chore(release): v0.13.2

A series opens with its episodes in under a second: the episode list no
longer waits on the server, a page loads once instead of six times, and
the local database finds a container's children by index.

CHANGELOG.md

@@ -9,6 +9,33 @@ 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).
 
+## v0.13.2
+
+A series opens with its episodes in under a second. v0.13.1 fixed the season
+list; the episode list below it still took about five seconds on a Fairphone.
+
+### ⚡ Performance
+
+- **The episode list no longer waits for the server.** It used to wait for
+  "Next Up" and your resume point, fetched from the server first, although every
+  episode was already on the device. The list now shows as soon as it is
+  loaded, and Next Up answers from the device first like everything else.
+  (DR-101, DR-295)
+- **A page loads once.** Opening a series loaded it six times over, putting
+  about seventy requests in flight at once. It now loads once, and re-loads only
+  when something actually changed (reconnecting, marking watched). (DR-295)
+- **The local database finds things by index instead of reading everything.**
+  Each item now records the one container it is listed under, so a series,
+  season or album page is a single index lookup — under a millisecond on a
+  100,000-item library, where it used to scan the whole catalogue. The update
+  converts an existing library in well under a second, once. (DR-012, DR-013)
+
+### 🐛 Fixes
+
+- **A series lists its seasons, not every episode as well.** Both the library
+  view and the Downloads view mixed a series' episodes in with its seasons.
+  (DR-013)
+
 ## v0.13.1
 
 Pages answer from the cache again. Found on a Fairphone, where opening a