fix(app): account-switch data residue + empty-albums pull-to-refresh

- 换账号数据残留（用户报告）：albumListProvider 非 autoDispose 且首页
  IndexedStack 常驻——登出与登录成功两处显式 invalidate（任务库本就按账号
  隔离键隔离，不受影响）
- 空相册无法下拉刷新（用户报告）：空态原本直接 return EmptyState 无
  RefreshIndicator——被拉进相册后无法手动刷新；空态改入可滚动容器承载
  下拉刷新（保留新建入口）
- 397/397 全绿、analyze 0

Co-Authored-By: Claude Code <noreply@anthropic.com>

apps/mobile/lib/pages/albums_tab.dart

@@ -101,11 +101,23 @@ class AlbumListBody extends ConsumerWidget {
           onRetry: notifier.refresh,
         );
       }
-      return EmptyState(
+      // 空态也保留下拉刷新（被拉进相册后可手动刷新看到，2026-09-23 用户报告）。
+      return RefreshIndicator(
+        onRefresh: notifier.refresh,
+        child: ListView(
+          physics: const AlwaysScrollableScrollPhysics(),
+          children: [
+            SizedBox(
+              height: MediaQuery.of(context).size.height * 0.5,
+              child: EmptyState(
                 icon: Icons.photo_library_outlined,
                 title: l10n.albumsEmpty,
                 actionLabel: l10n.albumCreate,
                 onAction: () => AlbumsTab.openCreate(context, ref),
+              ),
+            ),
+          ],
+        ),
       );
     }
 
@@ -147,7 +159,9 @@ class AlbumListBody extends ConsumerWidget {
                 );
               }
               // 接近底部时预取下一页（loadMore 自带并发/末页守卫）。
-              if (index >= rowCount - 2 && state.hasMore && !state.loadingMore) {
+              if (index >= rowCount - 2 &&
+                  state.hasMore &&
+                  !state.loadingMore) {
                 WidgetsBinding.instance.addPostFrameCallback(
                   (_) => notifier.loadMore(),
                 );

apps/mobile/lib/pages/home_page.dart

@@ -3,6 +3,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../app/locale_controller.dart';
 import '../core/api_client.dart';
+import '../features/albums/providers.dart';
 import '../features/uploads/engine_scope.dart';
 import '../features/uploads/queue_controller.dart';
 import '../l10n/app_localizations.dart';
@@ -136,9 +137,7 @@ class SettingsTab extends ConsumerWidget {
         child: SingleChildScrollView(
           // 长文案/大字体下允许滚动，面板不做固定高度。
           child: Padding(
-            padding: const EdgeInsets.fromLTRB(
+            padding: const EdgeInsets.fromLTRB(kSpace24, 0, kSpace24, kSpace24),
-              kSpace24, 0, kSpace24, kSpace24,
-            ),
             child: Column(
               mainAxisSize: MainAxisSize.min,
               crossAxisAlignment: CrossAxisAlignment.stretch,
@@ -206,6 +205,10 @@ class SettingsTab extends ConsumerWidget {
     await ref.read(apiClientProvider).logout();
     // 会话账号失效 → 引擎 stop（任务保留库内，见 engine_scope.dart）。
     await ref.read(sessionAccountProvider.notifier).refresh();
+    // 账号级缓存失效（2026-09-23 用户报告：换账号后相册列表仍是上一账号数据
+    // ——首页 IndexedStack 三 tab 常驻不销毁，非 autoDispose 的列表 Provider
+    // 必须显式失效；任务库已按账号隔离键隔离，无需清）。
+    ref.invalidate(albumListProvider);
     if (!context.mounted) return;
     Navigator.of(context).pushNamedAndRemoveUntil('/login', (route) => false);
   }
@@ -226,7 +229,10 @@ class SettingsTab extends ConsumerWidget {
           // ── 账号摘要卡（只读展示，非编辑入口） ─────────────────
           Padding(
             padding: const EdgeInsets.fromLTRB(
-              kSpace16, kSpace8, kSpace16, kSpace8,
+              kSpace16,
+              kSpace8,
+              kSpace16,
+              kSpace8,
             ),
             child: SectionHeader(title: l10n.settingsSectionAccount),
           ),
@@ -263,7 +269,10 @@ class SettingsTab extends ConsumerWidget {
           // ── 通用：语言 / 改密 / 上传帮助 / 版本 ──────────────────
           Padding(
             padding: const EdgeInsets.fromLTRB(
-              kSpace16, kSpace24, kSpace16, kSpace8,
+              kSpace16,
+              kSpace24,
+              kSpace16,
+              kSpace8,
             ),
             child: SectionHeader(title: l10n.settingsSectionGeneral),
           ),
@@ -323,8 +332,7 @@ class SettingsTab extends ConsumerWidget {
                   foregroundColor: theme.colorScheme.error,
                   minimumSize: const Size(48, 48),
                 ),
-                onPressed: () =>
+                onPressed: () => _confirmLogout(context, ref, unfinishedTasks),
-                    _confirmLogout(context, ref, unfinishedTasks),
                 child: Text(l10n.logout),
               ),
             ),
@@ -351,10 +359,7 @@ class _AccountAvatar extends StatelessWidget {
       radius: 24,
       backgroundColor: scheme.primary,
       foregroundColor: scheme.onPrimary,
-      child: Text(
+      child: Text(initial, style: Theme.of(context).textTheme.titleMedium),
-        initial,
-        style: Theme.of(context).textTheme.titleMedium,
-      ),
     );
   }
 }

