feat: restore opt-in first-run onboarding

src/modules/services/ObsidianSettingService.unit.spec.ts

@@ -0,0 +1,15 @@
+import { describe, expect, it } from "vitest";
+import type { ObsidianLiveSyncSettings } from "@vrtmrz/livesync-commonlib/compat/common/types";
+import { normaliseObsidianSettingsData } from "./ObsidianSettingService.ts";
+
+describe("normaliseObsidianSettingsData", () => {
+    it("maps Obsidian's missing data value to Commonlib's new-Vault input", () => {
+        expect(normaliseObsidianSettingsData(null)).toBeUndefined();
+    });
+
+    it("preserves stored settings", () => {
+        const settings = { isConfigured: false } as ObsidianLiveSyncSettings;
+
+        expect(normaliseObsidianSettingsData(settings)).toBe(settings);
+    });
+});