feat: add secure multi-runtime controls

Make agent backends configurable and governable with encrypted credentials, explicit context sharing, and tool approval boundaries.

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

package.json

@@ -46,6 +46,7 @@
   },
   "dependencies": {
     "@opencode-ai/sdk": "^1.18.9",
+    "cross-spawn": "^7.0.6",
     "lucide-react": "^1.27.0",
     "react": "^19.2.8",
     "react-dom": "^19.2.8",
@@ -55,6 +56,7 @@
     "@eslint/js": "^10.0.1",
     "@testing-library/jest-dom": "^7.0.0",
     "@testing-library/react": "^16.3.2",
+    "@types/cross-spawn": "^6.0.6",
     "@types/node": "^26.1.2",
     "@types/react": "^19.2.17",
     "@types/react-dom": "^19.2.3",