fix: blog CI issues

Author: jonathanyeong

app/components/global/BlueskyPostEmbed.client.vue

@@ -49,7 +49,7 @@ async function resolveAtUri(): Promise<string | null> {
   const [, handle, rkey] = match
 
   // If the handle is already a DID, build the AT URI directly
-  if (handle.startsWith('did:')) {
+  if (handle && handle.startsWith('did:')) {
     return `at://${handle}/app.bsky.feed.post/${rkey}`
   }
 

shared/types/blog-post.ts

@@ -1,3 +1,4 @@
+import { type AtIdentifierString } from '@atproto/lex'
 import type * as app from '#shared/types/lexicons/app'
 
 export type CommentEmbed =
@@ -27,6 +28,6 @@ export interface Comment {
 export interface FederatedArticleInput {
   url: string
   title: string
-  authorHandle: string
+  authorHandle: AtIdentifierString
   description: string
 }