fix(ux): improve comment spacing, merge admin titlebar into global header, fix dark mode editor

- CommentSection: add padding-top 8px to comment-item for spacing between author/time and top
- AdminLayout: remove sticky topbar (now merged into global App.vue header), clean up unused code
- App.vue: show page title for all routes with × separator after brand name, remove admin-route filter
- QuillEditor: use --ac-border-strong for toolbar/container borders, add toolbar button colors for dark mode
- ArticleEditorView: use --ac-border-strong for all borders, btn-cancel now light red with danger colors

src/App.vue

@@ -30,7 +30,7 @@ async function handleLogout() {
   <div>
     <header class="app-header">
       <router-link to="/" class="brand">Mach-CMS</router-link>
-      <span v-if="pageTitle && !isAdminRoute" class="header-page-title">{{ pageTitle }}</span>
+      <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>
@@ -89,6 +89,12 @@ async function handleLogout() {
   color: var(--ac-header-text);
 }
 
+.header-title-sep {
+  margin: 0 8px;
+  color: var(--ac-header-muted);
+  font-weight: 400;
+}
+
 .app-header .brand {
   display: flex;
   align-items: center;

src/components/CommentSection.vue

@@ -205,6 +205,7 @@ onMounted(() => {
 .comment-item {
   display: flex;
   gap: 16px;
+  padding-top: 8px;
 }
 
 .comment-item:not(:last-child) .comment-card {

src/components/QuillEditor.vue

@@ -87,13 +87,30 @@ watch(() => props.modelValue, (val) => {
   line-height: 1.8;
 }
 .quill-editor :deep(.ql-toolbar) {
-  border-color: var(--ac-border, #d4c4b0);
+  border-color: var(--ac-border-strong, #d4c4b0);
   background: var(--ac-surface, #faf8f5);
 }
 .quill-editor :deep(.ql-container) {
-  border-color: var(--ac-border, #d4c4b0);
+  border-color: var(--ac-border-strong, #d4c4b0);
 }
 .quill-editor :deep(.ql-editor.ql-blank::before) {
   color: var(--ac-text-disabled);
 }
+.quill-editor :deep(.ql-toolbar button) {
+  color: var(--ac-text-secondary);
+}
+.quill-editor :deep(.ql-toolbar button:hover) {
+  color: var(--ac-text);
+}
+.quill-editor :deep(.ql-toolbar .ql-active) {
+  color: var(--ac-primary-ink);
+}
+.quill-editor :deep(.ql-toolbar .ql-picker-label),
+.quill-editor :deep(.ql-toolbar .ql-picker-item) {
+  color: var(--ac-text-secondary);
+}
+.quill-editor :deep(.ql-toolbar .ql-picker-label:hover),
+.quill-editor :deep(.ql-toolbar .ql-picker-item:hover) {
+  color: var(--ac-text);
+}
 </style>

src/views/admin/AdminLayout.vue

@@ -1,12 +1,7 @@
 <script setup lang="ts">
-import { computed } from 'vue'
-import { useRoute } from 'vue-router'
 import { useAuthStore } from '@/stores/auth'
 
 const auth = useAuthStore()
-const route = useRoute()
-
-const pageTitle = computed(() => (route.meta.title as string) || '')
 </script>
 
 <template>
@@ -19,10 +14,6 @@ const pageTitle = computed(() => (route.meta.title as string) || '')
         <router-link v-if="auth.isAdmin" to="/admin/comments">评论审核</router-link>
       </nav>
     </aside>
-    <div class="content-wrap">
-      <header class="topbar">
-        <span class="topbar-title">{{ pageTitle }}</span>
-      </header>
     <main class="content">
       <router-view v-slot="{ Component }">
         <transition name="page" mode="out-in">
@@ -31,7 +22,6 @@ const pageTitle = computed(() => (route.meta.title as string) || '')
       </router-view>
     </main>
   </div>
-  </div>
 </template>
 
