feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>

mobile/test/shared/reminders/remind_me_later_sheet_test.dart

@@ -0,0 +1,128 @@
+import 'package:buzz/shared/reminders/remind_me_later_sheet.dart';
+import 'package:buzz/shared/reminders/reminder_service.dart';
+import 'package:buzz/shared/relay/relay.dart';
+import 'package:buzz/shared/theme/theme.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:nostr/nostr.dart' as nostr;
+
+const _target = ReminderTarget(
+  eventId: 'msg-1',
+  channelId: 'chan-1',
+  preview: 'hello',
+  authorPubkey: 'alice',
+);
+
+/// Records createReminder calls; throws when [error] is set.
+class _RecordingReminderService extends ReminderService {
+  final Object? error;
+  final List<int> submittedNotBefore = [];
+
+  _RecordingReminderService({this.error})
+    : super(
+        signedEventRelay: SignedEventRelay(
+          session: RelaySessionNotifier(),
+          nsec: nostr.Keys.generate().nsec,
+        ),
+        crypto: _stubCrypto(),
+      );
+
+  @override
+  Future<void> createReminder({
+    required ReminderTarget target,
+    required int notBefore,
+    String? note,
+  }) async {
+    final error = this.error;
+    if (error != null) throw error;
+    submittedNotBefore.add(notBefore);
+  }
+}
+
+ReminderCrypto _stubCrypto() {
+  final keys = nostr.Keys.generate();
+  return ReminderCrypto(keys.nsec, keys.public);
+}
+
+Future<void> _pumpSheet(
+  WidgetTester tester, {
+  required ReminderService service,
+}) async {
+  await tester.pumpWidget(
+    ProviderScope(
+      overrides: [reminderServiceProvider.overrideWithValue(service)],
+      child: MaterialApp(
+        theme: AppTheme.light(),
+        home: Scaffold(
+          body: Consumer(
+            builder: (context, ref, _) => TextButton(
+              onPressed: () => showRemindMeLaterSheet(
+                context: context,
+                ref: ref,
+                target: _target,
+              ),
+              child: const Text('open'),
+            ),
+          ),
+        ),
+      ),
+    ),
+  );
+  await tester.tap(find.text('open'));
+  await tester.pumpAndSettle();
+}
+
+void main() {
+  group('showRemindMeLaterSheet', () {
+    testWidgets('cancelling the custom date picker keeps the reminder sheet '
+        'open', (tester) async {
+      final service = _RecordingReminderService();
+      await _pumpSheet(tester, service: service);
+
+      await tester.ensureVisible(find.text('Pick a date & time'));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('Pick a date & time'));
+      await tester.pumpAndSettle();
+
+      // Native date picker is up; cancel it.
+      await tester.tap(find.text('Cancel'));
+      await tester.pumpAndSettle();
+
+      // The preset sheet stays open for a retry, and nothing was submitted.
+      expect(find.text('Remind me about this message'), findsOneWidget);
+      expect(find.text('Pick a date & time'), findsOneWidget);
+      expect(service.submittedNotBefore, isEmpty);
+    });
+
+    testWidgets('preset submission failure shows stable copy without the '
+        'raw error', (tester) async {
+      final service = _RecordingReminderService(
+        error: Exception('nip44 conversation key mismatch'),
+      );
+      await _pumpSheet(tester, service: service);
+
+      await tester.tap(find.text('In 1 hour'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('Couldn’t set reminder. Try again.'), findsOneWidget);
+      expect(
+        find.textContaining('nip44 conversation key mismatch'),
+        findsNothing,
+      );
+    });
+
+    testWidgets('preset submission success confirms with a snackbar', (
+      tester,
+    ) async {
+      final service = _RecordingReminderService();
+      await _pumpSheet(tester, service: service);
+
+      await tester.tap(find.text('In 1 hour'));
+      await tester.pumpAndSettle();
+
+      expect(service.submittedNotBefore, hasLength(1));
+      expect(find.text('Reminder set'), findsOneWidget);
+    });
+  });
+}