apps/mobile/lib/pages/login_page.dart

@@ -13,6 +13,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../core/api_client.dart';
+import '../features/albums/providers.dart';
 import '../core/app_exception.dart';
 import '../core/error_l10n.dart';
 import '../features/uploads/engine_scope.dart';
@@ -56,12 +57,14 @@ class _LoginPageState extends ConsumerState<LoginPage> {
     final l10n = AppLocalizations.of(context);
     final navigator = Navigator.of(context);
     try {
-      await ref.read(apiClientProvider).login(
+      await ref
-            _accountController.text.trim(),
+          .read(apiClientProvider)
-            _passwordController.text,
+          .login(_accountController.text.trim(), _passwordController.text);
-          );
       // 登录成功：刷新会话账号 → 引擎以新账号 scope start（Task 9 接线）。
       await ref.read(sessionAccountProvider.notifier).refresh();
+      // 账号级缓存失效（换账号登录/会话过期重登同一保障：列表等 Provider
+      // 非 autoDispose，首页 IndexedStack 常驻——不失效会短暂显示上一账号数据）。
+      ref.invalidate(albumListProvider);
       navigator.pushReplacementNamed('/home');
     } on AppException catch (error) {
       // 429（AUTH_RATE_LIMITED）等文案经错误码映射；登录页的
@@ -84,17 +87,16 @@ class _LoginPageState extends ConsumerState<LoginPage> {
         top: false,
         child: LayoutBuilder(
           builder: (context, constraints) {
-            final keyboardOpen =
+            final keyboardOpen = MediaQuery.of(context).viewInsets.bottom > 0;
-                MediaQuery.of(context).viewInsets.bottom > 0;
             // 正常高度 28%（25%-32% 区间）；键盘/短屏压缩至 10%。
-            final headerHeight = (constraints.maxHeight *
+            final headerHeight =
-                    (keyboardOpen ? 0.10 : 0.28))
+                (constraints.maxHeight * (keyboardOpen ? 0.10 : 0.28)).clamp(
-                .clamp(96.0, 320.0);
+                  96.0,
+                  320.0,
+                );
             return SingleChildScrollView(
               child: ConstrainedBox(
-                constraints: BoxConstraints(
+                constraints: BoxConstraints(minHeight: constraints.maxHeight),
-                  minHeight: constraints.maxHeight,
-                ),
                 child: Column(
                   crossAxisAlignment: CrossAxisAlignment.stretch,
                   mainAxisSize: MainAxisSize.min,
@@ -102,18 +104,18 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                     _CollageHeader(height: headerHeight),
                     Padding(
                       padding: const EdgeInsets.fromLTRB(
-                        kSpace24, kSpace24, kSpace24, kSpace24,
+                        kSpace24,
+                        kSpace24,
+                        kSpace24,
+                        kSpace24,
                       ),
                       child: ConstrainedBox(
-                        constraints:
+                        constraints: const BoxConstraints(maxWidth: 460),
-                            const BoxConstraints(maxWidth: 460),
                         child: Form(
                           key: _formKey,
-                          autovalidateMode:
+                          autovalidateMode: AutovalidateMode.onUserInteraction,
-                              AutovalidateMode.onUserInteraction,
                           child: Column(
-                            crossAxisAlignment:
+                            crossAxisAlignment: CrossAxisAlignment.stretch,
-                                CrossAxisAlignment.stretch,
                             children: [
                               _BrandRow(),
                               const SizedBox(height: kSpace16),
@@ -136,15 +138,13 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                               const SizedBox(height: kSpace24),
                               TextFormField(
                                 controller: _accountController,
-                                autofillHints: const [
+                                autofillHints: const [AutofillHints.username],
-                                  AutofillHints.username,
-                                ],
                                 textInputAction: TextInputAction.next,
                                 decoration: InputDecoration(
                                   labelText: l10n.username,
                                 ),
-                                validator: (value) => (value == null ||
+                                validator: (value) =>
