update theme

lib/features/price_policy/presentation/widgets/document_card.dart

@@ -16,11 +16,13 @@ class DocumentCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+
     return Container(
       decoration: BoxDecoration(
-        color: AppColors.white,
+        color: colorScheme.surface,
         borderRadius: BorderRadius.circular(12),
-        border: Border.all(color: AppColors.grey100),
+        border: Border.all(color: colorScheme.surfaceContainerHighest),
         boxShadow: [
           BoxShadow(
             color: Colors.black.withValues(alpha: 0.05),
@@ -47,15 +49,15 @@ class DocumentCard extends StatelessWidget {
                     children: [
                       Row(
                         children: [
-                          _buildIcon(),
+                          _buildIcon(colorScheme),
                           const SizedBox(width: AppSpacing.md),
-                          Expanded(child: _buildInfo()),
+                          Expanded(child: _buildInfo(colorScheme)),
                         ],
                       ),
                       const SizedBox(height: AppSpacing.md),
                       SizedBox(
                         width: double.infinity,
-                        child: _buildDownloadButton(),
+                        child: _buildDownloadButton(colorScheme),
                       ),
                     ],
                   );
@@ -63,11 +65,11 @@ class DocumentCard extends StatelessWidget {
 
                 return Row(
                   children: [
-                    _buildIcon(),
+                    _buildIcon(colorScheme),
                     const SizedBox(width: AppSpacing.md),
-                    Expanded(child: _buildInfo()),
+                    Expanded(child: _buildInfo(colorScheme)),
                     const SizedBox(width: AppSpacing.md),
-                    _buildDownloadButton(),
+                    _buildDownloadButton(colorScheme),
                   ],
                 );
               },
@@ -78,7 +80,7 @@ class DocumentCard extends StatelessWidget {
     );
   }
 
-  Widget _buildIcon() {
+  Widget _buildIcon(ColorScheme colorScheme) {
     final iconData = document.isPdf ? Icons.picture_as_pdf : Icons.table_chart;
     final iconColor = document.isPdf
         ? Colors.red.shade600
@@ -88,46 +90,46 @@ class DocumentCard extends StatelessWidget {
       width: 50,
       height: 50,
       decoration: BoxDecoration(
-        color: AppColors.grey50,
+        color: colorScheme.surfaceContainerLowest,
         borderRadius: BorderRadius.circular(8),
       ),
       child: Icon(iconData, size: 28, color: iconColor),
     );
   }
 
-  Widget _buildInfo() {
+  Widget _buildInfo(ColorScheme colorScheme) {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         Text(
           document.title,
-          style: const TextStyle(
+          style: TextStyle(
             fontSize: 16,
             fontWeight: FontWeight.w600,
-            color: AppColors.grey900,
+            color: colorScheme.onSurface,
           ),
         ),
         const SizedBox(height: 4),
         Row(
           children: [
-            const Icon(
+            Icon(
               Icons.calendar_today,
               size: 13,
-              color: AppColors.grey500,
+              color: colorScheme.onSurfaceVariant,
             ),
             const SizedBox(width: 4),
             Text(
               document.formattedDateWithPrefix,
-              style: const TextStyle(fontSize: 13, color: AppColors.grey500),
+              style: TextStyle(fontSize: 13, color: colorScheme.onSurfaceVariant),
             ),
           ],
         ),
         const SizedBox(height: 6),
         Text(
           document.title,
-          style: const TextStyle(
+          style: TextStyle(
             fontSize: 14,
-            color: AppColors.grey500,
+            color: colorScheme.onSurfaceVariant,
             height: 1.4,
           ),
           maxLines: 2,
@@ -137,9 +139,9 @@ class DocumentCard extends StatelessWidget {
     );
   }
 
-  Widget _buildDownloadButton() {
+  Widget _buildDownloadButton(ColorScheme colorScheme) {
     final isDownloaded = document.filePath != null;
-    final buttonColor = isDownloaded ? AppColors.success : AppColors.primaryBlue;
+    final buttonColor = isDownloaded ? AppColors.success : colorScheme.primary;
     final buttonIcon = isDownloaded ? Icons.folder_open : Icons.download;
     final buttonText = isDownloaded ? 'Mở file' : 'Tải về';