chore: 初始化脚手架 — sunny_mochi 企业级 Flutter 模板

Core 基础设施：Flavor 三包体系、Drift+SQLCipher 加密数据库 7 拦截器 Dio 网络栈、CrashReporter 崩溃日志、Sealed Failure 错误体系 5 色板主题系统、Auth 认证骨架（Clean Architecture）、Dev Panel、Mock Adapter 通过验证：flutter analyze（0 errors）、flutter test（全绿）、staging APK 74.8MB
2026-05-14 12:51:05 +08:00
commit 61017f1c39
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+import 'dart:async';
+
+import 'package:flutter/foundation.dart' show ValueNotifier;
+import 'package:sunny_mochi/core/observability/talker_setup.dart';
+import 'package:sunny_mochi/core/storage/secure_storage.dart'
+    show secureStorageProvider;
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'auth_status_provider.g.dart';
+
+/// 同步可读的登录态门面 — 给 GoRouter `redirect` 用。
+///
+/// 三态语义：
+/// - `null`  → 启动期未知（异步 storage 还没读完，redirect 应不动）
+/// - `true`  → 已登录
+/// - `false` → 未登录（redirect 把非 /login 的访问跳 /login）
+class AuthStatusController {
+  AuthStatusController() : _notifier = ValueNotifier<bool?>(null);
+
+  final ValueNotifier<bool?> _notifier;
+
+  ValueNotifier<bool?> get listenable => _notifier;
+
+  bool? get value => _notifier.value;
+
+  void markLoggedIn() {
+    appTalker.info('[AuthStatus] markLoggedIn');
+    _notifier.value = true;
+  }
+
+  void markLoggedOut() {
+    appTalker.info('[AuthStatus] markLoggedOut');
+    _notifier.value = false;
+  }
+
+  void dispose() => _notifier.dispose();
+}
+
+@Riverpod(keepAlive: true)
+AuthStatusController authStatus(Ref ref) {
+  final controller = AuthStatusController();
+  unawaited(_bootstrap(ref, controller));
+  ref.onDispose(controller.dispose);
+  return controller;
+}
+
+Future<void> _bootstrap(Ref ref, AuthStatusController controller) async {
+  try {
+    final token = await ref.read(secureStorageProvider).getToken();
+    final loggedIn = token != null && token.isNotEmpty;
+    if (loggedIn) {
+      controller.markLoggedIn();
+    } else {
+      controller.markLoggedOut();
+    }
+  } on Object catch (e, st) {
+    appTalker.warning('[AuthStatus] bootstrap 异常 → 视为未登录', e, st);
+    controller.markLoggedOut();
+  }
+}