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

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

client/lib/widgets/mobile_list_card.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import '../core/theme/app_theme.dart';
+import '../core/theme/context_tokens.dart';
 
 /// 移动端列表卡片的单个字段（label: value）。
 class MobileCardField {
@@ -56,19 +56,19 @@ class MobileListCard extends StatelessWidget {
                       crossAxisAlignment: CrossAxisAlignment.start,
                       children: [
                         DefaultTextStyle(
-                          style: const TextStyle(
+                          style: TextStyle(
                             fontSize: 15,
                             fontWeight: FontWeight.w600,
-                            color: AppTheme.textPrimary,
+                            color: context.tokens.text,
                           ),
                           child: title,
                         ),
                         if (subtitle != null) ...[
                           const SizedBox(height: 2),
                           DefaultTextStyle(
-                            style: const TextStyle(
+                            style: TextStyle(
                                 fontSize: 12,
-                                color: AppTheme.textSecondary),
+                                color: context.tokens.muted),
                             child: subtitle!,
                           ),
                         ],
@@ -83,7 +83,7 @@ class MobileListCard extends StatelessWidget {
               ),
               if (fields.isNotEmpty) ...[
                 const SizedBox(height: 10),
-                ...fields.map(_buildField),
+                ...fields.map((f) => _buildField(context, f)),
               ],
               if (actions != null && actions!.isNotEmpty) ...[
                 const Divider(height: 18),
@@ -102,7 +102,7 @@ class MobileListCard extends StatelessWidget {
     );
   }
 
-  Widget _buildField(MobileCardField f) {
+  Widget _buildField(BuildContext context, MobileCardField f) {
     return Padding(
       padding: const EdgeInsets.symmetric(vertical: 3),
       child: Row(
@@ -112,16 +112,16 @@ class MobileListCard extends StatelessWidget {
             width: 64,
             child: Text(
               f.label,
-              style: const TextStyle(
-                  fontSize: 13, color: AppTheme.textSecondary),
+              style: TextStyle(
+                  fontSize: 13, color: context.tokens.muted),
             ),
           ),
           Expanded(
             child: f.valueWidget ??
                 Text(
                   f.value ?? '—',
-                  style: const TextStyle(
-                      fontSize: 13, color: AppTheme.textPrimary),
+                  style: TextStyle(
+                      fontSize: 13, color: context.tokens.text),
                 ),
           ),
         ],