Add container summary on card face, fix df parsing for wrapped lines, collect OS info, faster startup and refresh

app/static/style.css

@@ -327,6 +327,63 @@ main {
     color: #475569;
 }
 
+/* --- Container Summary (on card face) --- */
+
+.ct-summary-list {
+    margin-top: 10px;
+    padding-top: 8px;
+    border-top: 1px solid #334155;
+    display: flex;
+    flex-direction: column;
+    gap: 3px;
+}
+
+.ct-summary-item {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    font-size: 0.7rem;
+    color: #94a3b8;
+    overflow: hidden;
+}
+
+.status-dot-sm {
+    width: 5px;
+    height: 5px;
+    border-radius: 50%;
+    flex-shrink: 0;
+}
+
+.status-dot-sm.online {
+    background: #22c55e;
+}
+
+.status-dot-sm.offline {
+    background: #ef4444;
+}
+
+.ct-summary-name {
+    font-weight: 600;
+    color: #cbd5e1;
+    white-space: nowrap;
+}
+
+.ct-summary-os {
+    color: #64748b;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.ct-summary-ip {
+    color: #64748b;
+    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
+    font-size: 0.65rem;
+    white-space: nowrap;
+    margin-left: auto;
+    flex-shrink: 0;
+}
+
 /* --- Container / VM Sub-cards --- */
 
 .container-grid {