test(trip-cover): cover-strip + retina-cap regression; bump user pin

- trip-header/trips-list specs now assert the cropZoom wide-strip aspect
  and the all-or-nothing retina rule (1x-only for sub-2w sources), and a
  new regression on us-canada-mex-2024 covers the reported portrait-blur
- remove the orphaned AE4 test (no-photos-demo fixture was deleted)
- backlog: full-res pixelfed reimport (luxury quality item)
- plan: record the cover-quality follow-up + AE4 fixture removal
- bump user pin -> 536ca20 (trip-description-hero cover fix)

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

@@ -3,7 +3,6 @@
 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;
 
@@ -62,21 +61,38 @@ test('U4/R9/AE3: banner falls back to the first journal entry image', async ({ p
     await expect(img).toBeVisible();
     const srcset = await img.getAttribute('srcset');
     expect(srcset).toContain('720w');
-    expect(srcset).toContain('1440w');
+    // The 1200px landscape source can't supply a non-upscaled 2x (needs ≥1440),
+    // so the retina descriptor is omitted entirely — 1x only, no blurry upscale
+    // and no odd intermediate width.
+    expect(srcset).not.toContain('1440w');
+    expect(srcset).not.toContain('1200w');
+    // cropZoom hands over a wide cover strip (~3.27:1); the old cropResize gave
+    // a fit-inside image the object-fit:cover box then upscaled into a blur.
+    const ratio = await img.evaluate((el) => new Promise((res) => {
+        const done = () => res(el.naturalWidth / el.naturalHeight);
+        el.complete && el.naturalWidth ? done() : el.addEventListener('load', done, { once: true });
+    }));
+    expect(ratio).toBeGreaterThan(3);
     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);
+// ── Regression: a portrait fallback source (the reported us-canada-mex-2024
+//    banner) must render a sharp wide cover strip, not a blurry upscaled sliver ─
+test('U4/R9: a portrait fallback source renders a wide cover strip, not a sliver', async ({ page }) => {
+    await page.goto('/trips/us-canada-mex-2024');
+    const img = page.locator('.trip-header-banner img');
+    await expect(img).toBeVisible();
+    const srcset = await img.getAttribute('srcset');
+    expect(srcset).toContain('720w');
+    // 1013px portrait source — nowhere near ≥1440 — so no upscaled 2x candidate.
+    expect(srcset).not.toContain('1440w');
+    // cropZoom crops the tall portrait into a wide cover strip (~3.27:1); the old
+    // cropResize fit it inside as a ~165px sliver the box then upscaled to a blur.
+    const ratio = await img.evaluate((el) => new Promise((res) => {
+        const done = () => res(el.naturalWidth / el.naturalHeight);
+        el.complete && el.naturalWidth ? done() : el.addEventListener('load', done, { once: true });
+    }));
+    expect(ratio).toBeGreaterThan(3);
 });
 
 // ── R10/AE6: the map+journal split is intact with no header above it ───────────