Downloads were using direct YouTube CDN URLs even when proxiesVideos
was enabled. Apply the same proxyStreamsIfNeeded used by the player
to the download code path in ContentService.
Malformed items in relatedStreams (e.g., missing title) no longer crash
the entire JSON decode. Reuses the existing PipedVideoItem (renamed from
PipedPlaylistItem) graceful-decoding wrapper for all relatedStreams arrays
in PipedStreamResponse, PipedChannelResponse, and PipedNextPageResponse.
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.
Use URLComponents/URLQueryItem for standard form-URL encoding instead
of manual percent-encoding with CharacterSet.alphanumerics, which
included non-ASCII Unicode letters and had an unsafe raw-value fallback.
Playlists only loaded the first page of videos. Add full pagination for
both Invidious and Piped playlist endpoints (public and authenticated).
Deduplicate Invidious results by playlist index to handle its overlapping
page windows. Also fix URL encoding in Invidious login to use strict
form-encoding charset.
