feat: persistence selected mode

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;
+}