Inherit email link addresses from hosting and proxy settings

backend/app/services/email_recaps.py

@@ -32,7 +32,7 @@ def worker_enabled() -> bool:
 def delivery_ready() -> tuple[bool, str]:
     config = store.settings()
     if not config["public_url"]:
-        return False, "Set the public Magent address for email links."
+        return False, "Set the application URL in Hosting & proxy for email links."
     ready, detail = smtp_email_config_ready()
     if not ready:
         return False, detail
@@ -147,7 +147,7 @@ async def preview(user: dict, month: str | None) -> dict:
     selected = completed_month(month)
     config = store.settings()
     if not config["public_url"]:
-        raise RecapError("Save the public Magent address before previewing an email.")
+        raise RecapError("Set the application URL in Hosting & proxy before previewing an email.")
     try:
         report = await asyncio.wait_for(get_monthly_report(account, selected), timeout=180)
     except HistoryLimitError as exc: