fix；设置和深浅色

lib/widgets/institution_card.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:shadcn_ui/shadcn_ui.dart';
 
 import '../data/models/models.dart';
 import '../theme/yanting_text.dart';
@@ -18,6 +19,7 @@ class InstitutionCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final colors = ShadTheme.of(context).colorScheme;
     final initials = institution.nameCn.isEmpty
         ? '研'
         : institution.nameCn.characters.take(2).toString();
@@ -43,6 +45,7 @@ class InstitutionCard extends StatelessWidget {
                   overflow: TextOverflow.ellipsis,
                   style: YantingText.listTitle.copyWith(
                     fontWeight: FontWeight.w700,
+                    color: colors.foreground,
                   ),
                 ),
                 if (institution.nameEn.isNotEmpty) ...[
@@ -80,6 +83,7 @@ class InstitutionCard extends StatelessWidget {
                 style: YantingText.sectionTitle.copyWith(
                   fontSize: 20,
                   fontFeatures: YantingTypographyFeatures.tabularNums,
+                  color: colors.foreground,
                 ),
               ),
               Text('份研报', style: YantingText.meta.copyWith(fontSize: 11)),
@@ -105,17 +109,18 @@ class InstitutionLogo extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final colors = ShadTheme.of(context).colorScheme;
     final fallback = DecoratedBox(
       decoration: BoxDecoration(
-        color: YantingColors.secondary,
-        border: Border.all(color: YantingColors.border),
+        color: colors.secondary,
+        border: Border.all(color: colors.border),
         borderRadius: BorderRadius.circular(size * 0.25),
       ),
       child: Center(
         child: Text(
           initials,
           style: YantingText.meta.copyWith(
-            color: YantingColors.secondaryForeground,
+            color: colors.secondaryForeground,
             fontSize: 14,
             fontWeight: FontWeight.w700,
             fontFeatures: null,