fix: 节点管理按钮改为两行 grid 布局，防止卡片滑动溢出

- 操作按钮从单行 flex 改为两行 grid (3+2)，避免窄屏挤压
- SortableItem 和 Card 添加 overflow-hidden，阻止内容溢出导致页面横滑

vite-frontend/src/pages/node.tsx

@@ -125,7 +125,7 @@ const SortableItem = ({
   };
 
   return (
-    <div ref={setNodeRef} style={style} {...attributes}>
+    <div ref={setNodeRef} style={style} {...attributes} className="overflow-hidden">
       {children(listeners)}
     </div>
   );
@@ -1253,7 +1253,7 @@ export default function NodePage() {
                     {(listeners) => (
                     <Card
                       key={node.id}
-                      className="group shadow-sm border border-divider hover:shadow-md transition-shadow duration-200"
+                      className="group shadow-sm border border-divider hover:shadow-md transition-shadow duration-200 overflow-hidden"
                     >
                       <CardHeader className="pb-2">
                         <div className="flex justify-between items-start w-full">
@@ -1514,11 +1514,10 @@ export default function NodePage() {
 
                         {/* 操作按钮 */}
                         <div className="space-y-1.5">
-                          <div className="flex gap-1.5">
                           {!isRemoteNode && (
-                              <>
+                            <div className="grid grid-cols-3 gap-1.5">
                               <Button
-                                  className="flex-1 min-h-8"
+                                className="min-h-8"
                                 color="success"
                                 isLoading={node.copyLoading}
                                 size="sm"
@@ -1528,7 +1527,7 @@ export default function NodePage() {
                                 安装
                               </Button>
                               <Button
-                                  className="flex-1 min-h-8"
+                                className="min-h-8"
                                 color="warning"
                                 isDisabled={node.connectionStatus !== "online"}
                                 isLoading={node.upgradeLoading}
@@ -1539,7 +1538,7 @@ export default function NodePage() {
                                 升级
                               </Button>
                               <Button
-                                  className="flex-1 min-h-8"
+                                className="min-h-8"
                                 color="secondary"
                                 isDisabled={node.connectionStatus !== "online"}
                                 isLoading={node.rollbackLoading}
@@ -1549,8 +1548,12 @@ export default function NodePage() {
                               >
                                 回退
                               </Button>
+                            </div>
+                          )}
+                          <div className={`grid gap-1.5 ${isRemoteNode ? "grid-cols-1" : "grid-cols-2"}`}>
+                            {!isRemoteNode && (
                               <Button
-                                  className="flex-1 min-h-8"
+                                className="min-h-8"
                                 color="primary"
                                 size="sm"
                                 variant="flat"
@@ -1558,10 +1561,9 @@ export default function NodePage() {
                               >
                                 编辑
                               </Button>
-                              </>
                             )}
                             <Button
-                              className={`min-h-8 ${isRemoteNode ? "w-full" : "flex-1"}`}
+                              className="min-h-8"
                               color="danger"
                               size="sm"
                               variant="flat"