feat(action): direct accept/reject buttons — no mirror tab needed, Extension /api/action endpoint

public/css/style.css

@@ -526,6 +526,19 @@ body {
   background: var(--accent-primary);
 }
 
+.msg-action-danger {
+  background: #ef4444;
+}
+
+.msg-action-danger:hover {
+  background: #dc2626;
+}
+
+.msg-action-btn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
 /* --- 상태 메시지 --- */
 .msg-status {
   text-align: center;