feat(mobile): UI-01 theme system, shared components and navigation

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

apps/mobile/test/helpers/fakes.dart

@@ -145,17 +145,14 @@ class FakeAdapter implements HttpClientAdapter {
 Map<String, dynamic> loginOkBody({
   String token = 'tok-new',
   String expiresAt = '2026-09-20T12:00:00Z',
-}) => <String, dynamic>{
-        'sessionToken': token,
-        'expiresAt': expiresAt,
-      };
+}) => <String, dynamic>{'sessionToken': token, 'expiresAt': expiresAt};
 
 /// 常用响应体：契约 Error 形状。
 Map<String, dynamic> errorBody(String code) => <String, dynamic>{
-        'code': code,
-        'message': 'stub message',
-        'requestId': 'req-stub',
-      };
+  'code': code,
+  'message': 'stub message',
+  'requestId': 'req-stub',
+};
 
 // ── 相册域 fixtures（P3 计划 Task 4；形状对齐 openapi.yaml schemas）──
 
@@ -175,44 +172,45 @@ Map<String, dynamic> albumJson({
   bool originalDownloadEnabled = false,
   List<Map<String, dynamic>>? translations,
   List<Map<String, dynamic>> categories = const <Map<String, dynamic>>[],
-}) =>
-    <String, dynamic>{
-      'id': id,
-      'publicToken': publicToken,
-      'ownerId': ownerId,
-      'status': status,
-      'defaultLocale': defaultLocale,
-      'timezone': timezone,
-      'startAt': startAt,
-      'endAt': endAt,
-      'uploadEnabled': uploadEnabled,
-      'publicEnabled': publicEnabled,
-      'downloadEnabled': downloadEnabled,
-      'originalDownloadEnabled': originalDownloadEnabled,
-      'watermarkVersion': 0,
-      'translations': translations ??
-          <Map<String, dynamic>>[
-            <String, dynamic>{
-              'locale': 'zh-CN',
-              'title': '开幕晚宴',
-              'description': null,
-              'venue': '大宴会厅',
-              'address': null,
-            },
-            <String, dynamic>{
-              'locale': 'en',
-              'title': 'Opening Gala',
-              'description': null,
-              'venue': null,
-              'address': null,
-            },
-          ],
-      'categories': categories,
-      'createdAt': '2026-09-01T00:00:00Z',
-      'updatedAt': '2026-09-01T00:00:00Z',
-      'statsSyncedAt': null,
-      'cover': null,
-    };
+  Map<String, dynamic>? cover,
+}) => <String, dynamic>{
+  'id': id,
+  'publicToken': publicToken,
+  'ownerId': ownerId,
+  'status': status,
+  'defaultLocale': defaultLocale,
+  'timezone': timezone,
+  'startAt': startAt,
+  'endAt': endAt,
+  'uploadEnabled': uploadEnabled,
+  'publicEnabled': publicEnabled,
+  'downloadEnabled': downloadEnabled,
+  'originalDownloadEnabled': originalDownloadEnabled,
+  'watermarkVersion': 0,
+  'translations':
+      translations ??
+      <Map<String, dynamic>>[
+        <String, dynamic>{
+          'locale': 'zh-CN',
+          'title': '开幕晚宴',
+          'description': null,
+          'venue': '大宴会厅',
+          'address': null,
+        },
+        <String, dynamic>{
+          'locale': 'en',
+          'title': 'Opening Gala',
+          'description': null,
+          'venue': null,
+          'address': null,
+        },
+      ],
+  'categories': categories,
+  'createdAt': '2026-09-01T00:00:00Z',
+  'updatedAt': '2026-09-01T00:00:00Z',
+  'statsSyncedAt': null,
+  'cover': cover,
+};
 
