* fix(p2p stats): improve own-IP geolocation and world map accuracy
Resolve the user's public endpoint when libp2p only advertises private listen addresses, look up an accurate country flag for "Your IP", snap peer markers to country centroids, and add leeching seeder link plus panel layout tweaks.
* fix(p2p stats): skip caching own-IP lookups cancelled by abort
When the P2P stats panel unmounts mid-request, its AbortSignal cancels
the in-flight fetchOwnPublicEndpoint / fetchOwnIpCountryCode calls. Those
empty results were still cached for 30-60s, so reopening the panel within
that window showed "Your IP" as unavailable or without a country flag even
though nothing had actually failed. Skip caching when the signal aborted so
a later open retries. Addresses Cursor Bugbot finding.
Restyle the connected-peers list in the classic square, flat imageboard style,
move it to the end of the panel, and open it by default. Add an offline
approximate world map and per-peer country flags (sprite order taken from the
original 4chan flags.css), plus codify the old-school design rules in DESIGN.md
and point agents to them from AGENTS.md.
