feat(notifications): requests and flags reach the people who act on them (#5340)

- A new request still pending after any auto-approval notifies the
  admins (request_pending), but not the requester if they are an admin.
  A request that dedups into one already in flight is not announced again.
- Approving or rejecting a request notifies the requester, and a
  rejection carries the admin's notes as the reason. An admin deciding
  their own request gets nothing.
- The reconciler notifies the requester when their request arrives
  (request_completed), linking the matched album or artist.
- A request the re-acquisition sweeper files and cannot approve itself
  notifies the admins.
- A quarantine flag notifies every admin except the flagger, naming the
  track, the flagger and the reason.

lidarrrequests.Service.CreateTracked reports whether a request was
inserted or deduped; Create wraps it.

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

internal/lidarrrequests/reconciler.go

@@ -15,6 +15,7 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/eventbus"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarr"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrconfig"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/notifications"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/tags"
 )
 
@@ -30,6 +31,7 @@ type Reconciler struct {
 	clientFn  func() *lidarr.Client
 	logger    *slog.Logger
 	bus       *eventbus.Bus
+	notifier  *notifications.Notifier // nil: no inbox notifications
 	tick      time.Duration
 	batch     int32
 	// releaseGroup names the MusicBrainz release group of a release id, to
@@ -61,9 +63,26 @@ func NewReconciler(pool *pgxpool.Pool, cfg *lidarrconfig.Service, clientFn func(
 	}
 }
 
-// publishCompleted broadcasts a request.status_changed event scoped to
-// the original requester. No-op when bus is nil.
-func (r *Reconciler) publishCompleted(row dbq.LidarrRequest) {
+// SetNotifier makes completions land in the requester's notifications inbox
+// (M489). Without one, completions are only broadcast on the bus.
+func (r *Reconciler) SetNotifier(n *notifications.Notifier) { r.notifier = n }
+
+// publishCompleted tells the requester their request arrived: a
+// request.status_changed event for open screens, and a notification that
+// outlives the connection.
+func (r *Reconciler) publishCompleted(ctx context.Context, row dbq.LidarrRequest) {
+	p := notifications.Payload{
+		RequestID:   formatUUIDForBus(row.ID),
+		RequestKind: string(row.Kind),
+		Name:        DisplayName(row),
+	}
+	if row.MatchedAlbumID.Valid {
+		p.AlbumID = formatUUIDForBus(row.MatchedAlbumID)
+	} else if row.MatchedArtistID.Valid {
+		p.ArtistID = formatUUIDForBus(row.MatchedArtistID)
+	}
+	r.notifier.NotifyLogged(ctx, notifications.KindRequestCompleted, notifications.ToUser(row.UserID), p.Map())
+
 	if r.bus == nil {
 		return
 	}
@@ -308,7 +327,7 @@ func (r *Reconciler) reconcileArtist(ctx context.Context, q *dbq.Queries, row db
 	if err != nil {
 		return err
 	}
-	r.publishCompleted(completed)
+	r.publishCompleted(ctx, completed)
 	return nil
 }
 
@@ -333,7 +352,7 @@ func (r *Reconciler) reconcileAlbum(ctx context.Context, q *dbq.Queries, row dbq
 	if err != nil {
 		return err
 	}
-	r.publishCompleted(completed)
+	r.publishCompleted(ctx, completed)
 	return nil
 }
 
@@ -374,7 +393,7 @@ func (r *Reconciler) reconcileTrack(ctx context.Context, q *dbq.Queries, row dbq
 	if err != nil {
 		return err
 	}
-	r.publishCompleted(completed)
+	r.publishCompleted(ctx, completed)
 	return nil
 }