fix(flutter): 统一下拉刷新主色文案

lib/core/widgets/app_pull_to_refresh.dart

@@ -173,15 +173,14 @@ class _AppPullToRefreshState extends State<AppPullToRefresh> {
         child: Icon(
           Icons.arrow_downward_rounded,
           size: 18,
-          color: armed ? AppColors.blue : AppColors.muted,
+          color: AppColors.blue,
         ),
       ),
       armed ? l10n.releaseToRefresh : l10n.pullToRefresh,
-      emphasized: armed,
     );
   }
 
-  Widget _label(Widget icon, String text, {bool emphasized = false}) {
+  Widget _label(Widget icon, String text) {
     return Row(
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
@@ -189,10 +188,10 @@ class _AppPullToRefreshState extends State<AppPullToRefresh> {
         const SizedBox(width: 6),
         Text(
           text,
-          style: TextStyle(
-            color: emphasized ? AppColors.blue : AppColors.muted,
-            fontSize: 12,
-            fontWeight: emphasized ? FontWeight.w700 : FontWeight.w500,
+          style: const TextStyle(
+            color: AppColors.blue,
+            fontSize: 13,
+            fontWeight: FontWeight.w600,
           ),
         ),
       ],