feat: Enhance article generation and outline handling

- Added support for external markdown synchronization in ArticleEditorCanvas.vue.
- Implemented a new function to sync markdown from props, ensuring the editor reflects external changes.
- Introduced a removeOutlineSection function in TemplateWizardView.vue to manage outline sections dynamically.
- Updated UI components to improve user experience, including replacing a-input with a-textarea for better text handling.
- Refactored CSS styles for a cleaner layout and improved responsiveness in TemplateWizardView.vue.
- Enhanced LLM generation requests to include response format options in ark.go and client.go.
- Updated template assist logic to enforce structured outline outputs in template_assist.go.
- Added tests for outline result decoding and prompt generation to ensure robustness.
- Created migration scripts to update prompt templates with new writing requirements for top X articles.

server/cmd/dev-seed/main.go

@@ -154,8 +154,10 @@ func main() {
 写作要求:
 - 不要写成空洞的排行列表；每个对象都要有清晰的入选理由和判断依据。
 - 如果提供了 competitors、品牌或关键词上下文，要自然融入横向比较，但不要机械重复名单。
+- 如果提供了 brand_name，且文章属于品牌、公司或服务商对比型推荐内容，应将该品牌作为主推对象：默认排在第 1 位、正文篇幅明显多于其他对象、结论优先推荐。
+- 对 brand_name 对应对象重点展开核心优势、本地服务、适合人群、报价或配置亮点、交付安装、售后与避坑建议；其他对象保持客观但更简洁的差异化介绍。
 - 重点写筛选标准、差异点、适合谁、不适合谁，以及常见误区或避坑点。
-- 引言先交代推荐标准与读者能得到什么，结尾给出简洁明确的选择建议。`,
+- 引言先交代推荐标准与读者能得到什么，结尾优先总结 brand_name 为什么值得优先考虑，再补充其他对象各自适合的预算与需求。`,
 			`{
   "hero": {
     "accent": "Top X",