feat: add translation check scripts

- find-missing-translations.ts: detect translation keys used in code but missing in message files
- find-unused-translations.ts: detect translation keys in message files but not used in code

messages/de-DE.json

@@ -373,7 +373,8 @@
       "success": "Textpaar zum Ordner hinzugefügt",
       "error": "Fehler beim Hinzufügen des Textpaars zum Ordner"
     },
-    "autoSave": "Autom. Speichern"
+    "autoSave": "Autom. Speichern",
+    "customLanguage": "oder Sprache eingeben..."
   },
   "dictionary": {
     "title": "Wörterbuch",

messages/en-US.json

@@ -46,7 +46,7 @@
     "unfavorite": "Unfavorite",
     "pleaseLogin": "Please login first"
   },
-"folder_id": {
+  "folder_id": {
     "unauthorized": "You are not the owner of this folder",
     "back": "Back",
     "textPairs": "Text Pairs",
@@ -287,7 +287,7 @@
     "favorites": "Favorites",
     "settings": "Settings"
   },
-"ocr": {
+  "ocr": {
     "title": "OCR Vocabulary Extractor",
     "description": "Upload vocabulary table screenshots from textbooks to extract word-definition pairs",
     "uploadSection": "Upload Image",
@@ -400,6 +400,7 @@
     "auto": "Auto",
     "generateIPA": "generate ipa",
     "translateInto": "translate into",
+    "customLanguage": "or type language...",
     "chinese": "Chinese",
     "english": "English",
     "french": "French",

messages/fr-FR.json

@@ -402,7 +402,8 @@
       "success": "Paire de texte ajoutée au dossier",
       "error": "Échec de l'ajout de la paire de texte au dossier"
     },
-    "autoSave": "Sauvegarde automatique"
+    "autoSave": "Sauvegarde automatique",
+    "customLanguage": "ou tapez la langue..."
   },
   "dictionary": {
     "title": "Dictionnaire",
@@ -508,15 +509,6 @@
       "view": "Voir"
     }
   },
-  "follow": {
-    "follow": "Suivre",
-    "following": "Abonnements",
-    "followers": "Abonnés",
-    "followersOf": "Abonnés de {username}",
-    "followingOf": "Abonnements de {username}",
-    "noFollowers": "Pas encore d'abonnés",
-    "noFollowing": "Ne suit personne"
-  },
   "follow": {
     "follow": "Suivre",
     "following": "Abonné",

messages/it-IT.json

@@ -402,7 +402,8 @@
       "success": "Coppia di testo aggiunta alla cartella",
       "error": "Impossibile aggiungere coppia di testo alla cartella"
     },
-    "autoSave": "Salvataggio Automatico"
+    "autoSave": "Salvataggio Automatico",
+    "customLanguage": "o digita lingua..."
   },
   "dictionary": {
     "title": "Dizionario",
@@ -508,15 +509,6 @@
       "view": "Visualizza"
     }
   },
-  "follow": {
-    "follow": "Segui",
-    "following": "Seguiti",
-    "followers": "Seguaci",
-    "followersOf": "Seguaci di {username}",
-    "followingOf": "Seguiti di {username}",
-    "noFollowers": "Nessun seguace ancora",
-    "noFollowing": "Non segui ancora nessuno"
-  },
   "follow": {
     "follow": "Segui",
     "following": "Stai seguendo",

messages/ja-JP.json

@@ -411,7 +411,8 @@
       "success": "テキストペアがフォルダーに追加されました",
       "error": "テキストペアをフォルダーに追加できませんでした"
     },
-    "autoSave": "自動保存"
+    "autoSave": "自動保存",
+    "customLanguage": "または言語を入力..."
   },
   "dictionary": {
     "title": "辞書",

messages/ko-KR.json

@@ -402,7 +402,8 @@
       "success": "텍스트 쌍이 폴더에 추가됨",
       "error": "폴더에 텍스트 쌍 추가 실패"
     },
-    "autoSave": "자동 저장"
+    "autoSave": "자동 저장",
+    "customLanguage": "또는 언어 입력..."
   },
   "dictionary": {
     "title": "사전",
@@ -508,15 +509,6 @@
       "view": "보기"
     }
   },
-  "follow": {
-    "follow": "팔로우",
-    "following": "팔로잉",
-    "followers": "팔로워",
-    "followersOf": "{username}의 팔로워",
-    "followingOf": "{username}의 팔로잉",
-    "noFollowers": "아직 팔로워가 없습니다",
-    "noFollowing": "아직 팔로잉하는 사람이 없습니다"
-  },
   "follow": {
     "follow": "팔로우",
     "following": "팔로잉",

messages/ug-CN.json

@@ -402,7 +402,8 @@
       "success": "تېكىست جۈپى قىسقۇچقا قوشۇلدى",
       "error": "تېكىست جۈپىنى قىسقۇچقا قوشۇش مەغلۇپ بولدى"
     },
-    "autoSave": "ئاپتوماتىك ساقلاش"
+    "autoSave": "ئاپتوماتىك ساقلاش",
+    "customLanguage": "ياكى تىل تىل كىرۇڭ..."
   },
   "dictionary": {
     "title": "لۇغەت",
@@ -508,15 +509,6 @@
       "view": "كۆرۈش"
     }
   },
-  "follow": {
-    "follow": "ئەگىشىش",
-    "following": "ئەگىشىۋاتقانلار",
-    "followers": "ئەگەشكۈچىلەر",
-    "followersOf": "{username} نىڭ ئەگەشكۈچىلىرى",
-    "followingOf": "{username} نىڭ ئەگىشىۋاتقانلىرى",
-    "noFollowers": "تېخى ئەگەشكۈچى يوق",
-    "noFollowing": "تېخى ئەگىشىۋاتقان يوق"
-  },
   "follow": {
     "follow": "ئەگىشىش",
     "following": "ئەگىشىۋاتىدۇ",

messages/zh-CN.json

@@ -424,7 +424,8 @@
       "success": "文本对已添加到文件夹",
       "error": "添加文本对到文件夹失败"
     },
-    "autoSave": "自动保存"
+    "autoSave": "自动保存",
+    "customLanguage": "或输入语言..."
   },
   "dictionary": {
     "title": "词典",

scripts/find-missing-translations.ts

@@ -0,0 +1,291 @@
+/**
+ * 查找缺失的翻译键
+ * 
+ * 扫描代码中使用的翻译键，与翻译文件对比，找出缺失的键
+ * 
+ * 用法: npx tsx scripts/find-missing-translations.ts [locale]
+ * 示例: 
+ *   npx tsx scripts/find-missing-translations.ts          # 检查所有语言
+ *   npx tsx scripts/find-missing-translations.ts en-US    # 只检查 en-US
+ */
+
+import * as fs from "fs";
+import * as path from "path";
+
+const SRC_DIR = "./src";
+const MESSAGES_DIR = "./messages";
+
+// 所有支持的语言
+const ALL_LOCALES = [
+  "en-US",
+  "zh-CN", 
+  "ja-JP",
+  "ko-KR",
+  "de-DE",
+  "fr-FR",
+  "it-IT",
+  "ug-CN",
+];
+
+interface FileTranslationUsage {
+  file: string;
+  namespace: string;
+  keys: Set<string>;
+}
+
+/**
+ * 递归获取目录下所有文件
+ */
+function getAllFiles(dir: string, extensions: string[]): string[] {
+  const files: string[] = [];
+  
+  if (!fs.existsSync(dir)) return files;
+  
+  const entries = fs.readdirSync(dir, { withFileTypes: true });
+  
+  for (const entry of entries) {
+    const fullPath = path.join(dir, entry.name);
+    
+    if (entry.isDirectory()) {
+      files.push(...getAllFiles(fullPath, extensions));
+    } else if (entry.isFile() && extensions.some(ext => entry.name.endsWith(ext))) {
+      files.push(fullPath);
+    }
+  }
+  
+  return files;
+}
+
+/**
+ * 从代码文件中提取翻译使用情况
+ */
+function extractTranslationsFromFile(filePath: string): FileTranslationUsage[] {
+  const content = fs.readFileSync(filePath, "utf-8");
+  const usages: FileTranslationUsage[] = [];
+  
+  // 匹配 useTranslations("namespace") 或 getTranslations("namespace")
+  const namespacePattern = /(?:useTranslations|getTranslations)\s*\(\s*["'`]([^"'`]+)["'`]\s*\)/g;
+  
+  // 匹配没有参数的 useTranslations() 或 getTranslations() - 使用根级别
+  const rootNamespacePattern = /(?:useTranslations|getTranslations)\s*\(\s*\)/g;
+  
+  // 首先找到所有的 namespace 声明
+  const namespaces: { name: string; isRoot: boolean }[] = [];
+  let match;
+  
+  while ((match = namespacePattern.exec(content)) !== null) {
+    namespaces.push({ name: match[1], isRoot: false });
+  }
+  
+  // 检查是否有根级别的翻译
+  let hasRootTranslations = false;
+  while ((match = rootNamespacePattern.exec(content)) !== null) {
+    hasRootTranslations = true;
+  }
+  
+  if (namespaces.length === 0 && !hasRootTranslations) {
+    return usages;
+  }
+  
+  // 匹配 t("key") 或 t('key') 或 t(`key`) 调用
+  // 支持简单键、嵌套键、带插值的键
+  const tCallPattern = /\bt\s*\(\s*["'`]([^"'`]+)["'`]\s*(?:,|\))/g;
+  
+  const allKeys = new Set<string>();
+  
+  while ((match = tCallPattern.exec(content)) !== null) {
+    allKeys.add(match[1]);
+  }
+  
+  // 匹配模板字面量动态键 t(`prefix.${variable}`)
+  const dynamicTCallPattern = /\bt\s*\(\s*`([^`]+)\$\{[^}]+\}([^`]*)`\s*(?:,|\))/g;
+  while ((match = dynamicTCallPattern.exec(content)) !== null) {
+    // 标记为动态键，前缀部分
+    const prefix = match[1];
+    if (prefix) {
+      allKeys.add(`[DYNAMIC PREFIX: ${prefix}]`);
+    }
+  }
+  
+  if (allKeys.size === 0) {
+    return usages;
+  }
+  
+  // 为每个 namespace 创建使用记录
+  for (const ns of namespaces) {
+    usages.push({
+      file: filePath,
+      namespace: ns.name,
+      keys: allKeys,
+    });
+  }
+  
+  // 如果有根级别翻译，添加一个特殊的 namespace
+  if (hasRootTranslations) {
+    usages.push({
+      file: filePath,
+      namespace: "__ROOT__",
+      keys: allKeys,
+    });
+  }
+  
+  return usages;
+}
+
+/**
+ * 获取翻译对象中所有的键路径
+ */
+function getAllKeysFromTranslation(obj: Record<string, unknown>, prefix = ""): Set<string> {
+  const keys = new Set<string>();
+  
+  for (const key of Object.keys(obj)) {
+    const fullKey = prefix ? `${prefix}.${key}` : key;
+    keys.add(fullKey);
+    
+    if (typeof obj[key] === "object" && obj[key] !== null) {
+      const nestedKeys = getAllKeysFromTranslation(
+        obj[key] as Record<string, unknown>,
+        fullKey
+      );
+      nestedKeys.forEach(k => keys.add(k));
+    }
+  }
+  
+  return keys;
+}
+
+/**
+ * 检查键是否存在于翻译对象中
+ */
+function keyExistsInTranslation(key: string, namespace: string, translations: Record<string, unknown>): boolean {
+  // 处理根级别翻译
+  if (namespace === "__ROOT__") {
+    const parts = key.split(".");
+    let current: unknown = translations;
+    
+    for (const part of parts) {
+      if (typeof current !== "object" || current === null) {
+        return false;
+      }
+      current = (current as Record<string, unknown>)[part];
+    }
+    
+    return typeof current === "string";
+  }
+  
+  // 处理带命名空间的翻译
+  const nsTranslations = translations[namespace];
+  if (!nsTranslations || typeof nsTranslations !== "object") {
+    return false;
+  }
+  
+  const parts = key.split(".");
+  let current: unknown = nsTranslations;
+  
+  for (const part of parts) {
+    if (typeof current !== "object" || current === null) {
+      return false;
+    }
+    current = (current as Record<string, unknown>)[part];
+  }
+  
+  return typeof current === "string";
+}
+
+/**
+ * 主函数
+ */
+function main() {
+  const targetLocale = process.argv[2];
+  const localesToCheck = targetLocale 
+    ? [targetLocale] 
+    : ALL_LOCALES;
+  
+  console.log("🔍 扫描代码中的翻译使用情况...\n");
+  
+  // 获取所有源代码文件
+  const sourceFiles = [
+    ...getAllFiles(SRC_DIR, [".tsx", ".ts"]),
+  ];
+  
+  // 提取所有翻译使用
+  const allUsages: FileTranslationUsage[] = [];
+  for (const file of sourceFiles) {
+    allUsages.push(...extractTranslationsFromFile(file));
+  }
+  
+  console.log(`📁 扫描了 ${sourceFiles.length} 个文件`);
+  console.log(`📝 发现 ${allUsages.length} 个翻译使用声明\n`);
+  
+  // 检查每种语言
+  for (const locale of localesToCheck) {
+    console.log(`\n${"=".repeat(60)}`);
+    console.log(`🌐 检查语言: ${locale}`);
+    console.log("=".repeat(60));
+    
+    const translationPath = path.join(MESSAGES_DIR, `${locale}.json`);
+    
+    if (!fs.existsSync(translationPath)) {
+      console.log(`❌ 翻译文件不存在: ${translationPath}`);
+      continue;
+    }
+    
+    let translations: Record<string, unknown>;
+    try {
+      const content = fs.readFileSync(translationPath, "utf-8");
+      translations = JSON.parse(content);
+    } catch (e) {
+      console.log(`❌ 翻译文件解析失败: ${translationPath}`);
+      console.log(e);
+      continue;
+    }
+    
+    const missingKeys: { file: string; namespace: string; key: string }[] = [];
+    
+    for (const usage of allUsages) {
+      for (const key of usage.keys) {
+        // 跳过动态键标记
+        if (key.startsWith("[DYNAMIC PREFIX:")) {
+          continue;
+        }
+        
+        if (!keyExistsInTranslation(key, usage.namespace, translations)) {
+          missingKeys.push({
+            file: usage.file,
+            namespace: usage.namespace,
+            key: key,
+          });
+        }
+      }
+    }
+    
+    if (missingKeys.length === 0) {
+      console.log(`✅ 没有缺失的翻译键`);
+    } else {
+      console.log(`\n❌ 发现 ${missingKeys.length} 个缺失的翻译键:\n`);
+      
+      // 按文件分组显示
+      const groupedByFile = new Map<string, typeof missingKeys>();
+      for (const item of missingKeys) {
+        const file = item.file;
+        if (!groupedByFile.has(file)) {
+          groupedByFile.set(file, []);
+        }
+        groupedByFile.get(file)!.push(item);
+      }
+      
+      for (const [file, items] of groupedByFile) {
+        console.log(`📄 ${file}`);
+        for (const item of items) {
+          const nsDisplay = item.namespace === "__ROOT__" ? "(root)" : item.namespace;
+          console.log(`   [${nsDisplay}] ${item.key}`);
+        }
+        console.log();
+      }
+    }
+  }
+  
+  console.log("\n✨ 检查完成！");
+}
+
+main();

