diff --git a/AGENTS.md b/AGENTS.md
index 3e54038..e12a4f5 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,7 +1,7 @@
 # LEARN-LANGUAGES 知识库
 
 **生成时间:** 2026-03-08
-**提交:** 91c59c3
+**提交:** 6ba5ae9
 **分支:** dev
 
 ## 概述
@@ -112,6 +112,7 @@ log.error("Failed to fetch folders", { error });
 - ❌ Server Component 可行时用 Client Component
 - ❌ npm 或 yarn (使用 pnpm)
 - ❌ 生产代码中使用 `console.log` (使用 winston logger)
+- ❌ 擅自运行 `pnpm dev` (不需要，用 `pnpm build` 验证即可)
 
 ## 独特风格
 
diff --git a/src/lib/bigmodel/dictionary/orchestrator.ts b/src/lib/bigmodel/dictionary/orchestrator.ts
index 782d154..fe57196 100644
--- a/src/lib/bigmodel/dictionary/orchestrator.ts
+++ b/src/lib/bigmodel/dictionary/orchestrator.ts
@@ -53,7 +53,7 @@ export async function executeDictionaryLookup(
 
         if (!standardFormResult.standardForm) {
             log.error("[Stage 3] Standard form is empty");
-            throw "无法生成标准形式";
+            throw new LookUpError("无法生成标准形式");
         }
 
         log.debug("[Stage 3] Standard form complete", { standardFormResult });
diff --git a/src/lib/bigmodel/dictionary/stage1-inputAnalysis.ts b/src/lib/bigmodel/dictionary/stage1-inputAnalysis.ts
index 409e0b3..fe028e3 100644
--- a/src/lib/bigmodel/dictionary/stage1-inputAnalysis.ts
+++ b/src/lib/bigmodel/dictionary/stage1-inputAnalysis.ts
@@ -55,6 +55,14 @@ export async function analyzeInput(text: string): Promise<InputAnalysisResult> {
             throw new Error("阶段1：isValid 字段类型错误");
         }
 
+        if (typeof result.isEmpty !== "boolean") {
+            throw new Error("阶段1：isEmpty 字段类型错误");
+        }
+
+        if (typeof result.isNaturalLanguage !== "boolean") {
+            throw new Error("阶段1：isNaturalLanguage 字段类型错误");
+        }
+
         // 确保 reason 字段存在
         if (typeof result.reason !== "string") {
             result.reason = "";
diff --git a/src/lib/bigmodel/dictionary/stage2-semanticMapping.ts b/src/lib/bigmodel/dictionary/stage2-semanticMapping.ts
index 7052b5b..263e719 100644
--- a/src/lib/bigmodel/dictionary/stage2-semanticMapping.ts
+++ b/src/lib/bigmodel/dictionary/stage2-semanticMapping.ts
@@ -9,7 +9,7 @@ const log = createLogger("dictionary-stage2");
  * 阶段 2：跨语言语义映射决策
  *
  * 独立的 LLM 调用，决定是否需要语义映射
- * 如果输入不符合"明确、基础、可词典化的语义概念"且语言不一致，直接返回失败
+ * 如果输入不符合"明确、基础、可词典化的语义概念"且语言不一致，则降级使用原始输入
  */
 
 export async function determineSemanticMapping(
@@ -86,9 +86,17 @@ b) 输入是明确、基础、可词典化的语义概念
             result.reason = "";
         }
 
-        // 如果不应该映射，返回错误
+        // 如果不应该映射，返回降级结果（不抛出错误）
+        // 这样可以让后续阶段使用原始输入继续处理
         if (!result.shouldMap) {
-            throw new Error(result.reason || "输入不符合可词典化的语义概念，无法进行跨语言查询");
+            log.debug("Semantic mapping not applicable, using original input", { 
+                reason: result.reason 
+            });
+            return {
+                shouldMap: false,
+                canMap: result.canMap ?? false,
+                reason: result.reason,
+            };
         }
 
         if (!result.mappedQuery || result.mappedQuery.trim().length === 0) {
@@ -97,6 +105,7 @@ b) 输入是明确、基础、可词典化的语义概念
 
         return {
             shouldMap: result.shouldMap,
+            canMap: result.canMap ?? true,
             coreSemantic: result.coreSemantic,
             mappedQuery: result.mappedQuery,
             reason: result.reason,
diff --git a/src/lib/bigmodel/dictionary/types.ts b/src/lib/bigmodel/dictionary/types.ts
index 38a8bdb..e94eef2 100644
--- a/src/lib/bigmodel/dictionary/types.ts
+++ b/src/lib/bigmodel/dictionary/types.ts
@@ -20,6 +20,7 @@ export interface InputAnalysisResult {
 // 阶段2：语义映射结果
 export interface SemanticMappingResult {
     shouldMap: boolean;
+    canMap?: boolean;
     coreSemantic?: string;
     mappedQuery?: string;
     reason: string;
diff --git a/src/lib/bigmodel/zhipu.ts b/src/lib/bigmodel/zhipu.ts
index e2eb659..e617750 100644
--- a/src/lib/bigmodel/zhipu.ts
+++ b/src/lib/bigmodel/zhipu.ts
@@ -2,10 +2,15 @@
 
 type Messages = { role: string; content: string; }[];
 
+const LLM_TIMEOUT_MS = 30000;
+
 async function callZhipuAPI(
   messages: Messages,
   model = process.env.ZHIPU_MODEL_NAME,
 ) {
+  const controller = new AbortController();
+  const timeoutId = setTimeout(() => controller.abort(), LLM_TIMEOUT_MS);
+
   const url = "https://open.bigmodel.cn/api/paas/v4/chat/completions";
 
   const response = await fetch(url, {
@@ -22,8 +27,11 @@ async function callZhipuAPI(
         type: "disabled",
       },
     }),
+    signal: controller.signal,
   });
 
+  clearTimeout(timeoutId);
+
   if (!response.ok) {
     throw new Error(`API 调用失败: ${response.status} ${response.statusText}`);
   }
@@ -42,4 +50,4 @@ async function getAnswer(prompt: string | Messages): Promise<string> {
   return response.choices[0].message.content.trim() as string;
 }
 
-export { getAnswer };
\ No newline at end of file
+export { getAnswer };