feat(web): add three search overflow pages

/search/artists, /search/albums, /search/tracks each read ?q= and run
their own createSearchInfiniteQuery (limit=50). Load more pulls the
next offset; back link returns to /search?q=. Empty q shows a 'no
query' prompt and fires no request. Tracks overflow uses the onPlay
prop on TrackRow to call playRadio(track.id).

web/src/routes/search/albums/+page.svelte

@@ -0,0 +1,54 @@
+<script lang="ts">
+  import { page } from '$app/state';
+  import { createSearchAlbumsInfiniteQuery } from '$lib/api/queries';
+  import AlbumCard from '$lib/components/AlbumCard.svelte';
+  import LibrarySkeleton from '$lib/components/LibrarySkeleton.svelte';
+  import ApiErrorBanner from '$lib/components/ApiErrorBanner.svelte';
+  import { useDelayed } from '$lib/utils/useDelayed.svelte';
+
+  const q = $derived((page.url.searchParams.get('q') ?? '').trim());
+  const queryStore = $derived(q ? createSearchAlbumsInfiniteQuery(q) : null);
+  const query = $derived(queryStore ? $queryStore : null);
+
+  const albums = $derived(query?.data?.pages?.flatMap((p) => p.items) ?? []);
+  const total = $derived(query?.data?.pages?.[0]?.total ?? 0);
+  const showSkeleton = useDelayed(() => !!query?.isPending);
+</script>
+
+<div class="space-y-4">
+  <header>
+    <a href={`/search?q=${encodeURIComponent(q)}`} class="text-sm text-text-secondary hover:text-text-primary">
+      ← Back to search
+    </a>
+    <h1 class="mt-2 text-2xl font-semibold">Albums matching '{q}'</h1>
+    {#if !query?.isPending && !query?.isError && q}
+      <p class="text-sm text-text-secondary">{total} {total === 1 ? 'album' : 'albums'}</p>
+    {/if}
+  </header>
+
+  {#if !q}
+    <p class="text-text-secondary">No query — return to search to start typing.</p>
+  {:else if query?.isError}
+    <ApiErrorBanner error={query.error} onRetry={query.refetch} />
+  {:else if showSkeleton.value && albums.length === 0}
+    <LibrarySkeleton variant="grid" count={12} />
+  {:else if total === 0}
+    <p class="text-text-secondary">No album matches.</p>
+  {:else}
+    <div class="grid grid-cols-2 gap-4 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5">
+      {#each albums as a (a.id)}
+        <AlbumCard album={a} />
+      {/each}
+    </div>
+    {#if query?.hasNextPage}
+      <button
+        type="button"
+        class="w-full rounded bg-surface py-2 text-sm hover:bg-surface-hover disabled:opacity-60"
+        disabled={query.isFetchingNextPage}
+        onclick={() => query.fetchNextPage()}
+      >
+        {query.isFetchingNextPage ? 'Loading…' : 'Load more'}
+      </button>
+    {/if}
+  {/if}
+</div>

web/src/routes/search/albums/albums.test.ts

@@ -0,0 +1,68 @@
+import { afterEach, describe, expect, test, vi } from 'vitest';
+import { render, screen, fireEvent } from '@testing-library/svelte';
+import { mockInfiniteQuery } from '../../../test-utils/query';
+import type { AlbumRef, Page } from '$lib/api/types';
+
+const state = vi.hoisted(() => ({ pageUrl: new URL('http://localhost/search/albums?q=miles') }));
+
+vi.mock('$app/state', () => ({
+  page: { get url() { return state.pageUrl; } }
+}));
+
+vi.mock('$lib/api/queries', () => ({
+  createSearchAlbumsInfiniteQuery: vi.fn()
+}));
+
+vi.mock('$lib/api/client', () => ({
+  api: { get: vi.fn() }
+}));
+vi.mock('$lib/player/store.svelte', () => ({
+  enqueueTracks: vi.fn()
+}));
+
+import AlbumsOverflow from './+page.svelte';
+import { createSearchAlbumsInfiniteQuery } from '$lib/api/queries';
+
+function page<T>(items: T[], total: number, offset = 0, limit = 50): Page<T> {
+  return { items, total, offset, limit };
+}
+
+const album: AlbumRef = {
+  id: 'al1', title: 'Kind of Blue', artist_id: 'a1', artist_name: 'Miles Davis',
+  year: 1959, track_count: 5, duration_sec: 2630, cover_url: '/api/albums/al1/cover'
+};
+
+afterEach(() => {
+  vi.clearAllMocks();
+  state.pageUrl = new URL('http://localhost/search/albums?q=miles');
+});
+
+describe('search albums overflow', () => {
+  test('renders an AlbumCard per album', () => {
+    (createSearchAlbumsInfiniteQuery as ReturnType<typeof vi.fn>).mockReturnValue(
+      mockInfiniteQuery({ pages: [page([album], 1)] })
+    );
+    render(AlbumsOverflow);
+    expect(screen.getByRole('link', { name: /Kind of Blue/ })).toHaveAttribute('href', '/albums/al1');
+  });
+
+  test('Load more calls fetchNextPage', async () => {
+    const fetchNextPage = vi.fn();
+    (createSearchAlbumsInfiniteQuery as ReturnType<typeof vi.fn>).mockReturnValue(
+      mockInfiniteQuery({
+        pages: [page<AlbumRef>([], 100)],
+        hasNextPage: true,
+        fetchNextPage
+      })
+    );
+    render(AlbumsOverflow);
+    await fireEvent.click(screen.getByRole('button', { name: /load more/i }));
+    expect(fetchNextPage).toHaveBeenCalledTimes(1);
+  });
+
+  test('empty q shows a prompt', () => {
+    state.pageUrl = new URL('http://localhost/search/albums');
+    render(AlbumsOverflow);
+    expect(screen.getByText(/no query/i)).toBeInTheDocument();
+  });
+});

