refactor(i18n): 移除 chrome.i18n 国际化，统一使用中文硬编码

移除 chromeI18n 工具、_locales 翻译文件和 manifest default_locale 配置，
将所有 UI 文案改为直接硬编码中文，并更新相关测试与文档。

src/utils/chromeI18n.ts

@@ -1,68 +0,0 @@
-/**
- * chrome.i18n 类型安全 wrapper
- * 提供与 react-i18next 兼容的接口
- */
-
-/**
- * 获取翻译文本
- * @param msgId 翻译 key（如 'timestamp_pageTitle'）
- * @param substitutions 占位符替换值（可选）
- * @returns 翻译后的文本
- */
-export function getMessage(msgId: string, substitutions?: string[]): string {
-  try {
-    return chrome.i18n.getMessage(msgId, substitutions);
-  } catch (error) {
-    console.warn(`[chrome.i18n] 无法获取翻译: ${msgId}`, error);
-    return msgId; // 回退到 key 本身
-  }
-}
-
-/**
- * react-i18next 兼容的 Hook
- * 返回 t 函数和相关信息
- */
-export function useI18n(namespace?: string | string[]) {
-  const namespaces = Array.isArray(namespace) ? namespace : namespace ? [namespace] : [];
-
-  const t = (key: string, options?: Record<string, unknown>): string => {
-    // 统一将分隔符转换为下划线，兼容 'namespace:key.path' 和 'key.path' 两种写法
-    const msgId = key.replace(':', '_').replace(/\./g, '_');
-
-    // 先尝试直接查找 key
-    let message = getMessage(msgId);
-
-    // 如果直接查找未命中（空字符串或返回 key 本身），尝试命名空间前缀（使用转换后的 msgId）
-    if ((!message || message === msgId) && namespaces.length > 0) {
-      for (const ns of namespaces) {
-        const candidate = `${ns}_${msgId}`;
-        const result = getMessage(candidate);
-        if (result !== candidate) {
-          message = result;
-          break;
-        }
-      }
-    }
-
-    if (options) {
-      for (const [placeholder, value] of Object.entries(options)) {
-        message = message.replace(`{{${placeholder}}}`, String(value));
-      }
-    }
-
-    return message;
-  };
-
-  return {
-    t,
-    i18n: {
-      language: 'zh',
-      changeLanguage: (_lng?: string) => {
-        // chrome.i18n 无法动态切换语言，需要刷新页面
-        console.warn('[chrome.i18n] 无法动态切换语言，需要刷新页面');
-        return Promise.resolve();
-      },
-    },
-    isLoaded: true,
-  };
-}

src/utils/jwt.ts

@@ -2,8 +2,6 @@
  * JWT 解析工具
  */
 
-import { getMessage } from '@/utils/chromeI18n';
-
 interface JwtHeader {
   alg: string;
   typ?: string;
@@ -43,7 +41,7 @@ export function decodeBase64Url(str: string): string {
   const pad = base64.length % 4;
   if (pad) {
     if (pad === 1) {
-      throw new Error(getMessage('jwt_errors_invalidBase64String'));
+      throw new Error('无效的 Base64URL 字符串');
     }
     base64 += new Array(5 - pad).join('=');
   }
@@ -58,10 +56,9 @@ export function decodeBase64Url(str: string): string {
     const decoder = new TextDecoder('utf-8');
     return decoder.decode(bytes);
   } catch (e) {
-    throw new Error(
-      getMessage('jwt_errors_failedToDecode') + (e instanceof Error ? e.message : String(e)),
-      { cause: e },
-    );
+    throw new Error('Base64 解码失败: ' + (e instanceof Error ? e.message : String(e)), {
+      cause: e,
+    });
   }
 }
 
@@ -78,7 +75,7 @@ export function parseJwt(token: string): JwtResult {
       payload: null,
       signature: '',
       raw: { header: '', payload: '', signature: '' },
-      error: getMessage('jwt_errors_invalidFormat'),
+      error: 'JWT 格式无效：应包含 3 个部分（header.payload.signature）',
     };
   }
 
@@ -98,8 +95,7 @@ export function parseJwt(token: string): JwtResult {
     const headerJson = decodeBase64Url(headerB64);
     result.header = JSON.parse(headerJson);
   } catch (e) {
-    result.error =
-      getMessage('jwt_errors_parseHeaderFailed') + (e instanceof Error ? e.message : String(e));
+    result.error = 'JWT Header 解析失败: ' + (e instanceof Error ? e.message : String(e));
     return result;
   }
 
@@ -107,8 +103,7 @@ export function parseJwt(token: string): JwtResult {
     const payloadJson = decodeBase64Url(payloadB64);
     result.payload = JSON.parse(payloadJson);
   } catch (e) {
-    result.error =
-      getMessage('jwt_errors_parsePayloadFailed') + (e instanceof Error ? e.message : String(e));
+    result.error = 'JWT Payload 解析失败: ' + (e instanceof Error ? e.message : String(e));
     return result;
   }
 

src/utils/ruleStorage.ts

@@ -9,7 +9,7 @@ import type { DataRule, FieldConfig } from '@/types/testDataGenerator';
 const STORAGE_KEY = 'testDataGenerator_rules';
 
 /** 最大规则数量 */
-const MAX_RULES = 20;
+export const MAX_RULES = 20;
 
 /**
  * 获取所有规则

src/utils/storageCleaner.ts

@@ -20,6 +20,15 @@ const CLEAN_OPTION_KEYS: (keyof StorageCleanerOptions)[] = [
   'serviceWorkers',
 ];
 
+const OPTION_LABELS: Record<string, string> = {
+  localStorage: 'Local Storage',
+  sessionStorage: 'Session Storage',
+  indexedDB: '站点存储',
+  cookies: 'Cookies',
+  cacheStorage: 'Cache Storage',
+  serviceWorkers: 'Service Workers',
+};
+
 export async function getCurrentTab() {
   // For popup pages, we need to get the active tab from the browser window that triggered the popup.
   // We should ONLY care about the currently active tab in the last focused window.
@@ -362,22 +371,19 @@ export async function clearStorage(
   return result;
 }
 
-export function formatCleaningResult(
-  result: CleaningResult,
-  t: (key: string, options?: Record<string, unknown>) => string,
-): string {
+export function formatCleaningResult(result: CleaningResult): string {
   const parts: string[] = [];
 
   for (const key of CLEAN_OPTION_KEYS) {
     const r = result[key];
     if (r?.success && r.count > 0) {
-      parts.push(`${r.count} ${t(`storageCleaner:options.${key}`)}`);
+      parts.push(`${r.count} ${OPTION_LABELS[key] || key}`);
     }
   }
 
   if (parts.length === 0) {
-    return t('storageCleaner:noDataToClean');
+    return '该页面没有可清理的存储数据';
   }
 
-  return t('storageCleaner:cleanedSummary', { items: parts.join(', ') });
+  return `清理了 ${parts.join(', ')}`;
 }