fix(fe): 修复中优先级表格功能问题

修复的问题：

1. **搜索和筛选防抖不同步**（AccountsView.vue）
   - 问题：筛选器使用 reload（立即），搜索使用 debouncedReload（300ms延迟）
   - 修复：统一使用 debouncedReload，避免多余的API调用

2. **useTableLoader 竞态条件**（useTableLoader.ts）
   - 问题：finally 块检查 signal.aborted 而不是 controller 实例
   - 修复：检查 abortController === currentController

3. **改进错误处理**（UsersView.vue）
   - 添加详细错误消息：error.response?.data?.detail || error.message
   - 用户可以看到具体的错误原因而不是通用消息

4. **分页边界检查**（useTableLoader.ts, UsersView.vue）
   - 添加页码有效性检查：Math.max(1, Math.min(page, pagination.pages || 1))
   - 防止分页越界导致显示空表

影响范围：
- frontend/src/composables/useTableLoader.ts
- frontend/src/views/admin/AccountsView.vue
- frontend/src/views/admin/UsersView.vue

测试：✓ 前端构建测试通过

frontend/src/composables/useTableLoader.ts

@@ -43,7 +43,8 @@ export function useTableLoader<T, P extends Record<string, any>>(options: TableL
     if (abortController) {
       abortController.abort()
     }
-    abortController = new AbortController()
+    const currentController = new AbortController()
+    abortController = currentController
     loading.value = true
 
     try {
@@ -51,9 +52,9 @@ export function useTableLoader<T, P extends Record<string, any>>(options: TableL
         pagination.page,
         pagination.page_size,
         toRaw(params) as P,
-        { signal: abortController.signal }
+        { signal: currentController.signal }
       )
-      
+
       items.value = response.items || []
       pagination.total = response.total || 0
       pagination.pages = response.pages || 0
@@ -63,7 +64,7 @@ export function useTableLoader<T, P extends Record<string, any>>(options: TableL
         throw error
       }
     } finally {
-      if (abortController && !abortController.signal.aborted) {
+      if (abortController === currentController) {
         loading.value = false
       }
     }
@@ -77,7 +78,9 @@ export function useTableLoader<T, P extends Record<string, any>>(options: TableL
   const debouncedReload = useDebounceFn(reload, debounceMs)
 
   const handlePageChange = (page: number) => {
-    pagination.page = page
+    // 确保页码在有效范围内
+    const validPage = Math.max(1, Math.min(page, pagination.pages || 1))
+    pagination.page = validPage
     load()
   }
 

frontend/src/views/admin/AccountsView.vue

@@ -7,7 +7,7 @@
             v-model:searchQuery="params.search"
             :filters="params"
             @update:filters="(newFilters) => Object.assign(params, newFilters)"
-            @change="reload"
+            @change="debouncedReload"
             @update:searchQuery="debouncedReload"
           />
           <AccountTableActions

frontend/src/views/admin/UsersView.vue

@@ -893,12 +893,13 @@ const loadUsers = async () => {
         }
       }
     }
-  } catch (error) {
+  } catch (error: any) {
     const errorInfo = error as { name?: string; code?: string }
     if (errorInfo?.name === 'AbortError' || errorInfo?.name === 'CanceledError' || errorInfo?.code === 'ERR_CANCELED') {
       return
     }
-    appStore.showError(t('admin.users.failedToLoad'))
+    const message = error.response?.data?.detail || error.message || t('admin.users.failedToLoad')
+    appStore.showError(message)
     console.error('Error loading users:', error)
   } finally {
     if (abortController === currentAbortController) {
@@ -917,7 +918,9 @@ const handleSearch = () => {
 }
 
 const handlePageChange = (page: number) => {
-  pagination.page = page
+  // 确保页码在有效范围内
+  const validPage = Math.max(1, Math.min(page, pagination.pages || 1))
+  pagination.page = validPage
   loadUsers()
 }