Fix DM name fallbacks and chat header

shine-UI/styles/components.css

@@ -6468,6 +6468,14 @@ html, body { overflow-x: hidden; }
   gap: 10px;
 }
 
+.dm-add-contact-card {
+  margin: 0 14px 2px;
+}
+
+.dm-add-contact-card .secondary-btn {
+  width: 100%;
+}
+
 .dm-history-loader {
   position: sticky;
   top: 0;
@@ -11378,3 +11386,17 @@ body.chat-topbar-overlay .composer-slot {
     font-size: 9px;
   }
 }
+
+/* ===== Channel list preview/time flex sizing fix (2026-09-02) =====
+ * The global .channel-row-time rule still has width:100%, which makes the
+ * timestamp consume the entire flex row and collapses the message preview.
+ * Keep the timestamp content-sized and reserve a little more room at the
+ * right edge so the final digit is never clipped by the widened list tile. */
+.channels-screen--list .channel-row {
+  padding-right: 14px !important;
+}
+
+.channels-screen--list .channel-row-preview-line .channel-row-time {
+  width: auto !important;
+  max-width: none !important;
+}