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/crawlers/barrons.py

@@ -8,11 +8,13 @@ import requests
 from bs4 import BeautifulSoup
 
 from app.crawlers.base import BaseCrawler
+from app.services import notifications as notif
 
 
 class BarronsCrawler(BaseCrawler):
     def __init__(self, config, logger):
-        super().__init__(name="Barron's 股票推薦", config=config, logger=logger, data_filename='barrons_data.json')
+        # Name used in generic notifications; include emoji to match previous subject
+        super().__init__(name="📈 Barron's 新股票推薦", config=config, logger=logger, data_filename='barrons_data.json')
         self.url = "https://www.barrons.com/market-data/stocks/stock-picks?mod=BOL_TOPNAV"
         self.headers = {
             'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
@@ -68,3 +70,8 @@ class BarronsCrawler(BaseCrawler):
             self.stats['errors'] += 1
             return []
 
+    # Keep Barron's specific email formatting (subject + body)
+    def _build_email(self, items: List[Dict]):
+        subject = f"📈 Barron's 新股票推薦 ({len(items)}條)"
+        body = notif.format_email_body(items)
+        return subject, body