feat: expand subtitle and media tracking workflows

- Add reference-guided subtitle timing, frame picking, live-action Jimaku search, and YouTube library kinds
- Harden Jellyfin media identity handling and live settings feedback
- Refresh user-facing documentation and changelog fragments

changes/anime-browser.md

@@ -19,7 +19,7 @@ area: anime
 - The strip proxy retries a failed segment fetch once after a short pause and logs upstream error statuses; a host that errors on the very first fetches right after an episode resolves no longer kills the whole playback, disconnecting clients release their active upstream fetch instead of consuming the socket and bandwidth in the background, stalled response bodies retain the upstream inactivity timeout, and only origin-form requests can reach the configured local bridge.
 - The strip proxy no longer forwards `Range` headers to the bridge: ffmpeg opens every HLS segment with `Range: bytes=0-`, the bridge answers some of those with 206, and a partial response bypassed the disguise strip, so whether an episode played depended on the bridge's cache state.
 - A bridge that dies out from under the app (killed, crashed, or stopped mid-operation) no longer leaves the browser failing every request until an app restart: the exit is detected, surfaced in the status bar, and the bridge restarts on the next request.
-- "Playing" is only reported once mpv actually configures a video output; when a stream fails to decode, the browser shows mpv's error instead of claiming playback started while no window ever appeared.
+- "Playing" is only reported once mpv actually configures a video output; slow streams remain loading while mpv opens them, and failed streams show mpv's error.
 - The bridge bundle is downloaded from the newest upstream release that ships a bundle for the platform (skipping releases older than the oldest server SubMiner is known to work with), the same way Mangatan fetches it, so all four published bundles (macOS arm64 and x64, Linux x64, Windows x64) work without a maintainer hashing each one first.
 - The Extensions tab's available list has a language chip row: pick one or more languages to narrow a repository index that otherwise lists every language it knows, or "All" to clear the filter. Rows name the language ("Japanese" instead of `ja`) and the Available heading counts what the filter leaves.
 - A stream's subtitle tracks are downloaded to a temp directory and loaded into mpv as files rather than streamed from the source URL, so they can serve as the alass reference in Subsync the way Jellyfin subtitles do. The format is detected from the file's own content, a track that fails to download falls back to its URL so the episode still plays, and the directory is removed when the next episode starts or the app exits.

changes/anime-playback-loading-docs.md

@@ -0,0 +1,4 @@
+type: docs
+area: anime
+
+- Document how the anime browser waits for slow streams to start without reporting a premature playback failure.

changes/fix-jellyfin-media-identity.md

@@ -0,0 +1,7 @@
+type: fixed
+area: jellyfin
+
+- Set the mpv title before loading Jellyfin streams and reject URL-derived titles from metadata lookups, Anki source fields, Discord presence, and stats.
+- Keep authenticated stream URLs out of stats identities even when playback metadata has not arrived.
+- Remove previously cached credential-bearing Jellyfin stream parser metadata without changing unrelated anime metadata, watch history, or library assignments.
+- Use safe media identities for persisted AniList retry keys, discard URL-derived queued searches, and skip updates and retries whose media identity is empty.

changes/japanese-subtitle-generation-docs.md

@@ -2,3 +2,4 @@ type: docs
 area: subtitles
 
 - Explain how dialogue generation retains uncertain audible sections, why songs may also be transcribed, how detected speech starts guide long-passage cuts to reduce early subtitles, and why each passage uses a fresh Whisper process.
+- Document automatic loaded subtitle references, English dialogue preference, signs/songs filtering, fallback behavior, and the limits of reference-guided timing.