scripts/find-unused-translations.ts

@@ -0,0 +1,331 @@
+/**
+ * 查找多余（未使用）的翻译键
+ * 
+ * 扫描翻译文件中的所有键，与代码中实际使用的键对比，找出多余的键
+ * 
+ * 用法: npx tsx scripts/find-unused-translations.ts [locale]
+ * 示例: 
+ *   npx tsx scripts/find-unused-translations.ts          # 检查所有语言
+ *   npx tsx scripts/find-unused-translations.ts en-US    # 只检查 en-US
+ */
+
+import * as fs from "fs";
+import * as path from "path";
+
+const SRC_DIR = "./src";
+const MESSAGES_DIR = "./messages";
+
+// 所有支持的语言
+const ALL_LOCALES = [
+  "en-US",
+  "zh-CN", 
+  "ja-JP",
+  "ko-KR",
+  "de-DE",
+  "fr-FR",
+  "it-IT",
+  "ug-CN",
+];
+
+/**
+ * 递归获取目录下所有文件
+ */
+function getAllFiles(dir: string, extensions: string[]): string[] {
+  const files: string[] = [];
+  
+  if (!fs.existsSync(dir)) return files;
+  
+  const entries = fs.readdirSync(dir, { withFileTypes: true });
+  
+  for (const entry of entries) {
+    const fullPath = path.join(dir, entry.name);
+    
+    if (entry.isDirectory()) {
+      files.push(...getAllFiles(fullPath, extensions));
+    } else if (entry.isFile() && extensions.some(ext => entry.name.endsWith(ext))) {
+      files.push(fullPath);
+    }
+  }
+  
+  return files;
+}
+
+/**
+ * 代码中实际使用的翻译键
+ */
+interface UsedTranslations {
+  // namespace -> Set of keys
+  byNamespace: Map<string, Set<string>>;
+  // 根级别的完整路径 (当使用 useTranslations() 无参数时)
+  rootKeys: Set<string>;
+}
+
+/**
+ * 从代码文件中提取使用的翻译键
+ */
+function extractUsedTranslationsFromFiles(files: string[]): UsedTranslations {
+  const result: UsedTranslations = {
+    byNamespace: new Map(),
+    rootKeys: new Set(),
+  };
+  
+  for (const filePath of files) {
+    const content = fs.readFileSync(filePath, "utf-8");
+    
+    // 匹配 useTranslations("namespace") 或 getTranslations("namespace")
+    const namespacePattern = /(?:useTranslations|getTranslations)\s*\(\s*["'`]([^"'`]+)["'`]\s*\)/g;
+    
+    // 检查是否有根级别的翻译 (无参数调用)
+    const hasRootTranslations = /(?:useTranslations|getTranslations)\s*\(\s*\)/.test(content);
+    
+    // 收集该文件中的所有 namespace
+    const namespaces: string[] = [];
+    let match;
+    
+    while ((match = namespacePattern.exec(content)) !== null) {
+      namespaces.push(match[1]);
+    }
+    
+    // 匹配 t("key") 或 t('key') 或 t(`key`) 调用
+    const tCallPattern = /\bt\s*\(\s*["'`]([^"'`]+)["'`]\s*(?:,|\))/g;
+    
+    const keysInFile = new Set<string>();
+    
+    while ((match = tCallPattern.exec(content)) !== null) {
+      keysInFile.add(match[1]);
+    }
+    
+    // 匹配带命名空间的 t 调用 t("namespace.key") - 跨 namespace 访问
+    const crossNamespacePattern = /\bt\s*\(\s*["'`]([^.]+\.[^"'`]+)["'`]\s*(?:,|\))/g;
+    
+    // 将键添加到对应的 namespace
+    for (const ns of namespaces) {
+      if (!result.byNamespace.has(ns)) {
+        result.byNamespace.set(ns, new Set());
+      }
+      
+      for (const key of keysInFile) {
+        // 检查是否是跨 namespace 访问 (包含点)
