fix: synchronize runtime locales and harden online updates

Translate UI, scheduler, validation, preload and maintenance messages dynamically, and propagate locale changes between workers. Harden update checks, downloads and terminal states, verify Debian pnpm, and ignore generated test artifacts.

back/api/clientIp.ts

@@ -1,5 +1,6 @@
 import { NextFunction, Request, Response, Router } from 'express';
 import { celebrate, Joi } from 'celebrate';
+import { t } from '../shared/i18n';
 import {
   diagnoseClientIp,
   getTrustProxyConfig,
@@ -36,7 +37,7 @@ export default (app: Router) => {
       } catch (error) {
         res.send({
           code: 400,
-          message: error instanceof Error ? error.message : '配置更新失败',
+          message: error instanceof Error ? error.message : t('配置更新失败'),
         });
       }
     },