feat: Add compass and region support

feat: Add repeater discovery onboarding flow

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## 2026-03-15 to 2026-03-22
+
+- Device connectivity and routing: added Android USB serial companion support, serial compass support, GPS module controls, per-contact path size selection, and favourites support via firmware flags.
+- Location and map intelligence: added RSSI-based repeater trilateration and contact location estimates, isolated MET history, matched the official advert import/discovery flow, and refreshed map presentation by removing contact trails.
+- Telemetry and device info: surfaced self telemetry and sensor defaults, opened device info from signal and battery taps, improved signal chip behavior, fixed duplicate telemetry delivery, and restored telemetry refresh behavior.
+- Contacts and messaging: added meshcore:// contact sharing and repeater neighbour views, supported MeshCore message links, fixed DM retry behavior, corrected room poster naming, and compacted the recipient selector.
+- UI polish and platform upkeep: improved device settings layout, tightened sensor and contact presentation, expanded localization coverage, and refreshed platform dependencies and build numbers.
+
+## Key PRs
+
+- [#26](https://github.com/dz0ny/meshcore-sar/pull/26) Merge pull request #26 from `dz0ny/feat/sensor-telemetry-preview`
+
 ## 2026-03-08 to 2026-03-14
 
 - Discovery and contacts: finished the discovery flow, removed artificial UI delays, added profile storage and sync, and allowed contact name overrides.

lib/l10n/app_en.arb

@@ -2285,7 +2285,7 @@
   "@change": {
     "description": "Generic change action"
   },
-  "wizardOverviewDescription": "This app combines MeshCore messaging, SAR field updates, mapping, and device tools in one place.",
+  "wizardOverviewDescription": "This app combines MeshCore messaging, SAR field updates, discovery, mapping, and device tools in one place.",
   "@wizardOverviewDescription": {
     "description": "Updated onboarding overview description"
   },
@@ -2297,7 +2297,7 @@
   "@wizardOverviewFeature2": {
     "description": "Updated onboarding overview feature 2"
   },
-  "wizardOverviewFeature3": "Connect over BLE or TCP, then manage the companion radio from inside the app.",
+  "wizardOverviewFeature3": "Connect over BLE, WiFi, or Serial, then manage the companion radio from inside the app.",
   "@wizardOverviewFeature3": {
     "description": "Updated onboarding overview feature 3"
   },
@@ -2410,11 +2410,11 @@
   "@wizardNetworkTitle": {
     "description": "Updated onboarding network page title"
   },
-  "wizardNetworkDescription": "The Contacts tab organizes the network you discover and the routes you learn over time.",
+  "wizardNetworkDescription": "The Contacts and Discovery flows help you find nearby nodes, store repeaters, and manage the routes you learn over time.",
   "@wizardNetworkDescription": {
     "description": "Updated onboarding network page description"
   },
-  "wizardNetworkFeature1": "Review team members, repeaters, rooms, channels, and pending adverts in one list.",
+  "wizardNetworkFeature1": "Discover repeaters and sensors, then review team members, rooms, channels, and pending adverts in one list.",
   "@wizardNetworkFeature1": {
     "description": "Updated onboarding network feature 1"
   },
@@ -2422,7 +2422,7 @@
   "@wizardNetworkFeature2": {
     "description": "Updated onboarding network feature 2"
   },
-  "wizardNetworkFeature3": "Create channels and manage network destinations without leaving the app.",
+  "wizardNetworkFeature3": "Add new repeaters right after you connect, then create channels and manage network destinations without leaving the app.",
   "@wizardNetworkFeature3": {
     "description": "Updated onboarding network feature 3"
   },
@@ -2462,10 +2462,18 @@
   "@wizardToolsFeature2": {
     "description": "Updated onboarding tools feature 2"
   },
-  "wizardToolsFeature3": "Use packet logs, spectrum scan, and developer diagnostics when troubleshooting the mesh.",
+  "wizardToolsFeature3": "Use live traffic, packet logs, spectrum scan, and developer diagnostics when troubleshooting the mesh.",
   "@wizardToolsFeature3": {
     "description": "Updated onboarding tools feature 3"
   },
+  "postConnectDiscoveryTitle": "Discover repeaters now?",
+  "@postConnectDiscoveryTitle": {
+    "description": "Title for the prompt shown after a successful device connection"
+  },
+  "postConnectDiscoveryDescription": "Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.",
+  "@postConnectDiscoveryDescription": {
+    "description": "Body text for the prompt shown after a successful device connection"
+  },
   "contactInSensors": "In Sensors",
   "@contactInSensors": {
     "description": "Contact actions label when already in sensors"
@@ -2770,5 +2778,24 @@
   "captured": "Captured",
   "size": "Size",
   "noCustomChannelsToClear": "No custom channels to clear.",
-  "noDeviceContactsToClear": "No device contacts to clear."
+  "noDeviceContactsToClear": "No device contacts to clear.",
+
+  "setRegionScope": "Set region scope",
+  "regionScope": "Region scope",
+  "regionScopeNone": "None (global)",
+  "clearRegionScope": "Clear scope",
+  "regionScopeWarning": "Only repeaters allowing this region will forward.",
+  "discoverRegions": "Discover from repeaters",
+  "discoveringRegions": "Discovering regions...",
+  "enterRegionName": "Region name (e.g. auckland)",
+  "noRegionsFound": "No regions found on this repeater.",
+  "regionScopeSet": "Region scope set to {name}",
+  "@regionScopeSet": {
+    "placeholders": {
+      "name": {
+        "type": "String"
+      }
+    }
+  },
+  "regionScopeCleared": "Region scope cleared"
 }

lib/l10n/app_localizations.dart

@@ -3219,7 +3219,7 @@ abstract class AppLocalizations {
   /// Updated onboarding overview description
   ///
   /// In en, this message translates to:
-  /// **'This app combines MeshCore messaging, SAR field updates, mapping, and device tools in one place.'**
+  /// **'This app combines MeshCore messaging, SAR field updates, discovery, mapping, and device tools in one place.'**
   String get wizardOverviewDescription;
 
   /// Updated onboarding overview feature 1
@@ -3237,7 +3237,7 @@ abstract class AppLocalizations {
   /// Updated onboarding overview feature 3
   ///
   /// In en, this message translates to:
-  /// **'Connect over BLE or TCP, then manage the companion radio from inside the app.'**
+  /// **'Connect over BLE, WiFi, or Serial, then manage the companion radio from inside the app.'**
   String get wizardOverviewFeature3;
 
   /// Updated onboarding messaging page title
@@ -3387,13 +3387,13 @@ abstract class AppLocalizations {
   /// Updated onboarding network page description
   ///
   /// In en, this message translates to:
-  /// **'The Contacts tab organizes the network you discover and the routes you learn over time.'**
+  /// **'The Contacts and Discovery flows help you find nearby nodes, store repeaters, and manage the routes you learn over time.'**
   String get wizardNetworkDescription;
 
   /// Updated onboarding network feature 1
   ///
   /// In en, this message translates to:
-  /// **'Review team members, repeaters, rooms, channels, and pending adverts in one list.'**
+  /// **'Discover repeaters and sensors, then review team members, rooms, channels, and pending adverts in one list.'**
   String get wizardNetworkFeature1;
 
   /// Updated onboarding network feature 2
@@ -3405,7 +3405,7 @@ abstract class AppLocalizations {
   /// Updated onboarding network feature 3
   ///
   /// In en, this message translates to:
-  /// **'Create channels and manage network destinations without leaving the app.'**
+  /// **'Add new repeaters right after you connect, then create channels and manage network destinations without leaving the app.'**
   String get wizardNetworkFeature3;
 
   /// Updated onboarding map page title
@@ -3465,9 +3465,21 @@ abstract class AppLocalizations {
   /// Updated onboarding tools feature 3
   ///
   /// In en, this message translates to:
-  /// **'Use packet logs, spectrum scan, and developer diagnostics when troubleshooting the mesh.'**
+  /// **'Use live traffic, packet logs, spectrum scan, and developer diagnostics when troubleshooting the mesh.'**
   String get wizardToolsFeature3;
 
+  /// Title for the prompt shown after a successful device connection
+  ///
+  /// In en, this message translates to:
+  /// **'Discover repeaters now?'**
+  String get postConnectDiscoveryTitle;
+
+  /// Body text for the prompt shown after a successful device connection
+  ///
+  /// In en, this message translates to:
+  /// **'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.'**
+  String get postConnectDiscoveryDescription;
+
   /// Contact actions label when already in sensors
   ///
   /// In en, this message translates to:
@@ -4997,6 +5009,72 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'No device contacts to clear.'**
   String get noDeviceContactsToClear;
+
+  /// No description provided for @setRegionScope.
+  ///
+  /// In en, this message translates to:
+  /// **'Set region scope'**
+  String get setRegionScope;
+
+  /// No description provided for @regionScope.
+  ///
+  /// In en, this message translates to:
+  /// **'Region scope'**
+  String get regionScope;
+
+  /// No description provided for @regionScopeNone.
+  ///
+  /// In en, this message translates to:
+  /// **'None (global)'**
+  String get regionScopeNone;
+
+  /// No description provided for @clearRegionScope.
+  ///
+  /// In en, this message translates to:
+  /// **'Clear scope'**
+  String get clearRegionScope;
+
+  /// No description provided for @regionScopeWarning.
+  ///
+  /// In en, this message translates to:
+  /// **'Only repeaters allowing this region will forward.'**
+  String get regionScopeWarning;
+
+  /// No description provided for @discoverRegions.
+  ///
+  /// In en, this message translates to:
+  /// **'Discover from repeaters'**
+  String get discoverRegions;
+
+  /// No description provided for @discoveringRegions.
+  ///
+  /// In en, this message translates to:
+  /// **'Discovering regions...'**
+  String get discoveringRegions;
+
+  /// No description provided for @enterRegionName.
+  ///
+  /// In en, this message translates to:
+  /// **'Region name (e.g. auckland)'**
+  String get enterRegionName;
+
+  /// No description provided for @noRegionsFound.
+  ///
+  /// In en, this message translates to:
+  /// **'No regions found on this repeater.'**
+  String get noRegionsFound;
+
+  /// No description provided for @regionScopeSet.
+  ///
+  /// In en, this message translates to:
+  /// **'Region scope set to {name}'**
+  String regionScopeSet(String name);
+
+  /// No description provided for @regionScopeCleared.
+  ///
+  /// In en, this message translates to:
+  /// **'Region scope cleared'**
+  String get regionScopeCleared;
 }
 
 class _AppLocalizationsDelegate

lib/l10n/app_localizations_de.dart

@@ -1898,6 +1898,13 @@ class AppLocalizationsDe extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Nutze Paketprotokolle, Spektrumsuche und Entwicklerdiagnosen zur Fehlersuche im Mesh.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'In Sensoren';
 
@@ -2698,4 +2705,40 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get noDeviceContactsToClear => 'Keine Gerätekontakte zum Löschen.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_el.dart

@@ -1905,6 +1905,13 @@ class AppLocalizationsEl extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Χρησιμοποιήστε καταγραφές πακέτων, σάρωση φάσματος και διαγνωστικά προγραμματιστή κατά την αντιμετώπιση προβλημάτων του mesh.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'Στους αισθητήρες';
 
@@ -2700,4 +2707,40 @@ class AppLocalizationsEl extends AppLocalizations {
 
   @override
   String get noDeviceContactsToClear => 'Δεν υπάρχουν επαφές συσκευής.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_en.dart

@@ -1717,7 +1717,7 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get wizardOverviewDescription =>
-      'This app combines MeshCore messaging, SAR field updates, mapping, and device tools in one place.';
+      'This app combines MeshCore messaging, SAR field updates, discovery, mapping, and device tools in one place.';
 
   @override
   String get wizardOverviewFeature1 =>
@@ -1729,7 +1729,7 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get wizardOverviewFeature3 =>
-      'Connect over BLE or TCP, then manage the companion radio from inside the app.';
+      'Connect over BLE, WiFi, or Serial, then manage the companion radio from inside the app.';
 
   @override
   String get wizardMessagingTitle => 'Messaging and Field Reports';
@@ -1819,11 +1819,11 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get wizardNetworkDescription =>
-      'The Contacts tab organizes the network you discover and the routes you learn over time.';
+      'The Contacts and Discovery flows help you find nearby nodes, store repeaters, and manage the routes you learn over time.';
 
   @override
   String get wizardNetworkFeature1 =>
-      'Review team members, repeaters, rooms, channels, and pending adverts in one list.';
+      'Discover repeaters and sensors, then review team members, rooms, channels, and pending adverts in one list.';
 
   @override
   String get wizardNetworkFeature2 =>
@@ -1831,7 +1831,7 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get wizardNetworkFeature3 =>
-      'Create channels and manage network destinations without leaving the app.';
+      'Add new repeaters right after you connect, then create channels and manage network destinations without leaving the app.';
 
   @override
   String get wizardMapOpsTitle => 'Map, Trails, and Shared Geometry';
@@ -1869,7 +1869,14 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get wizardToolsFeature3 =>
-      'Use packet logs, spectrum scan, and developer diagnostics when troubleshooting the mesh.';
+      'Use live traffic, packet logs, spectrum scan, and developer diagnostics when troubleshooting the mesh.';
+
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
 
   @override
   String get contactInSensors => 'In Sensors';
@@ -2662,4 +2669,40 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get noDeviceContactsToClear => 'No device contacts to clear.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_es.dart

@@ -1901,6 +1901,13 @@ class AppLocalizationsEs extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Usa registros de paquetes, escaneo de espectro y diagnósticos de desarrollador al solucionar problemas de la malla.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'En Sensores';
 
@@ -2702,4 +2709,40 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get noDeviceContactsToClear =>
       'No hay contactos del dispositivo que borrar.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_fr.dart

@@ -1905,6 +1905,13 @@ class AppLocalizationsFr extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Utilisez les journaux de paquets, le balayage du spectre et les diagnostics développeur pour dépanner le réseau maillé.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'Dans Capteurs';
 
@@ -2706,4 +2713,40 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get noDeviceContactsToClear =>
       'Aucun contact de l\'appareil à effacer.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_hr.dart

@@ -1881,6 +1881,13 @@ class AppLocalizationsHr extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Koristite zapisnike paketa, skeniranje spektra i razvojnu dijagnostiku pri rješavanju problema s mesh mrežom.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'U Senzorima';
 
@@ -2675,4 +2682,40 @@ class AppLocalizationsHr extends AppLocalizations {
 
   @override
   String get noDeviceContactsToClear => 'Nema kontakata uređaja za brisanje.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_it.dart

@@ -1896,6 +1896,13 @@ class AppLocalizationsIt extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Usa log dei pacchetti, scansione dello spettro e diagnostica sviluppatore per risolvere problemi della mesh.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'Nei Sensori';
 
@@ -2692,4 +2699,40 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get noDeviceContactsToClear =>
       'Nessun contatto dispositivo da cancellare.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_pl.dart

@@ -1893,6 +1893,13 @@ class AppLocalizationsPl extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Używaj logów pakietów, skanowania widma i diagnostyki deweloperskiej podczas rozwiązywania problemów z mesh.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'W Czujnikach';
 
@@ -2689,4 +2696,40 @@ class AppLocalizationsPl extends AppLocalizations {
   @override
   String get noDeviceContactsToClear =>
       'Brak kontaktów urządzenia do wyczyszczenia.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_pt.dart

@@ -1900,6 +1900,13 @@ class AppLocalizationsPt extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Use logs de pacotes, varredura de espectro e diagnóstico de desenvolvedor ao solucionar problemas da malha.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'Nos Sensores';
 
@@ -2700,4 +2707,40 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get noDeviceContactsToClear =>
       'Sem contactos do dispositivo para limpar.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_ru.dart

@@ -1890,6 +1890,13 @@ class AppLocalizationsRu extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Используйте журналы пакетов, сканирование спектра и диагностику разработчика для устранения проблем mesh-сети.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'В датчиках';
 
@@ -2685,4 +2692,40 @@ class AppLocalizationsRu extends AppLocalizations {
 
   @override
   String get noDeviceContactsToClear => 'Нет контактов устройства для очистки.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_sl.dart

@@ -1881,6 +1881,13 @@ class AppLocalizationsSl extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Uporabite dnevnik paketov, pregled spektra in razvojno diagnostiko pri odpravljanju težav v mesh omrežju.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'V senzorjih';
 
@@ -2675,4 +2682,40 @@ class AppLocalizationsSl extends AppLocalizations {
 
   @override
   String get noDeviceContactsToClear => 'Ni stikov naprave za brisanje.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_tr.dart

@@ -1883,6 +1883,13 @@ class AppLocalizationsTr extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Mesh sorunlarını giderirken paket günlükleri, spektrum taraması ve geliştirici tanılamalarını kullanın.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'Sensörlerde';
 
@@ -2673,4 +2680,40 @@ class AppLocalizationsTr extends AppLocalizations {
 
   @override
   String get noDeviceContactsToClear => 'Temizlenecek cihaz kişisi yok.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_uk.dart

@@ -1896,6 +1896,13 @@ class AppLocalizationsUk extends AppLocalizations {
   String get wizardToolsFeature3 =>
       'Використовуйте журнали пакетів, сканування спектра та діагностику розробника для усунення проблем mesh-мережі.';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => 'У датчиках';
 
@@ -2696,4 +2703,40 @@ class AppLocalizationsUk extends AppLocalizations {
   @override
   String get noDeviceContactsToClear =>
       'Немає контактів пристрою для очищення.';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/app_localizations_zh.dart

@@ -1796,6 +1796,13 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get wizardToolsFeature3 => '在排查 mesh 网络问题时使用数据包日志、频谱扫描和开发者诊断。';
 
+  @override
+  String get postConnectDiscoveryTitle => 'Discover repeaters now?';
+
+  @override
+  String get postConnectDiscoveryDescription =>
+      'Run repeater discovery right after connecting so you can see nearby MeshCore nodes and add them to your network faster.';
+
   @override
   String get contactInSensors => '在传感器中';
 
@@ -2568,4 +2575,40 @@ class AppLocalizationsZh extends AppLocalizations {
 
   @override
   String get noDeviceContactsToClear => '没有设备联系人可清除。';
+
+  @override
+  String get setRegionScope => 'Set region scope';
+
+  @override
+  String get regionScope => 'Region scope';
+
+  @override
+  String get regionScopeNone => 'None (global)';
+
+  @override
+  String get clearRegionScope => 'Clear scope';
+
+  @override
+  String get regionScopeWarning =>
+      'Only repeaters allowing this region will forward.';
+
+  @override
+  String get discoverRegions => 'Discover from repeaters';
+
+  @override
+  String get discoveringRegions => 'Discovering regions...';
+
+  @override
+  String get enterRegionName => 'Region name (e.g. auckland)';
+
+  @override
+  String get noRegionsFound => 'No regions found on this repeater.';
+
+  @override
+  String regionScopeSet(String name) {
+    return 'Region scope set to $name';
+  }
+
+  @override
+  String get regionScopeCleared => 'Region scope cleared';
 }

lib/l10n/untranslated.json

@@ -1 +1,209 @@
-{}
+{
+  "de": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "el": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "es": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "fr": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "hr": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "it": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "pl": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "pt": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "ru": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "sl": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "tr": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "uk": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ],
+
+  "zh": [
+    "postConnectDiscoveryTitle",
+    "postConnectDiscoveryDescription",
+    "setRegionScope",
+    "regionScope",
+    "regionScopeNone",
+    "clearRegionScope",
+    "regionScopeWarning",
+    "discoverRegions",
+    "discoveringRegions",
+    "enterRegionName",
+    "noRegionsFound",
+    "regionScopeSet",
+    "regionScopeCleared"
+  ]
+}

lib/models/config_profile.dart

@@ -263,7 +263,6 @@ class MapWorkspaceProfileSection {
   final bool? showKrasFireZonesOverlay;
   final bool? showPlaceNamesOverlay;
   final bool? showMunicipalityBordersOverlay;
-  final bool? showAllContactTrails;
   final bool? hideRepeatersOnMap;
 
   const MapWorkspaceProfileSection({
@@ -284,7 +283,6 @@ class MapWorkspaceProfileSection {
     this.showKrasFireZonesOverlay,
     this.showPlaceNamesOverlay,
     this.showMunicipalityBordersOverlay,
-    this.showAllContactTrails,
     this.hideRepeatersOnMap,
   });
 
@@ -306,7 +304,6 @@ class MapWorkspaceProfileSection {
       showKrasFireZonesOverlay == null &&
       showPlaceNamesOverlay == null &&
       showMunicipalityBordersOverlay == null &&
-      showAllContactTrails == null &&
       hideRepeatersOnMap == null;
 
   Map<String, dynamic> toJson() => {
@@ -327,7 +324,6 @@ class MapWorkspaceProfileSection {
     'showKrasFireZonesOverlay': showKrasFireZonesOverlay,
     'showPlaceNamesOverlay': showPlaceNamesOverlay,
     'showMunicipalityBordersOverlay': showMunicipalityBordersOverlay,
-    'showAllContactTrails': showAllContactTrails,
     'hideRepeatersOnMap': hideRepeatersOnMap,
   };
 
@@ -356,7 +352,6 @@ class MapWorkspaceProfileSection {
       showPlaceNamesOverlay: json['showPlaceNamesOverlay'] as bool?,
       showMunicipalityBordersOverlay:
           json['showMunicipalityBordersOverlay'] as bool?,
-      showAllContactTrails: json['showAllContactTrails'] as bool?,
       hideRepeatersOnMap: json['hideRepeatersOnMap'] as bool?,
     );
   }

lib/providers/app_provider.dart

@@ -2,7 +2,8 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:math' as math;
 import 'package:flutter/foundation.dart';
-import 'package:meshcore_client/meshcore_client.dart' show BufferReader;
+import 'package:meshcore_client/meshcore_client.dart'
+    show BufferReader, MeshCoreConstants;
 import 'package:shared_preferences/shared_preferences.dart';
 import 'connection_provider.dart';
 import 'contacts_provider.dart';
@@ -211,6 +212,8 @@ class AppProvider with ChangeNotifier {
   static const int _maxPacketRetryAttempts = 4;
   final Map<String, String> _voiceSessionSenderKey6 = {};
   final Map<String, String> _imageSessionSenderKey6 = {};
+  final Map<String, Map<int, VoicePacket>> _pendingChannelVoicePackets = {};
+  final Map<String, Map<int, ImagePacket>> _pendingChannelImageFragments = {};
   final Map<String, Timer> _voiceMissingRetryTimers = {};
   final Map<String, int> _voiceMissingRetryAttempts = {};
   final Map<String, Timer> _imageMissingRetryTimers = {};
@@ -1315,6 +1318,7 @@ class AppProvider with ChangeNotifier {
               .toLowerCase();
         }
         voiceProvider.registerEnvelope(voiceEnvelope);
+        _replayPendingChannelVoicePackets(voiceEnvelope.sessionId);
         enrichedMessage = enrichedMessage.copyWith(
           isVoice: true,
           voiceId: voiceEnvelope.sessionId,
@@ -1352,6 +1356,7 @@ class AppProvider with ChangeNotifier {
               .toLowerCase();
         }
         imageProvider.registerEnvelope(imageEnvelope);
+        _replayPendingChannelImageFragments(imageEnvelope.sessionId);
         messagesProvider.addMessage(
           enrichedMessage,
           contactLookup: (name) {
@@ -1469,15 +1474,7 @@ class AppProvider with ChangeNotifier {
         return;
       }
 
-      final fastGpsPacket = FastGpsPacket.tryParseBinary(payload);
-      if (fastGpsPacket != null) {
-        final sender = _resolveContactByPrefixHex(fastGpsPacket.senderKey6);
-        if (sender != null) {
-          contactsProvider.updateFastGps(
-            sender.publicKey.sublist(0, 6),
-            fastGpsPacket,
-          );
-        }
+      if (_handleFastGpsPayload(payload)) {
         return;
       }
 
@@ -1614,66 +1611,44 @@ class AppProvider with ChangeNotifier {
         return;
       }
 
-      if (ImagePacket.isImageBinary(payload)) {
-        final frag = ImagePacket.tryParseBinary(payload);
-        if (frag == null) return;
-        debugPrint('📷 [AppProvider] Binary image fragment received: $frag');
-        final session = imageProvider.session(frag.sessionId);
-        if (session == null && frag.total < 1) {
-          debugPrint(
-            '⚠️ [AppProvider] Dropping compact image fragment without envelope '
-            'for session ${frag.sessionId}',
-          );
-          return;
-        }
-        imageProvider.addFragment(
-          session == null
-              ? frag
-              : ImagePacket(
-                  sessionId: frag.sessionId,
-                  format: session.format,
-                  index: frag.index,
-                  total: session.total,
-                  data: frag.data,
-                ),
-          width: session?.width ?? 0,
-          height: session?.height ?? 0,
-        );
-        _scheduleImageMissingRetry(
-          frag.sessionId,
-          justComplete: imageProvider.isComplete(frag.sessionId),
-        );
+      if (_handleIncomingImageBinaryPayload(payload)) {
         return;
       }
-
-      if (!VoicePacket.isVoiceBinary(payload)) return;
-      final pkt = VoicePacket.tryParseBinary(payload);
-      if (pkt == null) return;
-      debugPrint('🎙️ [AppProvider] Binary voice packet received: $pkt');
-      final session = voiceProvider.session(pkt.sessionId);
-      if (session == null && pkt.total < 1) {
-        debugPrint(
-          '⚠️ [AppProvider] Dropping compact voice packet without envelope '
-          'for session ${pkt.sessionId}',
-        );
-        return;
-      }
-      final justComplete = voiceProvider.addPacket(
-        session == null
-            ? pkt
-            : VoicePacket(
-                sessionId: pkt.sessionId,
-                mode: session.mode,
-                index: pkt.index,
-                total: session.total,
-                codec2Data: pkt.codec2Data,
-              ),
-      );
-      _scheduleVoiceMissingRetry(pkt.sessionId, justComplete: justComplete);
-      // Insert or update the placeholder message in the chat list
-      _handleIncomingVoicePacket(pkt, justComplete: justComplete);
+      _handleIncomingVoiceBinaryPayload(payload);
     };
 
+    connectionProvider.onChannelDataReceived =
+        (channelIdx, pathLen, dataType, payload, snrRaw, rssiDbm) {
+          if (dataType != MeshCoreConstants.dataTypeDev) {
+            debugPrint(
+              '📦 [AppProvider] Ignoring channel datagram type '
+              '0x${dataType.toRadixString(16).padLeft(4, '0')} on channel $channelIdx',
+            );
+            return;
+          }
+
+          if (_handleFastGpsPayload(payload)) {
+            return;
+          }
+          if (_handleIncomingImageBinaryPayload(
+            payload,
+            allowPreEnvelopeBuffer: true,
+          )) {
+            return;
+          }
+          if (_handleIncomingVoiceBinaryPayload(
+            payload,
+            allowPreEnvelopeBuffer: true,
+          )) {
+            return;
+          }
+
+          debugPrint(
+            '📦 [AppProvider] Unknown developer channel payload on channel '
+            '$channelIdx: ${payload.isNotEmpty ? payload.first : -1}',
+          );
+        };
+
     connectionProvider.onControlDataReceived =
         (payload, snrRaw, rssiDbm, pathLen) {
           _handleControlDataDiscovery(
@@ -2805,6 +2780,23 @@ class AppProvider with ChangeNotifier {
       return;
     }
 
+    final channelIdx = locationTrackingService.fastLocationChannelIdx;
+    if (channelIdx == null) {
+      return;
+    }
+
+    final hasTargetChannel = contactsProvider.channels.any(
+      (channel) =>
+          (channel.publicKey.length > 1 ? channel.publicKey[1] : 0) ==
+          channelIdx,
+    );
+    if (!hasTargetChannel) {
+      debugPrint(
+        '⚠️ [AppProvider] Fast GPS target channel $channelIdx is unavailable',
+      );
+      return;
+    }
+
     final publicKey = connectionProvider.deviceInfo.publicKey;
     if (publicKey == null || publicKey.length < 6) {
       return;
@@ -2822,10 +2814,14 @@ class AppProvider with ChangeNotifier {
     );
     debugPrint(
       '📍 [AppProvider] Sending fast GPS update ($reason): '
-      '${position.latitude}, ${position.longitude}',
+      '${position.latitude}, ${position.longitude} via channel $channelIdx',
     );
     try {
-      await connectionProvider.sendRawPrivateMulticast(packet.encodeBinary());
+      await connectionProvider.sendChannelData(
+        channelIdx: channelIdx,
+        dataType: MeshCoreConstants.dataTypeDev,
+        payload: packet.encodeBinary(),
+      );
     } catch (e) {
       debugPrint('⚠️ [AppProvider] Fast GPS send failed: $e');
     }
@@ -3363,6 +3359,173 @@ class AppProvider with ChangeNotifier {
     });
   }
 
+  bool _handleFastGpsPayload(Uint8List payload) {
+    final fastGpsPacket = FastGpsPacket.tryParseBinary(payload);
+    if (fastGpsPacket == null) {
+      return false;
+    }
+
+    final sender = _resolveContactByPrefixHex(fastGpsPacket.senderKey6);
+    if (sender != null) {
+      contactsProvider.updateFastGps(
+        sender.publicKey.sublist(0, 6),
+        fastGpsPacket,
+      );
+    }
+    return true;
+  }
+
+  bool _handleIncomingImageBinaryPayload(
+    Uint8List payload, {
+    bool allowPreEnvelopeBuffer = false,
+  }) {
+    if (!ImagePacket.isImageBinary(payload)) {
+      return false;
+    }
+    final frag = ImagePacket.tryParseBinary(payload);
+    if (frag == null) {
+      return true;
+    }
+    debugPrint('📷 [AppProvider] Binary image fragment received: $frag');
+    final session = imageProvider.session(frag.sessionId);
+    if (session == null && frag.total < 1) {
+      if (allowPreEnvelopeBuffer) {
+        _pendingChannelImageFragments.putIfAbsent(
+          frag.sessionId,
+          () => <int, ImagePacket>{},
+        )[frag.index] = frag;
+        debugPrint(
+          '📷 [AppProvider] Buffered compact image fragment before envelope '
+          'for session ${frag.sessionId} index=${frag.index}',
+        );
+      } else {
+        debugPrint(
+          '⚠️ [AppProvider] Dropping compact image fragment without envelope '
+          'for session ${frag.sessionId}',
+        );
+      }
+      return true;
+    }
+
+    imageProvider.addFragment(
+      session == null
+          ? frag
+          : ImagePacket(
+              sessionId: frag.sessionId,
+              format: session.format,
+              index: frag.index,
+              total: session.total,
+              data: frag.data,
+            ),
+      width: session?.width ?? 0,
+      height: session?.height ?? 0,
+    );
+    _scheduleImageMissingRetry(
+      frag.sessionId,
+      justComplete: imageProvider.isComplete(frag.sessionId),
+    );
+    return true;
+  }
+
+  bool _handleIncomingVoiceBinaryPayload(
+    Uint8List payload, {
+    bool allowPreEnvelopeBuffer = false,
+  }) {
+    if (!VoicePacket.isVoiceBinary(payload)) {
+      return false;
+    }
+    final pkt = VoicePacket.tryParseBinary(payload);
+    if (pkt == null) {
+      return true;
+    }
+    debugPrint('🎙️ [AppProvider] Binary voice packet received: $pkt');
+    final session = voiceProvider.session(pkt.sessionId);
+    if (session == null && pkt.total < 1) {
+      if (allowPreEnvelopeBuffer) {
+        _pendingChannelVoicePackets.putIfAbsent(
+          pkt.sessionId,
+          () => <int, VoicePacket>{},
+        )[pkt.index] = pkt;
+        debugPrint(
+          '🎙️ [AppProvider] Buffered compact voice packet before envelope '
+          'for session ${pkt.sessionId} index=${pkt.index}',
+        );
+      } else {
+        debugPrint(
+          '⚠️ [AppProvider] Dropping compact voice packet without envelope '
+          'for session ${pkt.sessionId}',
+        );
+      }
+      return true;
+    }
+
+    final normalizedPacket = session == null
+        ? pkt
+        : VoicePacket(
+            sessionId: pkt.sessionId,
+            mode: session.mode,
+            index: pkt.index,
+            total: session.total,
+            codec2Data: pkt.codec2Data,
+          );
+    final justComplete = voiceProvider.addPacket(normalizedPacket);
+    _scheduleVoiceMissingRetry(pkt.sessionId, justComplete: justComplete);
+    _handleIncomingVoicePacket(normalizedPacket, justComplete: justComplete);
+    return true;
+  }
+
+  void _replayPendingChannelVoicePackets(String sessionId) {
+    final pending = _pendingChannelVoicePackets.remove(sessionId);
+    final session = voiceProvider.session(sessionId);
+    if (pending == null || pending.isEmpty || session == null) {
+      return;
+    }
+
+    final indices = pending.keys.toList()..sort();
+    for (final index in indices) {
+      final packet = pending[index]!;
+      final normalizedPacket = VoicePacket(
+        sessionId: packet.sessionId,
+        mode: session.mode,
+        index: packet.index,
+        total: session.total,
+        codec2Data: packet.codec2Data,
+      );
+      final justComplete = voiceProvider.addPacket(normalizedPacket);
+      _scheduleVoiceMissingRetry(sessionId, justComplete: justComplete);
+      _handleIncomingVoicePacket(normalizedPacket, justComplete: justComplete);
+    }
+  }
+
+  void _replayPendingChannelImageFragments(String sessionId) {
+    final pending = _pendingChannelImageFragments.remove(sessionId);
+    final session = imageProvider.session(sessionId);
+    if (pending == null || pending.isEmpty || session == null) {
+      return;
+    }
+
+    final indices = pending.keys.toList()..sort();
+    for (final index in indices) {
+      final fragment = pending[index]!;
+      final normalizedFragment = ImagePacket(
+        sessionId: fragment.sessionId,
+        format: session.format,
+        index: fragment.index,
+        total: session.total,
+        data: fragment.data,
+      );
+      imageProvider.addFragment(
+        normalizedFragment,
+        width: session.width,
+        height: session.height,
+      );
+      _scheduleImageMissingRetry(
+        sessionId,
+        justComplete: imageProvider.isComplete(sessionId),
+      );
+    }
+  }
+
   /// Insert or update a voice placeholder message for binary raw-data packets.
   ///
   /// Binary voice packets arrive without a chat message, so we synthesise one
@@ -3767,6 +3930,8 @@ class AppProvider with ChangeNotifier {
     _imageMissingRetryAttempts.clear();
     _voiceSessionSenderKey6.clear();
     _imageSessionSenderKey6.clear();
+    _pendingChannelVoicePackets.clear();
+    _pendingChannelImageFragments.clear();
     _lowBatteryNotifiedNodeIds.clear();
     notifyListeners();
   }
@@ -3876,6 +4041,8 @@ class AppProvider with ChangeNotifier {
     for (final timer in _imageMissingRetryTimers.values) {
       timer.cancel();
     }
+    _pendingChannelVoicePackets.clear();
+    _pendingChannelImageFragments.clear();
     super.dispose();
   }
 }

lib/providers/connection_provider.dart

@@ -105,8 +105,6 @@ class ConnectionProvider with ChangeNotifier {
 
   bool _isScanning = false;
   bool get isScanning => _isScanning;
-  bool _isSpectrumScanActive = false;
-  bool get isSpectrumScanActive => _isSpectrumScanActive;
   final Set<int> _pendingDeletedChannelIndices = <int>{};
 
   String? _error;
@@ -212,6 +210,15 @@ class ConnectionProvider with ChangeNotifier {
   onMessageEchoDetected;
   Function(Uint8List publicKeyPrefix, Uint8List statusData)? onStatusResponse;
   Function(Uint8List payload, int snrRaw, int rssiDbm)? onRawDataReceived;
+  Function(
+    int channelIdx,
+    int pathLen,
+    int dataType,
+    Uint8List payload,
+    int snrRaw,
+    int? rssiDbm,
+  )?
+  onChannelDataReceived;
   Function(Uint8List payload, int snrRaw, int rssiDbm, int pathLen)?
   onControlDataReceived;
   Contact? Function(Uint8List contactPublicKey)? resolveContactForDmCallback;
@@ -463,10 +470,6 @@ class ConnectionProvider with ChangeNotifier {
     };
 
     service.onMessageWaiting = () {
-      if (_isSpectrumScanActive) {
-        debugPrint('📥 [Provider] MSG_WAITING ignored during spectrum scan');
-        return;
-      }
       if (!(canStartAutomaticMessageSyncCallback?.call() ?? true)) {
         _pendingAutomaticMessageSync = true;
         debugPrint(
@@ -533,6 +536,16 @@ class ConnectionProvider with ChangeNotifier {
 
     service.onRawDataReceived = (payload, snrRaw, rssiDbm) =>
         onRawDataReceived?.call(payload, snrRaw, rssiDbm);
+    service.onChannelDataReceived =
+        (channelIdx, pathLen, dataType, payload, snrRaw, rssiDbm) =>
+            onChannelDataReceived?.call(
+              channelIdx,
+              pathLen,
+              dataType,
+              payload,
+              snrRaw,
+              rssiDbm,
+            );
     service.onControlDataReceived = (payload, snrRaw, rssiDbm, pathLen) =>
         onControlDataReceived?.call(payload, snrRaw, rssiDbm, pathLen);
 
@@ -548,10 +561,14 @@ class ConnectionProvider with ChangeNotifier {
         semanticVersion: deviceInfo['semanticVersion'] as String?,
         clientRepeat: deviceInfo['clientRepeat'] as bool?,
         pathHashMode: deviceInfo['pathHashMode'] as int?,
-        supportsSpectrumScan: deviceInfo['supportsSpectrumScan'] as bool?,
-        spectrumScanMinKhz: deviceInfo['spectrumScanMinKhz'] as int?,
-        spectrumScanMaxKhz: deviceInfo['spectrumScanMaxKhz'] as int?,
       );
+
+      // Clear any stale flood scope on connect (firmware v8+)
+      final fwVer = deviceInfo['firmwareVersion'] as int?;
+      if (fwVer != null && fwVer >= 8) {
+        clearFloodScope();
+      }
+
       notifyListeners();
     };
 
@@ -1724,6 +1741,7 @@ class ConnectionProvider with ChangeNotifier {
     required int channelIdx,
     required String text,
     String? messageId,
+    Uint8List? floodScopeKey,
   }) async {
     if (!_activeService.isConnected) {
       _error = 'Not connected to device';
@@ -1736,10 +1754,12 @@ class ConnectionProvider with ChangeNotifier {
       debugPrint('  Channel: $channelIdx');
       debugPrint('  Text: $text');
       debugPrint('  MessageID: $messageId');
+      debugPrint('  FloodScope: ${floodScopeKey != null ? "set (${floodScopeKey.length}B)" : "none"}');
 
       await _activeService.sendChannelMessage(
         channelIdx: channelIdx,
         text: text,
+        floodScopeKey: floodScopeKey,
       );
 
       debugPrint('✅ [ConnectionProvider] BLE send completed');
@@ -1804,6 +1824,42 @@ class ConnectionProvider with ChangeNotifier {
     );
   }
 
+  /// Clear the flood scope on the device (firmware v8+).
+  Future<void> clearFloodScope() async {
+    if (!_activeService.isConnected) return;
+    try {
+      await _activeService.clearFloodScope();
+    } catch (e) {
+      debugPrint('⚠️ [ConnectionProvider] Failed to clear flood scope: $e');
+    }
+  }
+
+  Future<void> sendChannelData({
+    required int channelIdx,
+    required int dataType,
+    required Uint8List payload,
+    Uint8List? floodScopeKey,
+  }) async {
+    if (!_activeService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      await _activeService.sendChannelData(
+        channelIdx: channelIdx,
+        dataType: dataType,
+        payload: payload,
+        floodScopeKey: floodScopeKey,
+      );
+    } catch (e) {
+      _error = 'Failed to send channel data: $e';
+      notifyListeners();
+      rethrow;
+    }
+  }
+
   /// Request telemetry from contact
   ///
   /// COMPATIBILITY NOTE: This method sends CMD_SEND_TELEMETRY_REQ (39).
@@ -2238,43 +2294,6 @@ class ConnectionProvider with ChangeNotifier {
     }
   }
 
-  Future<SpectrumScanResult?> scanSpectrum({
-    required int startFrequencyKhz,
-    required int stopFrequencyKhz,
-    required int bandwidthKhz,
-    required int stepKhz,
-    required int dwellMs,
-    required int thresholdDb,
-  }) async {
-    if (!_activeService.isConnected) {
-      _error = 'Not connected to device';
-      notifyListeners();
-      return null;
-    }
-
-    try {
-      _isSpectrumScanActive = true;
-      _activeService.setSpectrumScanActive(true);
-      notifyListeners();
-      return await _activeService.scanSpectrum(
-        startFrequencyKhz: startFrequencyKhz,
-        stopFrequencyKhz: stopFrequencyKhz,
-        bandwidthKhz: bandwidthKhz,
-        stepKhz: stepKhz,
-        dwellMs: dwellMs,
-        thresholdDb: thresholdDb,
-      );
-    } catch (e) {
-      _error = 'Failed to scan spectrum: $e';
-      notifyListeners();
-      return null;
-    } finally {
-      _isSpectrumScanActive = false;
-      _activeService.setSpectrumScanActive(false);
-      notifyListeners();
-    }
-  }
-
   /// Set transmit power
   Future<void> setTxPower(int powerDbm) async {
     if (!_activeService.isConnected) {
@@ -2464,7 +2483,6 @@ class ConnectionProvider with ChangeNotifier {
   }
 
   Future<void> refreshDeviceInfo() async {
-    if (_isSpectrumScanActive) return;
     if (!_activeService.isConnected) {
       _error = 'Not connected to device';
       notifyListeners();
@@ -2537,7 +2555,6 @@ class ConnectionProvider with ChangeNotifier {
   /// Sync messages from device queue
   /// Call this repeatedly until no more messages are available
   Future<bool> syncNextMessage() async {
-    if (_isSpectrumScanActive) return false;
     // Prevent re-entrancy and too-fast triggers
     if (_isSyncingMessages) {
       // Another sync (single or loop) is in progress
@@ -2576,10 +2593,6 @@ class ConnectionProvider with ChangeNotifier {
 
   /// Sync all waiting messages from device
   Future<int> syncAllMessages({bool force = false}) async {
-    if (_isSpectrumScanActive) {
-      debugPrint('⏸️ [Provider] Message sync skipped during spectrum scan');
-      return 0;
-    }
     if (!force && !(canStartAutomaticMessageSyncCallback?.call() ?? true)) {
       _pendingAutomaticMessageSync = true;
       debugPrint(

lib/providers/map_provider.dart

@@ -37,8 +37,6 @@ class MapProvider with ChangeNotifier {
   MapCoordinateSpace _targetCoordinateSpace = MapCoordinateSpace.geo;
   String? _targetMapId;
 
-  final Set<String> _visibleContactPaths = {};
-
   LocationTrail? _currentTrail;
   bool _isTrailVisible = true;
   final List<LocationTrail> _trailHistory = [];
@@ -55,7 +53,6 @@ class MapProvider with ChangeNotifier {
   bool _showPlaceNamesOverlay = false;
   bool _showMunicipalityBordersOverlay = false;
 
-  bool _showAllContactTrails = true;
   bool _hideRepeatersOnMap = false;
 
   LocationTrail? _importedTrail;
@@ -72,8 +69,6 @@ class MapProvider with ChangeNotifier {
   bool get shouldAnimate => _shouldAnimate;
   MapCoordinateSpace get targetCoordinateSpace => _targetCoordinateSpace;
   String? get targetMapId => _targetMapId;
-  Set<String> get visibleContactPaths => Set.unmodifiable(_visibleContactPaths);
-
   LocationTrail? get currentTrail => _currentTrail;
   bool get isTrailVisible => _isTrailVisible;
   List<LocationTrail> get trailHistory => List.unmodifiable(_trailHistory);
@@ -91,7 +86,6 @@ class MapProvider with ChangeNotifier {
   bool get showPlaceNamesOverlay => _showPlaceNamesOverlay;
   bool get showMunicipalityBordersOverlay => _showMunicipalityBordersOverlay;
 
-  bool get showAllContactTrails => _showAllContactTrails;
   bool get hideRepeatersOnMap => _hideRepeatersOnMap;
 
   LocationTrail? get importedTrail => _importedTrail;
@@ -365,30 +359,6 @@ class MapProvider with ChangeNotifier {
     notifyListeners();
   }
 
-  void toggleContactPath(String publicKeyHex) {
-    if (_visibleContactPaths.contains(publicKeyHex)) {
-      _visibleContactPaths.remove(publicKeyHex);
-    } else {
-      _visibleContactPaths.add(publicKeyHex);
-    }
-    notifyListeners();
-  }
-
-  bool isContactPathVisible(String publicKeyHex) {
-    return _visibleContactPaths.contains(publicKeyHex);
-  }
-
-  void hideAllPaths() {
-    _visibleContactPaths.clear();
-    notifyListeners();
-  }
-
-  void showOnlyPath(String publicKeyHex) {
-    _visibleContactPaths.clear();
-    _visibleContactPaths.add(publicKeyHex);
-    notifyListeners();
-  }
-
   void startTrail() {
     if (_currentTrail != null && _currentTrail!.isActive) {
       endTrail();
@@ -556,12 +526,17 @@ class MapProvider with ChangeNotifier {
   Future<void> _loadInitialState() async {
     await Future.wait([
       loadOverlayState(),
-      loadTrailSettings(),
       loadRepeaterVisibilitySettings(),
       _loadCustomMapState(),
+      _removeDeprecatedSettings(),
     ]);
   }
 
+  Future<void> _removeDeprecatedSettings() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_scopedKey('map_show_all_contact_trails'));
+  }
+
   Future<void> _saveOverlayState() async {
     final prefs = await SharedPreferences.getInstance();
     await prefs.setBool(
@@ -610,27 +585,6 @@ class MapProvider with ChangeNotifier {
     );
   }
 
-  Future<void> toggleAllContactTrails() async {
-    _showAllContactTrails = !_showAllContactTrails;
-    notifyListeners();
-    await _saveTrailSettings();
-  }
-
-  Future<void> loadTrailSettings() async {
-    final prefs = await SharedPreferences.getInstance();
-    _showAllContactTrails =
-        prefs.getBool(_scopedKey('map_show_all_contact_trails')) ?? true;
-    notifyListeners();
-  }
-
-  Future<void> _saveTrailSettings() async {
-    final prefs = await SharedPreferences.getInstance();
-    await prefs.setBool(
-      _scopedKey('map_show_all_contact_trails'),
-      _showAllContactTrails,
-    );
-  }
-
   Future<void> setHideRepeatersOnMap(bool hide) async {
     if (_hideRepeatersOnMap == hide) return;
     _hideRepeatersOnMap = hide;
@@ -755,7 +709,6 @@ class MapProvider with ChangeNotifier {
       'showKrasFireZonesOverlay': _showKrasFireZonesOverlay,
       'showPlaceNamesOverlay': _showPlaceNamesOverlay,
       'showMunicipalityBordersOverlay': _showMunicipalityBordersOverlay,
-      'showAllContactTrails': _showAllContactTrails,
       'hideRepeatersOnMap': _hideRepeatersOnMap,
     };
   }
@@ -792,7 +745,6 @@ class MapProvider with ChangeNotifier {
     _showPlaceNamesOverlay = json['showPlaceNamesOverlay'] as bool? ?? false;
     _showMunicipalityBordersOverlay =
         json['showMunicipalityBordersOverlay'] as bool? ?? false;
-    _showAllContactTrails = json['showAllContactTrails'] as bool? ?? true;
     _hideRepeatersOnMap = json['hideRepeatersOnMap'] as bool? ?? false;
     notifyListeners();
   }

lib/screens/discovery_screen.dart

@@ -12,7 +12,9 @@ import '../widgets/compact_signal_indicator.dart' show SignalMetric;
 enum _DiscoveryListFilter { all, repeaters, sensors, others }
 
 class DiscoveryScreen extends StatefulWidget {
-  const DiscoveryScreen({super.key});
+  final bool autoDiscoverRepeatersOnOpen;
+
+  const DiscoveryScreen({super.key, this.autoDiscoverRepeatersOnOpen = false});
 
