }
+
+    func testToggleAndNormalize() {
+        let store = GeohashBookmarksStore.shared
+        // Start clean
+        XCTAssertTrue(store.bookmarks.isEmpty)
+
+        // Add with mixed case and hash prefix
+        store.toggle("#U4PRUY")
+        XCTAssertTrue(store.isBookmarked("u4pruy"))
+        XCTAssertEqual(store.bookmarks.first, "u4pruy")
+
+        // Toggling again removes
+        store.toggle("u4pruy")
+        XCTAssertFalse(store.isBookmarked("u4pruy"))
+        XCTAssertTrue(store.bookmarks.isEmpty)
+    }
+
+    func testPersistenceWritten() throws {
+        let store = GeohashBookmarksStore.shared
+        store.toggle("ezs42")
+        store.toggle("u4pruy")
+
+        // Verify persisted JSON contains both (order not enforced here)
+        guard let data = UserDefaults.standard.data(forKey: storeKey) else {
+            XCTFail("No persisted data found")
+            return
+        }
+        let arr = try JSONDecoder().decode([String].self, from: data)
+        XCTAssertTrue(arr.contains("ezs42"))
+        XCTAssertTrue(arr.contains("u4pruy"))
+    }
+}

bitchatTests/NostrProtocolTests.swift

@@ -21,8 +21,10 @@ final class NostrProtocolTests: XCTestCase {
         let sender = try NostrIdentity.generate()
         let recipient = try NostrIdentity.generate()
         
+        #if DEBUG
         print("Sender pubkey: \(sender.publicKeyHex)")
         print("Recipient pubkey: \(recipient.publicKeyHex)")
+        #endif
         
         // Create a test message
         let originalContent = "Hello from NIP-17 test!"
@@ -34,8 +36,10 @@ final class NostrProtocolTests: XCTestCase {
             senderIdentity: sender
         )
         
+        #if DEBUG
         print("Gift wrap created with ID: \(giftWrap.id)")
         print("Gift wrap pubkey: \(giftWrap.pubkey)")
+        #endif
         
         // Decrypt the gift wrap
         let (decryptedContent, senderPubkey, timestamp) = try NostrProtocol.decryptPrivateMessage(
@@ -52,7 +56,9 @@ final class NostrProtocolTests: XCTestCase {
         let timeDiff = abs(messageDate.timeIntervalSinceNow)
         XCTAssertLessThan(timeDiff, 60, "Message timestamp should be recent")
         
+        #if DEBUG
         print("✅ Successfully decrypted message: '\(decryptedContent)' from \(senderPubkey) at \(messageDate)")
+        #endif
     }
     
     func testGiftWrapUsesUniqueEphemeralKeys() throws {
@@ -75,8 +81,10 @@ final class NostrProtocolTests: XCTestCase {
         
         // Gift wrap pubkeys should be different (unique ephemeral keys)
         XCTAssertNotEqual(message1.pubkey, message2.pubkey)
+        #if DEBUG
         print("Message 1 gift wrap pubkey: \(message1.pubkey)")
         print("Message 2 gift wrap pubkey: \(message2.pubkey)")
+        #endif
         
         // Both should decrypt successfully
         let (content1, _, _) = try NostrProtocol.decryptPrivateMessage(
@@ -109,7 +117,9 @@ final class NostrProtocolTests: XCTestCase {
             giftWrap: giftWrap,
             recipientIdentity: wrongRecipient
         )) { error in
+            #if DEBUG
             print("Expected error when decrypting with wrong key: \(error)")
+            #endif
         }
     }
 

bitchatTests/TestUtilities/LegacyTestProtocolTypes.swift

@@ -1,45 +0,0 @@
-//
-// LegacyTestProtocolTypes.swift
-// bitchatTests
-//
-// Minimal legacy protocol types used only by tests to simulate old flows.
-// These are not part of production code anymore.
-
-import Foundation
-
-struct ProtocolNack {
-    let originalPacketID: String
-    let nackID: String
-    let senderID: String
-    let receiverID: String
-    let packetType: UInt8
-    let reason: String
-    let errorCode: UInt8
-    
-    enum ErrorCode: UInt8 {
-        case unknown = 0
-        case decryptionFailed = 2
-    }
-    
-    init(originalPacketID: String, senderID: String, receiverID: String, packetType: UInt8, reason: String, errorCode: ErrorCode = .unknown) {
-        self.originalPacketID = originalPacketID
-        self.nackID = UUID().uuidString
-        self.senderID = senderID
-        self.receiverID = receiverID
-        self.packetType = packetType
-        self.reason = reason
-        self.errorCode = errorCode.rawValue
-    }
-    
-    func toBinaryData() -> Data {
-        // Tests don't parse the payload; return a compact encoding for completeness
-        var data = Data()
-        data.appendUUID(originalPacketID)
-        data.appendUUID(nackID)
-        data.append(UInt8(packetType))
-        data.append(UInt8(errorCode))
-        data.appendString(reason)
-        return data
-    }
-}
-

build.log

@@ -1,13 +0,0 @@
-Command line invocation:
-    /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -project bitchat.xcodeproj -scheme bitchat -configuration Debug -sdk iphonesimulator CODE_SIGNING_ALLOWED=NO ONLY_ACTIVE_ARCH=YES
-
-Build settings from command line:
-    CODE_SIGNING_ALLOWED = NO
-    ONLY_ACTIVE_ARCH = YES
-    SDKROOT = iphonesimulator18.5
-
-Resolve Package Graph
-/Users/jack/Library/org.swift.swiftpm/configuration is not accessible or not writable, disabling user-level cache features./Users/jack/Library/org.swift.swiftpm/security is not accessible or not writable, disabling user-level cache features./Users/jack/Library/Caches/org.swift.swiftpm is not accessible or not writable, disabling user-level cache features.
-Package: swift-secp256k1
-
-fatalError