Ensure success email subject is wired to EMAIL_SUBJECT_SUCCESS and never blank

scraibe/tasks.py

@@ -162,12 +162,20 @@ def send_success_email(
     """
     Send final email with transcript and attachments.
     Subject is customizable via EMAIL_SUBJECT_SUCCESS.
+    Falls back to a safe default if the env var is missing or blank.
     """
     subject = _get_subject(
         "EMAIL_SUBJECT_SUCCESS",
         "ScrAIbe: Your transcript is ready",
     )
 
+    # Ensure subject is never blank
+    if not subject.strip():
+        subject = "ScrAIbe: Your transcript is ready"
+        logger.warning("EMAIL_SUBJECT_SUCCESS was blank; using default subject.")
+    else:
+        logger.info("Using success email subject: %s", subject)
+
     body = (
         "Hello,\n\n"
         "Your transcription is ready.\n\n"
@@ -204,7 +212,7 @@ def send_success_email(
             html=html,
             attachments=attachments,
         )
-        logger.info("Success email sent to %s for job %s", to, task_id)
+        logger.info("Success email sent to %s for job %s with subject: %s", to, task_id, subject)
     except EmailError as e:
         logger.error("Failed to send success email to %s for job %s: %s", to, task_id, e)