fix(web): raise workbox precache limit for oversized main chunk

The app's main chunk grew past workbox's 2MiB default precache cap,
which made vite-plugin-pwa fail the production build (and would have
failed the GitHub Pages deploy too). Raise the limit to 4MiB so the
SPA stays fully precached for offline use.

via [HAPI](https://hapi.run)

Co-Authored-By: HAPI <noreply@hapi.run>
Co-Authored-By: Claude <noreply@anthropic.com>

web/vite.config.ts

@@ -155,7 +155,10 @@ export default defineConfig({
                 }
             },
             injectManifest: {
-                globPatterns: ['**/*.{js,css,html,ico,png,svg,woff,woff2}']
+                globPatterns: ['**/*.{js,css,html,ico,png,svg,woff,woff2}'],
+                // The app's main chunk exceeds workbox's 2MiB default precache
+                // cap; raising the limit keeps the SPA fully precached offline.
+                maximumFileSizeToCacheInBytes: 4 * 1024 * 1024,
             },
             devOptions: {
                 enabled: true,