-                                        value.trim().isEmpty)
+                                    (value == null || value.trim().isEmpty)
                                     ? l10n.fieldRequired
                                     : null,
                               ),
@@ -154,9 +154,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                                 obscureText: _obscurePassword,
                                 enableSuggestions: false,
                                 autocorrect: false,
-                                autofillHints: const [
+                                autofillHints: const [AutofillHints.password],
-                                  AutofillHints.password,
-                                ],
                                 textInputAction: TextInputAction.done,
                                 onFieldSubmitted: (_) =>
                                     _submitting ? null : _submit(),
@@ -174,15 +172,14 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                                       icon: Icon(
                                         _obscurePassword
                                             ? Icons.visibility_outlined
-                                            : Icons
+                                            : Icons.visibility_off_outlined,
-                                                .visibility_off_outlined,
                                         size: 24,
                                       ),
                                     ),
                                   ),
                                 ),
-                                validator: (value) => (value == null ||
+                                validator: (value) =>
-                                        value.isEmpty)
+                                    (value == null || value.isEmpty)
                                     ? l10n.fieldRequired
                                     : null,
                               ),
@@ -211,8 +208,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                                 l10n.loginAskAdmin,
                                 textAlign: TextAlign.center,
                                 style: theme.textTheme.bodySmall?.copyWith(
-                                  color:
+                                  color: theme.colorScheme.onSurfaceVariant,
-                                      theme.colorScheme.onSurfaceVariant,
                                 ),
                               ),
                             ],
@@ -267,20 +263,32 @@ class _CollageHeader extends StatelessWidget {
           Positioned(
             left: 28,
             top: 24,
-            child: _tile(120, 84, Colors.white.withValues(alpha: 0.16),
+            child: _tile(
-                rotate: -0.08),
+              120,
+              84,
+              Colors.white.withValues(alpha: 0.16),
+              rotate: -0.08,
+            ),
           ),
           Positioned(
             right: 44,
             top: 40,
-            child: _tile(132, 92, Colors.white.withValues(alpha: 0.12),
+            child: _tile(
-                rotate: 0.06),
+              132,
+              92,
+              Colors.white.withValues(alpha: 0.12),
+              rotate: 0.06,
+            ),
           ),
           Positioned(
             left: 96,
             bottom: 18,
-            child: _tile(150, 72, Colors.white.withValues(alpha: 0.10),
+            child: _tile(
-                rotate: -0.04),
+              150,
+              72,
+              Colors.white.withValues(alpha: 0.10),
+              rotate: -0.04,
+            ),
           ),
           // 右上语言选择（浮于拼贴之上）。
           Positioned(
@@ -293,8 +301,7 @@ class _CollageHeader extends StatelessWidget {
     );
   }
 
-  Widget _tile(double width, double height, Color color,
+  Widget _tile(double width, double height, Color color, {double rotate = 0}) {
-      {double rotate = 0}) {
     return Transform.rotate(
       angle: rotate,
       child: Container(
@@ -349,8 +356,7 @@ class _LanguagePill extends StatelessWidget {
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final l10n = AppLocalizations.of(context);
-    final isZh =
+    final isZh = Localizations.maybeLocaleOf(context)?.languageCode == 'zh';
-        Localizations.maybeLocaleOf(context)?.languageCode == 'zh';
     return Semantics(
       label: l10n.language,
       button: true,