UI: diversify peer colors; smarter geo notifications; 21m live location

- Use minimal-distance hue palette for mesh and geohash lists; align chat sender colors with list palette.
- Add foreground geo notifications for different channels; deep-link to bitchat://geohash/<gh>; per-geohash 60s cooldown; respect self/blocks.
- Global geohash sampling runs outside the sheet; delegate handles deeplinks and suppresses when already in-channel.
- Switch location channel sheet to continuous CoreLocation with 21m distance filter; add config knob.
- Only link geohash hashtags when standalone (no @name#abcd or word#abcd).
- Include mesh-reachable peers in mesh counts and in "bitchatters nearby" notification.
- Add TransportConfig knobs for palette and geo notifications.

README.md

@@ -2,108 +2,59 @@
 
 ## bitchat
 
-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.
+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. 
 
 [bitchat.free](http://bitchat.free)
 
 📲 [App Store](https://apps.apple.com/us/app/bitchat-mesh/id6748219622)
 
 > [!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.
+> 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) for mesh, NIP-17 for Nostr
+- **Private Message End-to-End Encryption**: [Noise Protocol](http://noiseprotocol.org)
 - **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)
 
-BitChat uses a **hybrid messaging architecture** with two complementary transport layers:
+### Binary Protocol
+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
 
-### Bluetooth Mesh Network (Offline)
+### Mesh Networking
-
+- Each device acts as both client and peripheral
-- **Local Communication**: Direct peer-to-peer within Bluetooth range
+- Automatic peer discovery and connection management
-- **Multi-hop Relay**: Messages route through nearby devices (max 7 hops)
+- Adaptive duty cycling for battery optimization
-- **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
@@ -117,7 +68,6 @@ 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
@@ -134,5 +84,5 @@ For detailed protocol documentation, see the [Technical Whitepaper](WHITEPAPER.m
 
 ### Option 4: just
 
-Want to try this on macos: `just run` will set it up and run from source.
+Want to try this on macos: `just run` will set it up and run from source. 
 Run `just clean` afterwards to restore things to original state for mobile app building and development.

bitchat.xcodeproj/project.pbxproj

@@ -32,10 +32,6 @@
 		048A4BE72E5CCCC300162C4A /* TransportConfig.swift in Sources */ = {isa = PBXBuildFile; fileRef = 048A4BE62E5CCCC300162C4A /* TransportConfig.swift */; };
 		048A4BE82E5CCCC300162C4A /* TransportConfig.swift in Sources */ = {isa = PBXBuildFile; fileRef = 048A4BE62E5CCCC300162C4A /* TransportConfig.swift */; };
 		048A4BE92E5CCCC300162C4B /* TransportConfig.swift in Sources */ = {isa = PBXBuildFile; fileRef = 048A4BE62E5CCCC300162C4A /* TransportConfig.swift */; };
-		048A4C282E5FCD6600162C4A /* GeohashBookmarksStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 048A4C272E5FCD6600162C4A /* GeohashBookmarksStore.swift */; };
-		048A4C292E5FCD6600162C4A /* GeohashBookmarksStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 048A4C272E5FCD6600162C4A /* GeohashBookmarksStore.swift */; };
-		048A4C2B2E5FCE0300162C4A /* GeohashBookmarksStoreTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 048A4C2A2E5FCE0300162C4A /* GeohashBookmarksStoreTests.swift */; };
-		048A4C2C2E5FCE0300162C4A /* GeohashBookmarksStoreTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 048A4C2A2E5FCE0300162C4A /* GeohashBookmarksStoreTests.swift */; };
 		049BD3902E4EC4F0001A566B /* PrivateChatManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 049BD38F2E4EC4F0001A566B /* PrivateChatManager.swift */; };
 		049BD3912E4EC4F0001A566B /* AutocompleteService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 049BD38C2E4EC4F0001A566B /* AutocompleteService.swift */; };
 		049BD3922E4EC4F0001A566B /* CommandProcessor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 049BD38D2E4EC4F0001A566B /* CommandProcessor.swift */; };
@@ -209,8 +205,6 @@
 		047502B32E55FED60083520F /* MeshPeerList.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MeshPeerList.swift; sourceTree = "<group>"; };
 		047502B82E560F690083520F /* RelayController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RelayController.swift; sourceTree = "<group>"; };
 		048A4BE62E5CCCC300162C4A /* TransportConfig.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TransportConfig.swift; sourceTree = "<group>"; };
-		048A4C272E5FCD6600162C4A /* GeohashBookmarksStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GeohashBookmarksStore.swift; sourceTree = "<group>"; };
-		048A4C2A2E5FCE0300162C4A /* GeohashBookmarksStoreTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GeohashBookmarksStoreTests.swift; sourceTree = "<group>"; };
 		049BD38C2E4EC4F0001A566B /* AutocompleteService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AutocompleteService.swift; sourceTree = "<group>"; };
 		049BD38D2E4EC4F0001A566B /* CommandProcessor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CommandProcessor.swift; sourceTree = "<group>"; };
 		049BD38F2E4EC4F0001A566B /* PrivateChatManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PrivateChatManager.swift; sourceTree = "<group>"; };
@@ -489,7 +483,6 @@
 		C3D98EB3E1B455E321F519F4 /* bitchatTests */ = {
 			isa = PBXGroup;
 			children = (
-				048A4C2A2E5FCE0300162C4A /* GeohashBookmarksStoreTests.swift */,
 				D69A18D27F9A565FD6041E12 /* Info.plist */,
 				047502912E547ACC0083520F /* LocationChannelsTests.swift */,
 				C272F137CE00FC5A96E0CC06 /* NostrProtocolTests.swift */,
@@ -526,7 +519,6 @@
 		D98A3186D7E4C72E35BDF7FE /* Services */ = {
 			isa = PBXGroup;
 			children = (
-				048A4C272E5FCD6600162C4A /* GeohashBookmarksStore.swift */,
 				048A4BE62E5CCCC300162C4A /* TransportConfig.swift */,
 				AA77BB10CC22DD33EE44FF55 /* VerificationService.swift */,
 				047502B82E560F690083520F /* RelayController.swift */,
@@ -779,7 +771,6 @@
 				0475028C2E54171C0083520F /* LocationChannelManager.swift in Sources */,
 				AFF33EF44626EF0579D17EB1 /* NoiseHandshakeCoordinator.swift in Sources */,
 				8C1AB0F2D48207E0755DA91A /* NoiseProtocol.swift in Sources */,
-				048A4C282E5FCD6600162C4A /* GeohashBookmarksStore.swift in Sources */,
 				049BD3AC2E51E38E001A566B /* PeerIDResolver.swift in Sources */,
 				D691938B4029A04CC905FDC8 /* NoiseSecurityConsiderations.swift in Sources */,
 				8A14ADADF5CD7A79919CB655 /* NoiseSession.swift in Sources */,
@@ -839,7 +830,6 @@
 				0475028D2E54171C0083520F /* LocationChannelManager.swift in Sources */,
 				6D0D4A0B1D8B659DCBAE7C9C /* NoiseHandshakeCoordinator.swift in Sources */,
 				A7187D48B07C6857DE01D0ED /* NoiseProtocol.swift in Sources */,
-				048A4C292E5FCD6600162C4A /* GeohashBookmarksStore.swift in Sources */,
 				049BD3AB2E51E38E001A566B /* PeerIDResolver.swift in Sources */,
 				9CCF09F7527EC681A13FC246 /* NoiseSecurityConsiderations.swift in Sources */,
 				92D1CF17DF88EA298F6E5E8E /* NoiseSession.swift in Sources */,
@@ -876,7 +866,6 @@
 				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 */,
@@ -899,7 +888,6 @@
 				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 */,

