Fix R128 and remaining ID fields to accept both JSON types

- Track.R128 and TrackShort.R128: float64 → JSONR128 (accepts both JSON number and object)
- All remaining primary ID fields: string → JSONID (accepts both JSON string and number)
  Fixed in: account, artist, clip, concert, feed, label, landing, metatag,
  music_history, pin, queue, radio, search, settings, supplement

internal/models/feed.go

@@ -122,7 +122,7 @@ func (d *Day) DeList(data []byte, c ClientInterface) ([]Model, error) {
 // DayBlock represents a block in a day.
 type DayBlock struct {
 	BaseModel
-	ID          string        `json:"id"`
+	ID JSONID `json:"id"`
 	Type        string        `json:"type"`
 	Title       string        `json:"title"`
 	Description string        `json:"description"`
@@ -141,7 +141,7 @@ type DayBlockData struct {
 // GeneratedPlaylist represents a generated playlist.
 type GeneratedPlaylist struct {
 	BaseModel
-	ID          string  `json:"id"`
+	ID JSONID `json:"id"`
 	Title       string  `json:"title"`
 	Description string  `json:"description"`
 	CoverURI    string  `json:"cover_uri"`
@@ -261,7 +261,7 @@ type TrackWithAds struct {
 // Ad represents an ad.
 type Ad struct {
 	BaseModel
-	ID          string `json:"id"`
+	ID JSONID `json:"id"`
 	Type        string `json:"type"`
 	Title       string `json:"title"`
 	Description string `json:"description"`