   @override
   State<DiscoveryScreen> createState() => _DiscoveryScreenState();
@@ -25,6 +27,7 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
   final Set<int> _runningDiscoveryTypes = <int>{};
   final TextEditingController _searchController = TextEditingController();
   bool _isResolvingAll = false;
+  bool _hasQueuedAutoRepeaterDiscovery = false;
   String _searchQuery = '';
   _DiscoveryListFilter _selectedFilter = _DiscoveryListFilter.all;
   late final Future<List<MeshMapNode>> _cachedNodesFuture;
@@ -35,6 +38,13 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
     _cachedNodesFuture = MeshMapNodesService.loadCachedNodes(
       cacheTtl: MeshMapNodesService.traceCacheTtl,
     );
+
+    if (widget.autoDiscoverRepeatersOnOpen) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (!mounted) return;
+        _autoDiscoverRepeaters();
+      });
+    }
   }
 
   @override
@@ -96,9 +106,10 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
         advertType: advertType,
       );
       if (!mounted) return;
+      final l10n = AppLocalizations.of(context)!;
       final label = switch (advertType) {
-        _repeaterAdvertType => 'Repeater discovery sent',
-        _sensorAdvertType => 'Sensor discovery sent',
+        _repeaterAdvertType => l10n.repeaterDiscoverySent,
+        _sensorAdvertType => l10n.sensorDiscoverySent,
         _ => 'Discovery sent',
       };
       ScaffoldMessenger.of(
@@ -113,6 +124,14 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
     }
   }
 
+  Future<void> _autoDiscoverRepeaters() async {
+    if (_hasQueuedAutoRepeaterDiscovery) {
+      return;
+    }
+    _hasQueuedAutoRepeaterDiscovery = true;
+    await _discoverNodeType(_repeaterAdvertType);
+  }
+
   Future<void> _resolveAdvert(PendingAdvert advert) async {
     final keyHex = advert.publicKeyHex;
     if (_resolvingAdvertKeys.contains(keyHex)) return;

lib/screens/home_screen.dart

@@ -23,13 +23,11 @@ import 'device_config_screen.dart';
 import 'packet_log_screen.dart';
 import 'live_traffic_screen.dart';
 import 'profiles_screen.dart';
-import 'spectrum_scan_screen.dart';
 import '../utils/toast_logger.dart';
 import '../l10n/app_localizations.dart';
 import '../widgets/permission_request_dialog.dart';
 import '../widgets/connection_dialog.dart';
 import '../utils/battery_display_helper.dart';
-import '../services/developer_mode_service.dart';
 import '../services/mesh_map_nodes_service.dart';
 import '../services/profile_device_key_resolver.dart';
 import '../services/profile_manager.dart';
@@ -68,7 +66,6 @@ class _HomeScreenState extends State<HomeScreen>
   int _currentIndex = 0;
   bool _isMapFullscreen = false;
   bool _showRxTxIndicators = true;
-  bool _isDeveloperModeEnabled = false;
   bool _isMapEnabled = true;
   bool _isContactsEnabled = true;
   bool _isSensorsEnabled = false;
@@ -107,7 +104,6 @@ class _HomeScreenState extends State<HomeScreen>
     // Initialize synchronously so first build always has a valid controller.
     _initTabController();
     _loadRxTxPreference();
-    _loadDeveloperModePreference();
     MeshMapNodesService.syncInBackgroundIfStale();
 
     // Show permission dialog after the first frame if needed
@@ -291,14 +287,6 @@ class _HomeScreenState extends State<HomeScreen>
     }
   }
 
-  Future<void> _loadDeveloperModePreference() async {
-    final isEnabled = await DeveloperModeService.isEnabled();
-    if (!mounted) return;
-    setState(() {
-      _isDeveloperModeEnabled = isEnabled;
-    });
-  }
-
   void _showPermissionDialog() {
     if (!mounted) return;
 
@@ -749,12 +737,10 @@ class _HomeScreenState extends State<HomeScreen>
     }
   }
 
-  void _showConnectionDialog(BuildContext context) {
-    showModalBottomSheet(
-      context: context,
-      isScrollControlled: true,
+  Future<void> _showConnectionDialog(BuildContext context) async {
+    await showConnectionDialogFlow(
+      context,
       backgroundColor: Colors.transparent,
-      builder: (context) => const ConnectionDialog(),
     );
   }
 
@@ -811,32 +797,6 @@ class _HomeScreenState extends State<HomeScreen>
                         .read<ProfileManager>()
                         .profilesEnabled;
 
-                    if (_isDeveloperModeEnabled) {
-                      items.add(
-                        PopupMenuItem(
-                          child: Row(
-                            children: [
-                              const Icon(Icons.radar),
-                              SizedBox(width: 8),
-                              Text(AppLocalizations.of(context)!.spectrumScan),
-                            ],
-                          ),
-                          onTap: () {
-                            final navigator = Navigator.of(context);
-                            Future.delayed(Duration.zero, () {
-                              if (!mounted) return;
-                              navigator.push(
-                                MaterialPageRoute(
-                                  builder: (context) =>
-                                      const SpectrumScanScreen(),
-                                ),
-                              );
-                            });
-                          },
-                        ),
-                      );
-                    }
-
                     items.add(
                       PopupMenuItem(
                         child: Row(
@@ -954,7 +914,6 @@ class _HomeScreenState extends State<HomeScreen>
                               ),
                             );
                             _loadRxTxPreference();
-                            _loadDeveloperModePreference();
                           });
                         },
                       ),

lib/screens/map_tab.dart

@@ -3,6 +3,7 @@ import 'dart:io';
 import 'dart:math' as math;
 import 'dart:typed_data';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart' show MissingPluginException;
 import 'package:flutter_map/flutter_map.dart' as flutter_map;
 import 'package:flutter_map/flutter_map.dart';
 import 'package:latlong2/latlong.dart';
@@ -10,6 +11,7 @@ import 'package:provider/provider.dart';
 import 'package:geolocator/geolocator.dart';
 import 'package:flutter_compass/flutter_compass.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import '../services/compass_support.dart';
 import '../utils/slovenian_crs.dart';
 import '../providers/contacts_provider.dart';
 import '../providers/messages_provider.dart';
@@ -27,7 +29,6 @@ import '../services/background_location_service.dart';
 import '../services/location_tracking_service.dart';
 import '../services/map_marker_service.dart';
 import '../services/message_destination_preferences.dart';
-import '../services/trail_color_service.dart';
 import '../services/profiles_feature_service.dart';
 import '../widgets/map_debug_info.dart';
 import '../widgets/map/compass_widget.dart';
@@ -201,46 +202,64 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
   }
 
   void _startCompassTracking() {
+    if (!CompassSupport.isAvailable) {
+      return;
+    }
+
     final compassStream = FlutterCompass.events;
     if (compassStream == null) {
       return;
     }
 
     // Start listening to compass events
-    _compassStreamSubscription = compassStream.listen((CompassEvent event) {
-      // Check if widget is disposing, mounted, and event has valid heading
-      if (_isDisposing || !mounted || event.heading == null) return;
+    _compassStreamSubscription = compassStream.listen(
+      (CompassEvent event) {
+        // Check if widget is disposing, mounted, and event has valid heading
+        if (_isDisposing || !mounted || event.heading == null) return;
 
-      try {
-        setState(() {
-          _compassHeading = event.heading;
-        });
+        try {
+          setState(() {
+            _compassHeading = event.heading;
+          });
 
-        // Rotate map if rotation mode is enabled and we have compass heading
-        // Only rotate if map is ready
-        if (_rotateMarkerWithHeading &&
-            event.heading != null &&
-            _isMapReady &&
-            !_isDisposing) {
-          try {
-            // Use moveAndRotate to set absolute rotation
-            final camera = _mapController.camera;
-            _mapController.moveAndRotate(
-              camera.center,
-              camera.zoom,
-              -event.heading!,
-            );
-          } catch (e) {
-            // Map not ready yet, ignore
+          // Rotate map if rotation mode is enabled and we have compass heading
+          // Only rotate if map is ready
+          if (_rotateMarkerWithHeading &&
+              event.heading != null &&
+              _isMapReady &&
+              !_isDisposing) {
+            try {
+              // Use moveAndRotate to set absolute rotation
+              final camera = _mapController.camera;
+              _mapController.moveAndRotate(
+                camera.center,
+                camera.zoom,
+                -event.heading!,
+              );
+            } catch (e) {
+              // Map not ready yet, ignore
+            }
+          }
+        } catch (e) {
+          // Widget disposed during setState, ignore
+          if (!_isDisposing) {
+            debugPrint('Compass tracking error: $e');
           }
         }
-      } catch (e) {
-        // Widget disposed during setState, ignore
-        if (!_isDisposing) {
-          debugPrint('Compass tracking error: $e');
+      },
+      onError: (Object error, StackTrace stackTrace) {
+        if (_isDisposing) {
+          return;
         }
-      }
-    });
+
+        if (error is MissingPluginException) {
+          debugPrint('Compass plugin is unavailable on this platform');
+          return;
+        }
+
+        debugPrint('Compass tracking stream error: $error');
+      },
+    );
   }
 
   Future<void> _loadSettings() async {
@@ -873,7 +892,9 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                           if (!hasCustomMap)
                             ListTile(
                               leading: Icon(Icons.add_photo_alternate),
-                              title: Text(AppLocalizations.of(context)!.loadFromGallery),
+                              title: Text(
+                                AppLocalizations.of(context)!.loadFromGallery,
+                              ),
                               subtitle: const Text(
                                 'Use a cave map image instead of GPS tiles',
                               ),
@@ -905,7 +926,9 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                             ),
                             ListTile(
                               leading: Icon(Icons.swap_horizontal_circle),
-                              title: Text(AppLocalizations.of(context)!.replaceImage),
+                              title: Text(
+                                AppLocalizations.of(context)!.replaceImage,
+                              ),
                               subtitle: const Text(
                                 'Pick a different map from the gallery',
                               ),
@@ -941,7 +964,9 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                             if (customMapConfig.isCalibrated)
                               ListTile(
                                 leading: Icon(Icons.clear),
-                                title: Text(AppLocalizations.of(context)!.clearScale),
+                                title: Text(
+                                  AppLocalizations.of(context)!.clearScale,
+                                ),
                                 onTap: () async {
                                   await mapProvider.clearCustomMapCalibration();
                                   if (!context.mounted) return;
@@ -999,7 +1024,7 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
         ),
         child: DetailedCompassDialog(
           initialPosition: _locationService.currentPosition,
-          initialHeading: _currentHeading,
+          initialHeading: _compassHeading,
           contacts: contacts,
           sarMarkers: sarMarkers,
         ),
@@ -1025,7 +1050,7 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
         ),
         child: DetailedCompassDialog(
           initialPosition: _locationService.currentPosition,
-          initialHeading: _currentHeading,
+          initialHeading: _compassHeading,
           contacts: contacts,
           sarMarkers: sarMarkers,
           preSelectedContact: selectedContact,
@@ -1277,9 +1302,11 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
       _stopCustomMapCalibration();
 
       if (!mounted) return;
-      ScaffoldMessenger.of(
-        context,
-      ).showSnackBar(SnackBar(content: Text(AppLocalizations.of(context)!.customMapScaleSaved)));
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(AppLocalizations.of(context)!.customMapScaleSaved),
+        ),
+      );
     }
   }
 
@@ -1419,7 +1446,9 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                     contentPadding: EdgeInsets.zero,
                     leading: Icon(Icons.chat_bubble_outline),
                     title: Text(AppLocalizations.of(context)!.openMessage),
-                    subtitle: Text(AppLocalizations.of(context)!.jumpToTheRelatedSarMessage),
+                    subtitle: Text(
+                      AppLocalizations.of(context)!.jumpToTheRelatedSarMessage,
+                    ),
                     onTap: () async {
                       Navigator.pop(sheetContext);
                       await _openSarMarkerMessage(
@@ -1655,7 +1684,11 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(
-          content: Text(AppLocalizations.of(context)!.pleaseSelectADestinationToSendSarMarker),
+          content: Text(
+            AppLocalizations.of(
+              context,
+            )!.pleaseSelectADestinationToSendSarMarker,
+          ),
           backgroundColor: Colors.red,
         ),
       );
@@ -1785,7 +1818,9 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
         if (!mounted) return;
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(
-            content: Text(AppLocalizations.of(context)!.sarMarkerBroadcastToPublicChannel),
+            content: Text(
+              AppLocalizations.of(context)!.sarMarkerBroadcastToPublicChannel,
+            ),
             backgroundColor: Colors.orange,
             duration: Duration(seconds: 2),
           ),
@@ -2514,52 +2549,6 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                         );
                       },
                     ),
-                    // Contact trail polylines (rendered before user trail and markers)
-                    Consumer<MapProvider>(
-                      builder: (context, mapProvider, _) {
-                        // Determine which contacts to show trails for
-                        final contactsToShow = mapProvider.showAllContactTrails
-                            ? contactsWithLocation // Show all when master toggle is ON
-                            : contactsWithLocation.where(
-                                (contact) => mapProvider.isContactPathVisible(
-                                  contact.publicKeyHex,
-                                ),
-                              ); // Individual toggles
-
-                        return PolylineLayer(
-                          polylines: contactsToShow
-                              .where(
-                                (contact) => contact.advertHistory.length >= 2,
-                              )
-                              .map((contact) {
-                                // Use TrailColorService for consistent, emoji-based colors
-                                final color = TrailColorService.getTrailColor(
-                                  contact,
-                                );
-
-                                return Polyline(
-                                  points: contact.advertHistory
-                                      .map((advert) => advert.location)
-                                      .toList(),
-                                  color: color.withValues(
-                                    alpha: 0.95,
-                                  ), // More opaque for better visibility
-                                  strokeWidth:
-                                      4.5, // Thicker for better visibility on all map backgrounds
-                                  borderColor: Colors.white.withValues(
-                                    alpha: 0.6,
-                                  ), // Stronger border contrast
-                                  borderStrokeWidth: 2.0, // Wider border
-                                  // DASHED pattern to distinguish from solid user trail
-                                  pattern: StrokePattern.dashed(
-                                    segments: [8, 4],
-                                  ),
-                                );
-                              })
-                              .toList(),
-                        );
-                      },
-                    ),
                     // Location trail layer (rendered after paths, before drawings)
                     const LocationTrailLayer(),
                   ],
@@ -2604,7 +2593,8 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                           context: context,
                           mapRotation: _getMapRotation(),
                           userPosition: _locationService.currentPosition,
-                          estimatedLocations: contactsProvider.estimatedLocations,
+                          estimatedLocations:
+                              contactsProvider.estimatedLocations,
                           onTap: (contact) {
                             _showDetailedCompassWithContact(
                               context,

lib/screens/messages_tab.dart

@@ -6,6 +6,7 @@ import 'dart:math' as math;
 import 'dart:typed_data';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:meshcore_client/meshcore_client.dart' show MeshCoreConstants;
 import 'package:provider/provider.dart';
 import 'package:geolocator/geolocator.dart';
 import '../providers/messages_provider.dart';
@@ -35,6 +36,8 @@ import '../utils/tictactoe_message_parser.dart';
 import '../providers/image_provider.dart' as ip;
 import '../services/image_codec_service.dart';
 import '../services/image_preferences.dart';
+import '../services/region_scope_preferences.dart';
+import '../services/region_discovery_service.dart';
 import 'package:image_picker/image_picker.dart';
 import '../l10n/app_localizations.dart';
 
@@ -51,102 +54,78 @@ class MessagesTab extends StatefulWidget {
 class _ComposerActionTile extends StatelessWidget {
   final IconData icon;
   final String title;
-  final String subtitle;
   final Color color;
   final bool enabled;
+  final bool busy;
   final VoidCallback? onTap;
 
   const _ComposerActionTile({
     required this.icon,
     required this.title,
-    required this.subtitle,
     required this.color,
     this.enabled = true,
+    this.busy = false,
     this.onTap,
   });
 
   @override
   Widget build(BuildContext context) {
-    final colorScheme = Theme.of(context).colorScheme;
+    final theme = Theme.of(context);
+    final colorScheme = theme.colorScheme;
     final effectiveColor = enabled
         ? color
         : colorScheme.onSurfaceVariant.withValues(alpha: 0.45);
 
     return Material(
-      color: Colors.transparent,
-      child: InkWell(
-        borderRadius: BorderRadius.circular(24),
+      color: enabled
+          ? colorScheme.surfaceContainerLow
+          : colorScheme.surfaceContainerLowest,
+      borderRadius: BorderRadius.circular(20),
+      child: ListTile(
+        contentPadding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
+        enabled: enabled,
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
         onTap: enabled ? onTap : null,
-        child: Ink(
+        leading: Container(
+          width: 42,
+          height: 42,
           decoration: BoxDecoration(
-            gradient: LinearGradient(
-              begin: Alignment.topLeft,
-              end: Alignment.bottomRight,
-              colors: [
-                enabled
-                    ? colorScheme.surfaceContainerLow
-                    : colorScheme.surfaceContainerHighest,
-                enabled
-                    ? effectiveColor.withValues(alpha: 0.08)
-                    : colorScheme.surfaceContainerHigh,
-              ],
-            ),
-            borderRadius: BorderRadius.circular(24),
+            color: effectiveColor.withValues(alpha: enabled ? 0.14 : 0.10),
+            borderRadius: BorderRadius.circular(14),
             border: Border.all(
               color: enabled
                   ? effectiveColor.withValues(alpha: 0.16)
                   : colorScheme.outlineVariant.withValues(alpha: 0.16),
             ),
-            boxShadow: [
-              BoxShadow(
-                color: effectiveColor.withValues(alpha: enabled ? 0.08 : 0.03),
-                blurRadius: 14,
-                offset: const Offset(0, 8),
-              ),
-            ],
           ),
-          child: Padding(
-            padding: const EdgeInsets.all(12),
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Container(
-                  width: 38,
-                  height: 38,
-                  decoration: BoxDecoration(
-                    color: effectiveColor.withValues(alpha: enabled ? 0.14 : 0.10),
-                    borderRadius: BorderRadius.circular(14),
-                  ),
-                  alignment: Alignment.center,
-                  child: Icon(icon, color: effectiveColor, size: 20),
-                ),
-                const SizedBox(height: 8),
-                Text(
-                  title,
-                  maxLines: 2,
-                  overflow: TextOverflow.ellipsis,
-                  style: Theme.of(context).textTheme.titleSmall?.copyWith(
-                    fontWeight: FontWeight.w800,
-                    letterSpacing: -0.2,
-                    color: enabled
-                        ? colorScheme.onSurface
-                        : colorScheme.onSurfaceVariant,
-                  ),
-                ),
-                const SizedBox(height: 4),
-                Text(
-                  subtitle,
-                  maxLines: 2,
-                  overflow: TextOverflow.ellipsis,
-                  style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                    color: colorScheme.onSurfaceVariant,
-                    height: 1.15,
-                  ),
-                ),
-              ],
-            ),
+          alignment: Alignment.center,
+          child: Icon(icon, color: effectiveColor, size: 20),
+        ),
+        title: Text(
+          title,
+          maxLines: 2,
+          overflow: TextOverflow.ellipsis,
+          style: theme.textTheme.titleSmall?.copyWith(
+            fontWeight: FontWeight.w700,
+            letterSpacing: -0.2,
+            color: enabled
+                ? colorScheme.onSurface
+                : colorScheme.onSurfaceVariant,
           ),
         ),
+        trailing: busy
+            ? SizedBox(
+                width: 20,
+                height: 20,
+                child: CircularProgressIndicator(
+                  strokeWidth: 2.2,
+                  color: effectiveColor,
+                ),
+              )
+            : Icon(
+                Icons.chevron_right_rounded,
+                color: colorScheme.onSurfaceVariant,
+              ),
       ),
     );
   }
@@ -176,6 +155,11 @@ class _MessagesTabState extends State<MessagesTab> {
       MessageDestinationPreferences.destinationTypeChannel;
   Contact? _selectedRecipient;
 
+  // Region scope state
+  String? _channelRegionScopeName;
+  Uint8List? _channelRegionScopeKey;
+  Map<int, String> _channelRegionScopes = {};
+
   // Image sending state
   bool _isSendingImage = false;
   final ImagePicker _imagePicker = ImagePicker();
@@ -203,6 +187,7 @@ class _MessagesTabState extends State<MessagesTab> {
     // Load saved message destination
     _loadSavedDestination();
     _loadVoiceSettings();
+    _loadAllChannelRegionScopes();
     WidgetsBinding.instance.addPostFrameCallback((_) {
       _checkForNavigationRequest();
     });
@@ -506,6 +491,9 @@ class _MessagesTabState extends State<MessagesTab> {
     }
 
     _enforceMessageByteLimit();
+
+    // Load region scope for channel destinations
+    await _loadRegionScope();
   }
 
   /// Show recipient selector bottom sheet
@@ -559,6 +547,7 @@ class _MessagesTabState extends State<MessagesTab> {
         currentDestinationType: _destinationType,
         currentRecipientPublicKey: _selectedRecipient?.publicKeyHex,
         onSelect: _onRecipientSelected,
+        channelRegionScopes: _channelRegionScopes,
       ),
     );
   }
@@ -574,6 +563,9 @@ class _MessagesTabState extends State<MessagesTab> {
 
     _enforceMessageByteLimit();
 
+    // Load region scope for channel destinations
+    await _loadRegionScope();
+
     // Save to preferences
     await MessageDestinationPreferences.setDestination(
       type,
@@ -584,6 +576,51 @@ class _MessagesTabState extends State<MessagesTab> {
     if (!mounted) return;
   }
 
+  Future<void> _loadRegionScope() async {
+    if (_destinationType !=
+        MessageDestinationPreferences.destinationTypeChannel) {
+      if (_channelRegionScopeName != null) {
+        setState(() {
+          _channelRegionScopeName = null;
+          _channelRegionScopeKey = null;
+        });
+      }
+      return;
+    }
+    final channelIdx = _selectedRecipient?.publicKey[1] ?? 0;
+    final scope = await RegionScopePreferences.getScope(channelIdx);
+    if (!mounted) return;
+    setState(() {
+      _channelRegionScopeName = scope?.name;
+      _channelRegionScopeKey = scope?.key;
+      if (scope != null) {
+        _channelRegionScopes[channelIdx] = scope.name;
+      } else {
+        _channelRegionScopes.remove(channelIdx);
+      }
+    });
+  }
+
+  Future<void> _loadAllChannelRegionScopes() async {
+    final contactsProvider = context.read<ContactsProvider>();
+    final channels = contactsProvider.chatContacts
+        .where((c) => c.publicKey.length > 1 && c.publicKey[0] == 0)
+        .toList();
+    final scopes = <int, String>{};
+    // Always check channel 0 (public)
+    final scope0 = await RegionScopePreferences.getScope(0);
+    if (scope0 != null) scopes[0] = scope0.name;
+    for (final ch in channels) {
+      final idx = ch.publicKey[1];
+      final scope = await RegionScopePreferences.getScope(idx);
+      if (scope != null) scopes[idx] = scope.name;
+    }
+    if (!mounted) return;
+    setState(() {
+      _channelRegionScopes = scopes;
+    });
+  }
+
   Future<void> _applyPendingDestination({
     required String type,
     String? recipientPublicKeyHex,
@@ -850,11 +887,12 @@ class _MessagesTabState extends State<MessagesTab> {
     // Add to messages list with "sending" status
     messagesProvider.addSentMessage(sentMessage, contact: _selectedRecipient);
 
