fix: add collection config to demo dailies.md; photo strip keyboard access

- demo dailies.md: add content.items collection config (required for page.collection())
- base.html.twig: add tabindex="0" to journal-photo-strip for WCAG scrollable-region-focusable

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

docs/demo/trips/italy-2026-demo/dailies/dailies.md

@@ -1,4 +1,11 @@
 ---
 title: Journal
 template: dailies
+content:
+    items: '@self.children'
+    order:
+        by: date
+        dir: desc
+    filter:
+        published: true
 ---

themes/intotheeast/templates/partials/base.html.twig

@@ -32,6 +32,7 @@
     document.querySelectorAll('.journal-photo-strip').forEach(function (strip) {
         strip.setAttribute('role', 'region');
         strip.setAttribute('aria-label', 'Photo strip');
+        strip.setAttribute('tabindex', '0');
 
         var slideCount = parseInt(strip.dataset.slides, 10) || 1;
         var dots = strip.nextElementSibling;