Migrate JavaScript to TypeScript with full type safety

- Rename all .js/.jsx files to .ts/.tsx across resources/js and theme dirs
- Add TypeScript 6.0 with strict mode, tsconfig.json
- Add type definitions for Inertia page props, Alpine.js, Turbolinks
- Update vite.config.js entries to .ts/.tsx extensions
- Update all Blade @vite() calls to match new .ts/.tsx entry points
- Add TypeScript ESLint config (replacing unused Vue plugin)
- Add @types/react, @types/react-dom, @types/lodash
- Add typecheck script and integrate into check pipeline
- Full tsc --noEmit, ESLint, and production build pass cleanly

resources/js/bootstrap.js

@@ -1,34 +0,0 @@
-import _ from "lodash";
-window._ = _;
-
-/**
- * We'll load the axios HTTP library which allows us to easily issue requests
- * to our Laravel back-end. This library automatically handles sending the
- * CSRF token as a header based on the value of the "XSRF" token cookie.
- */
-
-import axios from "axios";
-window.axios = axios;
-
-window.axios.defaults.headers.common["X-Requested-With"] = "XMLHttpRequest";
-
-/**
- * Echo exposes an expressive API for subscribing to channels and listening
- * for events that are broadcast by Laravel. Echo and event broadcasting
- * allows your team to easily build robust real-time web applications.
- */
-
-// import Echo from 'laravel-echo';
-
-// import Pusher from 'pusher-js';
-// window.Pusher = Pusher;
-
-// window.Echo = new Echo({
-//     broadcaster: 'pusher',
-//     key: import.meta.env.VITE_PUSHER_APP_KEY,
-//     wsHost: import.meta.env.VITE_PUSHER_HOST ?? `ws-${import.meta.env.VITE_PUSHER_APP_CLUSTER}.pusher.com`,
-//     wsPort: import.meta.env.VITE_PUSHER_PORT ?? 80,
-//     wssPort: import.meta.env.VITE_PUSHER_PORT ?? 443,
-//     forceTLS: (import.meta.env.VITE_PUSHER_SCHEME ?? 'https') === 'https',
-//     enabledTransports: ['ws', 'wss'],
-// });