style(layout): 侧栏 logo 占位符 '医' 换成 logo.png 图片

- aside-logo 内 <div class='logo-icon'> 字符占位符 → <img src='/logo.png'>
- .logo-icon 改成 img 容器样式 (44x44, object-fit: contain)
- 删 logo-sub 'BAHIM 工作台' (与角色名重复)
- 浏览器 favicon 保持 logo.png (上一 commit)

ry-vue3/src/layout/AdminLayout.vue

@@ -6,8 +6,8 @@
       class="aside"
     >
       <div class="aside-logo">
+        <div class="logo-icon"><img src="/logo.png" alt="logo" /></div>
         <div class="logo-text">{{ roleLabel }}</div>
-        <div class="logo-sub">BAHIM 工作台</div>
       </div>
       <el-menu :default-active="route.path" router class="aside-menu">
         <template v-for="m in menu" :key="m.path">
@@ -233,9 +233,31 @@ const onCommand = (cmd) => { if (cmd === 'logout') logout() }
 <style scoped>
 .admin-layout { height: 100vh; }
 .aside { background: #001529; color: #fff; }
-.aside-logo { padding: 16px; text-align: center; border-bottom: 1px solid var(--brand-primary-darker); }
-.logo-text { color: #fff; font-size: 16px; font-weight: 600; }
-.logo-sub { color: #8a99b3; font-size: 12px; }
+.aside-logo {
+  padding: 20px 16px 16px;
+  text-align: center;
+  border-bottom: 1px solid var(--brand-primary-darker);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 10px;
+}
+.logo-icon {
+  width: 44px;
+  height: 44px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 8px;
+  overflow: hidden;
+}
+.logo-icon img {
+  width: 100%;
+  height: 100%;
+  object-fit: contain;
+  display: block;
+}
+.logo-text { color: #fff; font-size: 14px; font-weight: 600; }
 .aside-menu { background: #001529; border: none; }
 
 /* 一级菜单 + 二级父标题: 统一默认/hover/active 样式 */