changes/japanese-subtitle-generation.md

@@ -4,3 +4,5 @@ area: subtitles
 - Generate local Japanese SRT subtitles with whisper.cpp from a standalone modal opened with Ctrl+Shift+G, the empty subtitle sidebar's generation button, or `subminer generate-subs`, with shared progress reporting, cancellation, safe output files, and automatic loading into the matching mpv video. The sidebar button hides while subtitle lines are loaded.
 - Configure an existing multilingual model in Settings or choose an official multilingual model, including quantized variants, in the modal or launcher. The modal shows download sizes, speed and accuracy guidance, and a recommended starting model before explicitly downloading a verified SubMiner-managed model. Executable paths are optional overrides; empty fields find whisper-cli, ffmpeg, and ffprobe on PATH. The modal's Local tools check and the launcher name any missing executable and its setting before downloading a model or extracting audio, and generation confirms the destination directory grants write and search permissions up front.
 - Optionally select Focus on spoken dialogue in the modal and use Download speech detection model to install the separate Silero model with progress and cancellation. The choice lasts for the session; a configured VAD model path sets the default. Retain uncertain audible sections so VAD rejection does not discard dialogue under music, accepting that songs may also be transcribed. Keep passages intact within Whisper's audio window, split longer passages near detected speech starts or quiet pauses with overlapping context to reduce early subtitle timing, and combine overlapping duplicate cues even when punctuation differs. Run each passage in a fresh Whisper process to prevent repeated-character output caused by state carried between files, at the cost of reloading the model per passage. Preserve original media timing and separate repeated dialogue.
+- Recommend large-v3-turbo in the model picker when NVIDIA hardware and CUDA device support in the selected Whisper executable are confirmed; recommend small otherwise. Preserve configured and session model selections. Use a wider generation modal to reduce text wrapping and scrolling, while keeping it within smaller player windows.
+- Automatically use an eligible embedded or external subtitle track loaded in mpv to guide long-passage cuts, preferring English dialogue and excluding tracks marked signs, songs, forced, or generated. Honor active subtitle delays, retain unreferenced audio, and fall back to audio timing when references cannot be read. Available in the overlay and launcher, with or without VAD. The launcher captures audio selection, reference tracks, and delays before model setup so playback changes during a download do not mix inputs from different times, and rejects an unverified media snapshot before using mpv's selected audio stream.

changes/jellyfin-media-identity-docs.md

@@ -0,0 +1,5 @@
+type: docs
+area: jellyfin
+
+- Explain how Jellyfin media titles, unknown-title fallbacks, and stats identities keep stream credentials out of metadata.
+- Document AniList rejection of empty media identities and the conditions for clearing cached Jellyfin parser metadata.

changes/jimaku-live-action-search.md

@@ -0,0 +1,4 @@
+type: added
+area: jimaku
+
+- Jimaku modal gains Anime / Live action tabs so searches can pull from Jimaku's live action catalogue instead of only anime entries (Arrow Left / Right switch tabs).

changes/media-review-frame-picker-docs.md

@@ -0,0 +1,4 @@
+type: docs
+area: mining
+
+- Document independent screenshot selection in media timing review.

changes/media-review-frame-picker.md

@@ -0,0 +1,4 @@
+type: added
+area: mining
+
+- Choose a still screenshot independently of the audio in media timing review, with a live preview, a separate time slider, and decoded-frame stepping. Local video and seekable remote streams such as Jellyfin are supported.

changes/settings-live-save-feedback-docs.md

@@ -0,0 +1,4 @@
+type: docs
+area: config
+
+- Clarified live-setting save feedback, mixed restart warnings, and subtitle-generation reload behavior.

changes/settings-live-save-feedback.md

@@ -0,0 +1,5 @@
+type: fixed
+area: config
+
+- Settings marked LIVE now use the same reload policy as save results, fixing false restart warnings for notifications and subtitle generation.
+- Mixed saves apply live changes and list only sections with changed fields that require a restart.

changes/youtube-library-kind-docs.md

@@ -0,0 +1,4 @@
+type: docs
+area: stats
+
+- Document YouTube channel filtering and video statistics in the Library.

changes/youtube-library-kind.md

@@ -0,0 +1,7 @@
+type: added
+area: stats
+
+- Store YouTube channels as a separate media kind and migrate existing channel entries without changing viewing history or manual video assignments, including channels created after temporarily returning to an older build.
+- Add All Titles, Anime, and YouTube Library filters, identify channel pages, and keep channels out of AniList matching, season repair, and duplicate recommendations.
+- Keep same-title anime and YouTube records separate in storage and sync while repairing legacy channel classification.
+- Refuse merges and video moves that would mix an anime entry with a YouTube channel; the move picker and merge selection only combine entries of the same kind.