-    // Send to selected channel
+    // Send to selected channel (with region scope if set)
     await connectionProvider.sendChannelMessage(
       channelIdx: channelIdx,
       text: text,
       messageId: messageId,
+      floodScopeKey: _channelRegionScopeKey,
     );
   }
 
@@ -964,6 +1002,7 @@ class _MessagesTabState extends State<MessagesTab> {
     if (!shouldContinue) return;
     if (!mounted) return;
     final connectionProvider = context.read<ConnectionProvider>();
+    final messagesProvider = context.read<MessagesProvider>();
     if (!connectionProvider.deviceInfo.isConnected) {
       ToastLogger.error(context, 'Not connected to device');
       return;
@@ -975,6 +1014,7 @@ class _MessagesTabState extends State<MessagesTab> {
     final rawBytes = await picked.readAsBytes();
 
     setState(() => _isSendingImage = true);
+    String? failedMessageId;
     try {
       // Compress AVIF using user-selected size, compression and color mode.
       final maxSize = await ImagePreferences.getMaxSize();
@@ -1052,8 +1092,8 @@ class _MessagesTabState extends State<MessagesTab> {
       imageProvider.cacheOutgoingSession(sessionId, fragments, envelope);
 
       // Add local placeholder message.
-      final messagesProvider = context.read<MessagesProvider>();
       final msgId = 'img_${sessionId}_sent';
+      failedMessageId = msgId;
       final isChannel =
           _destinationType ==
           MessageDestinationPreferences.destinationTypeChannel;
@@ -1084,6 +1124,7 @@ class _MessagesTabState extends State<MessagesTab> {
           channelIdx: channelIdx ?? 0,
           text: envelopeText,
           messageId: msgId,
+          floodScopeKey: _channelRegionScopeKey,
         );
       } else if (recipient != null) {
         final sent = await connectionProvider.sendTextMessage(
@@ -1111,10 +1152,24 @@ class _MessagesTabState extends State<MessagesTab> {
         'chunk=${imageDataBytesPerFragment}B',
       );
 
+      if (isChannel) {
+        for (final fragment in fragments) {
+          await connectionProvider.sendChannelData(
+            channelIdx: channelIdx ?? 0,
+            dataType: MeshCoreConstants.dataTypeDev,
+            payload: fragment.encodeBinary(),
+            floodScopeKey: _channelRegionScopeKey,
+          );
+        }
+      }
+
       // Image fragments are always served on demand after an explicit IR2
       // fetch request, including direct contacts.
     } catch (e, st) {
       debugPrint('❌ [Image] _pickAndSendImage: $e\n$st');
+      if (failedMessageId != null) {
+        messagesProvider.markMessageFailed(failedMessageId);
+      }
       if (!mounted) return;
       ToastLogger.error(context, 'Image send failed');
     } finally {
@@ -1398,6 +1453,7 @@ class _MessagesTabState extends State<MessagesTab> {
           channelIdx: channelIdx ?? 0,
           text: envelopeText,
           messageId: msgId,
+          floodScopeKey: _channelRegionScopeKey,
         );
       } else if (recipient != null) {
         final sentSuccessfully = await connectionProvider.sendTextMessage(
@@ -1423,6 +1479,16 @@ class _MessagesTabState extends State<MessagesTab> {
     }
 
     debugPrint('🎙️ [Voice] envelope sent for session $sessionId');
+    if (isChannel) {
+      for (final packet in encodedPackets) {
+        await connectionProvider.sendChannelData(
+          channelIdx: channelIdx ?? 0,
+          dataType: MeshCoreConstants.dataTypeDev,
+          payload: packet.encodeBinary(),
+          floodScopeKey: _channelRegionScopeKey,
+        );
+      }
+    }
     // Mark the placeholder message as "sent" (ackTag=0, timeout=0 = no ACK tracking).
     // addSentMessage() forces deliveryStatus.sending; we upgrade it here so the
     // bubble shows "Sent" instead of "Sending" once all packets are on the wire.
@@ -1572,205 +1638,121 @@ class _MessagesTabState extends State<MessagesTab> {
   void _showComposerActions() {
     showModalBottomSheet(
       context: context,
-      backgroundColor: Colors.transparent,
+      showDragHandle: true,
+      isScrollControlled: true,
       builder: (sheetContext) {
         final theme = Theme.of(sheetContext);
-        final colorScheme = theme.colorScheme;
         final l10n = AppLocalizations.of(context)!;
 
         Future<void> runAction(Future<void> Function() action) async {
           await _runAfterSheetDismissal(sheetContext, action);
         }
 
+        final actions = <Widget>[
+          _ComposerActionTile(
+            icon: Icons.search_rounded,
+            title: l10n.searchMessages,
+            color: const Color(0xFF2B6CB0),
+            onTap: () => runAction(() async {
+              _showFilteredMessageSearch();
+            }),
+          ),
+          _ComposerActionTile(
+            icon: Icons.add_location_alt_rounded,
+            title: l10n.sendSarMarker,
+            color: const Color(0xFFB45309),
+            onTap: () => runAction(() async {
+              _showSarDialog();
+            }),
+          ),
+          if (_voiceSupported)
+            _ComposerActionTile(
+              icon: _isRecording ? Icons.stop_rounded : Icons.mic_rounded,
+              title: _isRecording ? 'Stop recording' : 'Record voice',
+              color: const Color(0xFF7C3AED),
+              enabled: !_isSendingVoice,
+              busy: _isSendingVoice,
+              onTap: !_isSendingVoice
+                  ? () => runAction(() async {
+                      if (_isRecording) {
+                        await _stopAndSendVoice();
+                      } else {
+                        await _startVoiceRecording();
+                      }
+                    })
+                  : null,
+            ),
+          _ComposerActionTile(
+            icon: Icons.photo_library_rounded,
+            title: l10n.sendImageFromGallery,
+            color: const Color(0xFF0F766E),
+            enabled: !_isSendingImage,
+            busy: _isSendingImage,
+            onTap: !_isSendingImage
+                ? () => runAction(() async {
+                    await _pickAndSendImage(source: ImageSource.gallery);
+                  })
+                : null,
+          ),
+          _ComposerActionTile(
+            icon: Icons.camera_alt_rounded,
+            title: l10n.takePhoto,
+            color: const Color(0xFF2563EB),
+            enabled: !_isSendingImage,
+            busy: _isSendingImage,
+            onTap: !_isSendingImage
+                ? () => runAction(() async {
+                    await _pickAndSendImage(source: ImageSource.camera);
+                  })
+                : null,
+          ),
+          _ComposerActionTile(
+            icon: Icons.grid_3x3_rounded,
+            title: l10n.startTictactoe,
+            color: const Color(0xFFBE185D),
+            onTap: () => runAction(() async {
+              await _startTicTacToeGame();
+            }),
+          ),
+          if (_destinationType ==
+              MessageDestinationPreferences.destinationTypeChannel)
+            _ComposerActionTile(
+              icon: _channelRegionScopeName != null
+                  ? Icons.language_rounded
+                  : Icons.public_rounded,
+              title: _channelRegionScopeName != null
+                  ? '${l10n.regionScope}: $_channelRegionScopeName'
+                  : l10n.setRegionScope,
+              color: const Color(0xFF7C3AED),
+              onTap: () => runAction(() async {
+                _showRegionScopeSheet();
+              }),
+            ),
+        ];
+
         return SafeArea(
           child: ConstrainedBox(
             constraints: BoxConstraints(
               maxHeight: MediaQuery.of(sheetContext).size.height * 0.72,
             ),
-            child: Container(
-              margin: const EdgeInsets.fromLTRB(12, 0, 12, 12),
-              decoration: BoxDecoration(
-                gradient: LinearGradient(
-                  begin: Alignment.topCenter,
-                  end: Alignment.bottomCenter,
-                  colors: [
-                    colorScheme.surface,
-                    colorScheme.surfaceContainerLow,
-                  ],
-                ),
-                borderRadius: const BorderRadius.vertical(
-                  top: Radius.circular(32),
-                  bottom: Radius.circular(28),
-                ),
-                boxShadow: [
-                  BoxShadow(
-                    color: colorScheme.shadow.withValues(alpha: 0.14),
-                    blurRadius: 28,
-                    offset: const Offset(0, 10),
+            child: SingleChildScrollView(
+              padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Text(
+                    'More actions',
+                    style: theme.textTheme.titleLarge?.copyWith(
+                      fontWeight: FontWeight.w700,
+                    ),
                   ),
-                ],
-              ),
-              child: SingleChildScrollView(
-                padding: const EdgeInsets.fromLTRB(16, 12, 16, 18),
-                child: Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    Center(
-                      child: Container(
-                        width: 44,
-                        height: 4,
-                        decoration: BoxDecoration(
-                          color: colorScheme.outlineVariant,
-                          borderRadius: BorderRadius.circular(999),
-                        ),
-                      ),
-                    ),
-                    const SizedBox(height: 14),
-                    Row(
-                      crossAxisAlignment: CrossAxisAlignment.start,
-                      children: [
-                        Expanded(
-                          child: Column(
-                            crossAxisAlignment: CrossAxisAlignment.start,
-                            children: [
-                              Text(
-                                'More actions',
-                                style: theme.textTheme.titleLarge?.copyWith(
-                                  fontWeight: FontWeight.w900,
-                                  letterSpacing: -0.4,
-                                ),
-                              ),
-                              const SizedBox(height: 4),
-                              Text(
-                                'Search, share, or start something from this chat.',
-                                style: theme.textTheme.bodyMedium?.copyWith(
-                                  color: colorScheme.onSurfaceVariant,
-                                ),
-                              ),
-                            ],
-                          ),
-                        ),
-                        const SizedBox(width: 12),
-                        Container(
-                          decoration: BoxDecoration(
-                            color: colorScheme.surfaceContainerHigh,
-                            borderRadius: BorderRadius.circular(18),
-                            border: Border.all(
-                              color: colorScheme.outlineVariant.withValues(
-                                alpha: 0.18,
-                              ),
-                            ),
-                          ),
-                          child: IconButton(
-                            onPressed: () => Navigator.pop(sheetContext),
-                            tooltip: l10n.close,
-                            icon: const Icon(Icons.close_rounded),
-                          ),
-                        ),
-                      ],
-                    ),
-                    const SizedBox(height: 18),
-                    LayoutBuilder(
-                      builder: (context, constraints) {
-                        final actions = <Widget>[
-                        _ComposerActionTile(
-                          icon: Icons.search_rounded,
-                          title: l10n.searchMessages,
-                          subtitle: 'Find text in the current conversation',
-                          color: const Color(0xFF2B6CB0),
-                          onTap: () => runAction(() async {
-                            _showFilteredMessageSearch();
-                          }),
-                        ),
-                        _ComposerActionTile(
-                          icon: Icons.add_location_alt_rounded,
-                          title: l10n.sendSarMarker,
-                          subtitle: 'Share a marker with coordinates',
-                          color: const Color(0xFFB45309),
-                          onTap: () => runAction(() async {
-                            _showSarDialog();
-                          }),
-                        ),
-                        if (_voiceSupported)
-                          _ComposerActionTile(
-                            icon: _isRecording
-                                ? Icons.stop_rounded
-                                : Icons.mic_rounded,
-                            title: _isRecording
-                                ? 'Stop recording'
-                                : 'Record voice',
-                            subtitle: _isSendingVoice
-                                ? 'Voice message is sending'
-                                : _isRecording
-                                ? 'Finish and send your clip'
-                                : 'Capture and send a voice note',
-                            color: const Color(0xFF7C3AED),
-                            enabled: !_isSendingVoice,
-                            onTap: !_isSendingVoice
-                                ? () => runAction(() async {
-                                    if (_isRecording) {
-                                      await _stopAndSendVoice();
-                                    } else {
-                                      await _startVoiceRecording();
-                                    }
-                                  })
-                                : null,
-                          ),
-                        _ComposerActionTile(
-                          icon: Icons.photo_library_rounded,
-                          title: l10n.sendImageFromGallery,
-                          subtitle: 'Choose an image from your library',
-                          color: const Color(0xFF0F766E),
-                          enabled: !_isSendingImage,
-                          onTap: !_isSendingImage
-                              ? () => runAction(() async {
-                                  await _pickAndSendImage(
-                                    source: ImageSource.gallery,
-                                  );
-                                })
-                              : null,
-                        ),
-                        _ComposerActionTile(
-                          icon: Icons.camera_alt_rounded,
-                          title: l10n.takePhoto,
-                          subtitle: 'Capture something right now',
-                          color: const Color(0xFF2563EB),
-                          enabled: !_isSendingImage,
-                          onTap: !_isSendingImage
-                              ? () => runAction(() async {
-                                  await _pickAndSendImage(
-                                    source: ImageSource.camera,
-                                  );
-                                })
-                              : null,
-                        ),
-                        _ComposerActionTile(
-                          icon: Icons.grid_3x3_rounded,
-                          title: l10n.startTictactoe,
-                          subtitle: l10n.dmOnly,
-                          color: const Color(0xFFBE185D),
-                          onTap: () => runAction(() async {
-                            await _startTicTacToeGame();
-                          }),
-                        ),
-                      ];
-
-                        return GridView.builder(
-                          shrinkWrap: true,
-                          physics: const NeverScrollableScrollPhysics(),
-                          itemCount: actions.length,
-                          gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
-                            crossAxisCount: 2,
-                            mainAxisSpacing: 12,
-                            crossAxisSpacing: 12,
-                            mainAxisExtent: 126,
-                          ),
-                          itemBuilder: (context, index) => actions[index],
-                        );
-                      },
-                    ),
+                  const SizedBox(height: 16),
+                  for (var index = 0; index < actions.length; index++) ...[
+                    actions[index],
+                    if (index != actions.length - 1) const SizedBox(height: 8),
                   ],
-                ),
+                ],
               ),
             ),
           ),
@@ -1779,6 +1761,55 @@ class _MessagesTabState extends State<MessagesTab> {
     );
   }
 
+  void _showRegionScopeSheet() {
+    final channelIdx = _selectedRecipient?.publicKey[1] ?? 0;
+    final contactsProvider = context.read<ContactsProvider>();
+    final connectionProvider = context.read<ConnectionProvider>();
+    final l10n = AppLocalizations.of(context)!;
+    final repeaters = contactsProvider.contacts
+        .where((c) => c.isRepeater)
+        .toList();
+
+    showModalBottomSheet(
+      context: context,
+      showDragHandle: true,
+      isScrollControlled: true,
+      builder: (sheetContext) {
+        return _RegionScopeSheet(
+          currentScopeName: _channelRegionScopeName,
+          repeaters: repeaters,
+          connectionProvider: connectionProvider,
+          l10n: l10n,
+          onScopeSelected: (String? name) async {
+            Navigator.of(sheetContext).pop();
+            if (name == null) {
+              // Clear scope
+              await RegionScopePreferences.clearScope(channelIdx);
+              if (!mounted) return;
+              setState(() {
+                _channelRegionScopeName = null;
+                _channelRegionScopeKey = null;
+                _channelRegionScopes.remove(channelIdx);
+              });
+              ToastLogger.success(context, l10n.regionScopeCleared);
+            } else {
+              // Set scope
+              final key = RegionScopePreferences.deriveRegionKey(name);
+              await RegionScopePreferences.setScope(channelIdx, name, key);
+              if (!mounted) return;
+              setState(() {
+                _channelRegionScopeName = name;
+                _channelRegionScopeKey = key;
+                _channelRegionScopes[channelIdx] = name;
+              });
+              ToastLogger.success(context, l10n.regionScopeSet(name));
+            }
+          },
+        );
+      },
+    );
+  }
+
   void _showFilteredMessageSearch() {
     final messagesProvider = context.read<MessagesProvider>();
     final scopedMessages = _getFilteredMessages(messagesProvider);
@@ -2065,6 +2096,7 @@ class _MessagesTabState extends State<MessagesTab> {
           channelIdx: 0,
           text: sarMessage,
           messageId: messageId,
+          floodScopeKey: _channelRegionScopeKey,
         );
 
         if (!mounted) return;
@@ -2363,6 +2395,10 @@ class _MessagesTabState extends State<MessagesTab> {
                   onStartVoiceRecording: _startVoiceRecording,
                   onStopAndSendVoice: _stopAndSendVoice,
                   onSendMessage: _sendMessage,
+                  regionScopeName: _channelRegionScopeName,
+                  onRegionScopeTap: _channelRegionScopeName != null
+                      ? _showRegionScopeSheet
+                      : null,
                 ),
               ),
             ],
@@ -2372,3 +2408,229 @@ class _MessagesTabState extends State<MessagesTab> {
     );
   }
 }
+
+/// Bottom sheet for selecting a region scope for the current channel.
+class _RegionScopeSheet extends StatefulWidget {
+  final String? currentScopeName;
+  final List<Contact> repeaters;
+  final ConnectionProvider connectionProvider;
+  final AppLocalizations l10n;
+  final ValueChanged<String?> onScopeSelected;
+
+  const _RegionScopeSheet({
+    required this.currentScopeName,
+    required this.repeaters,
+    required this.connectionProvider,
+    required this.l10n,
+    required this.onScopeSelected,
+  });
+
+  @override
+  State<_RegionScopeSheet> createState() => _RegionScopeSheetState();
+}
+
+class _RegionScopeSheetState extends State<_RegionScopeSheet> {
+  final TextEditingController _nameController = TextEditingController();
+  List<String> _discoveredRegions = [];
+  bool _isDiscovering = false;
+
+  @override
+  void dispose() {
+    _nameController.dispose();
+    super.dispose();
+  }
+
+  Future<void> _discoverRegions() async {
+    if (widget.repeaters.isEmpty) return;
+    setState(() => _isDiscovering = true);
+
+    final allRegions = <String>{};
+    for (final repeater in widget.repeaters) {
+      final regions = await RegionDiscoveryService.discoverFromRepeater(
+        repeaterPublicKey: repeater.publicKey,
+        connectionProvider: widget.connectionProvider,
+      );
+      allRegions.addAll(regions);
+    }
+
+    if (!mounted) return;
+    setState(() {
+      _discoveredRegions = allRegions.toList()..sort();
+      _isDiscovering = false;
+    });
+
+    if (_discoveredRegions.isEmpty && mounted) {
+      ToastLogger.info(context, widget.l10n.noRegionsFound);
+    }
+  }
+
+  void _submitManualName() {
+    var name = _nameController.text.trim();
+    if (name.isEmpty) return;
+    if (!name.startsWith('#')) name = '#$name';
+    if (utf8.encode(name).length > 30) return;
+    widget.onScopeSelected(name);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final colorScheme = theme.colorScheme;
+    final l10n = widget.l10n;
+
+    return SafeArea(
+      child: ConstrainedBox(
+        constraints: BoxConstraints(
+          maxHeight: MediaQuery.of(context).size.height * 0.72,
+        ),
+        child: SingleChildScrollView(
+          padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Text(
+                l10n.regionScope,
+                style: theme.textTheme.titleLarge?.copyWith(
+                  fontWeight: FontWeight.w700,
+                ),
+              ),
+              const SizedBox(height: 4),
+              Text(
+                l10n.regionScopeWarning,
+                style: theme.textTheme.bodySmall?.copyWith(
+                  color: colorScheme.onSurfaceVariant,
+                ),
+              ),
+              const SizedBox(height: 16),
+
+              // "None" option
+              _RegionOptionTile(
+                label: l10n.regionScopeNone,
+                isSelected: widget.currentScopeName == null,
+                onTap: () => widget.onScopeSelected(null),
+              ),
+              const SizedBox(height: 8),
+
+              // Manual entry
+              Row(
+                children: [
+                  Expanded(
+                    child: TextField(
+                      controller: _nameController,
+                      decoration: InputDecoration(
+                        hintText: l10n.enterRegionName,
+                        isDense: true,
+                        prefixText: '#',
+                        border: OutlineInputBorder(
+                          borderRadius: BorderRadius.circular(12),
+                        ),
+                        contentPadding: const EdgeInsets.symmetric(
+                          horizontal: 12,
+                          vertical: 10,
+                        ),
+                      ),
+                      onSubmitted: (_) => _submitManualName(),
+                    ),
+                  ),
+                  const SizedBox(width: 8),
+                  FilledButton.tonal(
+                    onPressed: _submitManualName,
+                    child: const Icon(Icons.check_rounded, size: 20),
+                  ),
+                ],
+              ),
+              const SizedBox(height: 16),
+
+              // Discover button
+              if (widget.repeaters.isNotEmpty)
+                FilledButton.tonalIcon(
+                  onPressed: _isDiscovering ? null : _discoverRegions,
+                  icon: _isDiscovering
+                      ? const SizedBox(
+                          width: 16,
+                          height: 16,
+                          child: CircularProgressIndicator(strokeWidth: 2),
+                        )
+                      : const Icon(Icons.search_rounded, size: 18),
+                  label: Text(
+                    _isDiscovering
+                        ? l10n.discoveringRegions
+                        : l10n.discoverRegions,
+                  ),
+                ),
+
+              // Discovered regions
+              if (_discoveredRegions.isNotEmpty) ...[
+                const SizedBox(height: 12),
+                for (final region in _discoveredRegions) ...[
+                  _RegionOptionTile(
+                    label: region,
+                    isSelected: widget.currentScopeName == region,
+                    onTap: () => widget.onScopeSelected(region),
+                  ),
+                  const SizedBox(height: 4),
+                ],
+              ],
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _RegionOptionTile extends StatelessWidget {
+  final String label;
+  final bool isSelected;
+  final VoidCallback onTap;
+
+  const _RegionOptionTile({
+    required this.label,
+    required this.isSelected,
+    required this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+    return Material(
+      color: isSelected
+          ? colorScheme.primaryContainer
+          : colorScheme.surfaceContainerLow,
+      borderRadius: BorderRadius.circular(12),
+      child: InkWell(
+        onTap: onTap,
+        borderRadius: BorderRadius.circular(12),
+        child: Padding(
+          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+          child: Row(
+            children: [
+              Icon(
+                isSelected
+                    ? Icons.radio_button_checked_rounded
+                    : Icons.radio_button_off_rounded,
+                size: 20,
+                color: isSelected
+                    ? colorScheme.primary
+                    : colorScheme.onSurfaceVariant,
+              ),
+              const SizedBox(width: 12),
+              Expanded(
+                child: Text(
+                  label,
+                  style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+                    fontWeight: isSelected ? FontWeight.w600 : FontWeight.w400,
+                    color: isSelected
+                        ? colorScheme.onPrimaryContainer
+                        : colorScheme.onSurface,
+                  ),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/screens/sensors_tab.dart

@@ -105,120 +105,23 @@ class _SensorsTabState extends State<SensorsTab> {
       contactsProvider,
       connectionProvider: context.read<ConnectionProvider>(),
     );
-    final searchController = TextEditingController();
-
-    try {
-      await showModalBottomSheet<void>(
-        context: context,
-        showDragHandle: true,
-        isScrollControlled: true,
-        builder: (sheetContext) {
-          if (candidates.isEmpty) {
-            return const SafeArea(
-              child: Padding(
-                padding: EdgeInsets.all(24),
-                child: Text(
-                  'No eligible nodes available. Discover a relay or node first.',
-                ),
-              ),
-            );
-          }
-
-          return StatefulBuilder(
-            builder: (context, setModalState) {
-              final query = searchController.text.trim().toLowerCase();
-              final filteredCandidates = candidates.where((contact) {
-                if (query.isEmpty) {
-                  return true;
-                }
-                return contact.displayName.toLowerCase().contains(query) ||
-                    contact.publicKeyHex.toLowerCase().contains(query);
-              }).toList();
-
-              return SafeArea(
-                child: Padding(
-                  padding: EdgeInsets.only(
-                    bottom: MediaQuery.of(context).viewInsets.bottom,
-                  ),
-                  child: ListView(
-                    shrinkWrap: true,
-                    padding: const EdgeInsets.only(bottom: 20),
-                    children: [
-                      ListTile(
-                        title: const Text(
-                          'Add sensor node',
-                          style: TextStyle(fontWeight: FontWeight.bold),
-                        ),
-                        subtitle: Text(
-                          AppLocalizations.of(
-                            context,
-                          )!.pickARelayOrNodeToWatchInSensors,
-                        ),
-                      ),
-                      Padding(
-                        padding: const EdgeInsets.fromLTRB(20, 0, 20, 12),
-                        child: TextField(
-                          controller: searchController,
-                          onChanged: (_) => setModalState(() {}),
-                          decoration: const InputDecoration(
-                            prefixIcon: Icon(Icons.search),
-                            hintText: 'Search sensors',
-                            border: OutlineInputBorder(),
-                          ),
-                        ),
-                      ),
-                      if (filteredCandidates.isEmpty)
-                        const Padding(
-                          padding: EdgeInsets.symmetric(
-                            horizontal: 20,
-                            vertical: 16,
-                          ),
-                          child: Text(
-                            'No sensor candidates match your search.',
-                          ),
-                        ),
-                      ...filteredCandidates.map(
-                        (contact) => ListTile(
-                          contentPadding: const EdgeInsets.symmetric(
-                            horizontal: 20,
-                            vertical: 4,
-                          ),
-                          leading: CircleAvatar(
-                            radius: 24,
-                            backgroundColor: const Color(0xFFDDEAF8),
-                            child: Icon(
-                              _typeIcon(contact),
-                              color: const Color(0xFF1E4F7A),
-                            ),
-                          ),
-                          title: Text(contact.displayName),
-                          subtitle: _SensorCandidatePreview(contact: contact),
-                          isThreeLine: true,
-                          onTap: () async {
-                            await sensorsProvider.addSensor(contact);
-                            if (!sheetContext.mounted) return;
-                            Navigator.of(sheetContext).pop();
-                            ScaffoldMessenger.of(context).showSnackBar(
-                              SnackBar(
-                                content: Text(
-                                  '${contact.displayName} added to Sensors',
-                                ),
-                              ),
-                            );
-                          },
-                        ),
-                      ),
-                    ],
-                  ),
-                ),
-              );
-            },
+    await showModalBottomSheet<void>(
+      context: context,
+      showDragHandle: true,
+      isScrollControlled: true,
+      builder: (sheetContext) => AddSensorSheet(
+        candidates: candidates,
+        onClose: () => Navigator.of(sheetContext).pop(),
+        onSelect: (contact) async {
+          await sensorsProvider.addSensor(contact);
+          if (!sheetContext.mounted) return;
+          Navigator.of(sheetContext).pop();
+          ScaffoldMessenger.of(context).showSnackBar(
+            SnackBar(content: Text('${contact.displayName} added to Sensors')),
           );
         },
-      );
-    } finally {
-      searchController.dispose();
-    }
+      ),
+    );
   }
 
   Future<void> _showMetricSelector(
@@ -228,7 +131,7 @@ class _SensorsTabState extends State<SensorsTab> {
   ) async {
     await Navigator.of(context).push(
       MaterialPageRoute<void>(
-        builder: (pageContext) => _SensorCustomizeView(
+        builder: (pageContext) => SensorCustomizeView(
           publicKeyHex: publicKeyHex,
           initialContact: contact,
           onRenameMetric:
@@ -474,9 +377,153 @@ class _SensorsTabState extends State<SensorsTab> {
   }
 }
 
-class _SensorCustomizeView extends StatelessWidget {
+class AddSensorSheet extends StatefulWidget {
+  final List<Contact> candidates;
+  final Future<void> Function(Contact contact) onSelect;
+  final VoidCallback onClose;
+
+  const AddSensorSheet({
+    super.key,
+    required this.candidates,
+    required this.onSelect,
+    required this.onClose,
+  });
+
+  @override
+  State<AddSensorSheet> createState() => _AddSensorSheetState();
+}
+
+class _AddSensorSheetState extends State<AddSensorSheet> {
+  final TextEditingController _searchController = TextEditingController();
+
+  @override
+  void dispose() {
+    _searchController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (widget.candidates.isEmpty) {
+      return const SafeArea(
+        child: Padding(
+          padding: EdgeInsets.all(24),
+          child: Text(
+            'No eligible nodes available. Discover a relay or node first.',
+          ),
+        ),
+      );
+    }
+
+    final l10n = AppLocalizations.of(context)!;
+    final query = _searchController.text.trim().toLowerCase();
+    final filteredCandidates = widget.candidates.where((contact) {
+      if (query.isEmpty) {
+        return true;
+      }
+      return contact.displayName.toLowerCase().contains(query) ||
+          contact.publicKeyHex.toLowerCase().contains(query);
+    }).toList();
+
+    return SafeArea(
+      child: Padding(
+        padding: EdgeInsets.only(
+          bottom: MediaQuery.of(context).viewInsets.bottom,
+        ),
+        child: SizedBox(
+          height: MediaQuery.of(context).size.height * 0.8,
+          child: Column(
+            children: [
+              Padding(
+                padding: const EdgeInsets.fromLTRB(20, 8, 12, 8),
+                child: Row(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Expanded(
+                      child: Column(
+                        crossAxisAlignment: CrossAxisAlignment.start,
+                        children: [
+                          const Text(
+                            'Add sensor node',
+                            style: TextStyle(fontWeight: FontWeight.bold),
+                          ),
+                          const SizedBox(height: 4),
+                          Text(l10n.pickARelayOrNodeToWatchInSensors),
+                        ],
+                      ),
+                    ),
+                    IconButton(
+                      onPressed: widget.onClose,
+                      tooltip: l10n.close,
+                      icon: const Icon(Icons.close),
+                    ),
+                  ],
+                ),
+              ),
+              Padding(
+                padding: const EdgeInsets.fromLTRB(20, 0, 20, 12),
+                child: TextField(
+                  controller: _searchController,
+                  onChanged: (_) => setState(() {}),
+                  decoration: const InputDecoration(
+                    prefixIcon: Icon(Icons.search),
+                    hintText: 'Search sensors',
+                    border: OutlineInputBorder(),
+                  ),
+                ),
+              ),
+              Expanded(
+                child: filteredCandidates.isEmpty
+                    ? const Padding(
+                        padding: EdgeInsets.symmetric(
+                          horizontal: 20,
+                          vertical: 16,
+                        ),
+                        child: Align(
+                          alignment: Alignment.topLeft,
+                          child: Text(
+                            'No sensor candidates match your search.',
+                          ),
+                        ),
+                      )
+                    : ListView.builder(
+                        padding: const EdgeInsets.only(bottom: 20),
+                        itemCount: filteredCandidates.length,
+                        itemBuilder: (context, index) {
+                          final contact = filteredCandidates[index];
+                          return ListTile(
+                            contentPadding: const EdgeInsets.symmetric(
+                              horizontal: 20,
+                              vertical: 4,
+                            ),
+                            leading: CircleAvatar(
+                              radius: 24,
+                              backgroundColor: const Color(0xFFDDEAF8),
+                              child: Icon(
+                                _typeIcon(contact),
+                                color: const Color(0xFF1E4F7A),
+                              ),
+                            ),
+                            title: Text(contact.displayName),
+                            subtitle: _SensorCandidatePreview(contact: contact),
+                            isThreeLine: true,
+                            onTap: () => widget.onSelect(contact),
+                          );
+                        },
+                      ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class SensorCustomizeView extends StatelessWidget {
   final String publicKeyHex;
   final Contact? initialContact;
+  final bool showLivePreview;
   final Future<void> Function({
     required BuildContext context,
     required String publicKeyHex,
@@ -485,10 +532,12 @@ class _SensorCustomizeView extends StatelessWidget {
   })
   onRenameMetric;
 
-  const _SensorCustomizeView({
+  const SensorCustomizeView({
+    super.key,
     required this.publicKeyHex,
     required this.initialContact,
     required this.onRenameMetric,
+    this.showLivePreview = true,
   });
 
   @override
@@ -533,35 +582,39 @@ class _SensorCustomizeView extends StatelessWidget {
           body: ListView(
             padding: EdgeInsets.fromLTRB(16, 16, 16, 24),
             children: [
-              _SensorCustomizeSectionCard(
-                title: AppLocalizations.of(context)!.livePreview,
-                subtitle:
-                    'Changes apply immediately. This card matches the current dashboard layout for this sensor.',
-                child: SensorTelemetryCard(
-                  contact: contact,
-                  state: sensorsProvider.stateFor(publicKeyHex),
-                  visibleFields: visibleFields,
-                  fieldOrder: sensorsProvider.metricOrderFor(
-                    publicKeyHex,
-                    visibleFields,
-                  ),
-                  labelOverrides: sensorsProvider.labelOverridesFor(
-                    publicKeyHex,
-                  ),
-                  onShowMetHistory: contact == null
-                      ? null
-                      : (contact) => showBTHomeMetHistorySheet(
-                          context,
-                          contact: contact,
+              if (showLivePreview)
+                _SensorCustomizeSectionCard(
+                  title: AppLocalizations.of(context)!.livePreview,
+                  subtitle:
+                      'Changes apply immediately. This card matches the current dashboard layout for this sensor.',
+                  child: SensorTelemetryCard(
+                    contact: contact,
+                    state: sensorsProvider.stateFor(publicKeyHex),
+                    visibleFields: visibleFields,
+                    fieldOrder: sensorsProvider.metricOrderFor(
+                      publicKeyHex,
+                      visibleFields,
+                    ),
+                    labelOverrides: sensorsProvider.labelOverridesFor(
+                      publicKeyHex,
+                    ),
+                    onShowMetHistory: contact == null
+                        ? null
+                        : (contact) => showBTHomeMetHistorySheet(
+                            context,
+                            contact: contact,
+                          ),
+                    fieldSpans: {
+                      for (final field in visibleFields)
+                        field: sensorsProvider.fieldSpanFor(
+                          publicKeyHex,
+                          field,
                         ),
-                  fieldSpans: {
-                    for (final field in visibleFields)
-                      field: sensorsProvider.fieldSpanFor(publicKeyHex, field),
-                  },
-                  margin: EdgeInsets.zero,
-                  emptyMetricsMessage: 'No telemetry fields available yet.',
+                    },
+                    margin: EdgeInsets.zero,
+                    emptyMetricsMessage: 'No telemetry fields available yet.',
+                  ),
                 ),
-              ),
               _SensorCustomizeSectionCard(
                 title: AppLocalizations.of(context)!.refreshSchedule,
                 subtitle:

lib/screens/settings_screen.dart

@@ -16,6 +16,7 @@ import '../providers/app_provider.dart';
 import '../providers/connection_provider.dart';
 import '../providers/drawing_provider.dart';
 import '../providers/map_provider.dart';
+import '../models/contact.dart';
 import '../models/config_profile.dart';
 import '../services/location_tracking_service.dart';
 import '../services/locale_preferences.dart';
@@ -79,6 +80,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
   bool _fastLocationUpdatesEnabled = false;
   double _fastLocationMovementThresholdMeters = 10.0;
   int _fastLocationActiveCadenceSeconds = 10;
+  int? _fastLocationChannelIdx;
   bool _rotateMapWithHeading = false;
   bool _showMapDebugInfo = false;
   bool _openMapInFullscreen = false;
@@ -314,6 +316,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
           _locationService.fastLocationMovementThresholdMeters;
       _fastLocationActiveCadenceSeconds =
           _locationService.fastLocationActiveCadenceSeconds;
+      _fastLocationChannelIdx = _locationService.fastLocationChannelIdx;
     });
   }
 
@@ -407,6 +410,79 @@ class _SettingsScreenState extends State<SettingsScreen> {
     });
   }
 
+  String _describeFastLocationChannel(List<Contact> channels) {
+    final channelIdx = _fastLocationChannelIdx;
+    if (channelIdx == null) {
+      return 'Not set';
+    }
+
+    for (final channel in channels) {
+      final idx = channel.publicKey.length > 1 ? channel.publicKey[1] : 0;
+      if (idx == channelIdx) {
+        return '${channel.getLocalizedDisplayName(context)} (slot $channelIdx)';
+      }
+    }
+
+    return 'Channel $channelIdx unavailable';
+  }
+
+  Future<void> _editFastLocationChannel() async {
+    final channels =
+        List<Contact>.from(context.read<ContactsProvider>().channels)
+          ..sort((a, b) {
+            final aIdx = a.publicKey.length > 1 ? a.publicKey[1] : 0;
+            final bIdx = b.publicKey.length > 1 ? b.publicKey[1] : 0;
+            return aIdx.compareTo(bIdx);
+          });
+
+    final selected = await showModalBottomSheet<int?>(
+      context: context,
+      builder: (sheetContext) => SafeArea(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            ListTile(
+              leading: const Icon(Icons.block),
+              title: const Text('Disable fast GPS publishing'),
+              trailing: _fastLocationChannelIdx == null
+                  ? const Icon(Icons.check)
+                  : null,
+              onTap: () => Navigator.pop(sheetContext, -1),
+            ),
+            for (final channel in channels)
+              ListTile(
+                leading: const Icon(Icons.tag),
+                title: Text(channel.getLocalizedDisplayName(sheetContext)),
+                subtitle: Text(
+                  'Channel ${channel.publicKey.length > 1 ? channel.publicKey[1] : 0}',
+                ),
+                trailing:
+                    _fastLocationChannelIdx ==
+                        (channel.publicKey.length > 1
+                            ? channel.publicKey[1]
+                            : 0)
+                    ? const Icon(Icons.check)
+                    : null,
+                onTap: () => Navigator.pop(
+                  sheetContext,
+                  channel.publicKey.length > 1 ? channel.publicKey[1] : 0,
+                ),
+              ),
+          ],
+        ),
+      ),
+    );
+
+    if (selected == null) return;
+    await _locationService.updateFastLocationChannelIdx(
+      selected < 0 ? null : selected,
+    );
+    if (!mounted) return;
+    setState(() {
+      _fastLocationChannelIdx = _locationService.fastLocationChannelIdx;
+    });
+  }
+
   Future<void> _saveImageMaxSize(int size) async {
     await ImagePreferences.setMaxSize(size);
     if (!mounted) return;
@@ -1463,21 +1539,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 },
               ),
             ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: Icon(Icons.timeline),
-                title: Text(
-                  AppLocalizations.of(context)!.showAllContactTrailsLabel,
-                ),
-                subtitle: const Text(
-                  'Display location trails for all contacts that have history',
-                ),
-                value: mapProvider.showAllContactTrails,
-                onChanged: (value) async {
-                  await mapProvider.toggleAllContactTrails();
-                },
-              ),
-            ),
             Consumer<MapProvider>(
               builder: (context, mapProvider, child) => SwitchListTile(
                 secondary: Icon(Icons.router_outlined),
@@ -1781,6 +1842,17 @@ class _SettingsScreenState extends State<SettingsScreen> {
               trailing: const Icon(Icons.chevron_right),
               onTap: _editFastLocationActiveCadence,
             ),
+            ListTile(
+              leading: const Icon(Icons.forum),
+              title: const Text('Fast GPS target channel'),
+              subtitle: Text(
+                _describeFastLocationChannel(
+                  context.watch<ContactsProvider>().channels,
+                ),
+              ),
+              trailing: const Icon(Icons.chevron_right),
+              onTap: _editFastLocationChannel,
+            ),
             ListTile(
               leading: Icon(Icons.location_on),
               title: Text(AppLocalizations.of(context)!.locationPermission),

lib/screens/spectrum_scan_screen.dart

@@ -1,602 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:meshcore_client/meshcore_client.dart';
-import 'package:provider/provider.dart';
-import '../models/device_info.dart';
-import '../providers/connection_provider.dart';
-import '../widgets/device/spectrum_scan_panel.dart';
-import '../l10n/app_localizations.dart';
-
-class SpectrumScanScreen extends StatefulWidget {
-  const SpectrumScanScreen({super.key});
-
-  @override
-  State<SpectrumScanScreen> createState() => _SpectrumScanScreenState();
-}
-
-class _SpectrumScanScreenState extends State<SpectrumScanScreen> {
-  static const List<String> _bandwidthOptions = [
-    '7.8 kHz',
-    '10.4 kHz',
-    '15.6 kHz',
-    '20.8 kHz',
-    '31.25 kHz',
-    '41.7 kHz',
-    '62.5 kHz',
-    '125 kHz',
-    '250 kHz',
-    '500 kHz',
-  ];
-
-  String _selectedBandwidth = '62.5 kHz';
-  bool _isSpectrumScanRunning = false;
-  bool _rangeInitialized = false;
-  String? _lastRangeSourceKey;
-  late double _scanRangeMinMhz;
-  late double _scanRangeMaxMhz;
-  late RangeValues _scanRangeValues;
-  List<SpectrumScanCandidate> _scanCandidates = const [];
-  int? _selectedScanFrequencyKhz;
-  int _completedScanSectors = 0;
-  int _totalScanSectors = 0;
-
-  List<SpectrumScanCandidate> get _recommendedScanCandidates =>
-      _scanCandidates.take(8).toList();
-
-  @override
-  void initState() {
-    super.initState();
-    final deviceInfo = _deviceInfo;
-    if (deviceInfo.radioBw != null &&
-        deviceInfo.radioBw! >= 0 &&
-        deviceInfo.radioBw! < _bandwidthOptions.length) {
-      _selectedBandwidth = _bandwidthOptions[deviceInfo.radioBw!];
-    }
-    _syncRangeFromDevice(deviceInfo);
-    _selectedScanFrequencyKhz = deviceInfo.radioFreq;
-  }
-
-  DeviceInfo get _deviceInfo => context.read<ConnectionProvider>().deviceInfo;
-
-  @override
-  void didChangeDependencies() {
-    super.didChangeDependencies();
-    _syncRangeFromDevice(context.watch<ConnectionProvider>().deviceInfo);
-  }
-
-  void _syncRangeFromDevice(DeviceInfo deviceInfo) {
-    final minKhz = deviceInfo.spectrumScanMinKhz;
-    final maxKhz = deviceInfo.spectrumScanMaxKhz;
-    late double normalizedMinMhz;
-    late double normalizedMaxMhz;
-    late String sourceKey;
-
-    if (minKhz != null && maxKhz != null && maxKhz > minKhz) {
-      final normalized = _normalizeScanRange(
-        minKhz / 1000.0,
-        maxKhz / 1000.0,
-        deviceInfo.radioFreq != null ? deviceInfo.radioFreq! / 1000.0 : null,
-      );
-      normalizedMinMhz = normalized.$1;
-      normalizedMaxMhz = normalized.$2;
-      sourceKey = 'fw:$minKhz:$maxKhz';
-    } else {
-      final normalized = _normalizeScanRange(
-        null,
-        null,
-        deviceInfo.radioFreq != null ? deviceInfo.radioFreq! / 1000.0 : null,
-      );
-      normalizedMinMhz = normalized.$1;
-      normalizedMaxMhz = normalized.$2;
-      sourceKey =
-          'fallback:${deviceInfo.radioFreq != null ? deviceInfo.radioFreq! ~/ 1000 : 869525}';
-    }
-
-    if (_rangeInitialized && _lastRangeSourceKey == sourceKey) {
-      return;
-    }
-
-    _scanRangeMinMhz = normalizedMinMhz;
-    _scanRangeMaxMhz = normalizedMaxMhz;
-
-    if (_scanRangeMaxMhz <= _scanRangeMinMhz) {
-      _scanRangeMaxMhz = _scanRangeMinMhz + 0.5;
-    }
-
-    _scanRangeValues = RangeValues(_scanRangeMinMhz, _scanRangeMaxMhz);
-    _rangeInitialized = true;
-    _lastRangeSourceKey = sourceKey;
-  }
-
-  (double, double) _normalizeScanRange(
-    double? minMhz,
-    double? maxMhz,
-    double? centerMhz,
-  ) {
-    const hardMinMhz = 800.0;
-    const hardMaxMhz = 950.0;
-    final center = centerMhz ?? 869.525;
-
-    if (minMhz != null && maxMhz != null) {
-      final clampedMin = minMhz.clamp(hardMinMhz, hardMaxMhz);
-      final clampedMax = maxMhz.clamp(hardMinMhz, hardMaxMhz);
-      if (clampedMax > clampedMin) {
-        return (clampedMin, clampedMax);
-      }
-    }
-
-    if (center >= 900.0 && center <= 930.0) {
-      return (902.0, 928.0);
-    }
-
-    return (863.0, 870.0);
-  }
-
-  double _bandwidthToKhz(String bw) {
-    switch (bw) {
-      case '7.8 kHz':
-        return 7.8;
-      case '10.4 kHz':
-        return 10.4;
-      case '15.6 kHz':
-        return 15.6;
-      case '20.8 kHz':
-        return 20.8;
-      case '31.25 kHz':
-        return 31.25;
-      case '41.7 kHz':
-        return 41.7;
-      case '62.5 kHz':
-        return 62.5;
-      case '125 kHz':
-        return 125.0;
-      case '250 kHz':
-        return 250.0;
-      case '500 kHz':
-        return 500.0;
-      default:
-        return 62.5;
-    }
-  }
-
-  String _currentParamProfile(DeviceInfo deviceInfo) {
-    final sf = deviceInfo.radioSf ?? 8;
-    final cr = deviceInfo.radioCr ?? 8;
-    return 'BW $_selectedBandwidth  |  SF$sf  |  CR 4/$cr';
-  }
-
-  String _recommendationTitle(int index) {
-    switch (index) {
-      case 0:
-        return 'Best candidate';
-      case 1:
-        return 'Alternate';
-      case 2:
-        return 'Fallback';
-      default:
-        return 'Candidate ${index + 1}';
-    }
-  }
-
-  List<int> _possibleBracketFrequenciesKhz() {
-    final bandwidthKhz = _bandwidthToKhz(_selectedBandwidth);
-    final halfBandwidthKhz = bandwidthKhz / 2.0;
-    final startKhz = (_scanRangeValues.start * 1000).round();
-    final stopKhz = (_scanRangeValues.end * 1000).round();
-    final firstCenterKhz = (startKhz + halfBandwidthKhz).round();
-    final lastCenterKhz = (stopKhz - halfBandwidthKhz).round();
-
-    if (lastCenterKhz < firstCenterKhz) {
-      return const [];
-    }
-
-    final stepKhz = bandwidthKhz >= 125.0 ? bandwidthKhz.round() : 25;
-    final centers = <int>[];
-    for (
-      var centerKhz = firstCenterKhz;
-      centerKhz <= lastCenterKhz && centers.length < 8;
-      centerKhz += stepKhz
-    ) {
-      centers.add(centerKhz);
-    }
-
-    if (centers.isEmpty || centers.last != lastCenterKhz) {
-      centers.add(lastCenterKhz);
-    }
-
-    return centers.toSet().toList()..sort();
-  }
-
-  void _resetDerivedScanResults() {
-    _scanCandidates = const [];
-    _selectedScanFrequencyKhz = null;
-  }
-
-  List<(int startKhz, int stopKhz)> _buildScanSectors(double bandwidthKhz) {
-    final startKhz = (_scanRangeValues.start * 1000).round();
-    final stopKhz = (_scanRangeValues.end * 1000).round();
-    final sectorWidthKhz = (bandwidthKhz * 24).round().clamp(250, 1200);
-    final overlapKhz = bandwidthKhz.round().clamp(8, 500);
-    final sectors = <(int startKhz, int stopKhz)>[];
-
-    var sectorStartKhz = startKhz;
-    while (sectorStartKhz < stopKhz) {
-      final sectorStopKhz = (sectorStartKhz + sectorWidthKhz).clamp(
-        sectorStartKhz + overlapKhz,
-        stopKhz,
-      );
-      sectors.add((sectorStartKhz, sectorStopKhz));
-      if (sectorStopKhz >= stopKhz) {
-        break;
-      }
-      sectorStartKhz = sectorStopKhz - overlapKhz;
-    }
-
-    return sectors;
-  }
-
-  List<SpectrumScanCandidate> _mergeSectorCandidates(
-    Iterable<SpectrumScanCandidate> candidates,
-  ) {
-    final byFrequency = <int, SpectrumScanCandidate>{};
-    for (final candidate in candidates) {
-      final existing = byFrequency[candidate.centerFrequencyKhz];
-      if (existing == null ||
-          candidate.occupancyPercent < existing.occupancyPercent ||
-          (candidate.occupancyPercent == existing.occupancyPercent &&
-              candidate.peakRssiDbm < existing.peakRssiDbm) ||
-          (candidate.occupancyPercent == existing.occupancyPercent &&
-              candidate.peakRssiDbm == existing.peakRssiDbm &&
-              candidate.avgRssiDbm < existing.avgRssiDbm)) {
-        byFrequency[candidate.centerFrequencyKhz] = candidate;
-      }
-    }
-
-    final merged = byFrequency.values.toList()
-      ..sort((a, b) {
-        final occupancyCompare = a.occupancyPercent.compareTo(
-          b.occupancyPercent,
-        );
-        if (occupancyCompare != 0) return occupancyCompare;
-        final peakCompare = a.peakRssiDbm.compareTo(b.peakRssiDbm);
-        if (peakCompare != 0) return peakCompare;
-        return a.avgRssiDbm.compareTo(b.avgRssiDbm);
-      });
-    return merged;
-  }
-
-  Future<void> _runSpectrumScan() async {
-    final connectionProvider = context.read<ConnectionProvider>();
-    final bandwidthKhz = _bandwidthToKhz(_selectedBandwidth);
-    final sectors = _buildScanSectors(bandwidthKhz);
-    final sectorCandidates = <SpectrumScanCandidate>[];
-
-    setState(() {
-      _isSpectrumScanRunning = true;
-      _resetDerivedScanResults();
-      _completedScanSectors = 0;
-      _totalScanSectors = sectors.length;
-    });
-
-    try {
-      for (var i = 0; i < sectors.length; i++) {
-        final sector = sectors[i];
-        final result = await connectionProvider.scanSpectrum(
-          startFrequencyKhz: sector.$1,
-          stopFrequencyKhz: sector.$2,
-          bandwidthKhz: bandwidthKhz.round(),
-          stepKhz: (bandwidthKhz / 2).round().clamp(1, 1000),
-          dwellMs: 160,
-          thresholdDb: 8,
-        );
-        if (result != null) {
-          sectorCandidates.addAll(result.candidates);
-          final mergedCandidates = _mergeSectorCandidates(sectorCandidates);
-          if (mounted) {
-            setState(() {
-              _scanCandidates = mergedCandidates;
-              if (_selectedScanFrequencyKhz == null &&
-                  mergedCandidates.isNotEmpty) {
-                _selectedScanFrequencyKhz =
-                    mergedCandidates.first.centerFrequencyKhz;
-              }
-              _completedScanSectors = i + 1;
-            });
-          }
-        } else if (mounted) {
-          setState(() {
-            _completedScanSectors = i + 1;
-          });
-        }
-      }
-    } finally {
-      if (mounted) {
-        setState(() {
-          _isSpectrumScanRunning = false;
-          if (_completedScanSectors == 0) {
-            _totalScanSectors = sectors.length;
-          }
-        });
-      }
-    }
-
-    if (!mounted) return;
-
-    final mergedCandidates = _mergeSectorCandidates(sectorCandidates);
-    if (mergedCandidates.isEmpty) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(AppLocalizations.of(context)!.spectrumScanReturnedNoCandidateFrequencies),
-          backgroundColor: Colors.red,
-        ),
-      );
-      return;
-    }
-
-    setState(() {
-      _scanCandidates = mergedCandidates;
-      _selectedScanFrequencyKhz = mergedCandidates.first.centerFrequencyKhz;
-    });
-  }
-
-  Future<void> _applySelectedScanFrequency() async {
-    if (_selectedScanFrequencyKhz == null) return;
-
-    final connectionProvider = context.read<ConnectionProvider>();
-    final deviceInfo = connectionProvider.deviceInfo;
-
-    await connectionProvider.setRadioParams(
-      frequency: _selectedScanFrequencyKhz!,
-      bandwidth: _bandwidthOptions.indexOf(_selectedBandwidth),
-      spreadingFactor: deviceInfo.radioSf ?? 8,
-      codingRate: deviceInfo.radioCr ?? 8,
-      repeat: deviceInfo.clientRepeat,
-    );
-    await connectionProvider.refreshDeviceInfo();
-
-    if (!mounted) return;
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(
-        content: Text(
-          'Applied ${(_selectedScanFrequencyKhz! / 1000.0).toStringAsFixed(3)} MHz',
-        ),
-        backgroundColor: Colors.green,
-      ),
-    );
-  }
-
-  int? _currentPreviewFrequencyKhz(DeviceInfo deviceInfo) {
-    if (_selectedScanFrequencyKhz != null) {
-      return _selectedScanFrequencyKhz;
-    }
-    return deviceInfo.radioFreq;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final deviceInfo = context.watch<ConnectionProvider>().deviceInfo;
-    final theme = Theme.of(context);
-    final possibleBracketFrequencies = _possibleBracketFrequenciesKhz();
-    final recommendedScanCandidates = _recommendedScanCandidates;
-    final recommendationFrequencies = recommendedScanCandidates.isNotEmpty
-        ? recommendedScanCandidates
-              .map((candidate) => candidate.centerFrequencyKhz)
-              .toList()
-        : possibleBracketFrequencies;
-
-    return Scaffold(
-      appBar: AppBar(title: Text(AppLocalizations.of(context)!.spectrumScan)),
-      body: ListView(
-        padding: const EdgeInsets.all(16),
-        children: [
-          Card(
-            child: Padding(
-              padding: const EdgeInsets.all(16),
-              child: Column(
-                crossAxisAlignment: CrossAxisAlignment.start,
-                children: [
-                  DropdownButtonFormField<String>(
-                    initialValue: _selectedBandwidth,
-                    decoration: const InputDecoration(
-                      labelText: 'Bandwidth',
-                      border: OutlineInputBorder(),
-                      helperText:
-                          'Scan and apply frequencies for this bandwidth',
-                    ),
-                    items: _bandwidthOptions.map((value) {
-                      return DropdownMenuItem<String>(
-                        value: value,
-                        child: Text(value),
-                      );
-                    }).toList(),
-                    onChanged: (value) {
-                      if (value == null) return;
-                      setState(() {
-                        _selectedBandwidth = value;
-                        _resetDerivedScanResults();
-                      });
-                    },
-                  ),
-                  const SizedBox(height: 16),
-                  Text(
-                    deviceInfo.spectrumScanMinKhz != null &&
-                            deviceInfo.spectrumScanMaxKhz != null
-                        ? 'Firmware scan range: ${_scanRangeMinMhz.toStringAsFixed(3)}-${_scanRangeMaxMhz.toStringAsFixed(3)} MHz'
-                        : 'Fallback scan range selected from current band. MeshCore commonly uses EU868 or US915.',
-                    style: theme.textTheme.bodySmall?.copyWith(
-                      color: theme.colorScheme.onSurfaceVariant,
-                    ),
-                  ),
-                  if (_isSpectrumScanRunning) ...[
-                    const SizedBox(height: 8),
-                    Text(
-                      'Scanning sector ${_completedScanSectors + 1} of $_totalScanSectors. Results update as each sector completes.',
-                      style: theme.textTheme.bodySmall?.copyWith(
-                        color: theme.colorScheme.primary,
-                        fontWeight: FontWeight.w600,
-                      ),
-                    ),
-                  ],
-                  const SizedBox(height: 12),
-                  SpectrumScanPanel(
-                    theme: theme,
-                    scanSupported: deviceInfo.supportsSpectrumScan == true,
-                    isRunning: _isSpectrumScanRunning,
-                    rangeMinMhz: _scanRangeMinMhz,
-                    rangeMaxMhz: _scanRangeMaxMhz,
-                    rangeValues: _scanRangeValues,
-                    bandwidthKhz: _bandwidthToKhz(_selectedBandwidth),
-                    selectedFrequencyKhz: _currentPreviewFrequencyKhz(
-                      deviceInfo,
-                    ),
-                    graphCandidates: _scanCandidates,
-                    selectableCandidates: recommendedScanCandidates,
-                    onRangeChanged: (values) {
-                      setState(() {
-                        _scanRangeValues = values;
-                        _resetDerivedScanResults();
-                      });
-                    },
-                    onCandidateChanged: (value) {
-                      setState(() {
-                        _selectedScanFrequencyKhz = value;
-                      });
-                    },
-                    onRunScan: _runSpectrumScan,
-                    onApplySelected: _applySelectedScanFrequency,
-                  ),
-                  if (recommendationFrequencies.isNotEmpty) ...[
-                    const SizedBox(height: 18),
-                    Text(
-                      _scanCandidates.isNotEmpty
-                          ? 'Recommended profiles'
-                          : 'Possible brackets',
-                      style: theme.textTheme.titleMedium?.copyWith(
-                        fontWeight: FontWeight.w700,
-                      ),
-                    ),
-                    const SizedBox(height: 8),
-                    Text(
-                      _scanCandidates.isNotEmpty
-                          ? 'Suggested frequencies from the latest scan with the radio parameters to keep alongside them.'
-                          : 'Usable frequency brackets derived from the selected span and bandwidth, even without live scan data.',
-                      style: theme.textTheme.bodySmall?.copyWith(
-                        color: theme.colorScheme.onSurfaceVariant,
-                      ),
-                    ),
-                    const SizedBox(height: 12),
-                    for (
-                      var i = 0;
-                      i < recommendationFrequencies.length;
-                      i++
-                    ) ...[
-                      _RecommendationTile(
-                        title: _recommendationTitle(i),
-                        frequencyKhz: recommendationFrequencies[i],
-                        candidate: recommendedScanCandidates.isNotEmpty
-                            ? recommendedScanCandidates[i]
-                            : null,
-                        bandwidthKhz: _bandwidthToKhz(_selectedBandwidth),
-                        paramsLabel: _currentParamProfile(deviceInfo),
-                        isSelected:
-                            _selectedScanFrequencyKhz ==
-                            recommendationFrequencies[i],
-                        onSelect: () {
-                          setState(() {
-                            _selectedScanFrequencyKhz =
-                                recommendationFrequencies[i];
-                          });
-                        },
-                      ),
-                      if (i != recommendationFrequencies.length - 1)
-                        const SizedBox(height: 10),
-                    ],
-                  ],
-                ],
-              ),
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-}
-
-class _RecommendationTile extends StatelessWidget {
-  final String title;
-  final int frequencyKhz;
-  final SpectrumScanCandidate? candidate;
-  final double bandwidthKhz;
-  final String paramsLabel;
-  final bool isSelected;
-  final VoidCallback onSelect;
-
-  const _RecommendationTile({
-    required this.title,
-    required this.frequencyKhz,
-    required this.candidate,
-    required this.bandwidthKhz,
-    required this.paramsLabel,
-    required this.isSelected,
-    required this.onSelect,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    final scheme = theme.colorScheme;
-
-    return InkWell(
-      onTap: onSelect,
-      borderRadius: BorderRadius.circular(14),
-      child: Container(
-        padding: const EdgeInsets.all(14),
-        decoration: BoxDecoration(
-          color: isSelected
-              ? scheme.primaryContainer.withValues(alpha: 0.55)
-              : scheme.surfaceContainerHighest.withValues(alpha: 0.35),
-          borderRadius: BorderRadius.circular(14),
-          border: Border.all(
-            color: isSelected ? scheme.primary : scheme.outlineVariant,
-          ),
-        ),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Row(
-              children: [
-                Expanded(
-                  child: Text(
-                    title,
-                    style: theme.textTheme.titleSmall?.copyWith(
-                      fontWeight: FontWeight.w700,
-                    ),
-                  ),
-                ),
-                if (isSelected)
-                  Icon(Icons.check_circle, color: scheme.primary, size: 18),
-              ],
-            ),
-            const SizedBox(height: 8),
-            Text(
-              '${(frequencyKhz / 1000.0).toStringAsFixed(3)} MHz',
-              style: theme.textTheme.headlineSmall?.copyWith(
-                fontWeight: FontWeight.w800,
-              ),
-            ),
-            const SizedBox(height: 6),
-            Text(paramsLabel, style: theme.textTheme.bodyMedium),
-            const SizedBox(height: 6),
-            Text(
-              candidate != null
-                  ? 'Occupancy ${candidate!.occupancyPercent}%  |  Avg ${candidate!.avgRssiDbm} dBm  |  Peak ${candidate!.peakRssiDbm} dBm'
-                  : 'Bracket ${(frequencyKhz / 1000.0 - bandwidthKhz / 2000.0).toStringAsFixed(3)}-${(frequencyKhz / 1000.0 + bandwidthKhz / 2000.0).toStringAsFixed(3)} MHz',
-              style: theme.textTheme.bodySmall?.copyWith(
-                color: scheme.onSurfaceVariant,
-              ),
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-}

lib/screens/welcome_wizard_screen.dart

@@ -221,14 +221,13 @@ class _WelcomeWizardScreenState extends State<WelcomeWizardScreen> {
   }
 
   Future<void> _openConnectionDialog() async {
-    await showModalBottomSheet(
-      context: context,
-      isScrollControlled: true,
-      builder: (context) => const ConnectionDialog(),
+    final connected = await showConnectionDialogFlow(
+      context,
+      offerPostConnectRepeaterDiscovery: true,
     );
     if (!mounted) return;
     final connectionProvider = context.read<ConnectionProvider>();
-    if (connectionProvider.deviceInfo.isConnected) {
+    if (connected) {
       await connectionProvider.refreshDeviceInfo();
     }
     if (!mounted) return;

lib/services/compass_support.dart

@@ -0,0 +1,11 @@
+import 'package:flutter/foundation.dart'
+    show TargetPlatform, defaultTargetPlatform, kIsWeb;
+
+class CompassSupport {
+  const CompassSupport._();
+
+  static bool get isAvailable =>
+      !kIsWeb &&
+      (defaultTargetPlatform == TargetPlatform.android ||
+          defaultTargetPlatform == TargetPlatform.iOS);
+}

lib/services/location_tracking_service.dart

@@ -49,6 +49,7 @@ class LocationTrackingService {
       'fast_location_movement_threshold_meters';
   static const String _prefKeyFastActiveCadence =
       'fast_location_active_cadence_seconds';
+  static const String _prefKeyFastChannelIdx = 'fast_location_channel_idx';
 
   String _scopedKey(String baseKey) {
     return ProfileStorageScope.scopedKey(baseKey);
@@ -79,6 +80,9 @@ class LocationTrackingService {
   /// Cadence for active-use fast GPS updates
   int fastLocationActiveCadenceSeconds = 10;
 
+  /// Target channel index for fast GPS updates; null means disabled/unset.
+  int? fastLocationChannelIdx;
+
   // ============================================================================
   // State Properties
   // ============================================================================
@@ -528,8 +532,14 @@ class LocationTrackingService {
     _refreshFastLocationTimer();
   }
 
+  Future<void> updateFastLocationChannelIdx(int? channelIdx) async {
+    fastLocationChannelIdx = channelIdx;
+    await saveSettings();
+    _refreshFastLocationTimer();
+  }
+
   void _evaluateFastLocationMovement(Position position) {
-    if (!fastLocationUpdatesEnabled) return;
+    if (!fastLocationUpdatesEnabled || fastLocationChannelIdx == null) return;
     final previous = _lastFastLocationSentPosition;
     if (previous == null) {
       _emitFastLocationUpdate(position, reason: 'initial');
@@ -552,6 +562,7 @@ class LocationTrackingService {
     _fastLocationTimer = null;
     if (!isTracking ||
         !fastLocationUpdatesEnabled ||
+        fastLocationChannelIdx == null ||
         !_isFastLocationActiveUse) {
       return;
     }
@@ -567,7 +578,7 @@ class LocationTrackingService {
   }
 
   void _emitFastLocationUpdate(Position position, {required String reason}) {
-    if (!fastLocationUpdatesEnabled) return;
+    if (!fastLocationUpdatesEnabled || fastLocationChannelIdx == null) return;
 
     final now = DateTime.now();
     final previous = _lastFastLocationSentPosition;
@@ -669,6 +680,7 @@ class LocationTrackingService {
           5,
           60,
         );
+    fastLocationChannelIdx = prefs.getInt(_scopedKey(_prefKeyFastChannelIdx));
 
     debugPrint('✅ [LocationTracking] Settings loaded');
     debugPrint('    Min distance: ${minDistanceMeters}m');
@@ -680,6 +692,7 @@ class LocationTrackingService {
       '    Fast movement threshold: ${fastLocationMovementThresholdMeters}m',
     );
     debugPrint('    Fast active cadence: ${fastLocationActiveCadenceSeconds}s');
+    debugPrint('    Fast channel idx: ${fastLocationChannelIdx ?? "unset"}');
   }
 
   /// Save settings to SharedPreferences
@@ -709,6 +722,12 @@ class LocationTrackingService {
       _scopedKey(_prefKeyFastActiveCadence),
       fastLocationActiveCadenceSeconds,
     );
+    final channelKey = _scopedKey(_prefKeyFastChannelIdx);
+    if (fastLocationChannelIdx == null) {
+      await prefs.remove(channelKey);
+    } else {
+      await prefs.setInt(channelKey, fastLocationChannelIdx!);
+    }
 
     debugPrint('✅ [LocationTracking] Settings saved');
   }

lib/services/map_workspace_snapshot_service.dart

@@ -64,7 +64,6 @@ class MapWorkspaceSnapshotService {
       showPlaceNamesOverlay: mapProvider.showPlaceNamesOverlay,
       showMunicipalityBordersOverlay:
           mapProvider.showMunicipalityBordersOverlay,
-      showAllContactTrails: mapProvider.showAllContactTrails,
       hideRepeatersOnMap: mapProvider.hideRepeatersOnMap,
     );
   }

lib/services/region_discovery_service.dart

@@ -0,0 +1,72 @@
+import 'dart:async';
+import 'dart:convert';
+import 'package:flutter/foundation.dart';
+import '../providers/connection_provider.dart';
+
+/// Discovers available regions from repeater contacts via anonymous requests.
+///
+/// The firmware repeater responds to ANON_REQ_TYPE_REGIONS (0x01) with a
+/// comma-separated list of region names that have flood allowed.
+class RegionDiscoveryService {
+  static const int _anonReqTypeRegions = 0x01;
+
+  /// Discover regions from a single repeater.
+  ///
+  /// Sends an anonymous request to the repeater and waits for the response.
+  /// Returns a list of region names (with `#` prefix).
+  /// Returns empty list on timeout or error.
+  static Future<List<String>> discoverFromRepeater({
+    required Uint8List repeaterPublicKey,
+    required ConnectionProvider connectionProvider,
+    Duration timeout = const Duration(seconds: 10),
+  }) async {
+    final result = await connectionProvider.sendAnonRequest(
+      contactPublicKey: repeaterPublicKey,
+      requestData: Uint8List.fromList([_anonReqTypeRegions]),
+    );
+    if (result == null) return [];
+
+    final tag = result.tag;
+    final completer = Completer<List<String>>();
+
+    void onResponse(Uint8List publicKeyPrefix, int responseTag, Uint8List data) {
+      if (responseTag != tag || completer.isCompleted) return;
+      completer.complete(_parseRegionResponse(data));
+    }
+
+    connectionProvider.onBinaryResponse = onResponse;
+
+    try {
+      return await completer.future.timeout(
+        timeout,
+        onTimeout: () => <String>[],
+      );
+    } catch (e) {
+      debugPrint('⚠️ [RegionDiscovery] Error discovering regions: $e');
+      return [];
+    } finally {
+      // Restore previous handler — callers should re-set if needed
+      if (connectionProvider.onBinaryResponse == onResponse) {
+        connectionProvider.onBinaryResponse = null;
+      }
+    }
+  }
+
+  /// Parse the region response payload.
+  ///
+  /// Format: [4B sender_timestamp][4B repeater_clock][comma-separated names]
+  /// Names are returned without `#` prefix from firmware; we add it back.
+  static List<String> _parseRegionResponse(Uint8List data) {
+    if (data.length <= 8) return [];
+
+    final namesStr = utf8.decode(data.sublist(8), allowMalformed: true).trim();
+    if (namesStr.isEmpty || namesStr == '-none-') return [];
+
+    return namesStr
+        .split(',')
+        .map((name) => name.trim())
+        .where((name) => name.isNotEmpty && name != '*' && !name.startsWith('\$'))
+        .map((name) => name.startsWith('#') ? name : '#$name')
+        .toList();
+  }
+}

lib/services/region_scope_preferences.dart

@@ -0,0 +1,86 @@
+import 'dart:convert';
+import 'dart:typed_data';
+import 'package:crypto/crypto.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'profiles_feature_service.dart';
+
+/// Stores per-channel region scope settings.
+///
+/// Each channel can optionally have a region scope assigned. When set, the app
+/// will set the flood scope on the device before sending channel messages so
+/// that repeaters outside the region won't forward them.
+class RegionScopePreferences {
+  static const String _namePrefix = 'region_scope_name_';
+  static const String _keyPrefix = 'region_scope_key_';
+
+  /// Get the saved scope for a channel.
+  /// Returns null if no scope is set.
+  static Future<({String name, Uint8List key})?> getScope(
+    int channelIdx,
+  ) async {
+    final prefs = await SharedPreferences.getInstance();
+    final name = prefs.getString(
+      ProfileStorageScope.scopedKey('$_namePrefix$channelIdx'),
+    );
+    final keyBase64 = prefs.getString(
+      ProfileStorageScope.scopedKey('$_keyPrefix$channelIdx'),
+    );
+    if (name == null || keyBase64 == null) return null;
+    try {
+      return (name: name, key: Uint8List.fromList(base64.decode(keyBase64)));
+    } catch (_) {
+      return null;
+    }
+  }
+
+  /// Save a region scope for a channel.
+  static Future<void> setScope(
+    int channelIdx,
+    String name,
+    Uint8List key,
+  ) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(
+      ProfileStorageScope.scopedKey('$_namePrefix$channelIdx'),
+      name,
+    );
+    await prefs.setString(
+      ProfileStorageScope.scopedKey('$_keyPrefix$channelIdx'),
+      base64.encode(key),
+    );
+  }
+
+  /// Clear the region scope for a channel.
+  static Future<void> clearScope(int channelIdx) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(
+      ProfileStorageScope.scopedKey('$_namePrefix$channelIdx'),
+    );
+    await prefs.remove(
+      ProfileStorageScope.scopedKey('$_keyPrefix$channelIdx'),
+    );
+  }
+
+  /// Clear all region scopes (all channels).
+  static Future<void> clearAllScopes() async {
+    final prefs = await SharedPreferences.getInstance();
+    final keys = prefs.getKeys();
+    for (final key in keys) {
+      if (key.contains(_namePrefix) || key.contains(_keyPrefix)) {
+        await prefs.remove(key);
+      }
+    }
+  }
+
+  /// Derive the 16-byte transport key for a region name.
+  ///
+  /// Matches firmware `TransportKeyStore::getAutoKeyFor`:
+  /// `SHA256("#regionname")` → first 16 bytes.
+  /// The name must include the leading `#` (auto-prepended if missing).
+  static Uint8List deriveRegionKey(String regionName) {
+    final normalized =
+        regionName.startsWith('#') ? regionName : '#$regionName';
+    final digest = sha256.convert(utf8.encode(normalized));
+    return Uint8List.fromList(digest.bytes.sublist(0, 16));
+  }
+}

lib/widgets/connection_dialog.dart

@@ -4,10 +4,14 @@ import 'package:provider/provider.dart';
 import '../l10n/app_localizations.dart';
 import '../providers/app_provider.dart';
 import '../providers/connection_provider.dart';
+import '../providers/contacts_provider.dart';
+import '../screens/discovery_screen.dart';
 import '../services/network_scanner_service.dart';
 import '../services/profile_workspace_coordinator.dart';
 import '../services/serial/serial_transport.dart';
 
