refactor(notifications): unify email sending via _send_email; standardize crawler notifications\n\n- Extract _send_email and have send_email/send_custom_email share it\n- BaseCrawler: centralize _send_notifications and add _build_email hook\n- BarronsCrawler: override _build_email to keep original subject/body\n- OpenInsiderCrawler: remove custom _send_notifications, add _build_email\n- /notify_test: use crawler _build_email + send_custom_email for emails

app/api/server.py

@@ -75,7 +75,13 @@ def create_app(crawler) -> Flask:
             if channel == 'email':
                 if not c.config.email:
                     return {"error": "Email config not set"}
-                notif.send_email(test_pick, c.config.email)
+                # Build subject/body using crawler's formatting hook for consistency
+                if hasattr(c, '_build_email'):
+                    subject, body = c._build_email(test_pick)
+                else:
+                    subject = f"{getattr(c, 'name', '通知測試')}（測試）"
+                    body = notif.format_email_body(test_pick)
+                notif.send_custom_email(subject, body, c.config.email)
             elif channel == 'webhook':
                 if not c.config.webhook_url:
                     return {"error": "Webhook URL not set"}