mobile/test/shared/reminders/reminder_service_test.dart

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+import 'dart:convert';
+
+import 'package:buzz/shared/reminders/reminder_service.dart';
+import 'package:buzz/shared/reminders/reminder_time_presets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:nostr/nostr.dart' as nostr;
+
+void main() {
+  const target = ReminderTarget(
+    eventId: 'event-1',
+    channelId: 'channel-1',
+    preview: 'hello world',
+    authorPubkey: 'author-pk',
+  );
+
+  group('buildReminderPlaintext', () {
+    test('matches the desktop NIP-ER content shape', () {
+      final plaintext = buildReminderPlaintext(target: target, note: 'ping');
+      expect(jsonDecode(plaintext), {
+        'target': {
+          'eventId': 'event-1',
+          'channelId': 'channel-1',
+          'preview': 'hello world',
+          'authorPubkey': 'author-pk',
+        },
+        'note': 'ping',
+        'status': 'pending',
+      });
+    });
+
+    test('omits note when absent or empty', () {
+      for (final note in [null, '']) {
+        final decoded =
+            jsonDecode(buildReminderPlaintext(target: target, note: note))
+                as Map<String, dynamic>;
+        expect(decoded.containsKey('note'), isFalse);
+        expect(decoded['status'], 'pending');
+      }
+    });
+  });
+
+  group('randomReminderDTag', () {
+    test('is 32 lowercase hex chars (128 bits)', () {
+      final dTag = randomReminderDTag();
+      expect(dTag, matches(RegExp(r'^[0-9a-f]{32}$')));
+    });
+
+    test('is unique across calls', () {
+      expect(randomReminderDTag(), isNot(randomReminderDTag()));
+    });
+  });
+
+  group('buildReminderTags', () {
+    test('emits d and strict-decimal not_before tags', () {
+      expect(buildReminderTags(dTag: 'abc', notBefore: 1753000000), [
+        ['d', 'abc'],
+        ['not_before', '1753000000'],
+      ]);
+    });
+
+    test('rejects negative timestamps', () {
+      expect(
+        () => buildReminderTags(dTag: 'abc', notBefore: -1),
+        throwsArgumentError,
+      );
+    });
+  });
+
+  group('ReminderCrypto', () {
+    test('encrypts to self and decrypts back', () {
+      final keys = nostr.Keys.generate();
+      final crypto = ReminderCrypto(keys.nsec, keys.public);
+
+      const plaintext = '{"status":"pending","note":"hi"}';
+      final ciphertext = crypto.encrypt(plaintext);
+      expect(ciphertext, isNot(contains('pending')));
+      expect(crypto.decrypt(ciphertext), plaintext);
+    });
+  });
+
+  group('reminder time presets', () {
+    test('presets resolve strictly in the future', () {
+      final now = DateTime.now().millisecondsSinceEpoch ~/ 1000;
+      for (final preset in reminderTimePresets) {
+        expect(preset.getTimestamp(), greaterThan(now), reason: preset.label);
+      }
+    });
+
+    test('nextDayAt9am rolls past instants forward', () {
+      final tenAm = DateTime(2026, 7, 25, 10);
+      final next = nextDayAt9am(0, now: tenAm);
+      expect(
+        DateTime.fromMillisecondsSinceEpoch(next * 1000),
+        DateTime(2026, 7, 26, 9),
+      );
+    });
+
+    test('nextDayAt9am keeps future same-day instants', () {
+      final eightAm = DateTime(2026, 7, 25, 8);
+      final next = nextDayAt9am(0, now: eightAm);
+      expect(
+        DateTime.fromMillisecondsSinceEpoch(next * 1000),
+        DateTime(2026, 7, 25, 9),
+      );
+    });
+
+    test('daysUntilNextMonday is 1-7 and lands on Monday', () {
+      for (var day = 20; day < 27; day++) {
+        final now = DateTime(2026, 7, day);
+        final days = daysUntilNextMonday(now);
+        expect(days, inInclusiveRange(1, 7));
+        expect(now.add(Duration(days: days)).weekday, DateTime.monday);
+      }
+    });
+
+    test('combineCustomDateTime rejects past instants', () {
+      final yesterday = DateTime.now().subtract(const Duration(days: 1));
+      expect(combineCustomDateTime(yesterday, 9, 0), isNull);
+
+      final tomorrow = DateTime.now().add(const Duration(days: 1));
+      expect(combineCustomDateTime(tomorrow, 9, 0), isNotNull);
+    });
+  });
+}