 <style scoped>
@@ -70,33 +60,9 @@ const pageTitle = computed(() => (route.meta.title as string) || '')
   color: var(--ac-header-text);
 }
 
-.content-wrap {
+.content {
   flex: 1;
-  display: flex;
-  flex-direction: column;
   min-width: 0;
-}
-
-.topbar {
-  position: sticky;
-  top: 0;
-  z-index: 1000;
-  display: flex;
-  align-items: center;
-  padding: 0 20px;
-  height: 52px;
-  background: var(--ac-bg-card);
-  border-bottom: 1px solid var(--ac-border);
-}
-
-.topbar-title {
-  font-family: var(--song-font-serif);
-  font-size: 16px;
-  font-weight: 600;
-  color: var(--ac-text);
-}
-
-.content {
   padding: 20px;
 }
 </style>

src/views/admin/ArticleEditorView.vue

@@ -234,7 +234,7 @@ onMounted(() => {
 .title-input {
   width: 100%;
   padding: 12px 16px;
-  border: 1px solid var(--ac-border);
+  border: 1px solid var(--ac-border-strong);
   border-radius: var(--song-radius-l);
   font-family: 'Noto Serif SC', 'SimSun', 'STSong', serif;
   font-size: 22px;
@@ -263,7 +263,7 @@ onMounted(() => {
 
 .side-section {
   background: var(--ac-bg-card);
-  border: 1px solid var(--ac-border);
+  border: 1px solid var(--ac-border-strong);
   border-radius: var(--song-radius-l);
   padding: 16px;
 }
@@ -299,7 +299,7 @@ onMounted(() => {
 .summary-input {
   width: 100%;
   padding: 8px 12px;
-  border: 1px solid var(--ac-input-border);
+  border: 1px solid var(--ac-border-strong);
   border-radius: var(--song-radius-l);
   font-size: 13px;
   line-height: 1.5;
@@ -323,7 +323,7 @@ onMounted(() => {
   max-height: 120px;
   object-fit: cover;
   border-radius: var(--song-radius-m);
-  border: 1px solid var(--ac-border);
+  border: 1px solid var(--ac-border-strong);
   margin-bottom: 6px;
 }
 
@@ -344,15 +344,17 @@ onMounted(() => {
   display: inline-block;
   padding: 8px 14px;
   background: var(--ac-primary-bg);
+  border: 1px solid var(--ac-border-strong);
   color: var(--ac-primary-ink);
   border-radius: var(--song-radius-m);
   cursor: pointer;
   font-size: 13px;
-  transition: background var(--song-dur-1) var(--song-ease);
+  transition: background var(--song-dur-1) var(--song-ease), border-color var(--song-dur-1) var(--song-ease);
 }
 
 .upload-btn:hover {
   background: var(--ac-active);
+  border-color: var(--ac-primary-ink);
 }
 
 .upload-input {
@@ -371,22 +373,24 @@ onMounted(() => {
   gap: 6px;
   font-size: 13px;
   cursor: pointer;
+  color: var(--ac-text);
 }
 
 .btn-cancel {
   display: block;
   text-align: center;
   padding: 8px;
-  border: 1px solid var(--ac-input-border);
+  border: 1px solid var(--ac-danger-bg);
   border-radius: var(--song-radius-l);
-  color: var(--ac-text-secondary);
+  color: var(--ac-danger-ink);
+  background: var(--ac-danger-bg);
   text-decoration: none;
   font-size: 13px;
-  transition: border-color var(--song-dur-1) var(--song-ease), color var(--song-dur-1) var(--song-ease);
+  transition: background var(--song-dur-1) var(--song-ease), color var(--song-dur-1) var(--song-ease), border-color var(--song-dur-1) var(--song-ease);
 }
 
 .btn-cancel:hover {
-  border-color: var(--ac-primary);
-  color: var(--ac-primary-ink);
+  border-color: var(--ac-danger-ink);
+  color: var(--ac-danger-ink);
 }
 </style>