feat(companion): add Electron presentation layer with React UI, IPC handlers, and automation POC

package.json

@@ -18,13 +18,25 @@
     "test:integration": "vitest run tests/integration",
     "test:e2e": "vitest run tests/e2e",
     "test:watch": "vitest watch",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "companion:build": "tsc -p tsconfig.electron.json && vite build --config vite.config.electron.ts",
+    "companion:start": "npm run companion:build && electron dist/main/index.js"
   },
   "devDependencies": {
     "@cucumber/cucumber": "^11.0.1",
     "@types/node": "^22.10.2",
+    "@types/react": "^18.2.0",
+    "@types/react-dom": "^18.2.0",
+    "@vitejs/plugin-react": "^4.2.0",
     "@vitest/ui": "^2.1.8",
+    "electron": "^28.0.0",
     "typescript": "^5.7.2",
+    "vite": "^6.0.3",
     "vitest": "^2.1.8"
-  }
+  },
+  "dependencies": {
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
+  },
+  "main": "dist/main/index.js"
 }