 /// 契约 `Category` 响应体。
 Map<String, dynamic> categoryJson({
@@ -220,17 +218,17 @@ Map<String, dynamic> categoryJson({
   String albumId = 'alb-1',
   int sortOrder = 0,
   List<Map<String, dynamic>>? translations,
-}) =>
-    <String, dynamic>{
-      'id': id,
-      'albumId': albumId,
-      'sortOrder': sortOrder,
-      'translations': translations ??
-          <Map<String, dynamic>>[
-            <String, dynamic>{'locale': 'zh-CN', 'name': '仪式'},
-            <String, dynamic>{'locale': 'en', 'name': 'Ceremony'},
-          ],
-    };
+}) => <String, dynamic>{
+  'id': id,
+  'albumId': albumId,
+  'sortOrder': sortOrder,
+  'translations':
+      translations ??
+      <Map<String, dynamic>>[
+        <String, dynamic>{'locale': 'zh-CN', 'name': '仪式'},
+        <String, dynamic>{'locale': 'en', 'name': 'Ceremony'},
+      ],
+};
 
 /// 契约 `Member` 响应体。
 Map<String, dynamic> memberJson({
@@ -238,26 +236,24 @@ Map<String, dynamic> memberJson({
   String account = 'staff02',
   String displayName = 'Staff Two',
   String role = 'collaborator',
-}) =>
-    <String, dynamic>{
-      'userId': userId,
-      'account': account,
-      'displayName': displayName,
-      'role': role,
-      'status': 'active',
-    };
+}) => <String, dynamic>{
+  'userId': userId,
+  'account': account,
+  'displayName': displayName,
+  'role': role,
+  'status': 'active',
+};
 
 /// 契约 `AdminUserLookupItem` 响应体。
 Map<String, dynamic> lookupUserJson({
   String id = 'u-9',
   String account = 'staff09',
   String displayName = 'Staff Nine',
-}) =>
-    <String, dynamic>{
-      'id': id,
-      'account': account,
-      'displayName': displayName,
-    };
+}) => <String, dynamic>{
+  'id': id,
+  'account': account,
+  'displayName': displayName,
+};
 
 /// 契约 `AdminPhoto` 响应体。
 Map<String, dynamic> adminPhotoJson({
@@ -266,36 +262,34 @@ Map<String, dynamic> adminPhotoJson({
   String visibility = 'published',
   String processingState = 'ready',
   int bytes = 123456,
-}) =>
-    <String, dynamic>{
-      'photoId': photoId,
-      'albumId': albumId,
-      'categoryId': null,
-      'uploaderId': 'u-2',
-      'visibility': visibility,
-      'processingState': processingState,
-      'bytes': bytes,
-      'width': 4000,
-      'height': 3000,
-      'shotAt': null,
-      'uploadedAt': '2026-09-18T07:00:00Z',
-      'publishedAt': '2026-09-18T07:05:00Z',
-      'likeCount': 0,
-      'uploader': <String, dynamic>{
-        'userId': 'u-2',
-        'account': 'staff02',
-        'displayName': 'Staff Two',
-      },
-      'preview': null,
-    };
+}) => <String, dynamic>{
+  'photoId': photoId,
+  'albumId': albumId,
+  'categoryId': null,
+  'uploaderId': 'u-2',
+  'visibility': visibility,
+  'processingState': processingState,
+  'bytes': bytes,
+  'width': 4000,
+  'height': 3000,
+  'shotAt': null,
+  'uploadedAt': '2026-09-18T07:00:00Z',
+  'publishedAt': '2026-09-18T07:05:00Z',
+  'likeCount': 0,
+  'uploader': <String, dynamic>{
+    'userId': 'u-2',
+    'account': 'staff02',
+    'displayName': 'Staff Two',
+  },
+  'preview': null,
+};
 
 /// 契约游标分页响应体（hasMore 与 nextCursor 成对）。
 Map<String, dynamic> cursorPageBody(
   List<Map<String, dynamic>> items, {
   String? nextCursor,
-}) =>
-    <String, dynamic>{
-      'items': items,
-      'nextCursor': nextCursor,
-      'hasMore': nextCursor != null,
-    };
+}) => <String, dynamic>{
+  'items': items,
+  'nextCursor': nextCursor,
+  'hasMore': nextCursor != null,
+};