improve registration flows

api/tasks.py

@@ -180,15 +180,16 @@ def verify_user_with_person_api_task(user_id: int):
         f"{(t_user.t_island.name if t_user.t_island else 'N/A')}"
     )
 
+    frontend_url = env.str("FRONTEND_URL", default="https://portal.sarlink.net")
     verification_failed_message = (
         f"⚠️ *User verification failed*\n\n{user_details}\n"
-        f"Visit [SAR Link Portal](https://portal.sarlink.net/users/{user_id}/details) "
+        f"Visit [SAR Link Portal]({frontend_url}/users/{user_id}/details) "
         f"to manually verify this user."
     )
 
     verification_success_message = (
         f"✅ *New user registered and verified*\n\n{user_details}\n"
-        f"View on [SAR Link Portal](https://portal.sarlink.net/users/{user_id}/details)."
+        f"View on [SAR Link Portal]({frontend_url}/users/{user_id}/details)."
     )
 
     def _run(coro) -> None: