feat: decline pending action

traderai/tools.py

@@ -241,6 +241,20 @@ class ToolRegistry:
             return {"error": f"Pending action not found: {action_id}"}
         return await self.uex.post(action.endpoint, action.payload, authenticated=True)
 
+    async def decline(self, action_id: str) -> dict[str, Any]:
+        action = self.pending_actions.pop(action_id, None)
+        if not action:
+            return {"error": f"Pending action not found: {action_id}"}
+        return {
+            "declined": True,
+            "pending_action": {
+                "id": action.id,
+                "label": action.label,
+                "endpoint": action.endpoint,
+                "payload": action.payload,
+            },
+        }
+
     async def search_marketplace_listings(
         self,
         query: str | None = None,