feat(auto-trading): integrate MetaApi for automated trading

- Add metaapi.cloud-sdk for broker integration
- Implement AutoTradingView component
- Extend Signal interface with secondary take-profit levels
- Update UI to include auto-trading navigation tab

package.json

@@ -27,6 +27,7 @@
     "firebase": "^12.12.1",
     "lightweight-charts": "^5.2.0",
     "lucide-react": "^0.546.0",
+    "metaapi.cloud-sdk": "^29.3.3",
     "motion": "^12.23.24",
     "onesignal-node": "^3.4.0",
     "react": "^19.0.0",