feat(landing): live server card backed by self-hosted mc-status

Add a featured live ServerCard to the landing (replaces the static
ServerListPanel in hero + status sections): server favicon, color MOTD,
online/offline pill, players online/max with fill bar, and a player-head
row rendered by our own NMSR from Drasl skins. Progressive enhancement —
SSG skeleton degrades gracefully when JS or the API is unavailable.

Back it with a self-hosted pinger instead of the public api.mcstatus.io:
mcstatus.io's API service is closed-source (only the mcutil library is
open), so docker/mc-status wraps mcutil and re-emits its v2 JSON shape,
keeping the frontend unchanged. The service ignores the path address and
only pings MC_STATUS_TARGET (no SSRF relay), with a 30s TTL cache.

Exposed same-origin via caddy at the apex /api/mcstatus/* path (no new DNS
subdomain or LE cert change, no CORS). Uptime Kuma stays the uptime
history + alerting backend; see plan/15-mc-status.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

caddy/conf.d/10-static.caddy

@@ -6,6 +6,13 @@ http://{$BASE_DOMAIN} {
 		root * /srv/launcher
 		file_server browse
 	}
+	# Self-hosted Minecraft status JSON (mc-status service). Same-origin, so the
+	# landing's ServerCard fetch needs no CORS. The <addr> in the path is
+	# ignored by mc-status — it only ever pings its configured MC_STATUS_TARGET.
+	handle /api/mcstatus/* {
+		uri strip_prefix /api/mcstatus
+		reverse_proxy mc-status:8080
+	}
 	handle {
 		root * /srv/www
 		file_server