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>

landing/src/pages/[...lang].astro

@@ -4,7 +4,7 @@ import { ui, LANGS, LANG_LABEL, LANG_PATH, type Lang } from "../i18n/ui";
 import Creeper from "../components/Creeper.astro";
 import PixelIcon from "../components/PixelIcon.astro";
 import CopyChip from "../components/CopyChip.astro";
-import ServerListPanel from "../components/ServerListPanel.astro";
+import ServerCard from "../components/ServerCard.astro";
 import "../styles/main.css";
 
 // One static page per locale: en at "/", es at "/es/", eu at "/eu/".
@@ -108,7 +108,7 @@ const dustBits = Array.from({ length: 16 }, (_, i) => {
             </div>
           </div>
           <div class="hero-status">
-            <ServerListPanel
+            <ServerCard
               modded={t.status.modded}
               motd={t.status.motd}
               upTo={t.status.upTo}
@@ -126,7 +126,7 @@ const dustBits = Array.from({ length: 16 }, (_, i) => {
             <p class="lead">{t.status.lead}</p>
           </div>
           <div class="reveal">
-            <ServerListPanel
+            <ServerCard
               modded={t.status.modded}
               motd={t.status.motd}
               upTo={t.status.upTo}