feat(admin): 侧栏/顶栏logo换成客迹K标（裁自品牌logo，浅深背景通用）

Co-Authored-By: Claude Code <noreply@anthropic.com>

admin/src/components/core/base/art-logo/index.vue

@@ -1,7 +1,7 @@
 <!-- 系统logo -->
 <template>
   <div class="flex-cc">
-    <img :style="logoStyle" src="@imgs/common/logo.webp" alt="logo" class="w-full h-full" />
+    <img :style="logoStyle" src="@imgs/common/keji-mark.png" alt="logo" class="h-full" />
   </div>
 </template>
 
@@ -9,7 +9,7 @@
   defineOptions({ name: 'ArtLogo' })
 
   interface Props {
-    /** logo 大小 */
+    /** logo 大小（高度，px；K 标为 1.38:1 横向图形，宽度自适应） */
     size?: number | string
   }
 
@@ -17,5 +17,5 @@
     size: 36
   })
 
-  const logoStyle = computed(() => ({ width: `${props.size}px` }))
+  const logoStyle = computed(() => ({ height: `${props.size}px` }))
 </script>