web/src/routes/search/artists/+page.svelte

@@ -0,0 +1,54 @@
+<script lang="ts">
+  import { page } from '$app/state';
+  import { createSearchArtistsInfiniteQuery } from '$lib/api/queries';
+  import ArtistRow from '$lib/components/ArtistRow.svelte';
+  import LibrarySkeleton from '$lib/components/LibrarySkeleton.svelte';
+  import ApiErrorBanner from '$lib/components/ApiErrorBanner.svelte';
+  import { useDelayed } from '$lib/utils/useDelayed.svelte';
+
+  const q = $derived((page.url.searchParams.get('q') ?? '').trim());
+  const queryStore = $derived(q ? createSearchArtistsInfiniteQuery(q) : null);
+  const query = $derived(queryStore ? $queryStore : null);
+
+  const artists = $derived(query?.data?.pages?.flatMap((p) => p.items) ?? []);
+  const total = $derived(query?.data?.pages?.[0]?.total ?? 0);
+  const showSkeleton = useDelayed(() => !!query?.isPending);
+</script>
+
+<div class="space-y-4">
+  <header>
+    <a href={`/search?q=${encodeURIComponent(q)}`} class="text-sm text-text-secondary hover:text-text-primary">
+      ← Back to search
+    </a>
+    <h1 class="mt-2 text-2xl font-semibold">Artists matching '{q}'</h1>
+    {#if !query?.isPending && !query?.isError && q}
+      <p class="text-sm text-text-secondary">{total} {total === 1 ? 'artist' : 'artists'}</p>
+    {/if}
+  </header>
+
+  {#if !q}
+    <p class="text-text-secondary">No query — return to search to start typing.</p>
+  {:else if query?.isError}
+    <ApiErrorBanner error={query.error} onRetry={query.refetch} />
+  {:else if showSkeleton.value && artists.length === 0}
+    <LibrarySkeleton variant="list" count={12} />
+  {:else if total === 0}
+    <p class="text-text-secondary">No artist matches.</p>
+  {:else}
+    <div>
+      {#each artists as a (a.id)}
+        <ArtistRow artist={a} />
+      {/each}
+    </div>
+    {#if query?.hasNextPage}
+      <button
+        type="button"
+        class="w-full rounded bg-surface py-2 text-sm hover:bg-surface-hover disabled:opacity-60"
+        disabled={query.isFetchingNextPage}
+        onclick={() => query.fetchNextPage()}
+      >
+        {query.isFetchingNextPage ? 'Loading…' : 'Load more'}
+      </button>
+    {/if}
+  {/if}
+</div>

web/src/routes/search/artists/artists.test.ts

@@ -0,0 +1,68 @@
+import { afterEach, describe, expect, test, vi } from 'vitest';
+import { render, screen, fireEvent } from '@testing-library/svelte';
+import { mockInfiniteQuery } from '../../../test-utils/query';
+import type { ArtistRef, Page } from '$lib/api/types';
+
+const state = vi.hoisted(() => ({ pageUrl: new URL('http://localhost/search/artists?q=miles') }));
+
+vi.mock('$app/state', () => ({
+  page: { get url() { return state.pageUrl; } }
+}));
+
+vi.mock('$lib/api/queries', () => ({
+  createSearchArtistsInfiniteQuery: vi.fn()
+}));
+
+import ArtistsOverflow from './+page.svelte';
+import { createSearchArtistsInfiniteQuery } from '$lib/api/queries';
+
+function page<T>(items: T[], total: number, offset = 0, limit = 50): Page<T> {
+  return { items, total, offset, limit };
+}
+
+afterEach(() => {
+  vi.clearAllMocks();
+  state.pageUrl = new URL('http://localhost/search/artists?q=miles');
+});
+
+describe('search artists overflow', () => {
+  test('renders a row per artist', () => {
+    const a1: ArtistRef = { id: 'a1', name: 'Miles Davis',  album_count: 12 };
+    const a2: ArtistRef = { id: 'a2', name: 'Miles Mosley', album_count: 1 };
+    (createSearchArtistsInfiniteQuery as ReturnType<typeof vi.fn>).mockReturnValue(
+      mockInfiniteQuery({ pages: [page([a1, a2], 2)] })
+    );
+    render(ArtistsOverflow);
+    expect(screen.getByRole('link', { name: /Miles Davis/ })).toBeInTheDocument();
+    expect(screen.getByRole('link', { name: /Miles Mosley/ })).toBeInTheDocument();
+  });
+
+  test('Load more calls fetchNextPage when hasNextPage', async () => {
+    const fetchNextPage = vi.fn();
+    (createSearchArtistsInfiniteQuery as ReturnType<typeof vi.fn>).mockReturnValue(
+      mockInfiniteQuery({
+        pages: [page<ArtistRef>([], 100)],
+        hasNextPage: true,
+        fetchNextPage
+      })
+    );
+    render(ArtistsOverflow);
+    await fireEvent.click(screen.getByRole('button', { name: /load more/i }));
+    expect(fetchNextPage).toHaveBeenCalledTimes(1);
+  });
+
+  test('Load more is hidden when hasNextPage is false', () => {
+    (createSearchArtistsInfiniteQuery as ReturnType<typeof vi.fn>).mockReturnValue(
+      mockInfiniteQuery({ pages: [page<ArtistRef>([{ id: 'a', name: 'A', album_count: 1 }], 1)] })
+    );
+    render(ArtistsOverflow);
+    expect(screen.queryByRole('button', { name: /load more/i })).not.toBeInTheDocument();
+  });
+
+  test('empty q shows a prompt and fires no query', () => {
+    state.pageUrl = new URL('http://localhost/search/artists');
+    render(ArtistsOverflow);
+    expect(screen.getByText(/no query/i)).toBeInTheDocument();
+    expect(createSearchArtistsInfiniteQuery).not.toHaveBeenCalled();
+  });
+});

web/src/routes/search/tracks/+page.svelte

@@ -0,0 +1,60 @@
+<script lang="ts">
+  import { page } from '$app/state';
+  import { createSearchTracksInfiniteQuery } from '$lib/api/queries';
+  import TrackRow from '$lib/components/TrackRow.svelte';
+  import LibrarySkeleton from '$lib/components/LibrarySkeleton.svelte';
+  import ApiErrorBanner from '$lib/components/ApiErrorBanner.svelte';
+  import { useDelayed } from '$lib/utils/useDelayed.svelte';
+  import { playRadio } from '$lib/player/store.svelte';
+  import type { TrackRef } from '$lib/api/types';
+
+  const q = $derived((page.url.searchParams.get('q') ?? '').trim());
+  const queryStore = $derived(q ? createSearchTracksInfiniteQuery(q) : null);
+  const query = $derived(queryStore ? $queryStore : null);
+
+  const tracks = $derived(query?.data?.pages?.flatMap((p) => p.items) ?? []);
+  const total = $derived(query?.data?.pages?.[0]?.total ?? 0);
+  const showSkeleton = useDelayed(() => !!query?.isPending);
+
+  function onTrackPlay(_tracks: TrackRef[], index: number) {
+    playRadio(_tracks[index].id);
+  }
+</script>
+
+<div class="space-y-4">
+  <header>
+    <a href={`/search?q=${encodeURIComponent(q)}`} class="text-sm text-text-secondary hover:text-text-primary">
+      ← Back to search
+    </a>
+    <h1 class="mt-2 text-2xl font-semibold">Tracks matching '{q}'</h1>
+    {#if !query?.isPending && !query?.isError && q}
+      <p class="text-sm text-text-secondary">{total} {total === 1 ? 'track' : 'tracks'}</p>
+    {/if}
+  </header>
+
+  {#if !q}
+    <p class="text-text-secondary">No query — return to search to start typing.</p>
+  {:else if query?.isError}
+    <ApiErrorBanner error={query.error} onRetry={query.refetch} />
+  {:else if showSkeleton.value && tracks.length === 0}
+    <LibrarySkeleton variant="list" count={12} />
+  {:else if total === 0}
+    <p class="text-text-secondary">No track matches.</p>
+  {:else}
+    <div class="overflow-hidden rounded border border-border">
+      {#each tracks as t, i (t.id)}
+        <TrackRow tracks={tracks} index={i} onPlay={onTrackPlay} />
+      {/each}
+    </div>
+    {#if query?.hasNextPage}
+      <button
+        type="button"
+        class="w-full rounded bg-surface py-2 text-sm hover:bg-surface-hover disabled:opacity-60"
+        disabled={query.isFetchingNextPage}
+        onclick={() => query.fetchNextPage()}
+      >
+        {query.isFetchingNextPage ? 'Loading…' : 'Load more'}
+      </button>
+    {/if}
+  {/if}
+</div>

