fix(App.vue): 修改论坛反馈按钮的点击事件为箭头函数，确保在新窗口中打开链接的行为一致性

- 在App.vue中新增论坛反馈按钮，链接至相关讨论页面
- 在Prices.vue中更新价格卡片的显示逻辑，使用更新者信息替代创建者信息，提升信息准确性

backend/handlers/prices.go

@@ -482,7 +482,6 @@ func UpdatePriceStatus(c *gin.Context) {
 		updateMap["temp_input_image_tokens"] = nil
 		updateMap["temp_output_image_tokens"] = nil
 		updateMap["temp_price_source"] = nil
-		updateMap["updated_by"] = nil
 
 		if err := tx.Model(&price).Updates(updateMap).Error; err != nil {
 			tx.Rollback()
@@ -744,7 +743,6 @@ func ApproveAllPrices(c *gin.Context) {
 			updateMap["temp_input_image_tokens"] = nil
 			updateMap["temp_output_image_tokens"] = nil
 			updateMap["temp_price_source"] = nil
-			updateMap["updated_by"] = nil
 
 			if err := tx.Model(&price).Updates(updateMap).Error; err != nil {
 				tx.Rollback()

frontend/src/App.vue

@@ -10,6 +10,7 @@
             <el-button @click="$router.push('/prices')" :type="$route.path === '/prices' ? 'primary' : ''">价格列表</el-button>
             <el-button @click="$router.push('/providers')" :type="$route.path === '/providers' ? 'primary' : ''">模型厂商</el-button>
             <el-button @click="$router.push('/model-types')" :type="$route.path === '/model-types' ? 'primary' : ''">模型类别</el-button>
+            <el-button @click="() => window.open('https://www.sunai.net/t/topic/937', '_blank')">论坛反馈</el-button>
           </div>
         </div>
         <div class="auth-buttons">

frontend/src/views/Prices.vue

@@ -222,7 +222,7 @@
 
             <div class="price-card-footer">
               <div class="meta-info">
-                <span class="created-by"><el-icon><User /></el-icon> {{ price.created_by }}</span>
+                <span class="updated-by"><el-icon><User /></el-icon> {{ price.updated_by || price.created_by }}</span>
                 <span class="updated-at"><el-icon><Timer /></el-icon> {{ new Date(price.updated_at).toLocaleString() }}</span>
                 <div v-if="price.price_source" class="price-source">
                   <span class="source-label"><el-icon><InfoFilled /></el-icon></span>
@@ -2075,7 +2075,7 @@ onMounted(() => {
   font-size: 0.8rem; /* 减小图标 */
 }
 
-.created-by {
+.updated-by {
   font-weight: normal; /* 使用正常字重 */
   display: flex;
   align-items: center;