docs: note that tracks/ supports nested album subdirectories

CLAUDE.md

@@ -37,10 +37,12 @@ On the Storage Box, mounted at `/mnt/trashbox/denpa-radio/library/` on summer:
 <station-id>/                  # id must match [a-z0-9-]+
 ├── _meta.yml                  # name, description, color, tags
 ├── cover.{jpg,png,webp}       # optional; served by /api/stations/<id>/cover
-├── tracks/                    # any decoder-supported audio (flac, mp3, opus, m4a, wav, ogg)
+├── tracks/                    # audio files; subdirs supported (e.g. tracks/Volume Alpha/, tracks/Singles/)
 └── jingles/                   # optional, currently unused in v1
 ```
 
+Liquidsoap's `playlist()` recurses into subdirectories of `tracks/` by default — organize by album/source however you like. Any decoder-supported audio works (flac, mp3, opus, m4a, wav, ogg). Non-audio files in `tracks/` will be picked up and fail to decode (FFmpeg returns no audio stream); keep cover art and other non-audio at the station root, NOT inside `tracks/`.
+
 Adding a station: mkdir + `_meta.yml` + tracks → edit `config/liquidsoap.liq` to add a new station block following the `# === station: <id> ===` pattern → tar-pipe the script and `docker compose restart liquidsoap` on summer. The frontend's `/api/stations.json` picks up the new entry within ~30s (Cache-Control max-age) without a rebuild. No Caddy reload, no Icecast restart.
 
 ## Deployment target ("summer")

README.md

@@ -46,7 +46,7 @@ three docker containers (icecast, liquidsoap, frontend) and a Caddy host service
 on the storage box (mounted at `/mnt/trashbox/denpa-radio/library/` on summer):
 
 ```
-mkdir <station-id>/{tracks,jingles}
+mkdir -p <station-id>/{tracks,jingles}
 cat > <station-id>/_meta.yml <<EOF
 name: My Station
 description: short description
@@ -54,7 +54,8 @@ color: '#5cae34'
 tags: [tag1, tag2]
 EOF
 # drop audio files into <station-id>/tracks/
-# (optional) drop cover.jpg into <station-id>/
+# subdirs supported: tracks/Volume Alpha/, tracks/Singles/, etc — Liquidsoap recurses
+# (optional) drop cover.jpg into <station-id>/  (NOT inside tracks/ — would fail to decode)
 ```
 
 then on summer: