refactor(apps): 主题系统迁移至 ColorScheme + 扩展架构并支持 Dark Mode

apps/lib/features/messages/presentation/widgets/message_action_sheet.dart

@@ -27,12 +27,15 @@ class MessageActionSheet extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+    final resolvedIconColor = iconColor ?? colorScheme.primary;
+
     return Container(
       width: double.infinity,
       padding: const EdgeInsets.fromLTRB(24, 20, 24, 0),
-      decoration: const BoxDecoration(
-        color: AppColors.white,
-        borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
+      decoration: BoxDecoration(
+        color: colorScheme.surface,
+        borderRadius: const BorderRadius.vertical(top: Radius.circular(24)),
       ),
       child: Column(
         mainAxisSize: MainAxisSize.min,
@@ -41,7 +44,7 @@ class MessageActionSheet extends StatelessWidget {
             width: 40,
             height: 4,
             decoration: BoxDecoration(
-              color: AppColors.slate300,
+              color: colorScheme.outlineVariant,
               borderRadius: BorderRadius.circular(2),
             ),
           ),
@@ -51,23 +54,19 @@ class MessageActionSheet extends StatelessWidget {
               width: 72,
               height: 72,
               decoration: BoxDecoration(
-                color: (iconColor ?? AppColors.blue500).withValues(alpha: 0.1),
+                color: resolvedIconColor.withValues(alpha: 0.1),
                 shape: BoxShape.circle,
               ),
-              child: Icon(
-                icon,
-                size: 32,
-                color: iconColor ?? AppColors.blue500,
-              ),
+              child: Icon(icon, size: 32, color: resolvedIconColor),
             ),
             const SizedBox(height: 16),
           ],
           Text(
             title,
-            style: const TextStyle(
+            style: TextStyle(
               fontSize: 20,
               fontWeight: FontWeight.w600,
-              color: AppColors.slate900,
+              color: colorScheme.onSurface,
             ),
             textAlign: TextAlign.center,
           ),
@@ -75,7 +74,10 @@ class MessageActionSheet extends StatelessWidget {
             const SizedBox(height: 8),
             Text(
               description!,
-              style: const TextStyle(fontSize: 14, color: AppColors.slate500),
+              style: TextStyle(
+                fontSize: 14,
+                color: colorScheme.onSurfaceVariant,
+              ),
               textAlign: TextAlign.center,
             ),
           ],
@@ -84,12 +86,15 @@ class MessageActionSheet extends StatelessWidget {
             Container(
               padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
               decoration: BoxDecoration(
-                color: AppColors.slate100,
+                color: colorScheme.surfaceContainerHigh,
                 borderRadius: BorderRadius.circular(16),
               ),
               child: Text(
                 statusText!,
-                style: const TextStyle(fontSize: 14, color: AppColors.slate600),
+                style: TextStyle(
+                  fontSize: 14,
+                  color: colorScheme.onSurfaceVariant,
+                ),
               ),
             ),
           ],