feat: persistence selected mode

src/core/KGProject.ts

@@ -31,11 +31,15 @@ export class KGProject {
   @WithDefault("C major")
   private keySignature: KeySignature = "C major";
 
+  @Expose()
+  @WithDefault("ionian")
+  private selectedMode: string = "ionian";
+
   @Expose()
   @WithDefault(0)
   private projectStructureVersion: number = 0;
 
-  public static readonly CURRENT_PROJECT_STRUCTURE_VERSION: number = 1;
+  public static readonly CURRENT_PROJECT_STRUCTURE_VERSION: number = 2;
   
   @Expose()
   @Type(() => KGTrack, {
@@ -50,13 +54,14 @@ export class KGProject {
   private tracks: KGTrack[] = [];
 
   // Constructor
-  constructor(name: string = "Untitled Project", maxBars: number = 32, currentBars: number = 0, bpm: number = 125, timeSignature: TimeSignature = { numerator: 4, denominator: 4 }, keySignature: KeySignature = "C major", tracks: KGTrack[] = [], projectStructureVersion: number = KGProject.CURRENT_PROJECT_STRUCTURE_VERSION) {
+  constructor(name: string = "Untitled Project", maxBars: number = 32, currentBars: number = 0, bpm: number = 125, timeSignature: TimeSignature = { numerator: 4, denominator: 4 }, keySignature: KeySignature = "C major", selectedMode: string = "ionian", tracks: KGTrack[] = [], projectStructureVersion: number = KGProject.CURRENT_PROJECT_STRUCTURE_VERSION) {
     this.name = name;
     this.maxBars = maxBars;
     this.currentBars = currentBars;
     this.bpm = bpm;
     this.timeSignature = timeSignature;
     this.keySignature = keySignature;
+    this.selectedMode = selectedMode;
     this.tracks = tracks;
     this.projectStructureVersion = projectStructureVersion;
   }
@@ -90,6 +95,10 @@ export class KGProject {
     return this.keySignature;
   }
 
+  public getSelectedMode(): string {
+    return this.selectedMode;
+  }
+
   public getTracks(): KGTrack[] {
     return this.tracks;
   }
@@ -115,6 +124,10 @@ export class KGProject {
     this.keySignature = keySignature;
   }
 
+  public setSelectedMode(selectedMode: string): void {
+    this.selectedMode = selectedMode;
+  }
+
   public setTracks(tracks: KGTrack[]): void {
     this.tracks = tracks;
   }

src/core/commands/project/ChangeProjectPropertyCommand.ts

@@ -13,6 +13,7 @@ export interface ProjectUpdateProperties {
   bpm?: number;
   timeSignature?: TimeSignature;
   keySignature?: KeySignature;
+  selectedMode?: string;
 }
 
 /**
@@ -42,6 +43,7 @@ export class ChangeProjectPropertyCommand extends KGCommand {
       bpm: this.targetProject.getBpm(),
       timeSignature: { ...this.targetProject.getTimeSignature() }, // Create a copy
       keySignature: this.targetProject.getKeySignature(),
+      selectedMode: this.targetProject.getSelectedMode(),
     };
 
     // Apply updates and track what actually changes
@@ -95,6 +97,13 @@ export class ChangeProjectPropertyCommand extends KGCommand {
       updatedProperties.push(`keySignature: "${this.originalProperties.keySignature}" → "${this.newProperties.keySignature}"`);
     }
 
+    // Update selected mode
+    if (this.newProperties.selectedMode !== undefined && this.newProperties.selectedMode !== this.originalProperties.selectedMode) {
+      this.targetProject.setSelectedMode(this.newProperties.selectedMode);
+      this.changedProperties.add('selectedMode');
+      updatedProperties.push(`selectedMode: "${this.originalProperties.selectedMode}" → "${this.newProperties.selectedMode}"`);
+    }
+
     if (updatedProperties.length > 0) {
       console.log(`Updated project: ${updatedProperties.join(', ')}`);
     } else {
@@ -147,6 +156,12 @@ export class ChangeProjectPropertyCommand extends KGCommand {
       restoredProperties.push(`keySignature: "${this.originalProperties.keySignature}"`);
     }
 
+    // Restore selected mode (only if it was changed)
+    if (this.changedProperties.has('selectedMode') && this.originalProperties.selectedMode !== undefined) {
+      this.targetProject.setSelectedMode(this.originalProperties.selectedMode);
+      restoredProperties.push(`selectedMode: "${this.originalProperties.selectedMode}"`);
+    }
+
     console.log(`Restored project: ${restoredProperties.join(', ')}`);
   }
 
@@ -171,6 +186,9 @@ export class ChangeProjectPropertyCommand extends KGCommand {
     if (this.newProperties.keySignature !== undefined) {
       updatedProps.push('key signature');
     }
+    if (this.newProperties.selectedMode !== undefined) {
+      updatedProps.push('selected mode');
+    }
 
     if (updatedProps.length === 1) {
       return `Change project ${updatedProps[0]}`;

src/core/project-upgrader/KGProjectUpgrader.ts

@@ -1,5 +1,6 @@
 import { KGProject } from '../KGProject';
 import { upgradeToV1 } from './upgradeToV1';
+import { upgradeToV2 } from './upgradeToV2';
 
 /**
  * Upgrade the given project to the latest structure version, one version at a time.
@@ -23,6 +24,10 @@ export function upgradeProjectToLatest(project: KGProject): KGProject {
         workingProject = upgradeToV1(workingProject);
         break;
       }
+      case 2: {
+        workingProject = upgradeToV2(workingProject);
+        break;
+      }
       default: {
         // If an upgrader is missing, throw to prevent loading incompatible structures
         throw new Error(`No upgrader found for project structure version ${nextVersion}`);

src/core/project-upgrader/upgradeToV2.ts

@@ -0,0 +1,20 @@
+import { KGProject } from '../KGProject';
+
+/**
+ * Upgrade a project from structure version 1 to 2.
+ * Adds the selectedMode field with default value "ionian".
+ */
+export function upgradeToV2(project: KGProject): KGProject {
+  try {
+    // Set default selectedMode to "ionian" if not already set
+    const currentMode = project.getSelectedMode?.();
+    if (!currentMode) {
+      project.setSelectedMode("ionian");
+    }
+  } finally {
+    // Always set the project structure version to 2 to mark migration complete
+    project.setProjectStructureVersion(2);
+  }
+
+  return project;
+}