feat(photos): adaptive aspect ratio per entry (portrait 4:5, landscape 4:3)

Portrait entries (first image taller than wide) get a 4:5 container —
Instagram's proven cap that prevents single photos dominating the screen.
Landscape entries keep 4:3. Aspect-ratio moved from slide to wrap so the
strip inherits it via height:100%.

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

themes/intotheeast/templates/trip.html.twig

@@ -247,7 +247,9 @@
 
                         {% set images = entry.media.images %}
                         {% if images|length > 0 %}
-                        <div class="journal-photo-wrap">
+                        {% set firstImg = images|first %}
+                        {% set wrapRatio = firstImg.height > firstImg.width ? '4 / 5' : '4 / 3' %}
+                        <div class="journal-photo-wrap" style="aspect-ratio: {{ wrapRatio }}">
                             <div class="journal-photo-strip pswp-gallery" id="gallery-{{ entry.slug }}">
                                 {% for img in images %}
                                 <a class="journal-photo-slide"