some cleanups

tools/terminal_tool.py

@@ -139,7 +139,7 @@ def terminal_tool(
                 "exit_code": -1,
                 "error": f"Terminal tool is disabled due to import error: {import_error}",
                 "status": "disabled"
-            })
+            }, ensure_ascii=False)
 
         # Get configuration from environment
         vm_lifetime_seconds = int(os.getenv("HECATE_VM_LIFETIME_SECONDS", "300"))
@@ -155,7 +155,7 @@ def terminal_tool(
                 "exit_code": -1,
                 "error": "MORPH_API_KEY environment variable not set",
                 "status": "disabled"
-            })
+            }, ensure_ascii=False)
 
         # Get or create VM instance and execution context
         # This is critical for interactive session support - the context must persist!
@@ -219,7 +219,7 @@ def terminal_tool(
             "status": "active" if result.get("session_id") else "ended"
         }
 
-        return json.dumps(formatted_result)
+        return json.dumps(formatted_result, ensure_ascii=False)
 
     except Exception as e:
         return json.dumps({
@@ -229,7 +229,7 @@ def terminal_tool(
             "exit_code": -1,
             "error": f"Failed to execute terminal command: {str(e)}",
             "status": "error"
-        })
+        }, ensure_ascii=False)
 
 def check_hecate_requirements() -> bool:
     """