add auto clock synchronization setting after repeater login

Introduced a new setting for automatic clock synchronization after a successful repeater login.
Added localization support for the new feature in multiple languages (Bulgarian, German, English, Spanish, French, Hungarian, Italian, Japanese, Korean, Dutch, Polish, Portuguese, Russian, Slovak, Slovenian, Swedish, Ukrainian, Chinese).
Implemented storage service methods to manage the new setting.
Updated the repeater settings screen to include a toggle for the new feature.
Enhanced the repeater login dialog to trigger clock synchronization automatically if the setting is enabled.

lib/widgets/repeater_login_dialog.dart

@@ -187,6 +187,29 @@ class _RepeaterLoginDialogState extends State<RepeaterLoginDialog> {
         await _storage.removeRepeaterPassword(widget.repeater.publicKeyHex);
       }
 
+      final autoClockSync = await _storage
+          .getRepeaterAutoClockSyncAfterLoginEnabled(
+            widget.repeater.publicKeyHex,
+          );
+      if (autoClockSync) {
+        try {
+          final timestampSeconds =
+              DateTime.now().millisecondsSinceEpoch ~/ 1000;
+          await _connector.sendFrame(
+            buildSendCliCommandFrame(
+              repeater.publicKey,
+              'clock sync',
+              timestampSeconds: timestampSeconds,
+            ),
+          );
+        } catch (e) {
+          appLogger.warn(
+            'Auto clock sync failed for ${repeater.name}: $e',
+            tag: 'RepeaterLogin',
+          );
+        }
+      }
+
       if (mounted) {
         Navigator.pop(context, password);
         Future.microtask(() => widget.onLogin(password));