bitchat/Protocols/Geohash.swift

@@ -87,28 +87,4 @@ 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/GeohashBookmarksStore.swift

@@ -1,227 +0,0 @@
-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

@@ -50,8 +50,10 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
            let arr = try? JSONDecoder().decode([String].self, from: data) {
             teleportedSet = Set(arr)
         }
-        // Do not eagerly mark teleported on startup; wait for location to compute regional set.
+        // Initialize teleported flag from persisted state if a location channel is selected
-        // This avoids showing teleported for in-region channels during cold start.
+        if case .location(let ch) = selectedChannel {
+            teleported = teleportedSet.contains(ch.geohash)
+        }
         let status: CLAuthorizationStatus
         if #available(iOS 14.0, macOS 11.0, *) {
             status = cl.authorizationStatus
@@ -59,15 +61,6 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
             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
@@ -136,21 +129,7 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
             case .mesh:
                 self.teleported = false
             case .location(let ch):
-                // If this geohash is in our current regional set, do NOT mark teleported.
+                self.teleported = self.teleportedSet.contains(ch.geohash)
-                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)
-                }
             }
         }
     }
@@ -223,25 +202,14 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         }
         Task { @MainActor in
             self.availableChannels = result
-            // Recompute teleported status based on whether the selected geohash is in our regional set
+            // Recompute teleported status based on persisted state OR current location vs selected channel
             switch self.selectedChannel {
             case .mesh:
                 self.teleported = false
             case .location(let ch):
-                // Membership check using freshly computed regional channels; avoids precision/rename drift
+                let persisted = self.teleportedSet.contains(ch.geohash)
-                let inRegional = result.contains { $0.geohash == ch.geohash }
+                let currentGH = Geohash.encode(latitude: coord.latitude, longitude: coord.longitude, precision: ch.level.precision)
-                if inRegional {
+                self.teleported = persisted || (currentGH != ch.geohash)
-                    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
-                }
             }
         }
     }

bitchat/ViewModels/ChatViewModel.swift

@@ -382,11 +382,6 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
     @Published var showBluetoothAlert = false
     @Published var bluetoothAlertMessage = ""
     @Published var bluetoothState: CBManagerState = .unknown
-
-    // Presentation state for privacy gating
-    @Published var isLocationChannelsSheetPresented: Bool = false
-    @Published var isAppInfoPresented: Bool = false
-    @Published var showScreenshotPrivacyWarning: Bool = false
     
     // Messages are naturally ephemeral - no persistent storage
     // Persist mesh public timeline across channel switches
@@ -591,11 +586,6 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                         if connected {
                             Task { @MainActor in
                                 self.resubscribeCurrentGeohash()
-                                // Re-init sampling for regional + bookmarked geohashes after reconnect
-                                let regional = LocationChannelManager.shared.availableChannels.map { $0.geohash }
-                                let bookmarks = GeohashBookmarksStore.shared.bookmarks
-                                let union = Array(Set(regional).union(bookmarks))
-                                self.beginGeohashSampling(for: union)
                             }
                         }
                     }
@@ -621,41 +611,21 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             self.switchLocationChannel(to: LocationChannelManager.shared.selectedChannel)
         }
 
