Initial commit: KiddOs v3 React kiosk

- React 18 + Vite 5 hot-reload OS (800x480 Nord theme)
- 7 apps: Journal, Calculator, Drawing, CodeLab, Clock, Files, Scratch
- Cage + Cog Wayland kiosk, offline localStorage
- Scripts: dev.sh, run-kiosk.sh, run-prod.sh

webapp/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "kiddos-v3-react",
+  "private": true,
+  "version": "3.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite --host 0.0.0.0 --port 5173",
+    "build": "vite build",
+    "preview": "vite preview --host 0.0.0.0 --port 4173"
+  },
+  "dependencies": {
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-react": "^4.3.1",
+    "vite": "^5.4.0"
+  }
+}