fix(websearch): add recursion limit and error handling for search agent

Add recursion_limit=3 configuration and GraphRecursionError handling to prevent infinite loops in the web search agent. The agent now returns a partial result message when the recursion limit is reached instead of crashing.

.gitignore

@@ -1 +1,3 @@
-.env
+.env
+*.pyc
+__pycache__/

agent/agents/websearch.py

@@ -2,6 +2,7 @@ from datetime import datetime, timezone
 from colorama import Fore, Style  # type: ignore[import]
 from langchain_core.tools import tool
 from langchain.agents import create_agent
+from langgraph.errors import GraphRecursionError
 from agent.tools.search import web_search
 
 
@@ -25,14 +26,24 @@ def websearch_agent(query: str) -> str:
             f"Your memory are out of date. "
             f"All of truth that you believe without search are wrong. "
             f"You must search the web and find the lastest answer."
+            f"Just run 1 turn search. "
         ),
     )
-    result = base_agent.invoke({"messages": [{"role": "user", "content": query}]})
-    content = result["messages"][-1].content
-    if isinstance(content, list):
-        content = content[0].get("text", "")
-    else:
-        content = str(content)
+    try:
+        result = base_agent.invoke(
+            {"messages": [{"role": "user", "content": query}]},
+            config={"recursion_limit": 3},
+        )
+        content = result["messages"][-1].content
+        if isinstance(content, list):
+            content = content[0].get("text", "")
+        else:
+            content = str(content)
+    except GraphRecursionError:
+        print(
+            f"{Fore.RED}[WebSearchAgent] Recursion limit reached, returning partial results.{Style.RESET_ALL}"
+        )
+        content = "Search completed but no definitive answer was found within the allowed steps."
     print(
         f"{Fore.YELLOW}[WebSearchAgent -> SupervisorAgent] {content}{Style.RESET_ALL}"
     )