Fix API endpoints: resource IDs in URL path, not query params

- artists/{artist_id}/tracks and /direct-albums: artistID in path, return ArtistTracks/ArtistAlbums with pager
- likes: /users/me/likes/{type}s/{add-multiple|remove}, IDs as body params
- queue: /queues/{queue_id}/... instead of /queue/...?queue_id=...
- radio: /rotor/station/{station_id}/info and /tracks
- concerts: /concerts/{concert_id}/info, /concerts/tab-config
- playlists: /users/{user_id}/playlists
- labels: /labels/{label_id}, /albums, /artists
- clips: /clips/will/like, /artists/{artist_id}/blocks/artist-clips
- feed: /landing3/* endpoints

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

internal/client/labels.go

@@ -23,13 +23,10 @@ func (c *Client) GetLabels(ctx context.Context) ([]*models.Label, error) {
 }
 
 // GetLabel gets a label by ID
+// GET /labels/{labelID}
 func (c *Client) GetLabel(ctx context.Context, labelID string) (*models.Label, error) {
-	params := map[string]string{
-		"label_id": labelID,
-	}
-
 	var result models.Label
-	if err := c.request.Get(ctx, "/labels", params, &result); err != nil {
+	if err := c.request.Get(ctx, fmt.Sprintf("/labels/%s", labelID), nil, &result); err != nil {
 		return nil, err
 	}
 	result.SetClient(c)
@@ -37,10 +34,9 @@ func (c *Client) GetLabel(ctx context.Context, labelID string) (*models.Label, e
 }
 
 // GetLabelAlbums gets albums for a label
+// GET /labels/{labelID}/albums
 func (c *Client) GetLabelAlbums(ctx context.Context, labelID string, page, pageSize int) (*models.LabelAlbums, error) {
-	params := map[string]string{
-		"label_id": labelID,
-	}
+	params := map[string]string{}
 	if page > 0 {
 		params["page"] = fmt.Sprintf("%d", page)
 	}
@@ -49,17 +45,16 @@ func (c *Client) GetLabelAlbums(ctx context.Context, labelID string, page, pageS
 	}
 
 	var result models.LabelAlbums
-	if err := c.request.Get(ctx, "/labels/albums", params, &result); err != nil {
+	if err := c.request.Get(ctx, fmt.Sprintf("/labels/%s/albums", labelID), params, &result); err != nil {
 		return nil, err
 	}
 	return &result, nil
 }
 
 // GetLabelArtists gets artists for a label
+// GET /labels/{labelID}/artists
 func (c *Client) GetLabelArtists(ctx context.Context, labelID string, page, pageSize int) (*models.LabelArtists, error) {
-	params := map[string]string{
-		"label_id": labelID,
-	}
+	params := map[string]string{}
 	if page > 0 {
 		params["page"] = fmt.Sprintf("%d", page)
 	}
@@ -68,7 +63,7 @@ func (c *Client) GetLabelArtists(ctx context.Context, labelID string, page, page
 	}
 
 	var result models.LabelArtists
-	if err := c.request.Get(ctx, "/labels/artists", params, &result); err != nil {
+	if err := c.request.Get(ctx, fmt.Sprintf("/labels/%s/artists", labelID), params, &result); err != nil {
 		return nil, err
 	}
 	return &result, nil