chore(deps): SvelteKit 3 with adapter-static 4 and TypeScript 6, full-tree npm audit (#5021)

Merges Renovate's kit 3 (PR #149) and adapter-static 4 (PR #148) bumps,
plus the migration they need. The mechanical part is `sv migrate
sveltekit-3`, run one task at a time and reviewed:

- svelte.config.js is gone. Its options move into sveltekit() in
  vite.config.ts, exported as kitOptions so vitest.config.ts runs the
  same kit setup, including the $test-utils alias the tests import.
- $lib becomes #lib through package.json "imports". There is no
  src/lib/index, so only the "#lib/*" entry is kept.
- tsconfig extends $app/tsconfig.
- Peer floors raised to kit 3's requirements: svelte ^5.57.1, vite
  ^8.0.12, svelte-check ^4.7.5.

By hand, from the codemod's list of non-automated tasks:

- goto's replaceState option is now replace; keepFocus becomes
  reset: false. For the search typeahead, reset: false also stops the
  scroll-to-top, which is wanted while typing.
- The test setup mocks drop pushState/replaceState and $app/paths
  base/assets, which kit 3 removed, and mock refreshAll in place of
  invalidateAll.
- The other flagged files only read page.url or goto internal routes,
  so they needed no change.

TypeScript goes to ^6, not the ^7 Renovate offers: kit 3 declares
typescript ^6 as a peer and svelte-check 4.7 accepts ^5 || ^6. Move to
7 once both accept it.

With Tailwind 4 and kit 3 in, `npm audit` on the whole tree reports 0,
so the web lane now audits every dependency rather than only what
ships to browsers.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/routes/library/liked/liked.test.ts

@@ -2,11 +2,11 @@ import { afterEach, describe, expect, test, vi } from 'vitest';
 import { render, screen, fireEvent } from '@testing-library/svelte';
 import { mockInfiniteQuery } from '../../../test-utils/query';
 import { apiClientMock } from '../../../test-utils/mocks/client';
-import type { ArtistRef, AlbumRef, TrackRef, Page } from '$lib/api/types';
+import type { ArtistRef, AlbumRef, TrackRef, Page } from '#lib/api/types.js';
 import { readable } from 'svelte/store';
 import { makeTrack } from '$test-utils/fixtures/track';
 
-vi.mock('$lib/api/likes', () => ({
+vi.mock('#lib/api/likes.js', () => ({
   createLikedIdsQuery: () => readable({
     data: { track_ids: [], album_ids: [], artist_ids: [] },
     isPending: false,
@@ -19,8 +19,8 @@ vi.mock('$lib/api/likes', () => ({
   unlikeEntity: vi.fn()
 }));
 
-vi.mock('$lib/api/client', () => apiClientMock());
-vi.mock('$lib/player/store.svelte', () => ({
+vi.mock('#lib/api/client.js', () => apiClientMock());
+vi.mock('#lib/player/store.svelte.js', () => ({
   playQueue: vi.fn(), enqueueTrack: vi.fn(), enqueueTracks: vi.fn(),
   player: { current: undefined }
 }));
@@ -30,7 +30,7 @@ import {
   createLikedTracksInfiniteQuery,
   createLikedAlbumsInfiniteQuery,
   createLikedArtistsInfiniteQuery
-} from '$lib/api/likes';
+} from '#lib/api/likes.js';
 
 function page<T>(items: T[], total: number, offset = 0, limit = 50): Page<T> {
   return { items, total, offset, limit };