data exporting & importing

lib/pages/settings/app.dart

@@ -86,6 +86,36 @@ class _AppSettingsState extends State<AppSettings> {
           },
           actionTitle: 'Set'.tl,
         ).toSliver(),
+        _CallbackSetting(
+          title: "Export App Data".tl,
+          callback: () async {
+            var controller = showLoadingDialog(context);
+            var file = await exportAppData();
+            await saveFile(filename: "data.venera", file: file);
+            controller.close();
+          },
+          actionTitle: 'Export'.tl,
+        ).toSliver(),
+        _CallbackSetting(
+          title: "Import App Data".tl,
+          callback: () async {
+            var controller = showLoadingDialog(context);
+            var file = await selectFile(ext: ['venera']);
+            if(file != null) {
+              var cacheFile = File(FilePath.join(App.cachePath, "temp.venera"));
+              await file.saveTo(cacheFile.path);
+              try {
+                await importAppData(cacheFile);
+              }
+              catch(e, s) {
+                Log.error("Import data", e.toString(), s);
+                context.showMessage(message: "Failed to import data".tl);
+              }
+            }
+            controller.close();
+          },
+          actionTitle: 'Import'.tl,
+        ).toSliver(),
         _SettingPartTitle(
           title: "Log".tl,
           icon: Icons.error_outline,

lib/pages/settings/appearance.dart

@@ -21,6 +21,9 @@ class _AppearanceSettingsState extends State<AppearanceSettings> {
             "light": "Light".tl,
             "dark": "Dark".tl,
           },
+          onChanged: () async {
+            App.forceRebuild();
+          },
         ).toSliver(),
         SelectSetting(
           title: "Theme Color".tl,

lib/pages/settings/setting_components.dart

@@ -434,7 +434,7 @@ class _CallbackSetting extends StatelessWidget {
     return ListTile(
       title: Text(title),
       subtitle: subtitle == null ? null : Text(subtitle!),
-      trailing: FilledButton(
+      trailing: Button.normal(
         onPressed: callback,
         child: Text(actionTitle),
       ).fixHeight(28),

lib/pages/settings/settings_page.dart

@@ -14,6 +14,7 @@ import 'package:venera/foundation/consts.dart';
 import 'package:venera/foundation/local.dart';
 import 'package:venera/foundation/log.dart';
 import 'package:venera/network/app_dio.dart';
+import 'package:venera/utils/data.dart';
 import 'package:venera/utils/io.dart';
 import 'package:venera/utils/translations.dart';
 import 'package:yaml/yaml.dart';