Persist selections and compile song output

Sources/MusicAssistantCore/Services/AI/AIService.swift

@@ -65,15 +65,20 @@ public struct SongProjectGenerationRequest: Equatable, Sendable {
     public var context: AIRequestContext
     public var seedProject: SongProject?
     public var discussionMode: ConversationMode
+    public var songGenerationContext: SongGenerationContext
 
     public init(
         context: AIRequestContext,
         seedProject: SongProject? = nil,
-        discussionMode: ConversationMode = .auto
+        discussionMode: ConversationMode = .auto,
+        songGenerationContext: SongGenerationContext? = nil
     ) {
         self.context = context
         self.seedProject = seedProject
         self.discussionMode = discussionMode
+        self.songGenerationContext = songGenerationContext
+            ?? seedProject.map(SongGenerationContext.init(project:))
+            ?? .empty
     }
 }
 
@@ -96,10 +101,16 @@ public struct SongProjectGenerationResult: Equatable, Sendable {
 public struct SongProjectDiscussionRequest: Equatable, Sendable {
     public var context: AIRequestContext
     public var project: SongProject
+    public var songGenerationContext: SongGenerationContext
 
-    public init(context: AIRequestContext, project: SongProject) {
+    public init(
+        context: AIRequestContext,
+        project: SongProject,
+        songGenerationContext: SongGenerationContext? = nil
+    ) {
         self.context = context
         self.project = project
+        self.songGenerationContext = songGenerationContext ?? SongGenerationContext(project: project)
     }
 }
 
@@ -118,17 +129,20 @@ public struct LyricsRevisionRequest: Equatable, Sendable {
     public var project: SongProject
     public var sourceLyrics: Lyrics
     public var mode: LyricsRevisionMode
+    public var songGenerationContext: SongGenerationContext
 
     public init(
         context: AIRequestContext,
         project: SongProject,
         sourceLyrics: Lyrics,
-        mode: LyricsRevisionMode
+        mode: LyricsRevisionMode,
+        songGenerationContext: SongGenerationContext? = nil
     ) {
         self.context = context
         self.project = project
         self.sourceLyrics = sourceLyrics
         self.mode = mode
+        self.songGenerationContext = songGenerationContext ?? SongGenerationContext(project: project)
     }
 }
 
@@ -154,15 +168,18 @@ public struct SongProjectUpdateRequest: Equatable, Sendable {
     public var context: AIRequestContext
     public var project: SongProject
     public var allowedScopes: [SongProjectUpdateScope]
+    public var songGenerationContext: SongGenerationContext
 
     public init(
         context: AIRequestContext,
         project: SongProject,
-        allowedScopes: [SongProjectUpdateScope]
+        allowedScopes: [SongProjectUpdateScope],
+        songGenerationContext: SongGenerationContext? = nil
     ) {
         self.context = context
         self.project = project
         self.allowedScopes = allowedScopes
+        self.songGenerationContext = songGenerationContext ?? SongGenerationContext(project: project)
     }
 }