refactor(admin-web): unify page headers with shared title card

Introduce .page-title-card style and migrate Images, Knowledge,
KolDashboard, KolManage, KolProfile views to the shared header layout.
Add subtitle copy for KOL dashboard and manage views.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/admin-web/src/views/KolManageView.vue

@@ -224,6 +224,15 @@ function packageStatusLabel(status: string) {
 
 <template>
   <div class="kol-manage-view">
+    <section v-if="!editingPromptId" class="page-title-card">
+      <div class="page-title-card__header">
+        <div class="page-title-card__copy">
+          <h2>{{ t("kol.manage.title") }}</h2>
+          <p>{{ t("kol.manage.subtitle") }}</p>
+        </div>
+      </div>
+    </section>
+
     <div v-if="editingPromptId" class="manage-content manage-content--editor">
       <div class="fullscreen-editor">
         <KolPromptEditor :prompt-id="editingPromptId" @back="handleCloseEditor" />
@@ -401,6 +410,7 @@ function packageStatusLabel(status: string) {
 .kol-manage-view {
   display: flex;
   flex-direction: column;
+  gap: 20px;
   height: calc(100vh - 120px);
 }