autoconnect on fly mode (does not work yet)

app/lib/services/database/app_settings_repository.dart

@@ -23,6 +23,7 @@ class AppSettingsRepository {
         String? connectionWifiHost,
         int connectionWifiPort,
         String connectionWifiSsidPrefix,
+        String? connectionWifiLastSsid,
       })> load() async {
     final row = await (_db.select(_db.appSettingsTable)
           ..where((s) => s.id.equals(_rowId)))
@@ -40,6 +41,7 @@ class AppSettingsRepository {
       connectionWifiPort: row?.connectionWifiPort ?? kDefaultWifiPort,
       connectionWifiSsidPrefix:
           row?.connectionWifiSsidPrefix ?? kDefaultWifiSsidPrefix,
+      connectionWifiLastSsid: row?.connectionWifiLastSsid,
     );
   }
 
@@ -119,6 +121,18 @@ class AppSettingsRepository {
     ));
   }
 
+  /// Exakte SSID der zuletzt erfolgreich verbundenen mLRS-Bruecke (Doku
+  /// Abschnitt 8), oder null solange noch nie erfolgreich verbunden wurde.
+  Future<String?> loadConnectionWifiLastSsid() async =>
+      (await load()).connectionWifiLastSsid;
+
+  Future<void> setConnectionWifiLastSsid(String? ssid) async {
+    await _upsert(AppSettingsTableCompanion(
+      id: const Value(_rowId),
+      connectionWifiLastSsid: Value(ssid),
+    ));
+  }
+
   Future<void> _upsert(AppSettingsTableCompanion companion) async {
     await _db.into(_db.appSettingsTable).insertOnConflictUpdate(companion);
   }