test(trip): add AE4 no-banner coverage + record deferred review findings

- trip-header.spec.js: new U4/R9/AE4 test — a trip with no cover_image and no
  entry images renders its text header with no .trip-header-banner strip.
- Makefile: demo-load/demo-reset now also (un)load the no-photos-demo fixture,
  guarded with `|| true` so runs whose user/ predates the fixture skip it
  instead of failing globalSetup.
- plan: post-review follow-up notes the applied fixes and records the two
  intentionally-deferred findings (macro-owned resolution per KTD2; inline
  toggle script per U4's Approach) so they are not re-flagged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RDS6t8wcpbwKvvrxykVQ5K

tests/ui/trip/trip-header.spec.js

@@ -3,6 +3,7 @@
 const { test, expect } = require('@playwright/test');
 
 const TRIP_URL = '/trips/italy-2026-demo';
+const NO_PHOTOS_URL = '/trips/no-photos-demo'; // no cover_image, one image-less entry
 
 const topOf = async (locator) => (await locator.boundingBox()).y;
 
@@ -65,6 +66,19 @@ test('U4/R9/AE3: banner falls back to the first journal entry image', async ({ p
     await expect(img).toHaveAttribute('alt', 'Tuscany 2026');
 });
 
+// ── R9/AE4: no cover_image and no entry images → text-only header, no banner ───
+test('U4/R9/AE4: trip with no cover and no entry images renders no banner strip', async ({ page }) => {
+    await page.goto(NO_PHOTOS_URL);
+    // The text extras still render (the header is not blank)...
+    await expect(page.locator('.home-trip-name')).toHaveText('Notes from the Road 2027');
+    await expect(page.locator('.home-trip-tagline')).toBeVisible();
+    // ...and there is a journal entry, so the empty-cover path is the macro's
+    // fallback loop finding no image — not simply an empty trip.
+    await expect(page.locator('.feed .journal-post')).toHaveCount(1);
+    // With no resolvable cover, the banner strip is omitted entirely (AE4).
+    await expect(page.locator('.trip-header-banner')).toHaveCount(0);
+});
+
 // ── R10/AE6: the map+journal split is intact with no header above it ───────────
 test('U4/R10/AE6: map+journal split renders with the extras inside the feed column', async ({ page }) => {
     await page.goto(TRIP_URL);