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

.gitignore

@@ -0,0 +1,24 @@
+# Dependencies
+node_modules/
+webapp/node_modules/
+
+# Build output
+webapp/dist/
+dist/
+build/
+
+# Vite
+.vite/
+
+# Logs
+*.log
+npm-debug.log*
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Env
+.env
+.env.local
+