feat: replace json tools with local data controls

lib/src/widgets/dialogs.dart

@@ -1,9 +1,6 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 
-import '../core/json_utils.dart';
 import '../l10n/l10n.dart';
-import '../models/app_state.dart';
 
 Future<void> showHabitDialog(
   BuildContext context,
@@ -123,64 +120,16 @@ Future<void> confirmDeleteHabit(
   );
 }
 
-Future<void> showExportDialog(BuildContext context, AppState state) async {
-  final scaffoldContext = context;
-  final export = prettyJson(state.toJson());
-  await showDialog<void>(
-    context: context,
-    builder:
-        (context) => AlertDialog(
-          title: Text(context.l10n.exportJson),
-          content: SizedBox(
-            width: double.maxFinite,
-            child: SingleChildScrollView(
-              child: SelectableText(
-                export,
-                style: const TextStyle(fontFamily: 'monospace'),
-              ),
-            ),
-          ),
-          actions: [
-            TextButton(
-              onPressed: () => Navigator.pop(context),
-              child: Text(context.l10n.close),
-            ),
-            FilledButton.icon(
-              onPressed: () async {
-                final message = context.l10n.exportCopied;
-                await Clipboard.setData(ClipboardData(text: export));
-                if (context.mounted) {
-                  Navigator.pop(context);
-                  showSnack(scaffoldContext, message);
-                }
-              },
-              icon: const Icon(Icons.copy),
-              label: Text(context.l10n.copy),
-            ),
-          ],
-        ),
-  );
-}
-
-Future<void> showImportDialog(
+Future<void> confirmClearToday(
   BuildContext context,
-  ValueChanged<String> onImport,
+  VoidCallback onConfirm,
 ) async {
-  var value = '';
   await showDialog<void>(
     context: context,
     builder:
         (context) => AlertDialog(
-          title: Text(context.l10n.importJson),
-          content: TextFormField(
-            minLines: 8,
-            maxLines: 12,
-            onChanged: (nextValue) => value = nextValue,
-            decoration: InputDecoration(
-              border: const OutlineInputBorder(),
-              hintText: context.l10n.importHint,
-            ),
-          ),
+          title: Text(context.l10n.clearTodayDataTitle),
+          content: Text(context.l10n.clearTodayDataBody),
           actions: [
             TextButton(
               onPressed: () => Navigator.pop(context),
@@ -188,10 +137,10 @@ Future<void> showImportDialog(
             ),
             FilledButton(
               onPressed: () {
-                onImport(value);
+                onConfirm();
                 Navigator.pop(context);
               },
-              child: Text(context.l10n.import),
+              child: Text(context.l10n.clearToday),
             ),
           ],
         ),
@@ -206,19 +155,23 @@ Future<void> confirmClearData(
     context: context,
     builder:
         (context) => AlertDialog(
-          title: Text(context.l10n.clearDataTitle),
-          content: Text(context.l10n.clearDataBody),
+          title: Text(context.l10n.clearAllDataTitle),
+          content: Text(context.l10n.clearAllDataBody),
           actions: [
             TextButton(
               onPressed: () => Navigator.pop(context),
               child: Text(context.l10n.cancel),
             ),
             FilledButton(
+              style: FilledButton.styleFrom(
+                backgroundColor: Theme.of(context).colorScheme.error,
+                foregroundColor: Theme.of(context).colorScheme.onError,
+              ),
               onPressed: () {
                 onConfirm();
                 Navigator.pop(context);
               },
-              child: Text(context.l10n.clear),
+              child: Text(context.l10n.deleteAll),
             ),
           ],
         ),