Move the stats site into a stats/ subdir to keep the album root small

The filter mini-albums put thousands of HTML files directly in the album root.
Reorganise so only the main album lives in DIST_DIR and all stats content goes
under stats/:

  stats/index.html              - the stats overview (was stats.html)
  stats/<pagebase>/index.html   - each filter gallery (was <pagebase>.html)
  stats/<pagebase>/<index>.html - each filter view page (was <pagebase>--N.html)

Each mini-album is its own directory, so no single directory holds more than one
filter's pages. Links updated accordingly: the overview links to <pagebase>/, the
gallery thumbnails link to sibling <index>.html, view prev/next/gallery are
same-dir, and assets/album-details/back-to-stats resolve via the ../.. backhref.
The header Stats link and camera.tmpl back link point at stats/index.html.

Mini-albums still reuse the shared photos/thumbs/blurs assets and render in
parallel. Tests and the dry-run plan updated for the new layout; README documents
the stats/ subdirectory structure.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 9 insertions, 6 deletions

diff --git a/src/lib/album.source.sh b/src/lib/album.source.sh
index 17502ff..532c218 100644
--- a/src/lib/album.source.sh
+++ b/src/lib/album.source.sh
@@ -1091,8 +1091,10 @@ clear_exif_cache() {
 generate_stats_pages() {
     log_verbose 'Stats page enabled; collecting EXIF stats'
     collect_photo_exif_stats
-    render_stats_page . .
-    render_filter_pages . .
+    # Keep the album root uncluttered: the stats overview is stats/index.html and
+    # every filter mini-album lives under stats/<pagebase>/ (see render_filter_pages).
+    render_stats_page stats .. index
+    render_filter_pages
 }
 
 generate() {
@@ -1285,10 +1287,11 @@ print_dry_run_plan() {
     printf '  %s/[redirect].html (%s navigation redirects)\n' \
         "${plan_ref["dist_dir"]}" "${plan_ref["redirect_count"]}"
     if [ "${plan_ref["stats_page"]}" = yes ]; then
-        # The exact camera-page count needs EXIF aggregation, which dry-run
-        # does not perform, so list them as a wildcard.
-        printf '  %s/stats.html (EXIF stats page)\n' "${plan_ref["dist_dir"]}"
-        printf '  %s/camera-*.html (per-camera pages)\n' \
+        # The exact filter mini-album set needs EXIF aggregation, which dry-run
+        # does not perform, so list them as a wildcard under stats/.
+        printf '  %s/stats/index.html (EXIF stats page)\n' \
+            "${plan_ref["dist_dir"]}"
+        printf '  %s/stats/*/ (filter mini-albums)\n' \
             "${plan_ref["dist_dir"]}"
     fi
     if [ "${plan_ref["tarball_include"]}" = yes ]; then