feat(openinsider_top): add trade type tag in notifications and ensure absolute amount display

- Prefix titles and email lines with normalized trade tag (BUY/SALE/...)\n- Include amount as absolute value in lines; keep threshold logic unchanged

app/crawlers/openinsider_top.py

@@ -161,14 +161,21 @@ class OpenInsiderTopCrawler(BaseCrawler):
             amount = self._parse_money(value_text)
             if amount is None or amount < self.min_amount:
                 continue
+            # Normalize trade type tag for notification clarity
+            tag = self._trade_tag(trans_type)
 
-            title = f"{ticker} {trans_type} - {insider} qty {qty} @ {price} value ${amount:,} on {trade_date}"
+            title = f"[{tag}] {ticker} - {insider} qty {qty} @ {price} value ${amount:,} on {trade_date}"
             hash_src = f"{ticker}|{insider}|{trans_type}|{qty}|{price}|{trade_date}|{amount}|{url}"
             items.append({
                 'title': title,
                 'link': url,
                 'scraped_at': datetime.now().isoformat(),
                 'hash': hashlib.md5(hash_src.encode('utf-8')).hexdigest()[:12],
+                'trade_type': trans_type,
+                'trade_tag': tag,
+                'ticker': ticker,
+                'amount': amount,
+                'trade_date': trade_date,
             })
 
         return items
@@ -234,9 +241,30 @@ class OpenInsiderTopCrawler(BaseCrawler):
         subject = f"OpenInsider 當日大額內部人交易（≥${self.min_amount:,}） - {len(items)} 筆"
         lines = []
         for it in items[:10]:
-            lines.append(f"• {it.get('title','')}")
+            tag = it.get('trade_tag') or 'TRADE'
+            ticker = it.get('ticker') or ''
+            amount = it.get('amount')
+            tdate = it.get('trade_date') or ''
+            if isinstance(amount, int):
+                line = f"• [{tag}] {ticker} ${amount:,} on {tdate}"
+            else:
+                line = f"• [{tag}] {it.get('title','')}"
+            lines.append(line)
         body = (
             f"發現 {len(items)} 筆符合金額門檻的內部人交易（OpenInsider）：\n\n" + "\n".join(lines) + "\n\n"
             f"抓取時間：{datetime.now().isoformat()}\n來源：\n- " + "\n- ".join(self.urls)
         )
         return subject, body
+
+    @staticmethod
+    def _trade_tag(trans_type: str) -> str:
+        t = (trans_type or '').lower()
+        if 'sale' in t or 'sell' in t:
+            return 'SALE'
+        if 'purchase' in t or 'buy' in t:
+            return 'BUY'
+        if 'option' in t:
+            return 'OPTION'
+        if 'gift' in t:
+            return 'GIFT'
+        return (trans_type or 'TRADE').upper()[:20]