Design pass on the web UI: amber for new, EQ bars, keyboard feed list

Works through TODO.md from the 2026-09-11 review. Unread badges, dots and
download bars take the icon's amber; the playing item is marked by EQ bars
that move only while it plays. The feed list is usable from the keyboard,
focus rings show everywhere, and folders get a mosaic of their shows' art
with the triangle hung in the margin. Sentence-case labels, fewer bold
weights, tinted initials tiles, shorter header lines, "Kept" everywhere,
and the list gets the room the empty panes had. Reduced motion is honoured.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TAC7sLVqfKmY6rsTLXzNgk

docs/configuration.md

@@ -32,10 +32,10 @@ media_types       = ["audio", "video"]
   be polled *less* often, and a per-feed `schedule` overrides both. Admin-only from the UI.
 * **`organize`** — `feed` files downloads under the feed's folder; `date` under `YYYY-MM-DD`.
 * **`max_total_gb`** — the reaper deletes to get back under this, oldest first, keeping a 50 MB
-  pad. Starred items are never deleted, and a file only counts as read once every subscriber has
+  pad. Kept items are never deleted, and a file only counts as read once every subscriber has
   read it. `0` disables it entirely.
 * **`max_age_days`** — items older than this with no file on disk are pruned from the database.
-  Starred ones stay. `0` disables it.
+  Kept ones stay. `0` disables it.
 * **`max_new_per_check`** — the cap that stops a new subscription pulling a whole back catalogue.
   `0` means unlimited, which is rarely what you want: subscribing to an OPML of 80 feeds with no cap
   fetched 216 files and 22 GB in one scan.