feat: a held album below the quality you settle for, or holding a video rip, stays wanted for a better copy, and the import replaces the old tracks with their likes and plays carried over (M502 #5524)

- acquisition_settings.upgrade_until (default High quality lossy, Lidarr's
  cutoff, note #5527; "" is off), an "Upgrade until" row under Searching.
- The wanted worker judges held albums hourly: tier per format from size per
  second (the scanner records no bitrate), the album's worst. Below the
  cutoff it is wanted for quality; a video rip among its tracks always.
- The schedule searches upgrades weekly, after open wants; a release no
  better than the copy held is refused ("not_better").
- The import matches each file to the track it would replace (recording,
  then disc/track) and replaces it when it is a rip or the file is a better
  tier: over the same path in one rename, or filed beside it and the old
  track folded in (library.ReplaceTrack: file first, then foldTrackInto).
  Nothing better: the release is set aside.
- Collection › Upgrades (Lidarr's Cutoff Unmet); Suspect sources says when a
  clean copy was looked for instead of Lidarr's search.

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

web/src/routes/collection/collection.test.ts

@@ -12,7 +12,7 @@ vi.mock('#lib/api/wanted.js', () => ({ createWantArtistsQuery: vi.fn() }));
 import WantedLayout from './+layout.svelte';
 import { createWantArtistsQuery } from '#lib/api/wanted.js';
 
-const counts: WantCounts = { artists: 7, wanted: 5, missing: 1, held: 9, following: 2, activity: 3, attention: 0, blocked: 4, unmatched: 3 };
+const counts: WantCounts = { artists: 7, wanted: 5, missing: 1, held: 9, upgrades: 6, following: 2, activity: 3, attention: 0, blocked: 4, unmatched: 3 };
 const children = createRawSnippet(() => ({ render: () => `<p data-testid="tab-body">body</p>` }));
 
 afterEach(() => vi.clearAllMocks());
@@ -43,6 +43,7 @@ describe('/collection layout', () => {
       ['/collection', 'Catalogue 7'],
       ['/collection/wanted', 'Wanted 5'],
       ['/collection/missing', 'Missing files 1'],
+      ['/collection/upgrades', 'Upgrades 6'],
       ['/collection/activity', 'Activity 3'],
       ['/collection/following', 'Following 2'],
       ['/collection/blocked', 'Blocked 4'],

web/src/routes/collection/upgrades/+page.svelte

@@ -0,0 +1,8 @@
+<script lang="ts">
+  import { pageTitle } from '#lib/branding.js';
+  import WantList from '#lib/components/wanted/WantList.svelte';
+</script>
+
+<svelte:head><title>{pageTitle('Collection · Upgrades')}</title></svelte:head>
+
+<WantList list="upgrade" />