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/services/metrics.ts

@@ -1,3 +1,4 @@
+import { t } from '../shared/i18n';
 import { performance } from 'perf_hooks';
 import Logger from '../loaders/logger';
 
@@ -126,7 +127,7 @@ export class MetricsService {
       timestamp: Date.now(),
       metrics: this.getMetrics(),
     };
-    Logger.info('性能指标报告:', report);
+    Logger.info(t('性能指标报告:'), report);
     return report;
   }
 }