fix(app): 修复课程管理待确认按钮文字颜色隐形问题

Co-authored-by: Cursor <cursoragent@cursor.com>

packages/app/src/pages/admin/bookings.vue

@@ -111,7 +111,7 @@
                 <text class="action-btn-text action-btn-text--ghost">婉拒</text>
               </view>
               <view class="action-btn action-btn--primary" @tap.stop="handleConfirm(booking)">
-                <text class="action-btn-text">确认预约</text>
+                <text class="action-btn-text action-btn-text--light">确认预约</text>
               </view>
             </view>
 
@@ -982,11 +982,19 @@ $cream: #efe4cf;          // base cream tint
   &--primary {
     background: $sage;
     border-color: $sage;
+
+    .action-btn-text {
+      color: #fff;
+    }
   }
 
   &--confirm {
     background: $ink;
     border-color: $ink;
+
+    .action-btn-text {
+      color: #fff;
+    }
   }
 
   &--ghost {