i18n 国际化全量接入 + 修复与 UI 增强

- 引入 i18n 系统，所有用户可见字符串替换为 t() 调用，支持中/EN/日三语
- 插件激活时读取 ai.outputLanguage 配置初始化语言，onDidChangeConfiguration 监听变更自动切换
- ReviewPanel 与 SetupViewProvider 注册 onLanguageChange 回调，语言切换时全量重渲染
- package.json description："AI 输出语言" -> "插件语言"
- 修复 repairJsonEscapes 无差别解引号导致 JSON 解析失败
- 设置页规则名称空值时输入框红框 + 错误提示
- 规则导入流程添加 withProgress 加载提示

src/adapters/pmd.ts

@@ -4,6 +4,7 @@ import { existsSync } from 'fs';
 import { execSync, spawn } from 'child_process';
 import type { LinterAdapter, LinterDiagnostic, AdapterResult } from '../types';
 import { getPMDRulesetPath } from '../config';
+import { t } from '../i18n/messages';
 
 export class PmdAdapter implements LinterAdapter {
   id = 'pmd';
@@ -57,7 +58,7 @@ export class PmdAdapter implements LinterAdapter {
     } catch (err) {
       const message = err instanceof Error ? err.message : String(err);
       if (message.includes('ENOENT') || message.includes('java not found') || message.includes('Cannot find')) {
-        return { diagnostics: [], status: 'tool-unavailable', errorMessage: 'Java 11+ 未安装或不在 PATH 中' };
+        return { diagnostics: [], status: 'tool-unavailable', errorMessage: t('adapter.javaNotInstalled') };
       }
       return { diagnostics: [], status: 'execution-failed', errorMessage: message };
     }