Streamline admin reply composer

public/admin.css

@@ -487,24 +487,44 @@ label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
   background: white;
   border-top: 1px solid var(--line);
 }
+.reply.dragging {
+  box-shadow: inset 0 0 0 2px var(--brand);
+  background: #edf8f3;
+}
 .reply-composer {
   display: grid;
-  grid-template-columns: minmax(0, 1fr) auto;
-  gap: 10px;
+  grid-template-columns: minmax(0, 1fr) 44px 48px;
+  gap: 8px;
+  align-items: stretch;
 }
-.admin-dropzone {
-  min-height: 38px;
-  border: 1px dashed var(--line);
-  border-radius: 8px;
-  padding: 8px 10px;
-  display: flex;
-  align-items: center;
-  color: var(--muted);
-  background: #f8fbf9;
+.reply-composer textarea { min-height: 72px; resize: vertical; }
+.reply-icon-button {
+  min-height: 72px;
+  width: 100%;
+  display: grid;
+  place-items: center;
+  border-radius: 6px;
+  padding: 0;
   cursor: pointer;
 }
-.admin-dropzone.dragging { border-color: var(--brand); background: #edf8f3; color: var(--ink); }
-.admin-dropzone input { display: none; }
+.reply-icon-button svg {
+  width: 21px;
+  height: 21px;
+  fill: currentColor;
+}
+.attach-button {
+  border: 1px solid var(--line);
+  background: #f8fbf9;
+  color: var(--muted);
+}
+.attach-button:hover { background: #edf3ef; color: var(--ink); }
+.attach-button input { display: none; }
+.send-button {
+  border: 0;
+  background: var(--brand);
+  color: white;
+}
+.send-button svg { transform: translateX(1px); }
 .reply-attachments {
   display: flex;
   flex-wrap: wrap;