-        // Background: keep sampling nearby geohashes + bookmarks for notifications even when sheet is closed
+        // Background: keep sampling nearby geohashes for notifications even when sheet is closed
         LocationChannelManager.shared.$availableChannels
             .receive(on: DispatchQueue.main)
             .sink { [weak self] channels in
                 guard let self = self else { return }
-                let regional = channels.map { $0.geohash }
+                let ghs = channels.map { $0.geohash }
-                let bookmarks = GeohashBookmarksStore.shared.bookmarks
-                let union = Array(Set(regional).union(bookmarks))
                 Task { @MainActor in
-                    self.beginGeohashSampling(for: union)
+                    self.beginGeohashSampling(for: ghs)
                 }
             }
             .store(in: &cancellables)
-
+        // Kick off initial sampling if we already have channels
-        // Also observe bookmark changes to update sampling
+        if !LocationChannelManager.shared.availableChannels.isEmpty {
-        GeohashBookmarksStore.shared.$bookmarks
+            let ghs = LocationChannelManager.shared.availableChannels.map { $0.geohash }
-            .receive(on: DispatchQueue.main)
+            Task { @MainActor in self.beginGeohashSampling(for: ghs) }
-            .sink { [weak self] bookmarks in
-                guard let self = self else { return }
-                let regional = LocationChannelManager.shared.availableChannels.map { $0.geohash }
-                let union = Array(Set(regional).union(bookmarks))
-                Task { @MainActor in
-                    self.beginGeohashSampling(for: union)
-                }
-            }
-            .store(in: &cancellables)
-
-        // Kick off initial sampling if we have regional channels or bookmarks
-        do {
-            let regional = LocationChannelManager.shared.availableChannels.map { $0.geohash }
-            let bookmarks = GeohashBookmarksStore.shared.bookmarks
-            let union = Array(Set(regional).union(bookmarks))
-            if !union.isEmpty {
-                Task { @MainActor in self.beginGeohashSampling(for: union) }
-            }
         }
         // Refresh channels once when authorized to seed sampling
         LocationChannelManager.shared.$permissionState
@@ -664,26 +634,6 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                 if state == .authorized { LocationChannelManager.shared.refreshChannels() }
             }
             .store(in: &cancellables)
-
-        // Track teleport flag changes to keep our own teleported marker in sync with regional status
-        LocationChannelManager.shared.$teleported
-            .receive(on: DispatchQueue.main)
-            .sink { [weak self] isTeleported in
-                guard let self = self else { return }
-                Task { @MainActor in
-                    guard case .location(let ch) = self.activeChannel,
-                          let id = try? NostrIdentityBridge.deriveIdentity(forGeohash: ch.geohash) else { return }
-                    let key = id.publicKeyHex.lowercased()
-                    let hasRegional = !LocationChannelManager.shared.availableChannels.isEmpty
-                    let inRegional = LocationChannelManager.shared.availableChannels.contains { $0.geohash == ch.geohash }
-                    if isTeleported && hasRegional && !inRegional {
-                        self.teleportedGeo = self.teleportedGeo.union([key])
-                    } else {
-                        self.teleportedGeo.remove(key)
-                    }
-                }
-            }
-            .store(in: &cancellables)
         
         // Request notification permission
         NotificationService.shared.requestAuthorization()
@@ -822,19 +772,10 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             })
             if hasTeleportTag {
                 let key = event.pubkey.lowercased()
-                // Do not mark our own key from historical events; rely on manager.teleported for self
+                Task { @MainActor in self.teleportedGeo = self.teleportedGeo.union([key]) }
-                let isSelf: Bool = {
-                    if let gh = self.currentGeohash, let my = try? NostrIdentityBridge.deriveIdentity(forGeohash: gh) {
-                        return my.publicKeyHex.lowercased() == key
-                    }
-                    return false
-                }()
-                if !isSelf {
-                    Task { @MainActor in self.teleportedGeo = self.teleportedGeo.union([key]) }
-                }
             }
             let senderName = self.displayNameForNostrPubkey(event.pubkey)
-            let content = event.content.trimmingCharacters(in: .whitespacesAndNewlines)
+            let content = event.content
             let timestamp = Date(timeIntervalSince1970: TimeInterval(event.created_at))
             let mentions = self.parseMentions(from: content)
             let msg = BitchatMessage(
@@ -1276,9 +1217,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
     ///         Routes to private chat if one is selected, otherwise broadcasts
     @MainActor
     func sendMessage(_ content: String) {
-        // Ignore messages that are empty or whitespace-only to prevent blank lines
+        guard !content.isEmpty else { return }
-        let trimmed = content.trimmingCharacters(in: .whitespacesAndNewlines)
-        guard !trimmed.isEmpty else { return }
         
         // Check for commands
         if content.hasPrefix("/") {
@@ -1298,7 +1237,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             } else {
             }
         } else {
-            // Parse mentions from the content (use original content for user intent)
+            // Parse mentions from the content
             let mentions = parseMentions(from: content)
             
             // Add message to local display
@@ -1313,7 +1252,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
 
