Add multi-disk copy workflow

web/static/style.css

@@ -89,6 +89,24 @@ a:hover { text-decoration: underline; }
   color: var(--ink);
 }
 
+.panel-body {
+  padding: 14px 16px;
+}
+
+.disk-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
+  gap: 20px;
+}
+
+.disk-card {
+  margin-bottom: 0;
+}
+
+.progress-wrap {
+  border-top: 1px solid var(--border-lite);
+}
+
 /* KV table */
 .kv-table {
   width: 100%;
@@ -325,5 +343,7 @@ a:hover { text-decoration: underline; }
 @media (max-width: 720px) {
   .page-header { flex-wrap: wrap; padding: 12px 16px; }
   .page-main { width: calc(100vw - 24px); margin-top: 20px; }
+  .disk-grid { grid-template-columns: 1fr; }
   .kv-table th { width: 130px; }
+  .btn-row { flex-wrap: wrap; }
 }