eyecandy improvements

backend/app/services/link_service.py

@@ -127,6 +127,15 @@ def list_public_links(username: str | None = None):
     return records
 
 
+def get_public_profile(username: str) -> dict | None:
+    with get_connection() as conn:
+        row = conn.execute(
+            'SELECT username, avatar_url, bio FROM users WHERE username = ?',
+            (username,),
+        ).fetchone()
+    return dict(row) if row else None
+
+
 def update_link(
     link_id: str,
     user_id: str,