feat(顶栏): LOGO 徽标旁显示平台文字（yh-logo-text 键接入）（LOGO文字与主题JSON化）

src/components/layout.vue

@@ -26,14 +26,30 @@ const readLogoUrl = () => {
     }
     logoUrl.value = v || defaultLogo;
 };
+// LOGO 文字（平台/学校名称，2026-10-09 LOGO 文字轮）：localStorage["yh-logo-text"]（同一异步补齐段写入），空=不展示。
+const logoText = ref("");
+const readLogoText = () => {
+    let v: string | null = null;
+    try {
+        v = localStorage.getItem("yh-logo-text");
+    } catch {
+        v = null;
+    }
+    logoText.value = v || "";
+};
 const onLogoError = () => {
     if (logoUrl.value !== defaultLogo) logoUrl.value = defaultLogo;
 };
 onMounted(() => {
     readLogoUrl();
+    readLogoText();
     document.addEventListener("yh-appearance-updated", readLogoUrl);
+    document.addEventListener("yh-appearance-updated", readLogoText);
+});
+onBeforeUnmount(() => {
+    document.removeEventListener("yh-appearance-updated", readLogoUrl);
+    document.removeEventListener("yh-appearance-updated", readLogoText);
 });
-onBeforeUnmount(() => document.removeEventListener("yh-appearance-updated", readLogoUrl));
 
 const isPanel = ref(false),
     currPath = ref<string>(""),
@@ -191,6 +207,7 @@ function linkHomePage() {
         <header class="header-container fix">
             <!-- 云海 logo 徽标（结构与 Notice layout 对齐，皮肤见通道 base.layout.css .logo-badge） -->
             <span class="logo-badge fl"><img :src="logoUrl" alt="云海" @error="onLogoError" /></span>
+            <span v-if="logoText" class="logo-text">{{ logoText }}</span>
             <div class="fl align-middle icon-box">
                 <div title="首页" class="icon-btn home-btn" @click="linkHomePage">
                     <SvgIcon name="shouye" :size="22" color="#fff" />
@@ -303,4 +320,11 @@ function linkHomePage() {
 .home-btn svg {
     display: block;
 }
+/* LOGO 文字（平台/学校名称）：贴徽标右侧，顶栏品牌色深底上白字，禁止换行挤压布局 */
+.header-container .logo-text {
+    font-size: 16px;
+    font-weight: 600;
+    color: #fff;
+    white-space: nowrap;
+}
 </style>