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/README.md

@@ -38,6 +38,8 @@ bun run electron:dev
 
 `bun run electron:dev` starts the web dev server with HMR, then launches Electron against `packages/electron/main.mjs`.
 
+The Electron workspace package trusts Electron's install script so `bun install` downloads the platform runtime in fresh checkouts and worktrees.
+
 Useful variants:
 
 ```bash

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",