Add a live P2Pool mining section to the homepage

A new #mining section invites visitors to mine on p2pool.eom.dev and shows
live node/sidechain/network hashrate, connected miners and shares from the
same-origin /p2pool/stats.json summary published by ansible-role-monero.
The stats load progressively: static placeholders and join instructions
remain when the endpoint is unavailable (including in the local preview
and on the onion mirror).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018STDcc5BaYxPMNA9S8Wycs

htdocs/static/home.css

@@ -1038,6 +1038,37 @@ main {
     }
 }
 
+.mining-stats {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
+    gap: 1rem;
+    margin: 0 0 1rem;
+}
+
+.mining-stats > div {
+    padding: 1rem 1.15rem;
+    border: 1px solid var(--border);
+    border-radius: 1rem;
+    background: var(--surface);
+}
+
+.mining-stats dt {
+    color: var(--muted);
+    font-size: 0.82rem;
+}
+
+.mining-stats dd {
+    margin: 0.2rem 0 0;
+    color: var(--text);
+    font-size: 1.35rem;
+    font-weight: 700;
+    font-variant-numeric: tabular-nums;
+}
+
+.mining-section .project-grid {
+    margin-top: 1.5rem;
+}
+
 @media (prefers-reduced-motion: reduce) {
     *,
     *::before,