Real-image posters of library titles: use the 500 px copy

Library titles fetched Radarr's/Sonarr's 250×375 poster copy, which
real images show at up to 640 pixels, so movie posters looked soft next
to series posters that came from the provider's full-size original
(Sonarr behind a login). With real images the 500×750 copy is used;
block-character posters keep the small one.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019reK4DUGYqDUjniWYJvwUW

internal/ui/cover.go

@@ -468,7 +468,7 @@ func (c *coverView) build(cols, rows int) []styledCell {
 // coverRef says where a poster comes from. The zero value means "no poster".
 type coverRef struct {
 	key   string // identifies the poster in the cache
-	fetch func(ctx context.Context) ([]byte, error)
+	fetch func(ctx context.Context, large bool) ([]byte, error) // large: for real images
 }
 
 // coverFor builds the poster reference of a title from its image list.
@@ -516,6 +516,7 @@ func (a *App) loadCover(ref coverRef, done func(*image.RGBA, error)) {
 	}
 	c.waiting[ref.key] = []func(*image.RGBA, error){done}
 	maxHeight := a.coverMaxHeight()
+	large := a.gfx != nil // real images show the poster at full resolution
 
 	go func() {
 		c.slots <- struct{}{}
@@ -523,7 +524,7 @@ func (a *App) loadCover(ref coverRef, done func(*image.RGBA, error)) {
 		ctx, cancel := context.WithTimeout(context.Background(), 25*time.Second)
 		defer cancel()
 		var img *image.RGBA
-		data, err := ref.fetch(ctx)
+		data, err := ref.fetch(ctx, large)
 		if err == nil {
 			img, err = decodeCover(data, maxHeight)
 		}

internal/ui/cover_test.go

@@ -165,7 +165,7 @@ func TestLoadCoverCachesAndDedupes(t *testing.T) {
 	var fetches atomic.Int32
 	var buf bytes.Buffer
 	png.Encode(&buf, stripes(10, 20))
-	ref := coverRef{key: "k", fetch: func(context.Context) ([]byte, error) {
+	ref := coverRef{key: "k", fetch: func(context.Context, bool) ([]byte, error) {
 		fetches.Add(1)
 		return buf.Bytes(), nil
 	}}
@@ -186,7 +186,7 @@ func TestLoadCoverRemembersFailures(t *testing.T) {
 	a := newTestApp(t)
 	a.coverCache.failed["bad"] = time.Now()
 	var gotErr error
-	a.loadCover(coverRef{key: "bad", fetch: func(context.Context) ([]byte, error) {
+	a.loadCover(coverRef{key: "bad", fetch: func(context.Context, bool) ([]byte, error) {
 		t.Error("a recent failure must not be retried")
 		return nil, nil
 	}}, func(_ *image.RGBA, err error) { gotErr = err })

internal/ui/detail_test.go

@@ -116,7 +116,7 @@ func TestPosterWaitsWhileTheSelectionMoves(t *testing.T) {
 	img := image.NewRGBA(image.Rect(0, 0, 20, 30))
 	a.coverCache.imgs["one"], a.coverCache.imgs["two"] = img, img
 	ref := func(key string) coverRef {
-		return coverRef{key: key, fetch: func(context.Context) ([]byte, error) { return nil, nil }}
+		return coverRef{key: key, fetch: func(context.Context, bool) ([]byte, error) { return nil, nil }}
 	}
 	d := newDetailPane(a)