refactor(client): widgets 颜色迁移到 context.tokens

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/test/partners_screen_test.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:jiu_client/core/models/page_result.dart';
+import 'package:jiu_client/core/theme/themes.dart';
 import 'package:jiu_client/models/license.dart';
 import 'package:jiu_client/models/partner.dart';
 import 'package:jiu_client/providers/license_provider.dart';
@@ -103,7 +104,7 @@ Widget _buildApp({
         () => _FakePartnerNotifier('customer', customerState),
       ),
     ],
-    child: const MaterialApp(home: Scaffold(body: PartnersScreen())),
+    child: MaterialApp(theme: buildTheme('a'), home: const Scaffold(body: PartnersScreen())),
   );
 }
 
@@ -118,7 +119,7 @@ Widget _buildLoadingApp() {
         () => _FakeLoadingPartnerNotifier('customer'),
       ),
     ],
-    child: const MaterialApp(home: Scaffold(body: PartnersScreen())),
+    child: MaterialApp(theme: buildTheme('a'), home: const Scaffold(body: PartnersScreen())),
   );
 }