line multi authors

static/css/styles.css

@@ -4058,6 +4058,31 @@ dialog::backdrop {
   }
 }
 
+
+.editor-column-label {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+}
+
+.document-owner-badge {
+  max-width: 50%;
+  overflow: hidden;
+  padding: 2px 8px;
+  border: 1px solid color-mix(in srgb, var(--owner) 58%, transparent);
+  border-radius: 999px;
+  background: color-mix(in srgb, var(--owner) 14%, transparent);
+  color: var(--text);
+  font-size: .7rem;
+  font-weight: 600;
+  line-height: 1.35;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.document-owner-badge[hidden] { display: none; }
+
 /* Per-character authorship overlay. The textarea remains the editable surface. */
 .authorship-layer {
   position: absolute;