web/src/routes/search/tracks/tracks.test.ts

@@ -0,0 +1,80 @@
+import { afterEach, describe, expect, test, vi } from 'vitest';
+import { render, screen, fireEvent } from '@testing-library/svelte';
+import { mockInfiniteQuery } from '../../../test-utils/query';
+import type { TrackRef, Page } from '$lib/api/types';
+
+const state = vi.hoisted(() => ({ pageUrl: new URL('http://localhost/search/tracks?q=miles') }));
+
+vi.mock('$app/state', () => ({
+  page: { get url() { return state.pageUrl; } }
+}));
+
+vi.mock('$lib/api/queries', () => ({
+  createSearchTracksInfiniteQuery: vi.fn()
+}));
+
+vi.mock('$lib/player/store.svelte', () => ({
+  playQueue: vi.fn(),
+  playRadio: vi.fn(),
+  enqueueTrack: vi.fn()
+}));
+
+import TracksOverflow from './+page.svelte';
+import { createSearchTracksInfiniteQuery } from '$lib/api/queries';
+import { playRadio } from '$lib/player/store.svelte';
+
+function page<T>(items: T[], total: number, offset = 0, limit = 50): Page<T> {
+  return { items, total, offset, limit };
+}
+
+const track: TrackRef = {
+  id: 't1', title: 'So What',
+  album_id: 'al1', album_title: 'Kind of Blue',
+  artist_id: 'a1', artist_name: 'Miles Davis',
+  track_number: 1, disc_number: 1, duration_sec: 545,
+  stream_url: '/api/tracks/t1/stream'
+};
+
+afterEach(() => {
+  vi.clearAllMocks();
+  state.pageUrl = new URL('http://localhost/search/tracks?q=miles');
+});
+
+describe('search tracks overflow', () => {
+  test('renders a TrackRow per track', () => {
+    (createSearchTracksInfiniteQuery as ReturnType<typeof vi.fn>).mockReturnValue(
+      mockInfiniteQuery({ pages: [page([track], 1)] })
+    );
+    render(TracksOverflow);
+    expect(screen.getByRole('button', { name: /So What/ })).toBeInTheDocument();
+  });
+
+  test('clicking a track row triggers playRadio with the track id', async () => {
+    (createSearchTracksInfiniteQuery as ReturnType<typeof vi.fn>).mockReturnValue(
+      mockInfiniteQuery({ pages: [page([track], 1)] })
+    );
+    render(TracksOverflow);
+    await fireEvent.click(screen.getByRole('button', { name: /So What/ }));
+    expect(playRadio).toHaveBeenCalledWith('t1');
+  });
+
+  test('Load more calls fetchNextPage', async () => {
+    const fetchNextPage = vi.fn();
+    (createSearchTracksInfiniteQuery as ReturnType<typeof vi.fn>).mockReturnValue(
+      mockInfiniteQuery({
+        pages: [page<TrackRef>([], 100)],
+        hasNextPage: true,
+        fetchNextPage
+      })
+    );
+    render(TracksOverflow);
+    await fireEvent.click(screen.getByRole('button', { name: /load more/i }));
+    expect(fetchNextPage).toHaveBeenCalledTimes(1);
+  });
+
+  test('empty q shows a prompt', () => {
+    state.pageUrl = new URL('http://localhost/search/tracks');
+    render(TracksOverflow);
+    expect(screen.getByText(/no query/i)).toBeInTheDocument();
+  });
+});