bluetooth connectivity layer added

app/lib/services/database/app_settings_repository.dart

@@ -12,13 +12,21 @@ class AppSettingsRepository {
 
   static const _rowId = 0;
 
-  Future<({int? activeDroneProfileId, int? currentMissionId})> load() async {
+  Future<
+      ({
+        int? activeDroneProfileId,
+        int? currentMissionId,
+        String? connectionDeviceAddress,
+        bool connectionAutoConnect,
+      })> load() async {
     final row = await (_db.select(_db.appSettingsTable)
           ..where((s) => s.id.equals(_rowId)))
         .getSingleOrNull();
     return (
       activeDroneProfileId: row?.activeDroneProfileId,
       currentMissionId: row?.currentMissionId,
+      connectionDeviceAddress: row?.connectionDeviceAddress,
+      connectionAutoConnect: row?.connectionAutoConnect ?? true,
     );
   }
 
@@ -36,6 +44,26 @@ class AppSettingsRepository {
     ));
   }
 
+  /// Gemerkte Bluetooth-MAC-Adresse (Doku Kommunikationsschicht 3.2a), oder
+  /// null um die Erinnerung zu loeschen (z.B. nach "Geraet entkoppeln").
+  Future<String?> loadConnectionDeviceAddress() async =>
+      (await load()).connectionDeviceAddress;
+
+  Future<void> setConnectionDeviceAddress(String? address) async {
+    await _upsert(AppSettingsTableCompanion(
+      id: const Value(_rowId),
+      connectionDeviceAddress: Value(address),
+    ));
+  }
+
+  /// "Beim Wechsel in Fly automatisch verbinden" (Doku 7), Standard an.
+  Future<void> setConnectionAutoConnect(bool value) async {
+    await _upsert(AppSettingsTableCompanion(
+      id: const Value(_rowId),
+      connectionAutoConnect: Value(value),
+    ));
+  }
+
   Future<void> _upsert(AppSettingsTableCompanion companion) async {
     await _db.into(_db.appSettingsTable).insertOnConflictUpdate(companion);
   }