fix(header): icon-only nav links and SVG brand

src/App.vue

@@ -29,16 +29,78 @@ async function handleLogout() {
 <template>
   <div>
     <header class="app-header">
-      <router-link to="/" class="brand">Mach-CMS</router-link>
+      <router-link to="/" class="brand" aria-label="Mach-CMS 首页">
+        <svg class="brand-logo" viewBox="0 0 116 30" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Mach">
+          <defs>
+            <filter id="brand-glow" x="-40%" y="-80%" width="180%" height="260%">
+              <feGaussianBlur stdDeviation="1.6" result="blur" />
+              <feMerge>
+                <feMergeNode in="blur" />
+                <feMergeNode in="blur" />
+                <feMergeNode in="SourceGraphic" />
+              </feMerge>
+            </filter>
+          </defs>
+          <text
+            x="1" y="24"
+            fill="#ffffff"
+            font-family="'Noto Sans SC','Source Code Pro',monospace"
+            font-size="21"
+            font-weight="700"
+            letter-spacing="5"
+            filter="url(#brand-glow)"
+          >Mach</text>
+          <line x1="2" y1="28" x2="100" y2="28" stroke="#7ff0ff" stroke-width="1.2" opacity="0.9" stroke-linecap="round" />
+        </svg>
+      </router-link>
       <span v-if="pageTitle" class="header-page-title"><span class="header-title-sep">×</span>{{ pageTitle }}</span>
       <nav class="nav-links">
-        <router-link to="/">首页</router-link>
-        <router-link to="/search">搜索</router-link>
-        <router-link v-if="auth.isLoggedIn" to="/admin">管理后台</router-link>
-        <router-link v-if="auth.isAdmin" to="/admin/comments">评论审核</router-link>
+        <router-link to="/" title="首页">
+          <svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+            <path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z" />
+            <polyline points="9 22 9 12 15 12 15 22" />
+          </svg>
+          <span class="nav-text">首页</span>
+        </router-link>
+        <router-link to="/search" title="搜索">
+          <svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+            <circle cx="11" cy="11" r="7" />
+            <line x1="21" y1="21" x2="16.65" y2="16.65" />
+          </svg>
+          <span class="nav-text">搜索</span>
+        </router-link>
+        <router-link v-if="auth.isLoggedIn" to="/admin" title="管理后台">
+          <svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+            <rect x="3" y="3" width="7" height="7" />
+            <rect x="14" y="3" width="7" height="7" />
+            <rect x="14" y="14" width="7" height="7" />
+            <rect x="3" y="14" width="7" height="7" />
+          </svg>
+          <span class="nav-text">管理后台</span>
+        </router-link>
+        <router-link v-if="auth.isAdmin" to="/admin/comments" title="评论审核">
+          <svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+            <path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z" />
+          </svg>
+          <span class="nav-text">评论审核</span>
+        </router-link>
         <span v-if="auth.username" class="username">{{ auth.username }}</span>
-        <a v-if="auth.isLoggedIn" href="#" @click.prevent="handleLogout">退出</a>
-        <router-link v-else to="/login">登录</router-link>
+        <a v-if="auth.isLoggedIn" href="#" title="退出" @click.prevent="handleLogout">
+          <svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+            <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4" />
+            <polyline points="16 17 21 12 16 7" />
+            <line x1="21" y1="12" x2="9" y2="12" />
+          </svg>
+          <span class="nav-text">退出</span>
+        </a>
+        <router-link v-else to="/login" title="登录">
+          <svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+            <path d="M15 3h4a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-4" />
+            <polyline points="10 17 15 12 10 7" />
+            <line x1="15" y1="12" x2="3" y2="12" />
+          </svg>
+          <span class="nav-text">登录</span>
+        </router-link>
       </nav>
       <button
         class="theme-toggle"
@@ -99,14 +161,16 @@ async function handleLogout() {
   display: flex;
   align-items: center;
   height: 100%;
-  color: var(--ac-header-text);
-  font-family: var(--song-font-display);
-  font-size: 18px;
-  font-weight: 400;
-  letter-spacing: 0.06em;
+  flex-shrink: 0;
   text-decoration: none;
 }
 
+.brand-logo {
+  display: block;
+  width: auto;
+  height: 30px;
+}
+
 .nav-links {
   display: flex;
   align-items: center;
@@ -125,11 +189,22 @@ async function handleLogout() {
 .nav-links a {
   display: inline-flex;
   align-items: center;
+  gap: 5px;
   height: 100%;
   padding: 0 12px;
   color: var(--ac-header-muted);
 }
 
+.nav-icon {
+  width: 16px;
+  height: 16px;
+  flex-shrink: 0;
+}
+
+.nav-text {
+  font-size: 14px;
+}
+
 .nav-links a:hover {
   color: var(--ac-header-text);
 }
@@ -166,8 +241,8 @@ async function handleLogout() {
 
 @media (max-width: 640px) {
   .app-header {
-    padding: 0 12px;
-    gap: 10px;
+    padding: 0 10px;
+    gap: 8px;
   }
 
   .header-page-title {
@@ -187,8 +262,16 @@ async function handleLogout() {
 
   .nav-links a {
     padding: 0 10px;
+    gap: 0;
+    min-width: 38px;
+    justify-content: center;
     white-space: nowrap;
   }
+
+  .nav-text,
+  .nav-links .username {
+    display: none;
+  }
 }
 
 .app-main {