test: update dashboard_layout defaults to include geom/extras (2.8.0 follow-up)

These two assertions asserted the pre-2.8.0 shape; the canvas feature
added geom+extras to the repo/route defaults. push.sh doesn't run unit
tests, so they went red unnoticed until the full vitest run.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/api/dashboard.test.js

@@ -14,7 +14,7 @@ describe('dashboard layout api', () => {
   it('GET returns defaults', async () => {
     const res = await request(app).get('/api/dashboard/layout').set(ownerHeaders);
     expect(res.status).toBe(200);
-    expect(res.body).toEqual({ card_order: [], hidden: [], sizes: {} });
+    expect(res.body).toEqual({ card_order: [], hidden: [], sizes: {}, geom: {}, extras: [] });
   });
 
   it('PUT persists and GET reflects it', async () => {

tests/repos/dashboard_layout.test.js

@@ -8,7 +8,7 @@ beforeAll(async () => { await resetDb(); await migrateUp(); });
 describe('dashboard_layout repo', () => {
   it('returns defaults when unset', async () => {
     const l = await repo.get();
-    expect(l).toEqual({ card_order: [], hidden: [], sizes: {} });
+    expect(l).toEqual({ card_order: [], hidden: [], sizes: {}, geom: {}, extras: [] });
   });
 
   it('upserts and reads back', async () => {