refactor(shared): move profile helpers to lib and import from API and src\n\n- Fix serverless import resolution by avoiding src/** in API\n- Keep code DRY with single shared module

src/utils/profileUtils.ts

@@ -1,40 +1,2 @@
-import { NostrEvent } from 'nostr-tools'
-import { getNpubFallbackDisplay } from './nostrUriResolver'
-
-/**
- * Extract display name from a profile event (kind:0) with consistent priority order
- * Priority: name || display_name || nip05 || npub fallback
- * 
- * @param profileEvent The profile event (kind:0) to extract name from
- * @returns Display name string, or empty string if event is invalid
- */
-export function extractProfileDisplayName(profileEvent: NostrEvent | null | undefined): string {
-  if (!profileEvent || profileEvent.kind !== 0) {
-    return ''
-  }
-
-  try {
-    const profileData = JSON.parse(profileEvent.content || '{}') as { 
-      name?: string
-      display_name?: string
-      nip05?: string
-    }
-    
-    // Consistent priority: name || display_name || nip05
-    if (profileData.name) return profileData.name
-    if (profileData.display_name) return profileData.display_name
-    if (profileData.nip05) return profileData.nip05
-    
-    // Fallback to npub if no name fields
-    return getNpubFallbackDisplay(profileEvent.pubkey)
-  } catch (error) {
-    // If JSON parsing fails, use npub fallback
-    try {
-      return getNpubFallbackDisplay(profileEvent.pubkey)
-    } catch {
-      // If npub encoding also fails, return empty string
-      return ''
-    }
-  }
-}
+export { extractProfileDisplayName } from '../../lib/profile'