fix: PSK管理页面去掉max-width限制，与其他页面宽度一致

web/src/views/Psks.vue

@@ -1,6 +1,6 @@
 <template>
-  <div class="psks-page">
+  <div>
-    <div class="page-header">
+    <div style="display:flex;justify-content:space-between;align-items:center">
       <h2>PSK 管理</h2>
       <el-button type="primary" @click="showAddDialog">
         <el-icon><Plus /></el-icon>
@@ -8,7 +8,7 @@
       </el-button>
     </div>
 
-    <el-card class="tips-card">
+    <el-card style="margin-top:16px">
       <el-alert type="info" :closable="false" show-icon>
         <template #title>
           PSK（预共享密钥）用于外部客户端（如 mediabot）接入认证。
@@ -190,21 +190,6 @@ onMounted(fetchList)
 </script>
 
 <style scoped>
-.psks-page {
-  max-width: 960px;
-}
-.page-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-}
-.page-header h2 {
-  margin: 0;
-  font-size: 20px;
-}
-.tips-card {
-  margin-top: 16px;
-}
 .secret-text {
   font-family: monospace;
   word-break: break-all;