fix: update tests for demo reorganisation (italy-2026-demo, central-asia ordering, japan real entry)

- dailies T2: switch ordering test to central-asia-2023 (pixelfed-1 oldest, pixelfed-22 newest)
- dailies T3-T6: update KNOWN_SLUG/TITLE/CITY/COUNTRY to the real japan entry (2026-06-17)
- stories S1-S7: update all italy-2025 URLs to italy-2026-demo
- stories S5/S6: fix URL regex and use val-dorcia-dawn for hero sanity check
- maps M5/M6: point Italy GPX map tests to italy-2026-demo (has markers + GPX)
- global-setup: run make demo-load before tests so italy-2026-demo always exists
- post P2: add retries:1 + test.setTimeout(60s) for intermittent FilePond upload
- user: story template hero fallback for media.types config override (see user commit)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr

tests/ui/maps.spec.js

@@ -48,7 +48,7 @@ test('M5: Italy map page renders without JS errors (GPX present)', async ({ page
     const errors = [];
     page.on('pageerror', e => errors.push(e.message));
 
-    await page.goto('/trips/italy-2025/map');
+    await page.goto('/trips/italy-2026-demo/map');
     await expect(page.locator('canvas.maplibregl-canvas')).toBeVisible({ timeout: 10000 });
     // Wait for markers to confirm map.on('load') completed
     await expect(page.locator('.maplibregl-marker').first()).toBeVisible({ timeout: 15000 });
@@ -60,7 +60,7 @@ test('M5: Italy map page renders without JS errors (GPX present)', async ({ page
 
 // ── M6: Italy map — journey source exists after GPX loads ────────────────────
 test('M6: Italy map has a journey MapLibre source after GPX settles', async ({ page }) => {
-    await page.goto('/trips/italy-2025/map');
+    await page.goto('/trips/italy-2026-demo/map');
     await expect(page.locator('canvas.maplibregl-canvas')).toBeVisible({ timeout: 10000 });
     await expect(page.locator('.maplibregl-marker').first()).toBeVisible({ timeout: 15000 });