feat(admin-web): preserve template wizard entry source and refresh AI banner

- Carry `from=workspace` query from the workbench into the wizard so cancel
  and post-generate redirects return to the workbench instead of always
  landing on /articles/templates.
- AppShell now resolves an effective navKey from `route.query.from`, so the
  sidebar highlight and breadcrumb track the entry source while inside the
  wizard.
- Redesign the brand-info AI analyze CTA into a standalone banner with
  template-aware copy (default / product_review / research_report) and add
  the matching i18n keys.
- Drop the unused 批量生成文章 button and its styling from the templates
  page.

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

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

@@ -2,7 +2,6 @@
 import {
   AppstoreOutlined,
   ArrowRightOutlined,
-  BlockOutlined,
   ExperimentOutlined,
   FileTextOutlined,
   NodeIndexOutlined,
@@ -458,10 +457,6 @@ function refreshRecords(): void {
           <p>{{ t('route.templates.description') }}</p>
         </div>
         <div class="templates-view__header-actions">
-          <a-button class="batch-generate-btn">
-            <template #icon><BlockOutlined /></template>
-            {{ t('templates.actions.batchGenerate') }}
-          </a-button>
           <a-button type="primary" class="templates-view__create-btn" @click="openTemplatePicker">
             <template #icon><PlusOutlined /></template>
             {{ t('templates.actions.chooseTemplate') }}
@@ -796,11 +791,6 @@ function refreshRecords(): void {
   box-shadow: none;
 }
 
-.batch-generate-btn {
-  color: #1677ff;
-  border-color: #1677ff;
-}
-
 .templates-view__filters {
   padding: 20px 24px;
 }