             let message = BitchatMessage(
                 sender: displaySender,
-                content: trimmed,
+                content: content,
                 timestamp: Date(),
                 isRelay: false,
                 originalSender: nil,
@@ -1358,7 +1297,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                     do {
                         let identity = try NostrIdentityBridge.deriveIdentity(forGeohash: ch.geohash)
                         let event = try NostrProtocol.createEphemeralGeohashEvent(
-                            content: trimmed,
+                            content: content,
                             geohash: ch.geohash,
                             senderIdentity: identity,
                             nickname: self.nickname,
@@ -1378,10 +1317,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                         SecureLogger.log("GeoTeleport: sent geo message pub=\(identity.publicKeyHex.prefix(8))… teleported=\(LocationChannelManager.shared.teleported)",
                                         category: SecureLogger.session, level: .debug)
                         // If we tagged this as teleported, also mark our pubkey in teleportedGeo for UI
-                        // Only when not in our regional set (and regional list is known)
+                        if LocationChannelManager.shared.teleported {
-                        let hasRegional = !LocationChannelManager.shared.availableChannels.isEmpty
-                        let inRegional = LocationChannelManager.shared.availableChannels.contains { $0.geohash == ch.geohash }
-                        if LocationChannelManager.shared.teleported && hasRegional && !inRegional {
                             let key = identity.publicKeyHex.lowercased()
                             self.teleportedGeo = self.teleportedGeo.union([key])
                             SecureLogger.log("GeoTeleport: mark self teleported key=\(key.prefix(8))… total=\(self.teleportedGeo.count)",
@@ -1412,38 +1348,16 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
         switch channel {
         case .mesh:
             messages = meshTimeline
-            // Debug: log if any empty messages are present
-            let emptyMesh = messages.filter { $0.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty }.count
-            if emptyMesh > 0 {
-                SecureLogger.log("RenderGuard: mesh timeline contains \(emptyMesh) empty messages", category: SecureLogger.session, level: .debug)
-            }
             stopGeoParticipantsTimer()
             geohashPeople = []
             teleportedGeo.removeAll()
         case .location(let ch):
             // Sanitize existing timeline (filter any prior empty-content entries)
             var arr = geoTimelines[ch.geohash] ?? []
+            let before = arr.count
             arr.removeAll { $0.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty }
-            // Deduplicate by ID while preserving order (from oldest to newest)
+            if arr.count != before { geoTimelines[ch.geohash] = arr }
-            if arr.count > 1 {
-                var seen = Set<String>()
-                var dedup: [BitchatMessage] = []
-                for m in arr.sorted(by: { $0.timestamp < $1.timestamp }) {
-                    if !seen.contains(m.id) {
-                        dedup.append(m)
-                        seen.insert(m.id)
-                    }
-                }
-                arr = dedup
-            }
-            // Persist the cleaned/sorted timeline for this geohash
-            geoTimelines[ch.geohash] = arr
             messages = arr
-            // Debug: log if any empty messages are present post-sanitize
-            let emptyGeo = messages.filter { $0.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty }.count
-            if emptyGeo > 0 {
-                SecureLogger.log("RenderGuard: geohash \(ch.geohash) timeline has \(emptyGeo) empty messages after sanitize", category: SecureLogger.session, level: .debug)
-            }
         }
         // Unsubscribe previous
         if let sub = geoSubscriptionID {
@@ -1461,18 +1375,14 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
         
         guard case .location(let ch) = channel else { return }
         currentGeohash = ch.geohash
-        // Ensure self appears immediately in the people list; mark teleported state only when truly teleported
+        // Ensure self appears immediately in the people list; mark teleported state if applicable
         if let id = try? NostrIdentityBridge.deriveIdentity(forGeohash: ch.geohash) {
             self.recordGeoParticipant(pubkeyHex: id.publicKeyHex)
-            let hasRegional = !LocationChannelManager.shared.availableChannels.isEmpty
+            if LocationChannelManager.shared.teleported {
-            let inRegional = LocationChannelManager.shared.availableChannels.contains { $0.geohash == ch.geohash }
+                let key = id.publicKeyHex.lowercased()
-            let key = id.publicKeyHex.lowercased()
-            if LocationChannelManager.shared.teleported && hasRegional && !inRegional {
                 teleportedGeo = teleportedGeo.union([key])
                 SecureLogger.log("GeoTeleport: channel switch mark self teleported key=\(key.prefix(8))… total=\(teleportedGeo.count)",
                                 category: SecureLogger.session, level: .info)
-            } else {
-                teleportedGeo.remove(key)
             }
         }
         let subID = "geo-\(ch.geohash)"
@@ -1501,19 +1411,10 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             })
             if hasTeleportTag {
                 let key = event.pubkey.lowercased()
-                // Avoid marking our own key from historical events; rely on manager.teleported for self
+                Task { @MainActor in
-                let isSelf: Bool = {
+                    self.teleportedGeo = self.teleportedGeo.union([key])
-                    if let gh = self.currentGeohash, let my = try? NostrIdentityBridge.deriveIdentity(forGeohash: gh) {
+                    SecureLogger.log("GeoTeleport: mark peer teleported key=\(key.prefix(8))… total=\(self.teleportedGeo.count)",
-                        return my.publicKeyHex.lowercased() == key
+                                    category: SecureLogger.session, level: .info)
-                    }
-                    return false
-                }()
-                if !isSelf {
-                    Task { @MainActor in
-                        self.teleportedGeo = self.teleportedGeo.union([key])
-                        SecureLogger.log("GeoTeleport: mark peer teleported key=\(key.prefix(8))… total=\(self.teleportedGeo.count)",
-                                        category: SecureLogger.session, level: .info)
-                    }
                 }
             }
             // Skip only very recent self-echo from relay; include older self events for hydration
@@ -1865,27 +1766,17 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             NostrRelayManager.shared.subscribe(filter: filter, id: subID, relayUrls: subRelays) { [weak self] event in
                 guard let self = self else { return }
                 guard event.kind == NostrProtocol.EventKind.ephemeralEvent.rawValue else { return }
-                // Compute current participant count (5-minute window) BEFORE updating with this event
-                let cutoff = Date().addingTimeInterval(-TransportConfig.uiRecentCutoffFiveMinutesSeconds)
-                let existingCount: Int = {
-                    let map = self.geoParticipants[gh] ?? [:]
-                    return map.values.filter { $0 >= cutoff }.count
-                }()
                 // Update participants for this specific geohash
                 self.recordGeoParticipant(pubkeyHex: event.pubkey, geohash: gh)
-                // Notify only on rising-edge: previously zero people, now someone sends a chat
+                // Notify on new message activity in this geohash (sampling across channels)
                 let content = event.content.trimmingCharacters(in: .whitespacesAndNewlines)
                 guard !content.isEmpty else { return }
                 // Respect geohash blocks
                 if SecureIdentityStateManager.shared.isNostrBlocked(pubkeyHexLowercased: event.pubkey.lowercased()) { return }
                 // Skip self identity for this geohash
                 if let my = try? NostrIdentityBridge.deriveIdentity(forGeohash: gh), my.publicKeyHex.lowercased() == event.pubkey.lowercased() { return }
-                // Only trigger when there were zero participants in this geohash recently
-                guard existingCount == 0 else { return }
-                // Avoid notifications for old sampled events when launching or (re)subscribing
-                let eventTime = Date(timeIntervalSince1970: TimeInterval(event.created_at))
-                if Date().timeIntervalSince(eventTime) > 30 { return }
                 // Foreground policy: allow if it's a different geohash than the one currently open
+                // Suppress only when app is active AND we're already in this same geohash channel
                 #if os(iOS)
                 if UIApplication.shared.applicationState == .active {
                     if case .location(let ch) = self.activeChannel, ch.geohash == gh { return }
@@ -1908,30 +1799,6 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                 }()
                 Task { @MainActor in
                     self.lastGeoNotificationAt[gh] = now
-                    // Pre-populate the target geohash timeline so the triggering message appears when user opens it
-                    var arr = self.geoTimelines[gh] ?? []
-                    let senderSuffix = String(event.pubkey.suffix(4))
-                    let nick = self.geoNicknames[event.pubkey.lowercased()]
-                    let senderName = (nick?.isEmpty == false ? nick! : "anon") + "#" + senderSuffix
-                    let ts = Date(timeIntervalSince1970: TimeInterval(event.created_at))
-                    let mentions = self.parseMentions(from: content)
-                    let msg = BitchatMessage(
-                        id: event.id,
-                        sender: senderName,
-                        content: content,
-                        timestamp: ts,
-                        isRelay: false,
-                        originalSender: nil,
-                        isPrivate: false,
-                        recipientNickname: nil,
-                        senderPeerID: "nostr:\(event.pubkey.prefix(TransportConfig.nostrShortKeyDisplayLength))",
-                        mentions: mentions.isEmpty ? nil : mentions
-                    )
-                    if !arr.contains(where: { $0.id == msg.id }) {
-                        arr.append(msg)
-                        if arr.count > self.geoTimelineCap { arr = Array(arr.suffix(self.geoTimelineCap)) }
-                        self.geoTimelines[gh] = arr
-                    }
                     NotificationService.shared.sendGeohashActivityNotification(geohash: gh, bodyPreview: preview)
                 }
             }
@@ -2611,17 +2478,6 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
     
