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.

shell/preload/sitecustomize.js

@@ -82,7 +82,7 @@ function run() {
     ].filter(Boolean);
 
     if (task_before) {
-      console.log('执行前置命令\n');
+      console.log(process.env.QL_LANG === 'en' ? 'Executing before command\n' : '执行前置命令\n');
     }
 
     const res = execSync(commands.join(' && '), {
@@ -122,7 +122,7 @@ function run() {
       console.log(output);
     }
     if (task_before) {
-      console.log('执行前置命令结束\n');
+      console.log(process.env.QL_LANG === 'en' ? 'Before command finished\n' : '执行前置命令结束\n');
     }
   } catch (error) {
     if (!error.message.includes('spawnSync /bin/bash E2BIG')) {
@@ -131,7 +131,7 @@ function run() {
       // environment variable is too large
     }
     if (task_before) {
-      console.log('执行前置命令结束\n');
+      console.log(process.env.QL_LANG === 'en' ? 'Before command finished\n' : '执行前置命令结束\n');
     }
   }