Add slideshow: root-level, shuffle, fullscreen, click-to-album

- Root slideshow: all_media_entries walks the full media tree so
  /slideshow/ shows every photo across all albums; Slideshow button
  always appears on the root album page
- Shuffle and Full screen checkboxes sit next to the Slideshow button
  on the album page; options pass as ?shuffle=1&fullscreen=1 URL params
- Fullscreen uses a tap-to-activate overlay (browsers block auto-entry
  on page load); webkit-prefixed for Safari; ⛶ button and F key for
  mid-session toggle
- Fullscreen mode hides controls, counter, caption bar, and site header
- Exiting fullscreen auto-pauses so the current photo stays visible
- Click/tap anywhere in the stage navigates to the photo's album
  lightbox; reads the live src attribute instead of ssIdx to avoid a
  race where ssIdx advances during the cross-fade while the old photo
  is still on screen
- layout.erb excluded from slideshow (layout: false) so the site header
  never appears there
- CSS cache-busted with ?v=2

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

1 files changed, 20 insertions, 2 deletions

diff --git a/app.rb b/app.rb
index 8667471..dde6125 100644
--- a/app.rb
+++ b/app.rb
@@ -250,6 +250,18 @@ get '/slideshow/*' do
   slideshow_view(params[:splat].first.chomp('/'))
 end
 
+def all_media_entries
+  dirs = [MEDIA_ROOT] + Dir.glob("#{MEDIA_ROOT}/**/*/").sort
+  dirs.flat_map do |dir|
+    rel  = dir.delete_prefix(MEDIA_ROOT).delete_prefix('/')
+    data = load_album(dir)
+    next [] if data['visible'] == false && !admin?
+    album_files(dir, data).select { |e| %i[image video].include?(e[:type]) }.map do |e|
+      e.merge(file_rel: rel.empty? ? e[:name] : "#{rel}/#{e[:name]}")
+    end
+  end
+end
+
 def slideshow_view(rel)
   dir  = resolve_dir(rel)
   halt 404 unless File.directory?(dir)
@@ -258,8 +270,14 @@ def slideshow_view(rel)
 
   @rel     = rel
   @title   = data['title'] || (rel.empty? ? 'Albums' : File.basename(dir))
-  @entries = album_files(dir, data).select { |e| %i[image video].include?(e[:type]) }
-  erb :slideshow
+  @entries = if rel.empty?
+    all_media_entries
+  else
+    album_files(dir, data)
+      .select { |e| %i[image video].include?(e[:type]) }
+      .map    { |e| e.merge(file_rel: "#{rel}/#{e[:name]}") }
+  end
+  erb :slideshow, layout: false
 end
 
 # ── Admin routes ───────────────────────────────────────────────────────────────