     @MainActor
     @objc private func userDidTakeScreenshot() {
-        // Respect privacy: do not broadcast screenshots taken from non-chat sheets
-        if isLocationChannelsSheetPresented {
-            // Show a warning about sharing location screenshots publicly
-            showScreenshotPrivacyWarning = true
-            return
-        }
-        if isAppInfoPresented {
-            // Silently ignore screenshots of app info
-            return
-        }
-
         // Send screenshot notification based on current context
         let screenshotMessage = "* \(nickname) took a screenshot *"
         
@@ -2641,7 +2497,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                 }
             }
             
-            // Show local notification immediately as system message (only in chat)
+            // Show local notification immediately as system message
             let localNotification = BitchatMessage(
                 sender: "system",
                 content: "you took a screenshot",
@@ -2692,7 +2548,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             }
             
 
-            // Show local notification immediately as system message (only in chat)
+            // Show local notification immediately as system message
             let localNotification = BitchatMessage(
                 sender: "system",
                 content: "you took a screenshot",
@@ -3077,10 +2933,8 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
         let mentionRegex = try? NSRegularExpression(pattern: mentionPattern, options: [])
         let hashtagRegex = try? NSRegularExpression(pattern: hashtagPattern, options: [])
         
-        let nsContent = contentText as NSString
+        let mentionMatches = mentionRegex?.matches(in: contentText, options: [], range: NSRange(location: 0, length: contentText.count)) ?? []
-        let nsLen = nsContent.length
+        let hashtagMatches = hashtagRegex?.matches(in: contentText, options: [], range: NSRange(location: 0, length: contentText.count)) ?? []
-        let mentionMatches = mentionRegex?.matches(in: contentText, options: [], range: NSRange(location: 0, length: nsLen)) ?? []
-        let hashtagMatches = hashtagRegex?.matches(in: contentText, options: [], range: NSRange(location: 0, length: nsLen)) ?? []
         
         // Combine and sort all matches
         var allMatches: [(range: NSRange, type: String)] = []
@@ -3097,14 +2951,12 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
         for (matchRange, matchType) in allMatches {
             // Add text before the match
             if let range = Range(matchRange, in: contentText) {
-                if lastEndIndex < range.lowerBound {
+                let beforeText = String(contentText[lastEndIndex..<range.lowerBound])
-                    let beforeText = String(contentText[lastEndIndex..<range.lowerBound])
+                if !beforeText.isEmpty {
-                    if !beforeText.isEmpty {
+                    var normalStyle = AttributeContainer()
-                        var normalStyle = AttributeContainer()
+                    normalStyle.font = .system(size: 14, design: .monospaced)
-                        normalStyle.font = .system(size: 14, design: .monospaced)
+                    normalStyle.foregroundColor = isDark ? Color.white : Color.black
-                        normalStyle.foregroundColor = isDark ? Color.white : Color.black
+                    processedContent.append(AttributedString(beforeText).mergingAttributes(normalStyle))
-                        processedContent.append(AttributedString(beforeText).mergingAttributes(normalStyle))
-                    }
                 }
                 
                 // Add the match with appropriate styling
@@ -3122,7 +2974,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                 
                 processedContent.append(AttributedString(matchText).mergingAttributes(matchStyle))
                 
