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-lock.json

@@ -9,6 +9,7 @@
       "version": "0.1.0",
       "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",
@@ -18,6 +19,7 @@
         "@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",
@@ -2304,6 +2306,16 @@
         "assertion-error": "^2.0.1"
       }
     },
+    "node_modules/@types/cross-spawn": {
+      "version": "6.0.6",
+      "resolved": "https://registry.npmjs.org/@types/cross-spawn/-/cross-spawn-6.0.6.tgz",
+      "integrity": "sha512-fXRhhUkG4H3TQk5dBhQ7m/JDdSNHKwR2BBia62lhwEIq9xGiQKLxd6LymNhn47SjXhsUEPmxi+PKw2OkW4LLjA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/debug": {
       "version": "4.1.13",
       "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.13.tgz",