fix(types): MusicRequest model type to string, remove duplicate is_instrumental/lyrics_optimizer

Author: Raylan LIN

src/types/api.ts

@@ -229,7 +229,7 @@ export interface VideoTaskResponse {
 // ---- Music ----
 
 export interface MusicRequest {
-  model: 'music-2.5' | 'music-2.5+';
+  model: string;
   prompt?: string;
   lyrics?: string;
   is_instrumental?: boolean;
@@ -246,8 +246,6 @@ export interface MusicRequest {
   output_format?: 'url' | 'hex';
   stream?: boolean;
   aigc_watermark?: boolean;
-  lyrics_optimizer?: boolean;
-  is_instrumental?: boolean;
 }
 
 export interface MusicResponse {