fix(channel): fix shorts/streams pagination using continuation tokens

- Add continuation_token_cache to store ctokens between page requests
- Use cached ctoken for page 2+ instead of generating fresh tokens
- Switch shorts/streams to Next/Previous buttons (no page numbers)
- Show "N+ videos" indicator when more pages are available
- Fix UnboundLocalError when page_call was undefined for shorts/streams

The issue was that YouTube's InnerTube API requires continuation tokens
for pagination on shorts/streams tabs, but the code was generating a new
ctoken each time, always returning the same 30 videos.

0 files changed, 0 insertions, 0 deletions