channel page is now 3 pages, should be more stable

[bmdavis419]

Greptile Summary

This PR refactors the channel page from a single page with client-side tabs into 3 separate routes (/overview, /last7days, /sponsors) using a shared layout. This architectural change should improve data fetching stability by allowing each route to independently load its data.

Key Changes:

• Split single-page component with tab state into layout + 3 child routes
• Old /app/view/channel now redirects to /app/view/channel/overview for backward compatibility
• Added pagination to ChannelVideos component (20 videos per page)
• New ChannelSponsorMentions component displays sponsor mentions from comments
• Updated all internal links to point to /overview route
• Database layer now returns {videos, totalCount} for pagination support

Data Fetching Improvements:

• Each route now independently fetches its data
• Removed client-side tab switching that loaded all data upfront
• Videos component now uses server-side pagination

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• Well-structured refactoring that splits a single-page channel view into 3 separate routes using SvelteKit's layout system. All route references are consistently updated across the codebase. The redirect in the old route maintains backward compatibility.
• No files require special attention

Important Files Changed

Filename	Overview
apps/web/src/routes/app/view/channel/+page.svelte	Converted to redirect page that forwards to /overview route, maintains backward compatibility
apps/web/src/routes/app/view/channel/+layout.svelte	New layout file with tab navigation for Overview, Last 7 Days, and Sponsors sections
apps/web/src/lib/components/ChannelVideos.svelte	Added pagination with currentPage state, page size 20, removed max-height scroll container
apps/web/src/lib/remote/channels.remote.ts	Updated remoteGetChannelVideos to accept page/pageSize, added remoteGetChannelSponsorMentions
apps/web/src/lib/services/db.ts	getChannelVideos now returns {videos, totalCount}, added offset param and getChannelSponsorMentions method