-                if lastEndIndex < range.upperBound { lastEndIndex = range.upperBound }
+                lastEndIndex = range.upperBound
             }
         }
         
@@ -3199,12 +3051,9 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             
             // For extremely long content, render as plain text to avoid heavy regex/layout work,
             // unless the content includes Cashu tokens we want to chip-render below
-            // Compute NSString-backed length for regex/nsrange correctness with multi-byte characters
-            let nsContent = content as NSString
-            let nsLen = nsContent.length
             let containsCashuEarly: Bool = {
                 let rx = Regexes.quickCashuPresence
-                return rx.numberOfMatches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) > 0
+                return rx.numberOfMatches(in: content, options: [], range: NSRange(location: 0, length: content.count)) > 0
             }()
             if (content.count > 4000 || content.hasVeryLongToken(threshold: 1024)) && !containsCashuEarly {
                 var plainStyle = AttributeContainer()
@@ -3222,6 +3071,8 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             let lnurlRegex = Regexes.lnurl
             let lightningSchemeRegex = Regexes.lightningScheme
             let detector = Regexes.linkDetector
+            
+            let nsLen = content.count
             let hasMentionsHint = content.contains("@")
             let hasHashtagsHint = content.contains("#")
             let hasURLHint = content.contains("://") || content.contains("www.") || content.contains("http")
@@ -3301,19 +3152,17 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             for (range, type) in allMatches {
                 // Add text before match
                 if let nsRange = Range(range, in: content) {
-                    if lastEnd < nsRange.lowerBound {
+                    let beforeText = String(content[lastEnd..<nsRange.lowerBound])
-                        let beforeText = String(content[lastEnd..<nsRange.lowerBound])
+                    if !beforeText.isEmpty {
-                        if !beforeText.isEmpty {
+                        var beforeStyle = AttributeContainer()
-                            var beforeStyle = AttributeContainer()
+                        beforeStyle.foregroundColor = baseColor
-                            beforeStyle.foregroundColor = baseColor
+                        beforeStyle.font = isSelf
-                            beforeStyle.font = isSelf
+                            ? .system(size: 14, weight: .bold, design: .monospaced)
-                                ? .system(size: 14, weight: .bold, design: .monospaced)
+                            : .system(size: 14, design: .monospaced)
-                                : .system(size: 14, design: .monospaced)
+                        if isMentioned {
-                            if isMentioned {
+                            beforeStyle.font = beforeStyle.font?.bold()
-                                beforeStyle.font = beforeStyle.font?.bold()
-                            }
-                            result.append(AttributedString(beforeText).mergingAttributes(beforeStyle))
                         }
+                        result.append(AttributedString(beforeText).mergingAttributes(beforeStyle))
                     }
                     
                     // Add styled match
@@ -3421,10 +3270,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                             result.append(AttributedString(matchText).mergingAttributes(matchStyle))
                         }
                     }
-                    // Advance lastEnd safely in case of overlaps
+                    lastEnd = nsRange.upperBound
-                    if lastEnd < nsRange.upperBound {
-                        lastEnd = nsRange.upperBound
-                    }
                 }
             }
             
@@ -3522,23 +3368,19 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
             // Regular expression to find @mentions
             let pattern = "@([\\p{L}0-9_]+)"
             let regex = try? NSRegularExpression(pattern: pattern, options: [])
-            let nsContent = contentText as NSString
+            let matches = regex?.matches(in: contentText, options: [], range: NSRange(location: 0, length: contentText.count)) ?? []
-            let nsLen = nsContent.length
-            let matches = regex?.matches(in: contentText, options: [], range: NSRange(location: 0, length: nsLen)) ?? []
             
             var lastEndIndex = contentText.startIndex
             
             for match in matches {
                 // Add text before the mention
                 if let range = Range(match.range(at: 0), in: contentText) {
-                    if lastEndIndex < range.lowerBound {
+                    let beforeText = String(contentText[lastEndIndex..<range.lowerBound])
-                        let beforeText = String(contentText[lastEndIndex..<range.lowerBound])
+                    if !beforeText.isEmpty {
-                        if !beforeText.isEmpty {
+                        var normalStyle = AttributeContainer()
-                            var normalStyle = AttributeContainer()
+                        normalStyle.font = .system(size: 14, design: .monospaced)
-                            normalStyle.font = .system(size: 14, design: .monospaced)
+                        normalStyle.foregroundColor = isDark ? Color.white : Color.black
-                            normalStyle.foregroundColor = isDark ? Color.white : Color.black
+                        processedContent.append(AttributedString(beforeText).mergingAttributes(normalStyle))
-                            processedContent.append(AttributedString(beforeText).mergingAttributes(normalStyle))
-                        }
                     }
                     
                     // Add the mention with highlight
@@ -3548,7 +3390,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                     mentionStyle.foregroundColor = Color.orange
                     processedContent.append(AttributedString(mentionText).mergingAttributes(mentionStyle))
                     
-                    if lastEndIndex < range.upperBound { lastEndIndex = range.upperBound }
+                    lastEndIndex = range.upperBound
                 }
             }
             
@@ -4446,12 +4288,11 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
 
     func didReceivePublicMessage(from peerID: String, nickname: String, content: String, timestamp: Date) {
         Task { @MainActor in
-            let normalized = content.trimmingCharacters(in: .whitespacesAndNewlines)
+            let publicMentions = parseMentions(from: content)
-            let publicMentions = parseMentions(from: normalized)
             let msg = BitchatMessage(
                 id: UUID().uuidString,
                 sender: nickname,
-                content: normalized,
+                content: content,
                 timestamp: timestamp,
                 isRelay: false,
                 originalSender: nil,
@@ -4625,10 +4466,14 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                     self.meshService.isPeerConnected(peerID) || self.meshService.isPeerReachable(peerID)
                 }
                 
