fix(web): ignore .svelte-kit/generated in vite watcher

Prevents spurious full-page reloads when svelte-kit sync runs
externally (e.g. during `just check`). The SvelteKit vite plugin
already watches source files and writes generated output itself.

web/vite.config.ts

@@ -33,6 +33,9 @@ export default defineConfig({
   },
   server: {
     port: 3000,
+    watch: {
+      ignored: ["**/.svelte-kit/generated/**"],
+    },
     proxy: {
       "/api": {
         target: "http://localhost:8080",