chore: cut v0.5.1 release

changes/task-117.1.md

@@ -1,4 +0,0 @@
-type: fixed
-area: launcher
-
-- Hardened YouTube AI subtitle fixing so fenced SRT output and text-only one-cue-per-block responses can still be applied without losing original cue timing.

changes/task-127.md

@@ -1,4 +0,0 @@
-type: fixed
-area: launcher
-
-- Skipped AniSkip lookup during URL playback and YouTube subtitle-preload playback, limiting AniSkip to local file targets where it can actually resolve anime metadata.

changes/task-130.md

@@ -1,5 +0,0 @@
-type: fixed
-area: launcher
-
-- Keep the background SubMiner process running after a launcher-managed mpv session exits so the next mpv instance can reconnect without restarting the app.
-- Reuse prior tokenization readiness after the background app is already warm so reopening a video does not pause again waiting for duplicate warmup completion.

changes/windows-background-reuse.md

@@ -1,4 +0,0 @@
-type: fixed
-area: windows
-
-- Acquire the app single-instance lock earlier so Windows overlay/video launches reuse the running background SubMiner process instead of booting a second full app and repeating startup warmups.

changes/youtube-single-flow.md

@@ -1,4 +0,0 @@
-type: changed
-area: launcher
-
-- Removed the YouTube subtitle generation mode switch so YouTube playback always preloads subtitles before mpv starts.