feat(content): add draft support for content collections

This commit introduces a draft system for the 'events' and 'news' collections. A `draft` boolean field has been added to the content schema, and frontend queries are now updated to only fetch and
display content where `draft` is `false`. This allows content to be created and saved without being publicly visible, improving the publishing workflow.

content.config.ts

@@ -12,6 +12,7 @@ export default defineContentConfig({
         date: z.coerce.date(),
         location: z.string(),
         cover: z.string().url(),
+        draft: z.boolean().optional().default(false)
       }),
     }),
     // 新闻集合
@@ -31,6 +32,7 @@ export default defineContentConfig({
         seoTitle: z.string().optional(),
         seoDescription: z.string().optional(),
         ogImage: z.string().optional(),
+        draft: z.boolean().optional().default(false)
       }),
     }),
     // 名人堂