集成三个子图到主Agent架构 + 修复前后端字段不匹配问题

主要变更：
1. 创建 subgraph_tools.py - 将三个子图包装为 LangChain 工具
2. 更新 graph_tools.py - 删除旧工具，添加子图工具
3. 更新系统提示词 - 介绍三个子系统 + RAG 能力
4. 简化 backend.py - 删除独立子图 API 端点
5. 修复 service.py 字段名不匹配问题 - content -> token
6. 前端界面优化 - 移动子图测试到侧边栏、删除测试审核按钮
7. 添加 pyjwt 依赖到 requirements.txt
8. 更新 docker-compose.yml - 添加前端代码挂载

frontend/src/components/chat_area.py

@@ -393,32 +393,6 @@ def _render_review_confirmation():
         except Exception as e:
             st.session_state.review_error = str(e)
     
-    # 测试按钮 - 用于演示审核功能
-    with st.container():
-        st.markdown("<div style='height: 20px;'></div>", unsafe_allow_html=True)
-        col_test, col_info = st.columns([1, 3])
-        with col_test:
-            if st.button("🔧 测试审核", key="test_review_chat"):
-                # 创建一个测试审核请求
-                test_content = "这是一条待审核的测试内容。\n\n您可以选择：\n✅ 确定 - 批准此内容\n✏️ 修改 - 修改后批准\n❌ 拒绝 - 拒绝此内容"
-                review_id = api_client.request_review(thread_id, user_id, test_content)
-                if review_id:
-                    st.session_state.pending_review = {
-                        "review_id": review_id,
-                        "content_to_review": test_content,
-                        "created_at": "2024-01-01T12:00:00",
-                        "user_id": user_id
-                    }
-                    st.success("✅ 已创建测试审核")
-                    st.rerun()
-                else:
-                    st.error("❌ 创建测试审核失败")
-        with col_info:
-            if st.session_state.get("review_error"):
-                st.warning(f"⚠️ {st.session_state.review_error}")
-            elif st.session_state.pending_review:
-                st.info("📋 有待审核内容")
-    
     # 显示审核确认界面
     if st.session_state.pending_review:
         review = st.session_state.pending_review

frontend/src/components/sidebar.py

@@ -21,6 +21,17 @@ def render_sidebar():
     # 底部放用户部分
     st.divider()
     _render_user_section()
+    
+    # 子图测试面板：放在最底部的角落里
+    st.divider()
+    with st.expander("🔧 测试工具", expanded=False):
+        from components.subgraph_panel import _render_dictionary_panel, _render_news_panel, _render_contact_panel
+        st.caption("📚 词典子图")
+        _render_dictionary_panel()
+        st.caption("📰 资讯子图")
+        _render_news_panel()
+        st.caption("📇 通讯录子图")
+        _render_contact_panel()
 
 def _render_user_section():
     """渲染用户登录区域"""

frontend/src/frontend_main.py

@@ -19,14 +19,12 @@ if __name__ == '__main__':
     from components.sidebar import render_sidebar
     from components.chat_area import render_chat_area
     from components.info_panel import render_info_panel
-    from components.subgraph_panel import render_subgraph_panel
 else:
     from .config import config
     from .state import AppState
     from .components.sidebar import render_sidebar
     from .components.chat_area import render_chat_area
     from .components.info_panel import render_info_panel
-    from .components.subgraph_panel import render_subgraph_panel
 
 
 # =============================================================================
@@ -129,10 +127,6 @@ def main():
     
     # 中间主区域：全宽的聊天区域
     render_chat_area()
-    
-    # 底部：子图测试面板
-    st.divider()
-    render_subgraph_panel()
 
 
 if __name__ == "__main__":