+enum _ConnectionDialogResult { connected }
+
 Future<void> _initializeConnectedWorkspace({
   required ProfileWorkspaceCoordinator profileWorkspaceCoordinator,
   required AppProvider appProvider,
@@ -16,6 +20,64 @@ Future<void> _initializeConnectedWorkspace({
   await appProvider.initialize();
 }
 
+Future<bool> showConnectionDialogFlow(
+  BuildContext context, {
+  Color? backgroundColor,
+  bool offerPostConnectRepeaterDiscovery = false,
+}) async {
+  final result = await showModalBottomSheet<_ConnectionDialogResult>(
+    context: context,
+    isScrollControlled: true,
+    backgroundColor: backgroundColor,
+    builder: (context) => const ConnectionDialog(),
+  );
+
+  if (result != _ConnectionDialogResult.connected || !context.mounted) {
+    return result == _ConnectionDialogResult.connected;
+  }
+
+  if (!offerPostConnectRepeaterDiscovery) {
+    return true;
+  }
+
+  final contactsProvider = context.read<ContactsProvider>();
+  if (contactsProvider.repeaters.isNotEmpty) {
+    return true;
+  }
+
+  final l10n = AppLocalizations.of(context)!;
+  final openDiscovery = await showDialog<bool>(
+    context: context,
+    builder: (dialogContext) => AlertDialog(
+      title: Text(l10n.postConnectDiscoveryTitle),
+      content: Text(l10n.postConnectDiscoveryDescription),
+      actions: [
+        TextButton(
+          onPressed: () => Navigator.of(dialogContext).pop(false),
+          child: Text(l10n.continue_),
+        ),
+        FilledButton.icon(
+          onPressed: () => Navigator.of(dialogContext).pop(true),
+          icon: const Icon(Icons.router_outlined),
+          label: Text(l10n.discoverRepeaters),
+        ),
+      ],
+    ),
+  );
+
+  if (openDiscovery != true || !context.mounted) {
+    return true;
+  }
+
+  await Navigator.of(context).push(
+    MaterialPageRoute(
+      builder: (context) =>
+          const DiscoveryScreen(autoDiscoverRepeatersOnOpen: true),
+    ),
+  );
+  return true;
+}
+
 /// Connection Dialog with tabs for BLE devices and Network servers
 class ConnectionDialog extends StatefulWidget {
   const ConnectionDialog({super.key});
@@ -33,6 +95,7 @@ class _ConnectionDialogState extends State<ConnectionDialog>
   int _scannedCount = 0;
   int _totalToScan = 0;
   int _lastTabIndex = 0;
+  bool _hasRequestedBleScan = false;
   String? _connectingToServerKey;
   String? _connectingBleDeviceId;
 
@@ -40,10 +103,6 @@ class _ConnectionDialogState extends State<ConnectionDialog>
     if (_tabController.index == _lastTabIndex) return;
     _lastTabIndex = _tabController.index;
 
-    if (_tabController.index == 0) {
-      _refreshBleDevices();
-    }
-
     if (_tabController.index == 1) {
       if (_networkScanner.hasCachedResults && _discoveredServers.isEmpty) {
         setState(() {
@@ -65,11 +124,6 @@ class _ConnectionDialogState extends State<ConnectionDialog>
       listen: false,
     );
 
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      if (!mounted) return;
-      _refreshBleDevices();
-    });
-
     _networkScanner.onServerDiscovered = (server) {
       if (!mounted) return;
       setState(() {
@@ -110,6 +164,13 @@ class _ConnectionDialogState extends State<ConnectionDialog>
   }
 
   Future<void> _refreshBleDevices() async {
+    if (!_hasRequestedBleScan && mounted) {
+      setState(() {
+        _hasRequestedBleScan = true;
+      });
+    } else {
+      _hasRequestedBleScan = true;
+    }
     await _connectionProvider.stopScan();
     if (!mounted) return;
     await _connectionProvider.startScan();
@@ -121,6 +182,45 @@ class _ConnectionDialogState extends State<ConnectionDialog>
     return Colors.red;
   }
 
+  Future<void> _handleSuccessfulConnection() async {
+    final appProvider = context.read<AppProvider>();
+    final profileWorkspaceCoordinator = context
+        .read<ProfileWorkspaceCoordinator>();
+
+    await _initializeConnectedWorkspace(
+      profileWorkspaceCoordinator: profileWorkspaceCoordinator,
+      appProvider: appProvider,
+    );
+
+    if (!mounted) return;
+    Navigator.of(context).pop(_ConnectionDialogResult.connected);
+  }
+
+  String _normalizeConnectionError(Object error) {
+    var message = error.toString();
+    if (message.startsWith('Exception: ')) {
+      message = message.substring('Exception: '.length);
+    }
+    if (message.startsWith('Connection failed: Exception: ')) {
+      return message.substring('Connection failed: Exception: '.length);
+    }
+    if (message.startsWith('Connection failed: ')) {
+      return message.substring('Connection failed: '.length);
+    }
+    return message;
+  }
+
+  void _showConnectionError(Object error) {
+    if (!mounted) return;
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(_normalizeConnectionError(error)),
+        backgroundColor: Colors.red,
+        duration: const Duration(seconds: 5),
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final connectionProvider = context.watch<ConnectionProvider>();
@@ -401,11 +501,13 @@ class _ConnectionDialogState extends State<ConnectionDialog>
   }
 
   Widget _buildBleDevicesTab(ConnectionProvider connectionProvider) {
+    final l10n = AppLocalizations.of(context)!;
+
     return Column(
       children: [
         _buildSectionBanner(
           icon: Icons.bluetooth_searching_rounded,
-          message: AppLocalizations.of(context)!.defaultPinInfo,
+          message: l10n.defaultPinInfo,
           onRefresh: _refreshBleDevices,
         ),
         if (connectionProvider.error != null)
@@ -418,8 +520,10 @@ class _ConnectionDialogState extends State<ConnectionDialog>
               : connectionProvider.scannedDevices.isEmpty
               ? _buildEmptyState(
                   icon: Icons.bluetooth_searching_rounded,
-                  title: AppLocalizations.of(context)!.noDevicesFound,
-                  actionLabel: AppLocalizations.of(context)!.scanAgain,
+                  title: _hasRequestedBleScan
+                      ? l10n.noDevicesFound
+                      : 'Press scan to search for nearby devices',
+                  actionLabel: _hasRequestedBleScan ? l10n.scanAgain : 'Scan',
                   onAction: _refreshBleDevices,
                 )
               : ListView.builder(
@@ -434,25 +538,25 @@ class _ConnectionDialogState extends State<ConnectionDialog>
                     final isConnecting = _connectingBleDeviceId == deviceId;
 
                     Future<void> connectBle() async {
-                      final appProvider = context.read<AppProvider>();
-                      final profileWorkspaceCoordinator = context
-                          .read<ProfileWorkspaceCoordinator>();
                       setState(() {
                         _connectingBleDeviceId = deviceId;
                       });
                       try {
-                        Navigator.pop(context);
                         final success = await connectionProvider.connect(
                           device,
                         );
-                        if (success &&
-                            connectionProvider.deviceInfo.isConnected) {
-                          await _initializeConnectedWorkspace(
-                            profileWorkspaceCoordinator:
-                                profileWorkspaceCoordinator,
-                            appProvider: appProvider,
+                        if (!success) {
+                          final name = device.platformName.isNotEmpty
+                              ? device.platformName
+                              : 'device';
+                          throw Exception(
+                            connectionProvider.error ??
+                                'Failed to connect to $name',
                           );
                         }
+                        await _handleSuccessfulConnection();
+                      } catch (error) {
+                        _showConnectionError(error);
                       } finally {
                         if (mounted) {
                           setState(() {
@@ -547,11 +651,6 @@ class _ConnectionDialogState extends State<ConnectionDialog>
                     Future<void> connectServer() async {
                       final connectionProvider = context
                           .read<ConnectionProvider>();
-                      final appProvider = context.read<AppProvider>();
-                      final profileWorkspaceCoordinator = context
-                          .read<ProfileWorkspaceCoordinator>();
-                      final navigator = Navigator.of(context);
-                      final messenger = ScaffoldMessenger.of(context);
 
                       setState(() {
                         _connectingToServerKey = serverKey;
@@ -567,52 +666,23 @@ class _ConnectionDialogState extends State<ConnectionDialog>
                           );
                         }
 
-                        await connectionProvider.connectTcp(
+                        final success = await connectionProvider.connectTcp(
                           server.ipAddress,
                           server.port,
                         );
-                        await _initializeConnectedWorkspace(
-                          profileWorkspaceCoordinator:
-                              profileWorkspaceCoordinator,
-                          appProvider: appProvider,
-                        );
-
-                        if (mounted) {
-                          navigator.pop();
+                        if (!success) {
+                          throw Exception(
+                            connectionProvider.error ??
+                                'Failed to connect to ${server.ipAddress}:${server.port}',
+                          );
                         }
+                        await _handleSuccessfulConnection();
                       } catch (e) {
                         if (!mounted) return;
                         setState(() {
                           _connectingToServerKey = null;
                         });
-
-                        var errorMessage = e.toString();
-                        if (errorMessage.startsWith('Exception: ')) {
-                          errorMessage = errorMessage.substring(
-                            'Exception: '.length,
-                          );
-                        }
-                        if (errorMessage.startsWith(
-                          'Connection failed: Exception: ',
-                        )) {
-                          errorMessage = errorMessage.substring(
-                            'Connection failed: Exception: '.length,
-                          );
-                        } else if (errorMessage.startsWith(
-                          'Connection failed: ',
-                        )) {
-                          errorMessage = errorMessage.substring(
-                            'Connection failed: '.length,
-                          );
-                        }
-
-                        messenger.showSnackBar(
-                          SnackBar(
-                            content: Text(errorMessage),
-                            backgroundColor: Colors.red,
-                            duration: const Duration(seconds: 5),
-                          ),
-                        );
+                        _showConnectionError(e);
                       }
                     }
 
@@ -679,8 +749,10 @@ class _ConnectionDialogState extends State<ConnectionDialog>
             actionLabel: actionLabel,
             onAction: onAction,
           ),
-      onConnected: () {
-        if (mounted) Navigator.of(context).pop();
+      onConnected: (result) {
+        if (mounted) {
+          Navigator.of(context).pop(result);
+        }
       },
     );
   }
@@ -706,7 +778,7 @@ typedef _EmptyStateBuilder =
     });
 
 class _SerialDeviceList extends StatefulWidget {
-  final VoidCallback onConnected;
+  final ValueChanged<_ConnectionDialogResult> onConnected;
   final _TransportCardBuilder buildTransportCard;
   final _EmptyStateBuilder buildEmptyState;
 
@@ -801,9 +873,6 @@ class _SerialDeviceListState extends State<_SerialDeviceList> {
     setState(() => _isConnecting = true);
     try {
       final connectionProvider = context.read<ConnectionProvider>();
-      final appProvider = context.read<AppProvider>();
-      final profileWorkspaceCoordinator = context
-          .read<ProfileWorkspaceCoordinator>();
       final connection = await _transport.connect(device);
       final success = await connectionProvider.connectSerial(
         service: connection.service,
@@ -815,10 +884,11 @@ class _SerialDeviceListState extends State<_SerialDeviceList> {
 
       if (success) {
         await _initializeConnectedWorkspace(
-          profileWorkspaceCoordinator: profileWorkspaceCoordinator,
-          appProvider: appProvider,
+          profileWorkspaceCoordinator: context
+              .read<ProfileWorkspaceCoordinator>(),
+          appProvider: context.read<AppProvider>(),
         );
-        widget.onConnected();
+        widget.onConnected(_ConnectionDialogResult.connected);
       } else {
         await connection.disconnect();
         connection.service.dispose();

lib/widgets/device/spectrum_scan_panel.dart

@@ -1,387 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:meshcore_client/meshcore_client.dart';
-import '../../l10n/app_localizations.dart';
-
-class SpectrumScanPanel extends StatelessWidget {
-  final ThemeData theme;
-  final bool scanSupported;
-  final bool isRunning;
-  final double rangeMinMhz;
-  final double rangeMaxMhz;
-  final RangeValues rangeValues;
-  final double bandwidthKhz;
-  final int? selectedFrequencyKhz;
-  final List<SpectrumScanCandidate> graphCandidates;
-  final List<SpectrumScanCandidate> selectableCandidates;
-  final ValueChanged<RangeValues> onRangeChanged;
-  final ValueChanged<int?> onCandidateChanged;
-  final VoidCallback onRunScan;
-  final VoidCallback onApplySelected;
-
-  const SpectrumScanPanel({
-    super.key,
-    required this.theme,
-    required this.scanSupported,
-    required this.isRunning,
-    required this.rangeMinMhz,
-    required this.rangeMaxMhz,
-    required this.rangeValues,
-    required this.bandwidthKhz,
-    required this.selectedFrequencyKhz,
-    required this.graphCandidates,
-    required this.selectableCandidates,
-    required this.onRangeChanged,
-    required this.onCandidateChanged,
-    required this.onRunScan,
-    required this.onApplySelected,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    return Container(
-      padding: const EdgeInsets.all(14),
-      decoration: BoxDecoration(
-        color: theme.colorScheme.surfaceContainerHighest.withValues(
-          alpha: 0.45,
-        ),
-        borderRadius: BorderRadius.circular(18),
-        border: Border.all(color: theme.colorScheme.outlineVariant),
-      ),
-      child: Column(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: [
-          Row(
-            children: [
-              Icon(Icons.tune, color: theme.colorScheme.primary),
-              const SizedBox(width: 10),
-              Expanded(
-                child: Text(
-                  'Power Scan',
-                  style: theme.textTheme.titleMedium?.copyWith(
-                    fontWeight: FontWeight.w700,
-                  ),
-                ),
-              ),
-              FilledButton.icon(
-                onPressed: scanSupported && !isRunning ? onRunScan : null,
-                icon: isRunning
-                    ? const SizedBox(
-                        width: 16,
-                        height: 16,
-                        child: CircularProgressIndicator(strokeWidth: 2),
-                      )
-                    : const Icon(Icons.radar),
-                label: Text(
-                  scanSupported
-                      ? (isRunning ? 'Scanning' : 'Scan')
-                      : 'Unavailable',
-                ),
-              ),
-            ],
-          ),
-          const SizedBox(height: 8),
-          Text(
-            scanSupported
-                ? 'Full range with bandwidth footprint. Firmware enforces hardware band limits and pauses the mesh while scanning.'
-                : 'Full range with bandwidth footprint. This companion does not support spectrum scan mode, so scanning is disabled.',
-            style: theme.textTheme.bodySmall?.copyWith(
-              color: theme.colorScheme.onSurfaceVariant,
-            ),
-          ),
-          const SizedBox(height: 14),
-          _FrequencyRangePreview(
-            minMhz: rangeMinMhz,
-            maxMhz: rangeMaxMhz,
-            selectedRange: rangeValues,
-            selectedBandwidthKhz: bandwidthKhz,
-            selectedFrequencyKhz: selectedFrequencyKhz,
-            candidates: graphCandidates,
-          ),
-          const SizedBox(height: 10),
-          Wrap(
-            spacing: 14,
-            runSpacing: 6,
-            children: [
-              _LegendChip(
-                color: theme.colorScheme.primary,
-                label: AppLocalizations.of(context)!.quiet,
-              ),
-              _LegendChip(
-                color: Colors.orange,
-                label: AppLocalizations.of(context)!.moderate,
-              ),
-              _LegendChip(
-                color: theme.colorScheme.error,
-                label: AppLocalizations.of(context)!.busy,
-              ),
-            ],
-          ),
-          const SizedBox(height: 10),
-          Row(
-            mainAxisAlignment: MainAxisAlignment.spaceBetween,
-            children: [
-              Text(
-                '${rangeValues.start.toStringAsFixed(3)} MHz',
-                style: theme.textTheme.labelMedium,
-              ),
-              Text(
-                '${rangeValues.end.toStringAsFixed(3)} MHz',
-                style: theme.textTheme.labelMedium,
-              ),
-            ],
-          ),
-          RangeSlider(
-            values: rangeValues,
-            min: rangeMinMhz,
-            max: rangeMaxMhz,
-            divisions: (((rangeMaxMhz - rangeMinMhz) * 20).round()).clamp(
-              1,
-              400,
-            ),
-            labels: RangeLabels(
-              rangeValues.start.toStringAsFixed(3),
-              rangeValues.end.toStringAsFixed(3),
-            ),
-            onChanged: onRangeChanged,
-          ),
-          if (selectableCandidates.isEmpty) ...[
-            const SizedBox(height: 6),
-            Container(
-              width: double.infinity,
-              padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
-              decoration: BoxDecoration(
-                color: theme.colorScheme.surfaceContainerLow,
-                borderRadius: BorderRadius.circular(12),
-                border: Border.all(color: theme.colorScheme.outlineVariant),
-              ),
-              child: Text(
-                scanSupported
-                    ? 'No scan results yet. Adjust the range and run a scan to populate candidate frequencies.'
-                    : 'Spectrum preview only. This companion can display the configured span, but cannot scan for open channels.',
-                style: theme.textTheme.bodySmall?.copyWith(
-                  color: theme.colorScheme.onSurfaceVariant,
-                ),
-              ),
-            ),
-          ] else ...[
-            const SizedBox(height: 10),
-            DropdownButtonFormField<int>(
-              initialValue: selectedFrequencyKhz,
-              isExpanded: true,
-              decoration: const InputDecoration(
-                labelText: 'Candidate frequency',
-                border: OutlineInputBorder(),
-                helperText: 'Best frequencies for the current bandwidth',
-              ),
-              items: selectableCandidates.map((candidate) {
-                return DropdownMenuItem<int>(
-                  value: candidate.centerFrequencyKhz,
-                  child: Column(
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    mainAxisSize: MainAxisSize.min,
-                    children: [
-                      Text(
-                        '${candidate.centerFrequencyMhz.toStringAsFixed(3)} MHz',
-                        overflow: TextOverflow.ellipsis,
-                      ),
-                      Text(
-                        '${candidate.occupancyPercent}% occupied  |  peak ${candidate.peakRssiDbm} dBm',
-                        style: theme.textTheme.bodySmall?.copyWith(
-                          color: theme.colorScheme.onSurfaceVariant,
-                        ),
-                        overflow: TextOverflow.ellipsis,
-                      ),
-                    ],
-                  ),
-                );
-              }).toList(),
-              selectedItemBuilder: (context) {
-                return selectableCandidates.map((candidate) {
-                  return Align(
-                    alignment: Alignment.centerLeft,
-                    child: Text(
-                      '${candidate.centerFrequencyMhz.toStringAsFixed(3)} MHz',
-                      overflow: TextOverflow.ellipsis,
-                    ),
-                  );
-                }).toList();
-              },
-              onChanged: onCandidateChanged,
-            ),
-            const SizedBox(height: 10),
-            Align(
-              alignment: Alignment.centerRight,
-              child: OutlinedButton.icon(
-                onPressed: selectedFrequencyKhz == null
-                    ? null
-                    : onApplySelected,
-                icon: Icon(Icons.north_east),
-                label: Text(AppLocalizations.of(context)!.useSelectedFrequency),
-              ),
-            ),
-          ],
-        ],
-      ),
-    );
-  }
-}
-
-class _LegendChip extends StatelessWidget {
-  final Color color;
-  final String label;
-
-  const _LegendChip({required this.color, required this.label});
-
-  @override
-  Widget build(BuildContext context) {
-    return Row(
-      mainAxisSize: MainAxisSize.min,
-      children: [
-        Container(
-          width: 10,
-          height: 10,
-          decoration: BoxDecoration(color: color, shape: BoxShape.circle),
-        ),
-        const SizedBox(width: 6),
-        Text(label, style: Theme.of(context).textTheme.labelMedium),
-      ],
-    );
-  }
-}
-
-class _FrequencyRangePreview extends StatelessWidget {
-  final double minMhz;
-  final double maxMhz;
-  final RangeValues selectedRange;
-  final double selectedBandwidthKhz;
-  final int? selectedFrequencyKhz;
-  final List<SpectrumScanCandidate> candidates;
-
-  const _FrequencyRangePreview({
-    required this.minMhz,
-    required this.maxMhz,
-    required this.selectedRange,
-    required this.selectedBandwidthKhz,
-    required this.selectedFrequencyKhz,
-    required this.candidates,
-  });
-
-  double _positionFor(double mhz) {
-    final span = maxMhz - minMhz;
-    if (span <= 0) return 0;
-    return ((mhz - minMhz) / span).clamp(0.0, 1.0);
-  }
-
-  Color _candidateColor(BuildContext context, int occupancyPercent) {
-    final scheme = Theme.of(context).colorScheme;
-    if (occupancyPercent <= 10) return scheme.primary;
-    if (occupancyPercent <= 35) return Colors.orange;
-    return scheme.error;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final scheme = Theme.of(context).colorScheme;
-    final spanMhz = maxMhz - minMhz;
-    final selectedFreqMhz = selectedFrequencyKhz != null
-        ? selectedFrequencyKhz! / 1000.0
-        : null;
-    final bwMhz = selectedBandwidthKhz / 1000.0;
-
-    return LayoutBuilder(
-      builder: (context, constraints) {
-        final width = constraints.maxWidth;
-        final rangeLeft = _positionFor(selectedRange.start) * width;
-        final rangeRight = _positionFor(selectedRange.end) * width;
-
-        double? bwLeft;
-        double? bwWidth;
-        if (selectedFreqMhz != null && spanMhz > 0) {
-          bwLeft = _positionFor(selectedFreqMhz - (bwMhz / 2)) * width;
-          final bwRight = _positionFor(selectedFreqMhz + (bwMhz / 2)) * width;
-          bwWidth = (bwRight - bwLeft).clamp(4.0, width);
-        }
-
-        return Container(
-          height: 108,
-          decoration: BoxDecoration(
-            borderRadius: BorderRadius.circular(16),
-            color: scheme.surfaceContainerLow,
-            border: Border.all(color: scheme.outlineVariant),
-          ),
-          child: Stack(
-            children: [
-              Positioned.fill(
-                child: Padding(
-                  padding: const EdgeInsets.symmetric(
-                    horizontal: 10,
-                    vertical: 12,
-                  ),
-                  child: DecoratedBox(
-                    decoration: BoxDecoration(
-                      borderRadius: BorderRadius.circular(12),
-                      color: scheme.surfaceContainerHigh,
-                    ),
-                  ),
-                ),
-              ),
-              Positioned(
-                left: rangeLeft,
-                top: 12,
-                width: (rangeRight - rangeLeft).clamp(8.0, width),
-                height: 56,
-                child: DecoratedBox(
-                  decoration: BoxDecoration(
-                    borderRadius: BorderRadius.circular(12),
-                    color: scheme.primaryContainer,
-                    border: Border.all(color: scheme.primary),
-                  ),
-                ),
-              ),
-              if (bwLeft != null && bwWidth != null)
-                Positioned(
-                  left: bwLeft,
-                  top: 28,
-                  width: bwWidth,
-                  height: 24,
-                  child: DecoratedBox(
-                    decoration: BoxDecoration(
-                      borderRadius: BorderRadius.circular(999),
-                      color: scheme.tertiaryContainer,
-                      border: Border.all(color: scheme.tertiary),
-                    ),
-                  ),
-                ),
-              for (final candidate in candidates)
-                Positioned(
-                  left: (_positionFor(candidate.centerFrequencyMhz) * width)
-                      .clamp(10.0, width - 18.0),
-                  top: 72,
-                  child: Column(
-                    children: [
-                      Container(
-                        width: 10,
-                        height: 10,
-                        decoration: BoxDecoration(
-                          shape: BoxShape.circle,
-                          color: _candidateColor(
-                            context,
-                            candidate.occupancyPercent,
-                          ),
-                        ),
-                      ),
-                      const SizedBox(height: 4),
-                      Text(
-                        candidate.centerFrequencyMhz.toStringAsFixed(3),
-                        style: Theme.of(context).textTheme.labelSmall,
-                      ),
-                    ],
-                  ),
-                ),
-            ],
-          ),
-        );
-      },
-    );
-  }
-}

lib/widgets/map/detailed_compass_dialog.dart

@@ -1,9 +1,11 @@
 import 'dart:async';
 import 'dart:math';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart' show MissingPluginException;
 import 'package:geolocator/geolocator.dart';
 import 'package:flutter_compass/flutter_compass.dart';
 import 'package:latlong2/latlong.dart';
+import '../../services/compass_support.dart';
 import '../../models/contact.dart';
 import '../../models/sar_marker.dart';
 import '../common/location_display.dart';
@@ -90,17 +92,33 @@ class _DetailedCompassDialogState extends State<DetailedCompassDialog> {
       });
     }
 
