对话框加入关闭按钮，统一用户体验

popup.css

@@ -981,6 +981,30 @@ h2 {
   width: 100%;
   max-width: 360px;
   box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
+  position: relative;
+}
+
+.modal-close {
+  position: absolute;
+  top: 8px;
+  right: 10px;
+  background: none;
+  border: none;
+  color: #888;
+  font-size: 18px;
+  cursor: pointer;
+  line-height: 1;
+  padding: 2px 6px;
+  border-radius: 4px;
+}
+
+.modal-close:hover {
+  color: #e94560;
+  background: rgba(233, 69, 96, 0.1);
+}
+
+.btn-block {
+  width: 100%;
 }
 
 .modal-content h3 {
@@ -1100,12 +1124,12 @@ h2 {
 
 .env-manage-actions {
   display: flex;
-  gap: 6px;
+  gap: 2px;
+  margin-right: -8px;
 }
 
 .env-manage-actions button {
-  padding: 4px 10px;
-  font-size: 12px;
+  padding: 4px 6px;
 }
 
 .env-manage-empty {