feat(backend): remove browse-page cache, add Sentry/GlitchTip, rename MinIO buckets

- Remove BrowseStore interface + all browse MinIO ops (PutBrowsePage, GetBrowsePage,
  BrowseObjectKey, putBrowse, getBrowse); the /api/browse endpoint was replaced by
  the Meilisearch-backed /api/catalogue route
- Remove browse_refresh.go and the 6h browse refresh ticker in runner
- Add Sentry/GlitchTip error tracking to both backend and runner binaries via
  github.com/getsentry/sentry-go; opt-in via GLITCHTIP_DSN env var
- Wrap http.ServeMux with sentryhttp middleware for automatic panic recovery
- Rename MinIO bucket defaults: libnovel-chapters→chapters, libnovel-audio→audio,
  libnovel-browse→catalogue (env vars still override)
- Remove staged compiled binaries (backend/bin/runner, backend/healthcheck)

v3/backend/internal/storage/minio.go

@@ -119,12 +119,6 @@ func AvatarObjectKey(userID, ext string) string {
 	return fmt.Sprintf("%s/%s.%s", userID, ext, ext)
 }
 
-// BrowseObjectKey returns the MinIO object key for a cached browse page snapshot.
-// Format: browse/{genre}/{sort}/{status}/{type}/page-{n}.json
-func BrowseObjectKey(genre, sort, status, novelType string, page int) string {
-	return fmt.Sprintf("browse/%s/%s/%s/%s/page-%d.json", genre, sort, status, novelType, page)
-}
-
 // CoverObjectKey returns the MinIO object key for a book cover image.
 // Format: covers/{slug}.jpg
 func CoverObjectKey(slug string) string {
@@ -207,26 +201,6 @@ func (m *minioClient) listObjectKeys(ctx context.Context, bucket, prefix string)
 	return keys, nil
 }
 
-// ── Browse operations ─────────────────────────────────────────────────────────
-
-// putBrowse stores raw JSON bytes for a browse page snapshot.
-func (m *minioClient) putBrowse(ctx context.Context, key string, data []byte) error {
-	return m.putObject(ctx, m.bucketBrowse, key, "application/json", data)
-}
-
-// getBrowse retrieves a browse page snapshot. Returns (nil, false, nil) when
-// the object does not exist.
-func (m *minioClient) getBrowse(ctx context.Context, key string) ([]byte, bool, error) {
-	if !m.objectExists(ctx, m.bucketBrowse, key) {
-		return nil, false, nil
-	}
-	data, err := m.getObject(ctx, m.bucketBrowse, key)
-	if err != nil {
-		return nil, false, err
-	}
-	return data, true, nil
-}
-
 // ── Cover operations ──────────────────────────────────────────────────────────
 
 // putCover stores a raw cover image in the browse bucket under covers/{slug}.jpg.

v3/backend/internal/storage/store.go

@@ -50,7 +50,6 @@ var _ bookstore.RankingStore = (*Store)(nil)
 var _ bookstore.AudioStore = (*Store)(nil)
 var _ bookstore.PresignStore = (*Store)(nil)
 var _ bookstore.ProgressStore = (*Store)(nil)
-var _ bookstore.BrowseStore = (*Store)(nil)
 var _ bookstore.CoverStore = (*Store)(nil)
 var _ taskqueue.Producer = (*Store)(nil)
 var _ taskqueue.Consumer = (*Store)(nil)
@@ -790,25 +789,6 @@ func parseAudioTask(raw json.RawMessage) (domain.AudioTask, error) {
 	}, nil
 }
 
-// ── BrowseStore ────────────────────────────────────────────────────────────────
-
-func (s *Store) PutBrowsePage(ctx context.Context, genre, sort, status, novelType string, page int, data []byte) error {
-	key := BrowseObjectKey(genre, sort, status, novelType, page)
-	if err := s.mc.putBrowse(ctx, key, data); err != nil {
-		return fmt.Errorf("PutBrowsePage: %w", err)
-	}
-	return nil
-}
-
-func (s *Store) GetBrowsePage(ctx context.Context, genre, sort, status, novelType string, page int) ([]byte, bool, error) {
-	key := BrowseObjectKey(genre, sort, status, novelType, page)
-	data, ok, err := s.mc.getBrowse(ctx, key)
-	if err != nil {
-		return nil, false, fmt.Errorf("GetBrowsePage: %w", err)
-	}
-	return data, ok, nil
-}
-
 // ── CoverStore ─────────────────────────────────────────────────────────────────
 
 func (s *Store) PutCover(ctx context.Context, slug string, data []byte, contentType string) error {