feat(dailies): 4:3 photo strip, lightbox, and dot sync

- Aspect ratio 3:2 → 4:3 (less aggressive crop; closer to phone native)
- Slides become <button> elements with data-full pointing to original image
- Tap/click any photo in the feed opens a full-screen lightbox showing the
  uncropped original; prev/next browses all feed photos; Esc/arrows/backdrop
  click close
- Dot indicator now syncs with scroll via IntersectionObserver

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

themes/intotheeast/css/style.css

@@ -216,8 +216,13 @@ body::after {
 .journal-photo-slide {
     flex: 0 0 100%;
     scroll-snap-align: start;
-    aspect-ratio: 3 / 2;
+    aspect-ratio: 4 / 3;
     overflow: hidden;
+    cursor: zoom-in;
+    background: none;
+    border: none;
+    padding: 0;
+    display: block;
 }
 
 .journal-photo-slide img {
@@ -225,8 +230,11 @@ body::after {
     height: 100%;
     object-fit: cover;
     display: block;
+    transition: opacity 0.15s;
 }
 
+.journal-photo-slide:hover img { opacity: 0.9; }
+
 .journal-photo-dots {
     display: flex;
     justify-content: center;