Add photo counts, EXIF details, video duration badges, slideshow launcher UI

- Album cards show recursive photo count (bubbles up through sub-albums).
- Lightbox info panel shows camera, aperture, shutter speed, and ISO;
  update.rb now extracts and stores these EXIF fields.
- Video thumbnail cards show a duration badge (e.g. "1:23").
- Slideshow launcher redesigned: button on its own line, with Shuffle /
  Full screen / Interval options on a second line, all inside a rounded
  border to make the grouping clear.
- Fixed album-actions alignment so Interval sits level with the checkboxes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/public/js/album.js b/public/js/album.js
index c3f775f..3fca29b 100644
--- a/public/js/album.js
+++ b/public/js/album.js
@@ -45,6 +45,10 @@ function lbBuildInfo(e) {
     rows.push(['Date', d.toLocaleString(undefined, { dateStyle: 'medium', timeStyle: 'short' })]);
   }
   if (e.width && e.height) rows.push(['Dimensions', `${e.width} × ${e.height}`]);
+  if (e.camera)   rows.push(['Camera',   e.camera]);
+  if (e.aperture) rows.push(['Aperture', e.aperture]);
+  if (e.shutter)  rows.push(['Shutter',  e.shutter]);
+  if (e.iso)      rows.push(['ISO',      e.iso]);
   document.getElementById('lb-info-dl').innerHTML =
     rows.map(([k, v]) => `<dt>${k}</dt><dd>${v}</dd>`).join('');
   document.getElementById('lb-info-panel').classList.add('hidden');