test: cover export fallback behavior

apps/desktop/src/lib/export.test.ts

@@ -143,6 +143,33 @@ describe("export generation", () => {
     expect(parsed.headline).toBe("");
   });
 
+  it("generates chart summary JSON when export summary is absent", () => {
+    const songWithoutExportSummary: Partial<RehearsalSong> = { ...mockSong };
+    delete songWithoutExportSummary.exportSummary;
+
+    const parsed = JSON.parse(generateChartSummaryJson(songWithoutExportSummary as RehearsalSong));
+
+    expect("exportSummary" in songWithoutExportSummary).toBe(false);
+    expect(parsed).toMatchObject({
+      title: "Test",
+      headline: "",
+      sections: [
+        {
+          label: "verse",
+          groove: "swing",
+          roles: [
+            {
+              name: "Bass",
+              chord: "=Cmaj7",
+              cue: "1, 2, 3",
+              priority: "high"
+            }
+          ]
+        }
+      ]
+    });
+  });
+
   it("generates a metadata-only local handoff without source paths or transcription data", () => {
     const sourceBootstrap: ProjectBootstrapSummary = {
       projectId: "project-1",
@@ -202,7 +229,7 @@ describe("export generation", () => {
     });
   });
 
-  it("uses the song identity as the default handoff workspace identity", () => {
+  it("uses the song identity and an empty source asset list as the default handoff identity", () => {
     const json = generateMetadataHandoffJson(mockSong, {
       createdAt: "2026-06-15T08:30:00.000Z"
     });
@@ -213,6 +240,9 @@ describe("export generation", () => {
       title: "Test",
       workspaceVersion: 1
     });
+    expect(parsed).toHaveProperty("sourceAssets");
+    expect(parsed.sourceAssets).toEqual([]);
+    expect(json).not.toContain("sourcePath");
   });
 
   it("creates a local re-analysis request from a received handoff and selected replacement asset", () => {