feat: a wanted list — follow artists on release-type profiles; requests and re-acquisition become wants (M502 #5520)

Minstrel keeps its own list of what it is to get, keyed by MusicBrainz
release group. A want comes from an approved request, a new release by a
followed artist, or an album whose files went missing, and is held once the
library has a full edition of it.

- Migration 0081: release_type_profiles (Standard seeded: Album, EP,
  Single, studio only), follows, follow_seen_groups and wants.
  lidarr_requests becomes requests with plain *_mbid columns; approved
  album and track requests move onto the wanted list, approved artist
  requests become follows, and the library's album artists start out
  followed. missing_reacquisitions and the retry settings go.
- internal/wanted: follows are checked against MusicBrainz discographies
  daily. The first check sets a baseline, and only releases after it are
  wanted unless the follow asked for what already exists. Profiles filter
  by primary and secondary type, so live recordings stay out unless a
  profile ticks Live.
- internal/requests (was lidarrrequests): approving puts the request on
  the wanted list, and an artist request can be approved on a chosen
  profile. A request completes when its want is held.
- The re-acquisition sweeper wants a missing album back instead of asking
  Lidarr; searching for it is the search schedule's (#5521).
- Web: an admin Wanted page (Wanted, Missing files, Held, Following), a
  follow control on artist pages, a release-type profiles card on
  Integrations, "Approve on a profile" on Requests, and want state on
  Missing files. The artist detail API returns the artist's MBID.
- Android: the request body sends artist_mbid, album_mbid and track_mbid.

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

web/src/lib/components/ReacquisitionSettingsCard.svelte

@@ -9,10 +9,11 @@
   import { errMessage } from '#lib/api/errors.js';
   import { pushToast } from '#lib/stores/toast.svelte.js';
 
-  // Policy for turning a missing file back into a Lidarr request
-  // (milestone #290). Lives on the missing-files page rather than under
-  // Integrations because this is where the operator meets the problem it
-  // solves; Lidarr is the mechanism, not the subject.
+  // Policy for putting an album whose files went missing back on the wanted
+  // list (milestone #290, M502 #5520). Lives on the missing-files page rather
+  // than under Integrations because this is where the operator meets the
+  // problem it solves. Searching for a want, and retrying, is the search
+  // schedule's job, so there is no retry policy here.
 
   let saved = $state<ReacquisitionSettings | null>(null);
   let form = $state<ReacquisitionSettings | null>(null);
@@ -31,11 +32,7 @@
     return {
       enabled: s.enabled,
       grace_hours: s.grace_hours,
-      backoff_base_hours: s.backoff_base_hours,
-      backoff_max_hours: s.backoff_max_hours,
-      max_attempts: s.max_attempts,
-      max_per_pass: s.max_per_pass,
-      auto_approve: s.auto_approve
+      max_per_pass: s.max_per_pass
     };
   }
 
@@ -70,28 +67,16 @@
     }
   }
 
-  // Plain-language echo of what the numbers add up to. The individual fields
-  // are meaningless on their own — "6 hours" says nothing until you know it
-  // doubles — so the card states the resulting schedule.
-  const schedule = $derived.by(() => {
-    if (!form) return '';
-    const steps: string[] = [];
-    let hours = form.backoff_base_hours;
-    for (let i = 0; i < form.max_attempts; i++) {
-      steps.push(`${hours}h`);
-      hours = Math.min(hours * 2, form.backoff_max_hours);
-    }
-    return steps.join(' → ');
-  });
 </script>
 
 <section class="space-y-4 rounded-xl border border-border bg-surface p-5">
   <div>
     <h3 class="font-display text-lg font-medium text-text-primary">Automatic re-acquisition</h3>
     <p class="mt-1 text-sm text-text-secondary">
-      When a file has been missing for a while, Minstrel can ask Lidarr for the album
-      again by itself. Requests are made per album, not per track — a whole folder
-      going missing is one request, not forty.
+      When a file has been missing for a while, Minstrel can put its album back on the
+      <a href="/admin/wanted?tab=missing" class="text-accent-fg hover:underline">wanted list</a>
+      by itself. It's wanted per album, not per track: a whole folder going missing is one
+      want, not forty.
     </p>
   </div>
 
@@ -106,7 +91,7 @@
     <label class="flex items-start gap-3">
       <input type="checkbox" bind:checked={form.enabled} class="mt-1" />
       <span>
-        <span class="text-sm text-text-primary">Ask Lidarr for missing albums automatically</span>
+        <span class="text-sm text-text-primary">Want missing albums back automatically</span>
         <span class="block text-xs text-text-secondary">
           Off leaves missing files listed here and does nothing about them.
         </span>
@@ -115,11 +100,11 @@
 
     <div class="grid gap-4 sm:grid-cols-2">
       <label class="block">
-        <span class="text-sm text-text-primary">Wait before the first attempt</span>
+        <span class="text-sm text-text-primary">Wait before wanting it back</span>
         <span class="block text-xs text-text-secondary">
-          Hours a file must be missing before anything is requested. A drive that
+          Hours a file must be missing before its album is wanted. A drive that
           didn't mount, or a container that started before its media, resolves
-          itself well inside a day — this is what stops those becoming requests.
+          itself well inside a day; this is what stops those becoming wants.
         </span>
         <input
           type="number"
@@ -132,53 +117,10 @@
         />
       </label>
 
-      <label class="block">
-        <span class="text-sm text-text-primary">Attempts before giving up</span>
-        <span class="block text-xs text-text-secondary">
-          After this many tries the album is left alone. It's picked up again if the
-          file comes back and goes missing later.
-        </span>
-        <input
-          type="number"
-          min="1"
-          max="10"
-          bind:value={form.max_attempts}
-          class="mt-1 w-28 rounded border border-border bg-background px-2 py-1 text-sm
-                 text-text-primary focus-visible:outline-solid focus-visible:outline-2
-                 focus-visible:outline-accent"
-        />
-      </label>
-
-      <label class="block">
-        <span class="text-sm text-text-primary">First retry gap (hours)</span>
-        <input
-          type="number"
-          min="1"
-          max="168"
-          bind:value={form.backoff_base_hours}
-          class="mt-1 w-28 rounded border border-border bg-background px-2 py-1 text-sm
-                 text-text-primary focus-visible:outline-solid focus-visible:outline-2
-                 focus-visible:outline-accent"
-        />
-      </label>
-
-      <label class="block">
-        <span class="text-sm text-text-primary">Longest gap (hours)</span>
-        <input
-          type="number"
-          min="1"
-          max="720"
-          bind:value={form.backoff_max_hours}
-          class="mt-1 w-28 rounded border border-border bg-background px-2 py-1 text-sm
-                 text-text-primary focus-visible:outline-solid focus-visible:outline-2
-                 focus-visible:outline-accent"
-        />
-      </label>
-
       <label class="block">
         <span class="text-sm text-text-primary">Albums per sweep</span>
         <span class="block text-xs text-text-secondary">
-          Ceiling on requests made each hour, so a large loss trickles.
+          Ceiling on albums wanted each hour, so a large loss trickles.
         </span>
         <input
           type="number"
@@ -192,33 +134,17 @@
       </label>
     </div>
 
-    <p class="rounded-md bg-surface-hover px-3 py-2 text-xs text-text-secondary">
-      Retry schedule: <span class="font-mono text-text-primary">{schedule}</span> after the
-      first attempt.
-    </p>
-
-    <label class="flex items-start gap-3">
-      <input type="checkbox" bind:checked={form.auto_approve} class="mt-1" />
-      <span>
-        <span class="text-sm text-text-primary">Send requests to Lidarr without approval</span>
-        <span class="block text-xs text-text-secondary">
-          Off means requests appear in the Requests queue for you to approve, and
-          nothing is downloaded until you do.
-        </span>
-      </span>
-    </label>
-
     {#if saved && saved.unnameable_albums > 0}
       <!-- Stated rather than left to be inferred: without this, an operator
-           watching those rows never get a request would reasonably conclude
+           watching those rows never get wanted would reasonably conclude
            the feature is broken. -->
       <p class="flex items-start gap-2 rounded-md bg-surface-hover px-3 py-2 text-xs text-text-secondary">
         <TriangleAlert size={14} class="mt-0.5 shrink-0 text-action-destructive" aria-hidden="true" />
         <span>
           {saved.unnameable_albums}
           {saved.unnameable_albums === 1 ? 'album has' : 'albums have'} missing files but no
-          MusicBrainz ID, so {saved.unnameable_albums === 1 ? 'it' : 'they'} can't be requested —
-          Lidarr has no way to identify the release. A re-scan after tagging fixes it.
+          MusicBrainz ID, so {saved.unnameable_albums === 1 ? 'it' : 'they'} can't be wanted:
+          there's no way to identify the release. A re-scan after tagging fixes it.
         </span>
       </p>
     {/if}