feat: add opening/ending autoskip and correct sponsor hover anchors

Sponsor hover labels used the overlapping chapter midpoint; retain chapter-title lookup but anchor the label to the sponsored range midpoint.

README.md

@@ -26,8 +26,8 @@ To run without installing, use `make run`. The built `.build/terebi.app` is self
 - **Stream queues:** integrations can supply an ordered yt-dlp/Miruro queue with `--new-instance --queue-file /absolute/queue.json`, or append without interrupting the running player using `--enqueue --queue-file /absolute/queue.json` (also for a single item). Enqueue starts playback if the player is empty or not running. The same sidebar supports play, reorder, remove, previous/next and automatic advance. Unresolved titles, including the selected row, load serially at lower priority without waiting for playback loading, buffering or quality extraction. YouTube uses a title-only oEmbed request; other sites use yt-dlp metadata and Miruro uses optional episode metadata. Arrival still depends on the site/network; failed lookups retain the supplied label, and full playback metadata takes precedence. Playback sources still resolve fresh when selected or revisited; local-file batches still use natural filename order. yt-dlp items use the original page URL for resume and version-1 progress reports; recognized YouTube video URLs still canonicalize.
 - **Seeking:** click or drag the progress track or thumb to seek. The thumb centers on the cursor, clamped to the track endpoints. While mouse-seeking, the segment under the thumb smoothly thickens and returns to normal on release. Hovering a named segment fades its title in above the segment's center. Reduce Motion disables these transitions.
 - **YouTube chapters:** when yt-dlp provides usable chapters, small rounded gaps mark their boundaries in the playback track. Boundaries use the current player's duration; missing or malformed chapter data leaves ordinary playback unchanged. Chapters do not add opening/ending skip buttons. Availability varies, and description-derived timestamps may differ from YouTube's displayed chapters.
-- **Sponsored ranges:** optional [SponsorBlock](https://sponsor.ajay.app/) sponsor/skip ranges paint the existing track crimson without adding chapter boundaries or changing chapter gaps. Hover shows **Sponsor** alongside any chapter title; accessibility also identifies sponsored ranges. Inside a range, **Skip Sponsor** uses the opening/ending button without a timeout or countdown fill. Clicking seeks to the range's end; automatic skipping is a separate opt-in.
-- **Miruro metadata:** titles and opening/ending intervals load independently of playback when available. Small rounded gaps mark interval boundaries in the slider. Inside a segment, **Skip Opening** or **Skip Ending** appears at the top-right below the titlebar for up to ten seconds or until the segment ends; clicking seeks to its end. A light background fill grows as the offer expires, with a short entrance/exit transition; Reduce Motion uses stepped countdown updates without the transition. Ignored offers stay dismissed until the media is closed or replaced. Missing/invalid metadata leaves playback usable, and timings may differ between cuts. Nothing skips automatically.
+- **Sponsored ranges:** optional [SponsorBlock](https://sponsor.ajay.app/) sponsor/skip ranges paint the existing track crimson without adding chapter boundaries or changing chapter gaps. Hover shows **Sponsor** alongside any chapter title, centered over the sponsored range itself even when it crosses chapter boundaries; accessibility also identifies sponsored ranges. Inside a range, **Skip Sponsor** uses the opening/ending button without a timeout or countdown fill. Clicking seeks to the range's end; automatic skipping is a separate opt-in.
+- **Miruro metadata:** titles and opening/ending intervals load independently of playback when available. Small rounded gaps mark interval boundaries in the slider. Inside a segment, **Skip Opening** or **Skip Ending** appears at the top-right below the titlebar for up to ten seconds or until the segment ends; clicking seeks to its end. A light background fill grows as the offer expires, with a short entrance/exit transition; Reduce Motion uses stepped countdown updates without the transition. Ignored offers stay dismissed until the media is closed or replaced. Missing/invalid metadata leaves playback usable, and timings may differ between cuts. Automatic skipping is configurable below.
 - **Resume:** videos resume their saved position; finished videos restart from the beginning. Live and audio-only media do not save progress.
 - **Compact mode:** press **P** for a floating player; double-click it to restore. Drag noninteractive areas to move the window. The queue starts hidden each time you enter compact mode; **⇧⌘L** or **gear → Show Queue** expands it below the video. Its top fade has a 12-point solid section and a 20-point transition, with the first row starting below both. The same shortcut toggles the normal sidebar, whose visibility is preserved when leaving compact mode. Use the titlebar pin to keep the normal window on top.
 - **Quality:** yt-dlp defaults to SDR up to 1080p when resolution is reported. Missing resolution/codec hints are left to native probing. Use **gear → Quality** for other reported resolutions or automatic quality.
@@ -106,10 +106,21 @@ The optional config file is `~/.config/terebi/config.toml`, or `$XDG_CONFIG_HOME
 terebi --default-config
 ```
 
-Copy the settings you want to change into the config file; omitted settings keep their defaults. Settings load at startup, so restart the player after editing. Menu changes are session-only except the SponsorBlock toggles, whose saved preferences override their startup config settings.
+Copy the settings you want to change into the config file; omitted settings keep their defaults. Settings load at startup, so restart the player after editing. Menu changes are session-only except the SponsorBlock and opening/ending autoskip toggles, whose saved preferences override their startup config settings.
 
 The queue shortcut can be rebound with `show_queue` and `hide_queue` under `[keys]`; give both actions the same chord to keep a single toggle.
 
+### Opening/ending autoskip
+
+**Playback → Automatically Skip Openings and Endings**, also available in the player's gear menu, skips valid opening/ending intervals to their exact ends. It is **off by default**, independent of SponsorBlock, and saved across launches. Without a saved preference, this startup setting applies:
+
+```toml
+[playback]
+opening_ending_autoskip = true
+```
+
+Use `false` or omit the setting to keep automatic skipping disabled; non-boolean values are rejected. Autoskip runs only during playing, nonbuffering video playback, never while paused or a seek is pending. Seeking into an interval or up to **five seconds before its start** keeps it manual-only for that visit, including when metadata arrives later. Quality changes preserve that intent; saved-position restoration gets the same protection. The existing timed manual buttons remain available when autoskip is suppressed. No interval metadata means no automatic skip.
+
 ### SponsorBlock
 
 SponsorBlock and automatic sponsor skipping are **off by default**. **Playback → SponsorBlock → Show Sponsored Ranges** enables lookups, markers and manual skipping; **Automatically Skip Sponsors** separately opts into automatic skipping. Both choices are saved across launches. Saved choices override their respective config settings; without them, the startup settings apply:
@@ -161,7 +172,7 @@ Install FFmpeg for test fixtures (`brew install ffmpeg`), then run `make check`.
 
 For the focused native compact-queue smoke (transparent, noninteractive app window), run `TEREBI_CHECK_COMPACT_QUEUE_ONLY=1 make check-startup`. `make check-window check-config` covers dropdown geometry, resizing, metadata aspect changes, restoration and configurable queue shortcuts without displaying windows.
 
-`make check-sponsorblock` exercises the bounded native lookup and duration validation with local fixtures; `.build/sponsorblock-check --live` performs read-only public API probes. `make check-resolved` includes persistent manual sponsor skips, native autoskip, deliberate relative/slider seek protection, saved preferences, opt-in/failure isolation, same-video cancellation, direct/saved/queue/enqueue launches, quality changes and Miruro separation. The native slider regression (`.build/cast-playback-check --slider-regression`, after building that target) checks crimson painting across chapter gaps, buffering, active emphasis, hover and seeking.
+`make check-sponsorblock` exercises the bounded native lookup and duration validation with local fixtures; `.build/sponsorblock-check --live` performs read-only public API probes. `make check-resolved` includes persistent manual sponsor skips, native sponsor/opening/ending autoskip, deliberate relative/slider seek protection, paused/late metadata, saved preferences, opt-in/failure isolation, same-video cancellation, direct/saved/queue/enqueue launches, quality changes and Miruro separation. The native slider regression (`.build/cast-playback-check --slider-regression`, after building that target) checks crimson painting across chapter gaps, sponsor-centered hover anchors, buffering, active emphasis and seeking.
 `make check-zoko check-reporting check-cli check-stream check-progress` covers provider admission/codec/error categories, bounded resources, scoped CDN policy, isolated resume and report identity without launching a GUI. Optional `make check-zoko-live` resolves current AniList 1 episode 1, loads VTT, and uses the **actual native player** while paused to decode/step video, seek/decode at 600 seconds, restore position and assert version-2 AniList progress. It creates no windows and does not start audio playback, but production Core Audio still initializes an output device. No tokenized addresses are printed or retained after the check. This is not a full-episode, audio-output, pixel/subtitle-rendering or UI smoke test, nor proof of availability for other catalog entries. Full `make check` still launches GUI/audio checks.
 
 `make check-source` exercises the public parser/result contract, error redaction, shared manifest validation, total deadline/cancellation and actual CLI rejection paths without GUI/audio or native-player linking. Optional `make check-source-live` runs the **actual CLI**, copied outside its app bundle with an intentionally invalid configuration and isolated state directories: Cowboy Bebop, Black Clover episodes 1/170 and Black Clover Season 2 episode 1 must resolve through their exact MAL mappings, while Cowboy Bebop episode 27 remains `unavailable`, with no state writes. These source-only probes fetch no segments and are distinct from `check-zoko-live`'s native playback checks. `.build/zoko-check --live-black-clover` exercises native decoding, ten-minute seek, subtitles, resume and original AniList progress identity for Black Clover.