-                // Rising-edge only: previously zero peers, now > 0 peers
+                // Check if we have new mesh peers we haven't seen recently
                 let currentPeerSet = Set(meshPeers)
-                let hadNone = self.recentlySeenPeers.isEmpty
+                let newPeers = currentPeerSet.subtracting(self.recentlySeenPeers)
-                if meshPeers.count > 0 && hadNone && !self.hasNotifiedNetworkAvailable {
+                // Send notification if:
+                // 1. We have mesh peers (not just Nostr-only)
+                // 2. There are new peers we haven't seen (rising-edge)
+                // 3. We haven't already notified since the last sustained-empty period
+                if meshPeers.count > 0 && !newPeers.isEmpty && !self.hasNotifiedNetworkAvailable {
                     self.hasNotifiedNetworkAvailable = true
                     self.lastNetworkNotificationTime = Date()
                     self.recentlySeenPeers = currentPeerSet
@@ -4637,14 +4482,16 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
                                    category: SecureLogger.session, level: .info)
                 }
             } else {
-                // No peers — immediately reset to allow next rising-edge to notify
+                // No peers - schedule a graceful reset to avoid refiring on brief drops
-                self.hasNotifiedNetworkAvailable = false
+                if self.networkResetTimer == nil {
-                self.recentlySeenPeers.removeAll()
+                    self.networkResetTimer = Timer.scheduledTimer(withTimeInterval: self.networkResetGraceSeconds, repeats: false) { [weak self] _ in
-                if self.networkResetTimer != nil {
+                        guard let self = self else { return }
-                    self.networkResetTimer?.invalidate()
+                        self.hasNotifiedNetworkAvailable = false
-                    self.networkResetTimer = nil
+                        self.recentlySeenPeers.removeAll()
+                        self.networkResetTimer = nil
+                        SecureLogger.log("⏳ Mesh empty for \(Int(self.networkResetGraceSeconds))s — reset network notification state", category: SecureLogger.session, level: .debug)
+                    }
                 }
-                SecureLogger.log("⏳ Mesh empty — reset network notification state", category: SecureLogger.session, level: .debug)
             }
             
             // Register ephemeral sessions for all connected peers
@@ -4746,9 +4593,7 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
         // Allow optional disambiguation suffix '#abcd' for duplicate nicknames
         let pattern = "@([\\p{L}0-9_]+(?:#[a-fA-F0-9]{4})?)"
         let regex = try? NSRegularExpression(pattern: pattern, options: [])
-        let nsContent = content as NSString
+        let matches = regex?.matches(in: content, options: [], range: NSRange(location: 0, length: content.count)) ?? []
-        let nsLen = nsContent.length
-        let matches = regex?.matches(in: content, options: [], range: NSRange(location: 0, length: nsLen)) ?? []
         
         var mentions: [String] = []
         let peerNicknames = meshService.getPeerNicknames()
@@ -5815,12 +5660,9 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
         if isGeo && finalMessage.sender != "system" {
             if let gh = currentGeohash {
                 var arr = geoTimelines[gh] ?? []
-                // Dedup by message ID before appending to per-geohash timeline
+                arr.append(finalMessage)
-                if !arr.contains(where: { $0.id == finalMessage.id }) {
+                if arr.count > geoTimelineCap { arr = Array(arr.suffix(geoTimelineCap)) }
-                    arr.append(finalMessage)
+                geoTimelines[gh] = arr
-                    if arr.count > geoTimelineCap { arr = Array(arr.suffix(geoTimelineCap)) }
-                    geoTimelines[gh] = arr
-                }
             }
         }
 
@@ -5835,13 +5677,38 @@ class ChatViewModel: ObservableObject, BitchatDelegate {
 
         guard channelMatches else { return }
 
-        // Removed background nudge notification for generic "new chats!"
+        // Background nudge: notify on new activity after inactivity threshold in current channel
-
+        #if os(iOS)
-        // Append via batching buffer (skip empty content) with simple dedup by ID
+        if UIApplication.shared.applicationState != .active {
-        if !finalMessage.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
+            let channelKey: String = {
-            if !messages.contains(where: { $0.id == finalMessage.id }) {
+                switch activeChannel {
-                enqueuePublic(finalMessage)
+                case .mesh: return "mesh"
+                case .location(let ch): return "geo:\(ch.geohash)"
+                }
+            }()
+            let now = Date()
+            if let last = lastPublicActivityAt[channelKey], now.timeIntervalSince(last) >= channelInactivityThreshold {
+                // Optional: simple cooldown to avoid duplicate bursts
+                let lastNotified = lastPublicActivityNotifyAt[channelKey] ?? .distantPast
+                if now.timeIntervalSince(lastNotified) >= 60 {
+                    let title = activeChannelDisplayName()
+                    let body = "new chats!"
+                    if case .location(let ch) = activeChannel {
+                        // Attach deep link to open this geohash directly
+                        NotificationService.shared.sendGeohashActivityNotification(geohash: ch.geohash, titlePrefix: title + " ", bodyPreview: body)
+                    } else {
+                        NotificationService.shared.sendLocalNotification(title: title, body: body, identifier: "channel-activity-\(channelKey)-\(now.timeIntervalSince1970)")
+                    }
+                    lastPublicActivityNotifyAt[channelKey] = now
+                }
             }
+            lastPublicActivityAt[channelKey] = now
+        }
+        #endif
+
+        // Append via batching buffer (skip empty content)
+        if !finalMessage.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
+            enqueuePublic(finalMessage)
         }
     }
 

bitchat/Views/ContentView.swift

@@ -24,7 +24,6 @@ struct ContentView: View {
     
     @EnvironmentObject var viewModel: ChatViewModel
     @ObservedObject private var locationManager = LocationChannelManager.shared
-    @ObservedObject private var bookmarks = GeohashBookmarksStore.shared
     @State private var messageText = ""
     @State private var textFieldSelection: NSRange? = nil
     @FocusState private var isTextFieldFocused: Bool
@@ -165,8 +164,6 @@ struct ContentView: View {
         }
         .sheet(isPresented: $showAppInfo) {
             AppInfoView()
-                .onAppear { viewModel.isAppInfoPresented = true }
-                .onDisappear { viewModel.isAppInfoPresented = false }
         }
         .sheet(isPresented: Binding(
             get: { viewModel.showingFingerprintFor != nil },
@@ -281,10 +278,8 @@ struct ContentView: View {
                         }
                     }()
                     let items = windowedMessages.map { (uiID: "\(contextKey)|\($0.id)", message: $0) }
-                    // Filter out empty/whitespace-only messages to avoid blank rows
+                    
-                    let filteredItems = items.filter { !$0.message.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty }
+                    ForEach(items, id: \.uiID) { item in
-
-                    ForEach(filteredItems, id: \.uiID) { item in
                         let message = item.message
                         VStack(alignment: .leading, spacing: 0) {
                             // Check if current user is mentioned
@@ -464,13 +459,7 @@ struct ContentView: View {
                 }
                 let level = levelForLength(gh.count)
                 let ch = GeohashChannel(level: level, geohash: gh)
-                // Do not mark teleported when opening a geohash that is in our regional set.
+                LocationChannelManager.shared.markTeleported(for: gh, true)
-                // 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))
             }
             .onTapGesture(count: 3) {
@@ -1123,15 +1112,6 @@ 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 = {
@@ -1186,13 +1166,6 @@ struct ContentView: View {
         .padding(.horizontal, 12)
         .sheet(isPresented: $showLocationChannelsSheet) {
             LocationChannelsSheet(isPresented: $showLocationChannelsSheet)
-                .onAppear { viewModel.isLocationChannelsSheetPresented = true }
-                .onDisappear { viewModel.isLocationChannelsSheetPresented = false }
-        }
-        .alert("heads up", isPresented: $viewModel.showScreenshotPrivacyWarning) {
-            Button("ok", role: .cancel) {}
-        } message: {
-            Text("screenshots of location channels will reveal your location. think before sharing publicly.")
         }
         .background(backgroundColor.opacity(0.95))
     }

bitchat/Views/LocationChannelsSheet.swift

@@ -8,7 +8,6 @@ import AppKit
 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 = ""
@@ -99,7 +98,7 @@ struct LocationChannelsSheet: View {
 
     private var channelList: some View {
         List {
-            // Mesh option first (no bookmark)
+            // Mesh option first
             channelRow(title: meshTitleWithCount(), subtitlePrefix: "#bluetooth • \(bluetoothRangeString())", isSelected: isMeshSelected, titleColor: standardBlue, titleBold: meshCount() > 0) {
                 manager.select(ChannelID.mesh)
                 isPresented = false
@@ -113,21 +112,7 @@ 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(
+                    channelRow(title: geohashTitleWithCount(for: channel), subtitlePrefix: subtitlePrefix, subtitleName: namePart, isSelected: isSelected(channel), titleBold: highlight) {
-                        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))
@@ -203,48 +188,6 @@ 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: {
@@ -277,24 +220,14 @@ struct LocationChannelsSheet: View {
         return false
     }
 
-    @ViewBuilder
+    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 {
-    private func channelRow(
+        Button(action: action) {
-        title: String,
+            HStack {
-        subtitlePrefix: String,
+                VStack(alignment: .leading) {
-        subtitleName: String? = nil,
+                    // Render title with smaller font for trailing count in parentheses
-        subtitleNameBold: Bool = false,
+                    let parts = splitTitleAndCount(title)
-        isSelected: Bool,
+                    HStack(spacing: 4) {
-        titleColor: Color? = nil,
+                        Text(parts.base)
-        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)
@@ -304,17 +237,20 @@ struct LocationChannelsSheet: View {
                                 .foregroundColor(.secondary)
                         }
                     }
-                let subtitleFull: String = {
+                    HStack(spacing: 0) {
-                    if let name = subtitleName, !name.isEmpty {
+                        Text(subtitlePrefix)
-                        return subtitlePrefix + " • " + name
+                            .font(.system(size: 12, design: .monospaced))
+                            .foregroundColor(.secondary)
+                        if let name = subtitleName {
+                            Text(" • ")
+                                .font(.system(size: 12, design: .monospaced))
+                                .foregroundColor(.secondary)
+                            Text(name)
+                                .font(.system(size: 12, design: .monospaced))
+                                .fontWeight(subtitleNameBold ? .bold : .regular)
+                                .foregroundColor(.secondary)
+                        }
                     }
-                    return subtitlePrefix
-                }()
-                Text(subtitleFull)
-                    .font(.system(size: 12, design: .monospaced))
-                    .foregroundColor(.secondary)
-                    .lineLimit(1)
-                    .truncationMode(.tail)
                 }
                 Spacer()
                 if isSelected {
@@ -322,11 +258,11 @@ 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]"
@@ -355,19 +291,12 @@ struct LocationChannelsSheet: View {
     }
 
     private func geohashTitleWithCount(for channel: GeohashChannel) -> String {
-        // Main list: keep level labels (block/neighborhood/city/province/region)
+        // Use ViewModel's 5-minute activity counts; may be 0 for non-selected channels
         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 }

bitchatTests/GeohashBookmarksStoreTests.swift

@@ -1,51 +0,0 @@
-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"))
-    }
-}