fix: reliable concerts (backend events cache) + web importer preview layout

- Backend now caches Ticketmaster events per artist and prefers the larger
  recent result, so a flaky partial/empty response can't shrink a good list;
  every client (web/Android) stays consistent (1h TTL self-heals).
- Web SoundCloud importer preview: add the missing .gtrack-num grid cell so
  the 4-column row no longer squeezes the cover/title (title was wrapping one
  char per line).
- CHANGELOG [2.3] opened for this batch.

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

CHANGELOG.md

@@ -64,6 +64,41 @@ Versioning: two-part `MAJOR.MINOR` — each release bumps the minor (features an
 
 ---
 
+## [2.3] — 2026-08-21
+
+A cleanup-and-parity release: the **Song Importer moves into the Global Search field** (one field,
+like Android), concert events become **reliable across web/Android**, and several Android gaps close.
+
+### Added
+- **Unified Global Search field (Web)** — the separate Song-Importer page/sidebar entry is gone. The
+  one search field now auto-detects: a **link** (Spotify/SoundCloud/YouTube) opens the importer
+  preview, plain **text** runs a Deezer search. Cleaner left nav, same behaviour as Android.
+
+### Fixed
+- **Concert events reliability (Web + Android)** — Ticketmaster's free `keyword` search intermittently
+  returns a partial subset (or none), so back-to-back calls disagreed (web showed 7, a later live
+  call got only 2, Android sometimes showed 0). The web had a private 30-min cache masking this; the
+  cache now lives **on the backend** and **prefers the larger recent result**, so a flaky response
+  can't shrink a good list and every client stays consistent (1 h TTL self-heals).
+- **Concert date/time (Web + Android)** — shows the **venue-local** time (Ticketmaster's `localDate`/
+  `localTime`) instead of the UTC instant, so a 20:00 show no longer displayed as 08:00. Android
+  parses the naive local datetime (was crashing on zone-less values → missing times).
+- **Concert rows uneven (Android)** — rebuilt each row with a fixed-width calendar-style date block
+  (day big, month/year + time small), so every row is the same height and the divider/venue align.
+- **Concert load failures were silent (Android)** — the fetch swallowed errors and showed an empty
+  list. Errors now surface ("Konzerte konnten nicht geladen werden" + reason), with a request
+  timeout and non-2xx treated as a real failure.
+- **Web importer preview layout** — the SoundCloud track row was missing its grid number-cell, so the
+  4-column `.gtrack-item` grid squeezed the cover into 28px and the title into 52px (title wrapped
+  one character per line). Added the missing cell.
+- **Android artist albums incomplete** — `lookupArtistAlbums` filtered to `record_type == "album"`,
+  dropping EPs and singles that Deezer (and the web app) show. Now returns all, sorted album → EP →
+  single.
+- **"Falscher Künstler?" pin button minimised (Web + Android)** — reduced to a small ⚙ icon-only pill
+  in the artist hero's corner instead of a full-width labelled button.
+
+---
+
 ## [2.2] — 2026-08-19
 
 Gets YouTube downloads working again after they broke on two independent fronts.