fix(accounts): 账号管理改为单行增量更新并避免全量刷新

- 将编辑与重新授权成功事件改为回传更新后的账号对象
- 在账号列表页按 id 就地补丁更新单行数据并保留运行时容量字段
- 单账号操作（刷新凭证/清错/清限流/临时不可调度重置）改为单行更新
- 后端增强 clear-rate-limit 接口，返回更新后的账号对象
- 同步前端 clearRateLimit API 类型定义

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/api/admin/accounts.ts

@@ -164,10 +164,10 @@ export async function getUsage(id: number): Promise<AccountUsageInfo> {
 /**
  * Clear account rate limit status
  * @param id - Account ID
- * @returns Success confirmation
+ * @returns Updated account
  */
-export async function clearRateLimit(id: number): Promise<{ message: string }> {
-  const { data } = await apiClient.post<{ message: string }>(
+export async function clearRateLimit(id: number): Promise<Account> {
+  const { data } = await apiClient.post<Account>(
     `/admin/accounts/${id}/clear-rate-limit`
   )
   return data