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

@@ -64,26 +64,39 @@ class OpenInsiderTopCrawler(BaseCrawler):
 
     @staticmethod
     def _parse_money(val: str) -> Optional[int]:
+        """Parse money text into absolute integer dollars.
+
+        Handles formats like:
+        - "$1,234,567"
+        - "($1,234,567)" (treat as negative but return magnitude)
+        - "-$1,234,567" (treat as negative but return magnitude)
+        - "1,234,567"
+        Returns None if no digits found.
+        """
         if not val:
             return None
         s = val.strip()
-        # Remove $ and commas and any parentheses
-        for ch in ['$', ',', '(', ')', '+']:
+        # Detect negative indicators before stripping
+        is_negative = s.startswith('-') or '(' in s
+        # Normalize: remove currency symbols, commas, parentheses, plus/minus, spaces
+        for ch in ['$', ',', '(', ')', '+', '-', ' ']:
             s = s.replace(ch, '')
-        # Some cells may include text like "$1,234,567 (incl. options)"
-        # Keep only leading numeric part
+        # Keep only leading digits
         num = ''
         for c in s:
             if c.isdigit():
                 num += c
-            elif c in ' .':
+            elif c == '.':
+                # ignore decimal points; values appear to be whole dollars
                 continue
             else:
                 break
         if not num:
             return None
         try:
-            return int(num)
+            value = int(num)
+            # We return absolute magnitude; sign is not needed for threshold
+            return abs(value)
         except ValueError:
             return None
 
@@ -148,14 +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
@@ -221,10 +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]