feat: config max_search_results for search engine (#192)

* feat: implement UI

* feat: config max_search_results for search engine via api

---------

Co-authored-by: Henry Li <henry1943@163.com>

src/server/app.py

@@ -61,6 +61,7 @@ async def chat_stream(request: ChatRequest):
             thread_id,
             request.max_plan_iterations,
             request.max_step_num,
+            request.max_search_results,
             request.auto_accepted_plan,
             request.interrupt_feedback,
             request.mcp_settings,
@@ -75,6 +76,7 @@ async def _astream_workflow_generator(
     thread_id: str,
     max_plan_iterations: int,
     max_step_num: int,
+    max_search_results: int,
     auto_accepted_plan: bool,
     interrupt_feedback: str,
     mcp_settings: dict,
@@ -101,6 +103,7 @@ async def _astream_workflow_generator(
             "thread_id": thread_id,
             "max_plan_iterations": max_plan_iterations,
             "max_step_num": max_step_num,
+            "max_search_results": max_search_results,
             "mcp_settings": mcp_settings,
         },
         stream_mode=["messages", "updates"],

src/server/chat_request.py

@@ -38,6 +38,9 @@ class ChatRequest(BaseModel):
     max_step_num: Optional[int] = Field(
         3, description="The maximum number of steps in a plan"
     )
+    max_search_results: Optional[int] = Field(
+        3, description="The maximum number of search results"
+    )
     auto_accepted_plan: Optional[bool] = Field(
         False, description="Whether to automatically accept the plan"
     )