feat : planner adapt to task failure + temporary remove frontend task panel

sources/agents/agent.py

@@ -78,6 +78,10 @@ class Agent():
     def get_tools(self) -> dict:
         return self.tools
     
+    @property
+    def get_success(self) -> bool:
+        return self.success
+    
     def get_blocks_result(self) -> list:
         return self.blocks_result