feat(dashboard): owner-only GET/PUT /api/dashboard/layout

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/api/dashboard.test.js

@@ -0,0 +1,34 @@
+import { describe, it, expect, beforeAll } from 'vitest';
+import request from 'supertest';
+import { setup } from './helpers.js';
+
+let app, ownerHeaders;
+beforeAll(async () => { ({ app, ownerHeaders } = await setup()); });
+
+describe('dashboard layout api', () => {
+  it('401 without auth', async () => {
+    const res = await request(app).get('/api/dashboard/layout');
+    expect(res.status).toBe(401);
+  });
+
+  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: {} });
+  });
+
+  it('PUT persists and GET reflects it', async () => {
+    const body = { card_order: ['clock', 'weather'], hidden: [], sizes: { weather: 's' } };
+    const put = await request(app).put('/api/dashboard/layout').set(ownerHeaders).send(body);
+    expect(put.status).toBe(200);
+    const get = await request(app).get('/api/dashboard/layout').set(ownerHeaders);
+    expect(get.body.card_order).toEqual(['clock', 'weather']);
+    expect(get.body.sizes).toEqual({ weather: 's' });
+  });
+
+  it('PUT rejects a bad size value', async () => {
+    const res = await request(app).put('/api/dashboard/layout').set(ownerHeaders)
+      .send({ card_order: [], hidden: [], sizes: { weather: 'huge' } });
+    expect(res.status).toBe(400);
+  });
+});