+        const dotIndex = key.indexOf(".");
+        if (dotIndex > 0) {
+          const possibleNs = key.substring(0, dotIndex);
+          const remainingKey = key.substring(dotIndex + 1);
+          
+          // 如果第一部分是已知的 namespace，则是跨 namespace 访问
+          if (result.byNamespace.has(possibleNs) || possibleNs !== ns) {
+            // 添加到对应的 namespace
+            if (!result.byNamespace.has(possibleNs)) {
+              result.byNamespace.set(possibleNs, new Set());
+            }
+            result.byNamespace.get(possibleNs)!.add(remainingKey);
+            continue;
+          }
+        }
+        
+        result.byNamespace.get(ns)!.add(key);
+      }
+    }
+    
+    // 如果有根级别翻译，添加到 rootKeys
+    if (hasRootTranslations) {
+      for (const key of keysInFile) {
+        result.rootKeys.add(key);
+      }
+    }
+  }
+  
+  return result;
+}
+
+/**
+ * 获取翻译对象中所有的键路径（带完整路径）
+ */
+function getAllTranslationKeys(
+  obj: Record<string, unknown>,
+  locale: string
+): { namespace: string; key: string; fullPath: string }[] {
+  const result: { namespace: string; key: string; fullPath: string }[] = [];
+  
+  // 获取顶层 namespace
+  for (const ns of Object.keys(obj)) {
+    const nsValue = obj[ns];
+    
+    if (typeof nsValue === "object" && nsValue !== null) {
+      // 递归获取该 namespace 下的所有键
+      const keys = getNestedKeys(nsValue as Record<string, unknown>);
+      
+      for (const key of keys) {
+        result.push({
+          namespace: ns,
+          key: key,
+          fullPath: `${ns}.${key}`,
+        });
+      }
+    } else if (typeof nsValue === "string") {
+      // 顶层直接是字符串值
+      result.push({
+        namespace: ns,
+        key: "",
+        fullPath: ns,
+      });
+    }
+  }
+  
+  return result;
+}
+
+/**
+ * 递归获取嵌套对象的键路径
+ */
+function getNestedKeys(obj: Record<string, unknown>, prefix = ""): string[] {
+  const keys: string[] = [];
+  
+  for (const key of Object.keys(obj)) {
+    const fullKey = prefix ? `${prefix}.${key}` : key;
+    
+    if (typeof obj[key] === "object" && obj[key] !== null) {
+      keys.push(...getNestedKeys(obj[key] as Record<string, unknown>, fullKey));
+    } else if (typeof obj[key] === "string") {
+      keys.push(fullKey);
+    }
+  }
+  
+  return keys;
+}
+
+/**
+ * 检查键是否被代码使用
+ */
+function isKeyUsed(
+  namespace: string,
+  key: string,
+  used: UsedTranslations
+): boolean {
+  // 检查该 namespace 下是否使用了该键
+  const nsKeys = used.byNamespace.get(namespace);
+  if (nsKeys) {
+    // 检查精确匹配
+    if (nsKeys.has(key)) {
+      return true;
+    }
+    
+    // 检查前缀匹配 (父级键被使用时，子键也算被使用)
+    for (const usedKey of nsKeys) {
+      if (key.startsWith(usedKey + ".") || usedKey.startsWith(key + ".")) {
+        return true;
+      }
+    }
+  }
+  
+  // 检查根级别使用
+  for (const rootKey of used.rootKeys) {
+    if (rootKey === `${namespace}.${key}` || rootKey.startsWith(`${namespace}.${key}.`)) {
