feat: 完善子图，添加路由函数和审核节点

backend/app/agent_subgraphs/common/__init__.py

@@ -3,10 +3,10 @@
 提供可复用的基础组件
 
 导出：
-- formatter: 格式化输出工具
-- intent: 意图理解工具
-- human_review: 人工审核工具
-- state_base: 状态基类工具
+- formatter.py: 格式化输出工具
+- intent.py: 意图理解工具
+- human_review.py: 人工审核工具
+- state_base.py: 状态基类工具
 """
 
 from .formatter import (

backend/app/agent_subgraphs/contact/api_client.py

@@ -192,6 +192,45 @@ class ContactAPIClient:
             "suggestion": "是否添加这些联系人？"
         }
 
+    # 公共方法
+    def list_contacts(self, user_id: str = "default") -> List[Contact]:
+        """查询联系人列表"""
+        return self.list_contacts_mock(user_id)
+
+    def add_contact(self, user_id: str, contact: Contact) -> bool:
+        """添加联系人"""
+        return self.save_contact_mock(user_id, contact)
+
+    def list_emails(self, user_id: str = "default") -> List[Email]:
+        """查询邮件列表"""
+        return self.list_emails_mock()
+
+    def generate_email_draft(self, query: str) -> Dict[str, str]:
+        """生成邮件草稿"""
+        return self.generate_email_draft_mock(query)
+
+    def send_email(self, user_id: str, recipient: str, subject: str, body: str) -> bool:
+        """发送邮件"""
+        result = self.send_email_mock(recipient, subject, body)
+        return result.get("success", False)
+
+    def sniff_contacts(self, query: str) -> List[Contact]:
+        """智能嗅探联系人"""
+        result = self.sniff_contacts_mock(query)
+        contact_dicts = result.get("contacts", [])
+        return [
+            Contact(
+                id=str(i+1),
+                name=c.get("name", ""),
+                phone=c.get("phone", ""),
+                email=c.get("email", ""),
+                company="",
+                position="",
+                created_at=datetime.now().isoformat()
+            )
+            for i, c in enumerate(contact_dicts)
+        ]
+
 
 # 单例实例
 contact_api = ContactAPIClient()

backend/app/agent_subgraphs/contact/nodes.py

@@ -172,5 +172,59 @@ def format_result(state: ContactState) -> ContactState:
     state.final_result = "\n".join(output_lines)
     state.success = True
     state.current_phase = "completed"
-    
+
     return state
+
+
+def human_review(state: ContactState) -> ContactState:
+    """
+    人工审核节点（用于邮件草稿）
+    """
+    state.current_phase = "reviewing"
+    # 标记需要审核，等待用户决定
+    state.needs_approval = True
+    return state
+
+
+def send_email(state: ContactState) -> ContactState:
+    """
+    发送邮件节点
+    """
+    state.current_phase = "executing"
+    # 使用 API 客户端发送邮件
+    success = contact_api.send_email(
+        state.user_id,
+        state.draft_recipient,
+        state.draft_subject,
+        state.draft_body
+    )
+    state.success = success
+    return state
+
+
+def should_continue(state: ContactState) -> str:
+    """
+    条件路由函数：根据 action 和状态决定下一个节点
+    """
+    # 如果是从 human_review 来的，根据审核状态决定
+    if state.current_phase == "reviewing":
+        if state.needs_approval:
+            # 这里会等待用户操作，实际运行时通过 checkpointer 或后端 API 处理
+            return "format_result"
+        else:
+            return "send_email"
+
+    # 普通路由
+    action = state.action
+    if action == ContactAction.CONTACT_LIST:
+        return "list_contacts"
+    elif action == ContactAction.CONTACT_ADD:
+        return "add_contact"
+    elif action == ContactAction.EMAIL_LIST:
+        return "list_emails"
+    elif action == ContactAction.EMAIL_SEND:
+        return "generate_email_draft"
+    elif action == ContactAction.SNIFF_CONTACTS:
+        return "sniff_contacts"
+    else:
+        return "format_result"

backend/app/agent_subgraphs/dictionary/nodes.py

@@ -250,5 +250,28 @@ def format_result(state: DictionaryState) -> DictionaryState:
     state.final_result = "\n".join(output_lines)
     state.success = True
     state.current_phase = "completed"
+
+    return state
+
+
+def should_continue(state: DictionaryState) -> str:
+    """
+    条件路由函数：根据 action 决定下一个节点
+    """
+    action = state.action
+    if action == DictionaryAction.QUERY:
+        return "query_word"
+    elif action == DictionaryAction.TRANSLATE:
+        return "translate_text"
+    elif action == DictionaryAction.EXTRACT:
+        return "extract_terms"
+    elif action == DictionaryAction.DAILY_WORD:
+        return "get_daily_word"
+    elif action == DictionaryAction.LOOKUP_WORD_BOOK:
+        return "lookup_word_book"
+    elif action == DictionaryAction.ADD_TO_WORD_BOOK:
+        return "add_to_word_book"
+    else:
+        return "format_result"
     
     return state

backend/app/agent_subgraphs/news_analysis/nodes.py

@@ -164,5 +164,22 @@ def format_result(state: NewsAnalysisState) -> NewsAnalysisState:
     state.final_result = "\n".join(output_lines)
     state.success = True
     state.current_phase = "completed"
-    
+
     return state
+
+
+def should_continue(state: NewsAnalysisState) -> str:
+    """
+    条件路由函数：根据 action 决定下一个节点
+    """
+    action = state.action
+    if action == NewsAction.QUERY:
+        return "query_news"
+    elif action == NewsAction.ANALYZE_URL:
+        return "analyze_url"
+    elif action == NewsAction.EXTRACT_KEYWORDS:
+        return "extract_keywords"
+    elif action == NewsAction.GENERATE_REPORT:
+        return "generate_report"
+    else:
+        return "format_result"