yattee-server returns direct YouTube CDN URLs in the storyboard `url`
and `templateUrl` fields instead of an Invidious-style VTT proxy path.
Two resulting issues:
- `Storyboard.directSheetURL` was replacing the whole `M$M` token with
just the index, producing `.../0.jpg` (404) instead of `.../M0.jpg`.
Replace `M$M` with `M\(index)` to preserve the literal `M` prefix;
matching the full token also avoids clobbering `$M` sequences that
may appear in `sigh=rs$...` query params.
- The download code fetched `proxyUrl` as if it were a WebVTT file;
with yattee-server that downloads a JPEG that fails UTF-8 parsing.
Skip the VTT round-trip when `proxyUrl` obviously points at an image.
Also align the on-disk filename with the local-playback template
(`sb_M$M.jpg` → `sb_M{N}.jpg`) so offline seek-bar previews resolve,
and add [Storyboard] debug logs at each decision point so future
failures can be diagnosed without guessing.
After disabling home shortcuts on tvOS, Open URL and Remote Control had
no entry point. Add them as configurable sidebar main items. Remote
Control defaults to visible on tvOS; Open URL defaults to hidden on all
platforms.
Preserve user:pass credentials in instance URLs so Invidious instances
behind nginx reverse proxies with HTTP basic auth work correctly (#926).
Add displayURL property to mask credentials in the UI.
Adds a "Proxy videos" toggle in instance settings that routes video
streams through the instance instead of connecting directly to YouTube
CDN. Includes auto-detection of 403 blocks and live re-application of
proxy settings without requiring app restart or video reload.
The filter strip was passing the Invidious instance URL as serverURL to
AvatarURLBuilder, which built a Yattee Server-style /avatar/ path that
doesn't exist on Invidious. Now passes the actual Yattee Server URL
(matching SubscriptionsView pattern) and enriches channels from
CachedChannelData as a fallback when the API doesn't return thumbnails.
Back the in-memory authorCache with a JSON file in ~/Library/Caches/AuthorCache/.
Disk is lazy-loaded on first lookup and saved asynchronously on each cache update.
Capped at 500 entries to prevent unbounded growth.
- Cache author data from video detail API responses (PlayerService, VideoInfoView)
- Replace ChannelView's private CachedChannelHeader with shared CachedChannelData
- Enrich author with cached avatar/subscriber count in VideoChannelRow, TVDetailsPanel, VideoInfoView
