Update web dependencies

Bulk-bump the web app's npm dependencies: eslint 9->10, vite 6->8,
@eslint/compat 1->2, @sveltejs/adapter-auto 6->7, svelte-adapter-bun 0.5->1.0,
@eslint/js 9->10, globals 16->17, @sveltejs/vite-plugin-svelte 6->7,
@tailwindcss/vite 4.1->4.3, prettier-plugin-svelte 3->4, plus minor bumps
for svelte 5.33->5.56, kit 2.21->2.70, tailwindcss 4.1->4.3, bits-ui,
runed, svelte-toolbelt, luxon and tooling.

The eslint-plugin-svelte 3.9->3.22 bump activates the recommended
svelte/no-navigation-without-resolve rule, so wrap the goto() paths in
+page.svelte and login/+page.svelte with resolve() from $app/paths.
No base path is configured, so this is behavior-neutral.

Verified: bun run check, bun run lint, bun run build all pass.

Author: jpenilla