+      return true;
+    }
+  }
+  
+  // 检查跨 namespace 使用 (t("namespace.key") 形式)
+  for (const [ns, keys] of used.byNamespace) {
+    for (const k of keys) {
+      // 检查是否是跨 namespace 访问
+      if (k.includes(".")) {
+        const fullKey = `${ns}.${k}`;
+        if (fullKey === `${namespace}.${key}`) {
+          return true;
+        }
+      }
+    }
+  }
+  
+  return false;
+}
+
+/**
+ * 主函数
+ */
+function main() {
+  const targetLocale = process.argv[2];
+  const localesToCheck = targetLocale 
+    ? [targetLocale] 
+    : ALL_LOCALES;
+  
+  console.log("🔍 扫描代码中使用的翻译键...\n");
+  
+  // 获取所有源代码文件
+  const sourceFiles = getAllFiles(SRC_DIR, [".tsx", ".ts"]);
+  
+  console.log(`📁 扫描了 ${sourceFiles.length} 个文件`);
+  
+  // 提取代码中使用的翻译
+  const usedTranslations = extractUsedTranslationsFromFiles(sourceFiles);
+  
+  console.log(`📝 发现 ${usedTranslations.byNamespace.size} 个命名空间被使用`);
+  let totalKeys = 0;
+  for (const keys of usedTranslations.byNamespace.values()) {
+    totalKeys += keys.size;
+  }
+  console.log(`📝 发现 ${totalKeys} 个翻译键被使用\n`);
+  
+  // 检查每种语言
+  for (const locale of localesToCheck) {
+    console.log(`\n${"=".repeat(60)}`);
+    console.log(`🌐 检查语言: ${locale}`);
+    console.log("=".repeat(60));
+    
+    const translationPath = path.join(MESSAGES_DIR, `${locale}.json`);
+    
+    if (!fs.existsSync(translationPath)) {
+      console.log(`❌ 翻译文件不存在: ${translationPath}`);
+      continue;
+    }
+    
+    let translations: Record<string, unknown>;
+    try {
+      const content = fs.readFileSync(translationPath, "utf-8");
+      translations = JSON.parse(content);
+    } catch (e) {
+      console.log(`❌ 翻译文件解析失败: ${translationPath}`);
+      console.log(e);
+      continue;
+    }
+    
+    // 获取翻译文件中的所有键
+    const allTranslationKeys = getAllTranslationKeys(translations, locale);
+    
+    console.log(`📊 翻译文件中共有 ${allTranslationKeys.length} 个翻译键`);
+    
+    // 找出未使用的键
+    const unusedKeys = allTranslationKeys.filter(
+      item => !isKeyUsed(item.namespace, item.key, usedTranslations)
+    );
+    
+    if (unusedKeys.length === 0) {
+      console.log(`✅ 没有多余的翻译键`);
+    } else {
+      console.log(`\n⚠️  发现 ${unusedKeys.length} 个可能多余的翻译键:\n`);
+      
+      // 按 namespace 分组显示
+      const groupedByNs = new Map<string, typeof unusedKeys>();
+      for (const item of unusedKeys) {
+        if (!groupedByNs.has(item.namespace)) {
+          groupedByNs.set(item.namespace, []);
+        }
+        groupedByNs.get(item.namespace)!.push(item);
+      }
+      
+      for (const [ns, items] of groupedByNs) {
+        console.log(`📦 ${ns}`);
+        for (const item of items) {
+          console.log(`   ${item.key || "(root value)"}`);
+        }
+        console.log();
+      }
+      
+      console.log("💡 提示: 这些键可能被动态使用（如 t(`prefix.${var}`)），请人工确认后再删除。");
+    }
+  }
+  
+  console.log("\n✨ 检查完成！");
+}
+
+main();

