chore(release): v0.13.0

Android plays and downloads the original file — Dolby and DTS audio decode
on the device — and offline mode no longer needs the network.

CHANGELOG.md

@@ -9,6 +9,48 @@ generated trace matrix lives in [docs/traceability.md](docs/traceability.md).
 For how long each fixed defect had been shipping before it was found, see
 [docs/defect-windows.md](docs/defect-windows.md).
 
+## v0.13.0
+
+Android plays and downloads the original file, and offline mode works without
+a network. Found on a tablet with no Dolby decoder, where nearly every film was
+being transcoded by the server — slowly, and unresumably — just for its audio.
+
+### ✨ Features
+
+- **Dolby and DTS audio play on every Android device.** Android ships no AC-3,
+  E-AC-3, DTS or TrueHD decoders — they exist only where a manufacturer paid for
+  them. The player now decodes them itself (FFmpeg), so these films stream and
+  download as the original file instead of a server transcode: direct play when
+  streaming, and a download that runs at full speed, shows a real percentage,
+  and resumes after a dropped connection. Measured: a 910 MB E-AC-3 5.1 episode
+  in 94 seconds, where a transcode managed about 1 MB/s. (DR-293)
+
+### 🐛 Fixes
+
+- **Downloaded films play offline.** Playing a download asked the server for
+  details it did not need, so with no network it waited seven seconds, failed,
+  and never opened the file on disk. It now answers from the download itself.
+  (DR-294)
+- **"Failed to load item" offline.** Opening a downloaded show's details could
+  fail while the app was writing to its database (the catalog sync at every
+  launch, a download finishing): the cached answer was thrown away for being
+  slow, and the server — unreachable — was reported instead. The library list,
+  genres, playlists, search and favourites had the same flaw. They now wait for
+  the cache. (DR-294)
+- **The TV page no longer blanks offline.** Its "Next Up" row was server-only,
+  and its failure took the whole page with it. It now falls back to the cache.
+  (DR-294)
+
+### 🔧 Changes
+
+- **Native video is no longer optional on Android.** The built-in web player
+  cannot decode Dolby or DTS audio, so with original files downloaded it would
+  play them silent. The "Native Video" switch is gone from Android settings (it
+  remains on Linux, beside mpv native video).
+- **Licence.** The Android app now bundles a GPL-3.0 component (the FFmpeg audio
+  decoder), so the distributed APK carries GPL-3.0 terms; JellyTau's source stays
+  MIT. See `THIRD_PARTY_NOTICES.md`.
+
 ## v0.12.2
 
 Two download fixes, found together on a tablet whose films all needed their