feat: enable React Scan in web HMR dev mode

Adds a new `hmr-react-scan` web dev option in `oc-dev`
Turns on React Scan via `VITE_ENABLE_REACT_SCAN` for that mode
Documents Electron workspace trust so fresh installs fetch the runtime automatically

packages/electron/package.json

@@ -17,6 +17,9 @@
     "electron": "^41.2.1",
     "electron-builder": "^26.0.0"
   },
+  "trustedDependencies": [
+    "electron"
+  ],
   "desktopPrerequisites": [
     "Electron runtime dependencies installed via bun install",
     "Bun available for sidecar compilation",