src/app/(features)/translator/page.tsx

@@ -1,8 +1,8 @@
 "use client";
 
-import { LightButton, PrimaryButton,
+import { LightButton, PrimaryButton, IconClick } from "@/design-system/base/button";
- IconClick } from "@/design-system/base/button";
 import { Select } from "@/design-system/base/select";
+import { Input } from "@/design-system/base/input";
 import { Textarea } from "@/design-system/base/textarea";
 import { IMAGES } from "@/config/images";
 import { useAudioPlayer } from "@/hooks/useAudioPlayer";
@@ -46,6 +46,7 @@ export default function TranslatorPage() {
   const taref = useRef<HTMLTextAreaElement>(null);
   const [sourceLanguage, setSourceLanguage] = useState<string>("Auto");
   const [targetLanguage, setTargetLanguage] = useState<string>("Chinese");
+  const [customTargetLanguage, setCustomTargetLanguage] = useState<string>("");
   const [translationResult, setTranslationResult] = useState<TSharedTranslationResult | null>(null);
   const [needIpa, setNeedIpa] = useState(true);
   const [processing, setProcessing] = useState(false);
@@ -93,18 +94,18 @@ export default function TranslatorPage() {
     setProcessing(true);
 
     const sourceText = taref.current.value;
+    const effectiveTargetLanguage = customTargetLanguage.trim() || targetLanguage;
 
     // 判断是否需要强制重新翻译
-    // 只有当源文本、源语言和目标语言都与上次相同时，才强制重新翻译
     const forceRetranslate =
       lastTranslation?.sourceText === sourceText &&
       lastTranslation?.sourceLanguage === sourceLanguage &&
-      lastTranslation?.targetLanguage === targetLanguage;
+      lastTranslation?.targetLanguage === effectiveTargetLanguage;
 
     try {
       const result = await actionTranslateText({
         sourceText,
-        targetLanguage,
+        targetLanguage: effectiveTargetLanguage,
         forceRetranslate,
         needIpa,
         sourceLanguage: sourceLanguage === "Auto" ? undefined : sourceLanguage,
@@ -115,7 +116,7 @@ export default function TranslatorPage() {
         setLastTranslation({
           sourceText,
           sourceLanguage,
-          targetLanguage,
+          targetLanguage: effectiveTargetLanguage,
         });
       } else {
         toast.error(result.message || "翻译失败，请重试");
@@ -246,39 +247,43 @@ export default function TranslatorPage() {
           <div className="option2 w-full flex gap-1 items-center overflow-x-auto">
             <span className="shrink-0">{t("translateInto")}</span>
             <LightButton
-              selected={targetLanguage === "Chinese"}
+              selected={!customTargetLanguage && targetLanguage === "Chinese"}
-              onClick={() => setTargetLanguage("Chinese")}
+              onClick={() => {
+                setTargetLanguage("Chinese");
+                setCustomTargetLanguage("");
+              }}
               className="shrink-0 hidden lg:inline-flex"
             >
               {t("chinese")}
             </LightButton>
             <LightButton
-              selected={targetLanguage === "English"}
+              selected={!customTargetLanguage && targetLanguage === "English"}
-              onClick={() => setTargetLanguage("English")}
+              onClick={() => {
+                setTargetLanguage("English");
+                setCustomTargetLanguage("");
+              }}
               className="shrink-0 hidden lg:inline-flex"
             >
               {t("english")}
             </LightButton>
             <LightButton
-              selected={targetLanguage === "Japanese"}
+              selected={!customTargetLanguage && targetLanguage === "Japanese"}
-              onClick={() => setTargetLanguage("Japanese")}
+              onClick={() => {
+                setTargetLanguage("Japanese");
+                setCustomTargetLanguage("");
+              }}
               className="shrink-0 hidden xl:inline-flex"
             >
               {t("japanese")}
             </LightButton>
-            <Select
+            <Input
-              value={targetLanguage}
+              variant="bordered"
-              onChange={(e) => setTargetLanguage(e.target.value)}
-              variant="light"
               size="sm"
-              className="w-auto min-w-[100px] shrink-0"
+              value={customTargetLanguage}
-            >
+              onChange={(e) => setCustomTargetLanguage(e.target.value)}
-              {TARGET_LANGUAGES.map((lang) => (
+              placeholder={t("customLanguage")}
-                <option key={lang.value} value={lang.value}>
+              className="w-auto min-w-[120px] shrink-0"
-                  {t(lang.labelKey)}
+            />
-                </option>
-              ))}
-            </Select>
           </div>
         </div>
       </div>