feat(keywords): rename brand-question terminology to search-keyword + add entity exclusion

- Rename UI/prompt labels: "品牌主问题" → "优化关键词", "搜索问题" → "搜索词"
- Add brand/competitor entity exclusion filter in question expansion (AI distill path)
- Refactor combination question text normalization, remove manual question-mark appending
- Update prompts to emphasize commercial-intent search queries over editorial phrasing
- Sync prompt changes across server/configs, deploy, and k3s configs
- Update i18n, frontend views (BrandQuestionCreate, TemplateWizard), and test fixtures

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

apps/admin-web/src/main.ts

@@ -3,6 +3,7 @@ import { QueryClient, VueQueryPlugin } from '@tanstack/vue-query'
 import {
   Alert,
   App as AntApp,
+  AutoComplete,
   Avatar,
   Badge,
   Button,
@@ -111,6 +112,7 @@ app.component('ATextarea', Input.TextArea)
 ;[
   Alert,
   AntApp,
+  AutoComplete,
   Avatar,
   Badge,
   Button,