monitor : temp GPU, conso watts, espace disque, heartbeat dispatcher

- nvidia-smi : +temperature.gpu + power.draw
- UI : tags °C / W / espace disque libre
- Dispatcher heartbeat toutes les 4s → point vert/rouge en haut du monitor
- Fix Docker SSH : copie + chmod 600 au démarrage (Bad owner)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/static/style.css

@@ -90,6 +90,18 @@ button.mini { padding: 0 0.4rem; font-size: 0.75rem; line-height: 1.4; }
 
 @keyframes spin { to { transform: rotate(360deg); } }
 
+.monitor-header { margin-bottom: 0.75rem; }
+.dispatcher-status { display: inline-flex; align-items: center; gap: 0.4rem;
+  font-size: 0.8rem; color: var(--muted); }
+.dispatcher-status .dot { width: 8px; height: 8px; border-radius: 50%;
+  background: var(--err); flex-shrink: 0; }
+.dispatcher-status.alive .dot { background: var(--ok); }
+.dispatcher-status.alive { color: var(--ok); }
+.worker-meta { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 0.35rem; }
+.tag { font-size: 0.75rem; padding: 0.1rem 0.35rem; border-radius: 4px;
+  background: rgba(255,255,255,0.05); color: var(--text); }
+.tag.warn { color: var(--warn); }
+
 button { background: transparent; color: var(--accent); border: 1px solid var(--border);
   padding: 0.2rem 0.6rem; border-radius: 6px; cursor: pointer; font-family: inherit; font-size: 0.75rem; }
 button:hover { border-color: var(--accent); }