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/concerts.go

@@ -14,10 +14,10 @@ func (c *Client) GetConcerts(ctx context.Context, page, pageSize int) (*models.C
 		"page_size": "20",
 	}
 	if page > 0 {
-		params["page"] = fmt.Sprintf("%d", page)
+		params["page"] = fmt.Sprint(page)
 	}
 	if pageSize > 0 {
-		params["page_size"] = fmt.Sprintf("%d", pageSize)
+		params["page_size"] = fmt.Sprint(pageSize)
 	}
 
 	var result models.ConcertFeed
@@ -37,13 +37,10 @@ func (c *Client) GetConcertFeed(ctx context.Context) (*models.ConcertFeed, error
 }
 
 // GetConcertInfo gets concert info
+// GET /concerts/{concertID}/info
 func (c *Client) GetConcertInfo(ctx context.Context, concertID string) (*models.ConcertInfo, error) {
-	params := map[string]string{
-		"concert_id": concertID,
-	}
-
 	var result models.ConcertInfo
-	if err := c.request.Get(ctx, "/concerts/info", params, &result); err != nil {
+	if err := c.request.Get(ctx, fmt.Sprintf("/concerts/%s/info", concertID), nil, &result); err != nil {
 		return nil, err
 	}
 	return &result, nil
@@ -59,20 +56,11 @@ func (c *Client) GetConcertLocations(ctx context.Context) (*models.ConcertLocati
 }
 
 // GetConcertTabs gets concert tabs
-func (c *Client) GetConcertTabs(ctx context.Context, concertID string) ([]*models.ConcertTabConfig, error) {
-	params := map[string]string{
-		"concert_id": concertID,
-	}
-
-	var result []models.ConcertTabConfig
-	if err := c.request.Get(ctx, "/concerts/tabs", params, &result); err != nil {
+// GET /concerts/tab-config
+func (c *Client) GetConcertTabs(ctx context.Context) (*models.ConcertTabConfig, error) {
+	var result models.ConcertTabConfig
+	if err := c.request.Get(ctx, "/concerts/tab-config", nil, &result); err != nil {
 		return nil, err
 	}
-
-	tabs := make([]*models.ConcertTabConfig, len(result))
-	for i := range result {
-		result[i].SetClient(c)
-		tabs[i] = &result[i]
-	}
-	return tabs, nil
+	return &result, nil
 }