-    // Subscribe to compass updates
-    final compassStream = FlutterCompass.events;
+    // Subscribe to compass updates on supported targets only.
+    final compassStream = CompassSupport.isAvailable
+        ? FlutterCompass.events
+        : null;
     if (compassStream != null) {
-      _compassSubscription = compassStream.listen((event) {
-        if (mounted && event.heading != null) {
-          setState(() {
-            _currentHeading = event.heading;
-            _compassAccuracy = event.accuracy;
-          });
-        }
-      });
+      _compassSubscription = compassStream.listen(
+        (event) {
+          if (mounted && event.heading != null) {
+            setState(() {
+              _currentHeading = event.heading;
+              _compassAccuracy = event.accuracy;
+            });
+          }
+        },
+        onError: (Object error, StackTrace stackTrace) {
+          if (!mounted) {
+            return;
+          }
+
+          if (error is MissingPluginException) {
+            debugPrint('Compass plugin is unavailable on this platform');
+            return;
+          }
+
+          debugPrint('Compass dialog stream error: $error');
+        },
+      );
     }
 
     // Subscribe to position updates

lib/widgets/map/trail_controls.dart

@@ -1,11 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import '../../models/contact.dart';
 import '../../models/location_trail.dart';
 import '../../providers/map_provider.dart';
-import '../../providers/contacts_provider.dart';
 import '../../services/gpx_service.dart';
-import '../../services/trail_color_service.dart';
 import '../../l10n/app_localizations.dart';
 
 /// Trail management controls widget
@@ -14,17 +11,8 @@ class TrailControls extends StatelessWidget {
 
   void _showTrailMenu(BuildContext context) {
     final mapProvider = Provider.of<MapProvider>(context, listen: false);
-    final contactsProvider = Provider.of<ContactsProvider>(
-      context,
-      listen: false,
-    );
     final l10n = AppLocalizations.of(context)!;
 
-    // Get contacts with trails (advertHistory >= 2 points)
-    final contactsWithTrails = contactsProvider.contactsWithLocation
-        .where((c) => c.advertHistory.length >= 2)
-        .toList();
-
     showModalBottomSheet(
       context: context,
       isScrollControlled: true,
@@ -183,110 +171,6 @@ class TrailControls extends StatelessWidget {
                     ),
                   ),
 
-                const SizedBox(height: 8),
-                const Divider(),
-                const SizedBox(height: 8),
-
-                // Contact Trails Section
-                Row(
-                  children: [
-                    const Icon(Icons.people, size: 20),
-                    SizedBox(width: 8),
-                    Text(
-                      l10n.contactTrails,
-                      style: const TextStyle(
-                        fontSize: 18,
-                        fontWeight: FontWeight.bold,
-                      ),
-                    ),
-                  ],
-                ),
-                const SizedBox(height: 12),
-
-                // Show All Contact Trails toggle
-                SwitchListTile(
-                  secondary: Icon(Icons.route),
-                  title: Text(l10n.showAllContactTrails),
-                  subtitle: Text(
-                    contactsWithTrails.isEmpty
-                        ? l10n.noContactsWithLocationHistory
-                        : mapProvider.showAllContactTrails
-                        ? l10n.showingTrailsForContacts(
-                            contactsWithTrails.length,
-                          )
-                        : l10n.individualContactTrails,
-                  ),
-                  value: mapProvider.showAllContactTrails,
-                  onChanged: contactsWithTrails.isNotEmpty
-                      ? (value) {
-                          mapProvider.toggleAllContactTrails();
-                          setModalState(() {}); // Update modal UI
-                        }
-                      : null, // Disable if no contacts with trails
-                ),
-
-                // Individual contact trails (when "show all" is OFF)
-                if (!mapProvider.showAllContactTrails &&
-                    contactsWithTrails.isNotEmpty)
-                  ExpansionTile(
-                    title: Text(l10n.individualContactTrails),
-                    initiallyExpanded: false,
-                    children: contactsWithTrails.map((contact) {
-                      final trailColor = TrailColorService.getTrailColor(
-                        contact,
-                      );
-                      final isVisible = mapProvider.isContactPathVisible(
-                        contact.publicKeyHex,
-                      );
-
-                      return SwitchListTile(
-                        // Color indicator with emoji
-                        secondary: Row(
-                          mainAxisSize: MainAxisSize.min,
-                          children: [
-                            if (contact.roleEmoji != null)
-                              Text(
-                                contact.roleEmoji!,
-                                style: const TextStyle(fontSize: 18),
-                              ),
-                            const SizedBox(width: 4),
-                            Container(
-                              width: 16,
-                              height: 16,
-                              decoration: BoxDecoration(
-                                color: trailColor,
-                                border: Border.all(
-                                  color: Colors.white,
-                                  width: 2,
-                                ),
-                                borderRadius: BorderRadius.circular(3),
-                              ),
-                            ),
-                          ],
-                        ),
-                        title: Row(
-                          children: [
-                            Expanded(child: Text(contact.displayName)),
-                            IconButton(
-                              tooltip: l10n.exportToClipboard,
-                              icon: const Icon(Icons.file_download_outlined),
-                              onPressed: () =>
-                                  _exportContactTrail(context, contact),
-                            ),
-                          ],
-                        ),
-                        subtitle: Text(
-                          '${contact.advertHistory.length} points',
-                        ),
-                        value: isVisible,
-                        onChanged: (value) {
-                          mapProvider.toggleContactPath(contact.publicKeyHex);
-                          setModalState(() {}); // Update modal UI
-                        },
-                      );
-                    }).toList(),
-                  ),
-
                 const SizedBox(height: 8),
 
                 // Close button
@@ -360,34 +244,6 @@ class TrailControls extends StatelessWidget {
     }
   }
 
-  Future<void> _exportContactTrail(BuildContext context, Contact contact) async {
-    await _exportTrail(
-      context,
-      _buildContactTrail(contact),
-      customName: '${contact.displayName} Trail',
-    );
-  }
-
-  LocationTrail _buildContactTrail(Contact contact) {
-    final sortedHistory = [...contact.advertHistory]
-      ..sort((a, b) => a.timestamp.compareTo(b.timestamp));
-
-    return LocationTrail(
-      id: 'contact_${contact.publicKeyHex}',
-      isActive: false,
-      startTime: sortedHistory.first.timestamp,
-      endTime: sortedHistory.last.timestamp,
-      points: sortedHistory
-          .map(
-            (advert) => TrailPoint(
-              position: advert.location,
-              timestamp: advert.timestamp,
-            ),
-          )
-          .toList(),
-    );
-  }
-
   void _showClearConfirmation(
     BuildContext context,
     MapProvider mapProvider,

lib/widgets/messages/messages_composer.dart

@@ -27,6 +27,8 @@ class MessagesComposer extends StatelessWidget {
   final Future<void> Function() onStartVoiceRecording;
   final Future<void> Function() onStopAndSendVoice;
   final Future<void> Function() onSendMessage;
+  final String? regionScopeName;
+  final VoidCallback? onRegionScopeTap;
 
   const MessagesComposer({
     super.key,
@@ -49,6 +51,8 @@ class MessagesComposer extends StatelessWidget {
     required this.onStartVoiceRecording,
     required this.onStopAndSendVoice,
     required this.onSendMessage,
+    this.regionScopeName,
+    this.onRegionScopeTap,
   });
 
   @override
@@ -102,6 +106,14 @@ class MessagesComposer extends StatelessWidget {
                                 ? onStopAndSendVoice
                                 : onShowComposerActions,
                           ),
+                          if (regionScopeName != null &&
+                              onRegionScopeTap != null) ...[
+                            const SizedBox(width: 6),
+                            _RegionScopeChip(
+                              name: regionScopeName!,
+                              onTap: onRegionScopeTap!,
+                            ),
+                          ],
                           const SizedBox(width: 8),
                           Expanded(
                             child: _DestinationSelector(
@@ -534,3 +546,52 @@ class _SendButton extends StatelessWidget {
     );
   }
 }
+
+class _RegionScopeChip extends StatelessWidget {
+  final String name;
+  final VoidCallback onTap;
+
+  const _RegionScopeChip({required this.name, required this.onTap});
+
+  @override
+  Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+    return GestureDetector(
+      onTap: onTap,
+      child: Container(
+        height: 40,
+        padding: const EdgeInsets.symmetric(horizontal: 10),
+        decoration: BoxDecoration(
+          color: colorScheme.tertiaryContainer,
+          borderRadius: BorderRadius.circular(20),
+          border: Border.all(
+            color: colorScheme.tertiary.withValues(alpha: 0.3),
+          ),
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Icon(
+              Icons.language_rounded,
+              size: 16,
+              color: colorScheme.onTertiaryContainer,
+            ),
+            const SizedBox(width: 4),
+            ConstrainedBox(
+              constraints: const BoxConstraints(maxWidth: 80),
+              child: Text(
+                name,
+                style: TextStyle(
+                  fontSize: 12,
+                  fontWeight: FontWeight.w600,
+                  color: colorScheme.onTertiaryContainer,
+                ),
+                overflow: TextOverflow.ellipsis,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/widgets/messages/recipient_selector_sheet.dart

@@ -18,6 +18,9 @@ class RecipientSelectorSheet extends StatefulWidget {
   final bool showAllOption;
   final Function(String type, Contact? recipient) onSelect;
 
+  /// Region scope names per channel index (e.g. {0: "#auckland"}).
+  final Map<int, String> channelRegionScopes;
+
   const RecipientSelectorSheet({
     super.key,
     required this.contacts,
@@ -29,6 +32,7 @@ class RecipientSelectorSheet extends StatefulWidget {
     this.currentRecipientPublicKey,
     this.showAllOption = true,
     required this.onSelect,
+    this.channelRegionScopes = const {},
   });
 
   @override
@@ -165,13 +169,18 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
 
   String _channelSubtitle(BuildContext context, Contact channel) {
     final l10n = AppLocalizations.of(context)!;
+    final channelIdx = channel.publicKey.length > 1 ? channel.publicKey[1] : 0;
+    final scopeName = widget.channelRegionScopes[channelIdx];
+
     if (channel.isPublicChannel) {
-      return l10n.broadcastToAllNearby;
+      return scopeName != null
+          ? '${l10n.broadcastToAllNearby} • $scopeName'
+          : l10n.broadcastToAllNearby;
     }
 
-    final channelIdx = channel.publicKey.length > 1 ? channel.publicKey[1] : 0;
     final shortKey = channel.publicKeyShort.toUpperCase();
-    return '${l10n.channel} $channelIdx • $shortKey';
+    final base = '${l10n.channel} $channelIdx • $shortKey';
+    return scopeName != null ? '$base • $scopeName' : base;
   }
 
   bool _isDenseSection(String type) => type == 'channel' || type == 'contact';

pubspec.lock

@@ -827,8 +827,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: main
-      resolved-ref: "71902401e9a6bc7d2ed1193f8961e7256646ab76"
+      ref: a0deff8
+      resolved-ref: a0deff80fcbca974f0e18fe47971b76bec583109
       url: "https://github.com/dz0ny/meshcore_client.git"
     source: git
     version: "0.1.0"

pubspec.yaml

@@ -44,7 +44,7 @@ dependencies:
   meshcore_client:
     git:
       url: https://github.com/dz0ny/meshcore_client.git
-      ref: main
+      ref: a0deff8
 
   # Codec2 ultra-low-bitrate speech codec (FFI plugin)
   codec2_flutter:

test/screens/discovery_screen_test.dart

@@ -38,6 +38,7 @@ Future<void> _pumpDiscoveryScreen(
   WidgetTester tester, {
   ContactsProvider? contactsProvider,
   ConnectionProvider? connectionProvider,
+  DiscoveryScreen screen = const DiscoveryScreen(),
 }) async {
   final resolvedContactsProvider = contactsProvider ?? ContactsProvider();
   final resolvedConnectionProvider =
@@ -56,7 +57,7 @@ Future<void> _pumpDiscoveryScreen(
       child: MaterialApp(
         localizationsDelegates: AppLocalizations.localizationsDelegates,
         supportedLocales: AppLocalizations.supportedLocales,
-        home: const DiscoveryScreen(),
+        home: screen,
       ),
     ),
   );
@@ -113,6 +114,21 @@ void main() {
     },
   );
 
+  testWidgets('auto discovery can trigger repeater discovery on open', (
+    tester,
+  ) async {
+    final connectionProvider = _FakeConnectionProvider(isConnected: true);
+
+    await _pumpDiscoveryScreen(
+      tester,
+      connectionProvider: connectionProvider,
+      screen: const DiscoveryScreen(autoDiscoverRepeatersOnOpen: true),
+    );
+
+    expect(connectionProvider.discoveredAdvertTypes, [2]);
+    expect(find.text('Repeater discovery sent'), findsOneWidget);
+  });
+
   testWidgets('search and inline type filters narrow discovered nodes', (
     tester,
   ) async {

test/screens/sensors_tab_test.dart

@@ -4,27 +4,16 @@ import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:meshcore_sar_app/l10n/app_localizations.dart';
 import 'package:meshcore_sar_app/models/contact.dart';
-import 'package:meshcore_sar_app/providers/contacts_provider.dart';
-import 'package:meshcore_sar_app/providers/sensors_provider.dart';
 import 'package:meshcore_sar_app/screens/sensors_tab.dart';
-import 'package:provider/provider.dart';
-import 'package:shared_preferences/shared_preferences.dart';
+import 'package:meshcore_sar_app/widgets/sensors/sensor_telemetry_card.dart';
 
 void main() {
-  setUp(() {
-    SharedPreferences.setMockInitialValues({});
-  });
-
-  Future<void> waitUntilLoaded(SensorsProvider provider) async {
-    for (var i = 0; i < 20 && !provider.isLoaded; i++) {
-      await Future<void>.delayed(Duration.zero);
-    }
-    expect(provider.isLoaded, isTrue);
-  }
-
-  Contact buildSensorContact() {
+  Contact buildSensorContact({
+    int firstByte = 0x44,
+    String name = 'WX Station',
+  }) {
     final publicKey = Uint8List(32);
-    publicKey[0] = 0x44;
+    publicKey[0] = firstByte;
 
     return Contact(
       publicKey: publicKey,
@@ -32,7 +21,7 @@ void main() {
       flags: 0,
       outPathLen: 0,
       outPath: Uint8List(64),
-      advName: 'WX Station',
+      advName: name,
       lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
       advLat: 0,
       advLon: 0,
@@ -50,48 +39,84 @@ void main() {
     );
   }
 
-  testWidgets('customize action opens full customization view', (tester) async {
+  testWidgets('metric selector item shows channel-specific preview', (
+    tester,
+  ) async {
     final contact = buildSensorContact();
-    final sensorsProvider = SensorsProvider();
-    final contactsProvider = ContactsProvider();
-
-    await waitUntilLoaded(sensorsProvider);
-    contactsProvider.addOrUpdateContact(contact);
-    await sensorsProvider.addSensor(contact);
+    final option = sensorMetricOptionsFor(contact, labelOverrides: const {})
+        .firstWhere(
+          (entry) => entry.key.contains('illuminance') && entry.channel == 2,
+        );
 
     await tester.pumpWidget(
-      MultiProvider(
-        providers: [
-          ChangeNotifierProvider<ContactsProvider>.value(
-            value: contactsProvider,
+      MaterialApp(
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: Scaffold(
+          body: SensorMetricSelectorItem(
+            option: option,
+            visible: true,
+            span: 1,
+            canMoveUp: false,
+            canMoveDown: false,
+            onToggle: (_) {},
+            onRename: () {},
+            onSpanChanged: (_) {},
           ),
-          ChangeNotifierProvider<SensorsProvider>.value(value: sensorsProvider),
-        ],
-        child: MaterialApp(
-          localizationsDelegates: AppLocalizations.localizationsDelegates,
-          supportedLocales: AppLocalizations.supportedLocales,
-          home: const SensorsTab(),
         ),
       ),
     );
     await tester.pump();
 
-    await tester.tap(find.byIcon(Icons.more_vert));
-    await tester.pump();
-    await tester.pump(const Duration(milliseconds: 300));
-    await tester.tap(find.text('Customize fields'));
-    await tester.pump();
-    await tester.pump(const Duration(milliseconds: 300));
-
-    expect(find.text('Customize WX Station'), findsOneWidget);
-    expect(find.text('Live preview'), findsOneWidget);
-    expect(find.text('Refresh schedule'), findsOneWidget);
     expect(
-      find.byKey(
-        const ValueKey('sensor_selector_metric_channel_extra:illuminance_2'),
-      ),
+      find.byKey(ValueKey('sensor_selector_metric_${option.key}')),
       findsOneWidget,
     );
     expect(find.text('Channel 2'), findsOneWidget);
   });
+
+  testWidgets('add sensor sheet keeps close action available when scrolled', (
+    tester,
+  ) async {
+    tester.view.physicalSize = const Size(320, 480);
+    tester.view.devicePixelRatio = 1;
+    addTearDown(tester.view.reset);
+
+    var didClose = false;
+    final candidates = List<Contact>.generate(
+      20,
+      (index) =>
+          buildSensorContact(firstByte: index + 1, name: 'Sensor ${index + 1}'),
+    );
+
+    await tester.pumpWidget(
+      MaterialApp(
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: Scaffold(
+          body: AddSensorSheet(
+            candidates: candidates,
+            onSelect: (_) async {},
+            onClose: () {
+              didClose = true;
+            },
+          ),
+        ),
+      ),
+    );
+    await tester.pump();
+
+    final closeButton = find.byTooltip('Close');
+    expect(closeButton, findsOneWidget);
+
+    await tester.drag(find.byType(ListView).last, const Offset(0, -600));
+    await tester.pump();
+
+    expect(closeButton, findsOneWidget);
+
+    await tester.tap(closeButton);
+    await tester.pump();
+
+    expect(didClose, isTrue);
+  });
 }

test/services/compass_support_test.dart

@@ -0,0 +1,23 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/services/compass_support.dart';
+
+void main() {
+  tearDown(() {
+    debugDefaultTargetPlatformOverride = null;
+  });
+
+  test('reports compass support only on mobile targets', () {
+    debugDefaultTargetPlatformOverride = TargetPlatform.android;
+    expect(CompassSupport.isAvailable, isTrue);
+
+    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+    expect(CompassSupport.isAvailable, isTrue);
+
+    debugDefaultTargetPlatformOverride = TargetPlatform.macOS;
+    expect(CompassSupport.isAvailable, isFalse);
+
+    debugDefaultTargetPlatformOverride = TargetPlatform.windows;
+    expect(CompassSupport.isAvailable, isFalse);
+  });
+}

test/services/location_tracking_service_test.dart

@@ -0,0 +1,40 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import 'package:meshcore_sar_app/services/location_tracking_service.dart';
+import 'package:meshcore_sar_app/services/profiles_feature_service.dart';
+
+void main() {
+  final service = LocationTrackingService();
+
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+    ProfileStorageScope.setScope(
+      profilesEnabled: false,
+      activeProfileId: 'default',
+    );
+    service.fastLocationUpdatesEnabled = false;
+    service.fastLocationMovementThresholdMeters = 10.0;
+    service.fastLocationActiveCadenceSeconds = 10;
+    service.fastLocationChannelIdx = null;
+  });
+
+  test('persists and restores fast location channel idx', () async {
+    await service.updateFastLocationChannelIdx(3);
+
+    service.fastLocationChannelIdx = null;
+    await service.loadSettings();
+
+    expect(service.fastLocationChannelIdx, 3);
+  });
+
+  test('clears persisted fast location channel idx when unset', () async {
+    await service.updateFastLocationChannelIdx(7);
+    await service.updateFastLocationChannelIdx(null);
+
+    service.fastLocationChannelIdx = 99;
+    await service.loadSettings();
+
+    expect(service.fastLocationChannelIdx, isNull);
+  });
+}

test/widgets/connection_dialog_test.dart

@@ -0,0 +1,67 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/providers/connection_provider.dart';
+import 'package:meshcore_sar_app/widgets/connection_dialog.dart';
+import 'package:provider/provider.dart';
+
+class _FakeConnectionProvider extends ConnectionProvider {
+  int startScanCalls = 0;
+  int stopScanCalls = 0;
+  bool _isScanning = false;
+
+  @override
+  bool get isScanning => _isScanning;
+
+  @override
+  List<ScannedDevice> get scannedDevices => const [];
+
+  @override
+  String? get error => null;
+
+  @override
+  Future<void> startScan() async {
+    startScanCalls += 1;
+    _isScanning = true;
+    notifyListeners();
+  }
+
+  @override
+  Future<void> stopScan() async {
+    stopScanCalls += 1;
+    _isScanning = false;
+    notifyListeners();
+  }
+}
+
+void main() {
+  testWidgets('BLE scan waits for explicit user action', (tester) async {
+    final connectionProvider = _FakeConnectionProvider();
+
+    await tester.pumpWidget(
+      ChangeNotifierProvider<ConnectionProvider>.value(
+        value: connectionProvider,
+        child: MaterialApp(
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: const Scaffold(body: ConnectionDialog()),
+        ),
+      ),
+    );
+
+    await tester.pump();
+
+    expect(connectionProvider.startScanCalls, 0);
+    expect(
+      find.text('Press scan to search for nearby devices'),
+      findsOneWidget,
+    );
+    expect(find.text('Scan'), findsOneWidget);
+
+    await tester.tap(find.widgetWithText(FilledButton, 'Scan'));
+    await tester.pump();
+
+    expect(connectionProvider.stopScanCalls, 1);
+    expect(connectionProvider.startScanCalls, 1);
+  });
+}