Claude Code: Simplify brain import in error_handlers.py

Remove redundant sys.path manipulation - openclaw/__init__.py already
sets up the path correctly. Match the import pattern used in app.py.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

error_handlers.py

@@ -148,14 +148,9 @@ def handle_brain_response(message: str) -> str:
         AttributeError: If required brain methods are missing.
     """
     try:
-        # Import openclaw first to set up sys.path, then import agents
+        # Import openclaw first - it sets up sys.path to include .openclaw
+        # Then we can import agents directly (same pattern as app.py)
         import openclaw
-        # Ensure .openclaw path is added for agents import
-        import sys
-        from pathlib import Path
-        _openclaw_internal = Path(__file__).parent / "openclaw" / ".openclaw"
-        if str(_openclaw_internal) not in sys.path:
-            sys.path.insert(0, str(_openclaw_internal))
         from agents import brain_minimal
 
         brain = brain_minimal.get_brain(agent_name="cain", legacy_mode=True)