feat(studio/articles): show drafting_model (LLM used for draft)

Adds drafting_model to the article type and surfaces it in the detail sheet
(provider / model line + raw JSON block). Regenerates admin API types.

src/routes/_authed/studio/articles.tsx

@@ -127,6 +127,14 @@ function ArticlesPage() {
           { label: '标签', value: detail?.tags?.join('、') },
           { label: 'SEO 关键词', value: detail?.seo_keywords?.join('、') },
           { label: 'CTA', value: detail?.cta },
+          {
+            label: '起草模型',
+            value: detail?.drafting_model
+              ? [detail.drafting_model.provider, detail.drafting_model.model]
+                  .filter(Boolean)
+                  .join(' / ') || '—'
+              : '—',
+          },
           { label: '封面提示词', value: detail?.cover_image_prompt },
           {
             label: 'Dimzou 文档',
@@ -140,6 +148,7 @@ function ArticlesPage() {
         jsonBlocks={[
           { label: '要点 key_takeaways', value: detail?.key_takeaways },
           { label: '大纲 outline', value: detail?.outline },
+          { label: '起草模型 drafting_model', value: detail?.drafting_model },
           { label: '计划 plan', value: detail?.plan },
           { label: '发布排期', value: detail?.publish_schedule },
         ]}