chore(release): 0.59.1 — release-note correction + first jsdom test lane (chores only)

VERSION

@@ -1 +1 @@
-0.59.0
+0.59.1

frontend/src/lib/releaseNotes.ts

@@ -14,6 +14,14 @@ export interface ReleaseEntry {
 }
 
 export const RELEASE_NOTES: ReleaseEntry[] = [
+  {
+    version: "0.59.1",
+    date: "2026-08-06",
+    chores: [
+      "Corrected a past release note: the 0.57.0 entry no longer claims background audio for shared videos on iPhone/iPad — that never worked and the attempt was dropped.",
+      "Added the project's first browser-environment unit-test lane and used it to cover the player's nested Back/Escape (fullscreen → maximise → close) behaviour — internal test tooling only.",
+    ],
+  },
   {
     version: "0.59.0",
     date: "2026-07-31",