Not so long ago I migrated from Gitlab to Gitea and as part of that I made some tools to help work with KiCad files:
Just wanted to share here in case others were looking for a similar solution.
When clicking a schematic file it loads an SVG version (with pan & zoom support). Subsequent openings should be faster (cached).
PCB files are shown as very basic front & back view. Some more fancy viewer shouldn’t be too hard to integrate.