PR infographics are decorative visual hooks for a PR body, not repo
artifacts. The established convention (commit 5772e638c, "chore: drop
in-repo infographic/ directory; keep PR-body URLs only", #30854) is to
hotlink an externally-hosted image so GitHub camo-proxies it inline,
leaving zero binary footprint in the tree.
Two such assets had been committed anyway and are referenced nowhere in
the codebase:
- docs/assets/ns504-chat-session-reconnect.png (1024-equiv, NS-504 PR
infographic, added in #47674 alongside the ChatPage.tsx fix)
- infographic/kanban-db-corruption-defense/infographic.png (re-added a
directory #30854 had explicitly removed, in #30952)
Both are unreferenced decorative infographics, so removing them has no
effect on docs, website, or app builds. Removing the latter also clears
the stray top-level infographic/ directory that #30854 had retired.
These blobs remain in history (the commits that introduced them are
already on main and bundled with real code, so they can't be dropped);
this just removes them from the working tree going forward.