feat: linebot

1. change expense query reponse string

app/Linebot_handler/Expense.py

@@ -239,21 +239,38 @@ def query_month(line_user_id: str) -> str:
     try:
         user_id = get_or_create_user(db, line_user_id)
         now = datetime.now()
-        rows = db.query(Expense).filter(
-            Expense.user_id == user_id,
-            text("EXTRACT(YEAR FROM date) = :year AND EXTRACT(MONTH FROM date) = :month")
-        ).params(year=now.year, month=now.month).all()
+
+        sql = text("""
+            SELECT 
+                COALESCE(m.display_name, e.item_name) AS display_name, 
+                SUM(e.amount) as total_amount
+            FROM expenses e
+            LEFT JOIN merchant_mapping m ON e.seller_name LIKE '%' || m.pattern || '%'
+            WHERE e.user_id = :user_id 
+              AND EXTRACT(YEAR FROM e.date) = :year 
+              AND EXTRACT(MONTH FROM e.date) = :month
+            GROUP BY display_name
+            ORDER BY total_amount DESC
+        """)
+
+        rows = db.execute(sql, {"user_id": user_id, "year": now.year, "month": now.month}).fetchall()
 
         if not rows:
             return "本月還沒有記錄 📭"
 
         total = sum(float(r.amount) for r in rows)
         summary = {}
-        for r in rows:
-            key = r.item_name or "其他"
-            summary[key] = summary.get(key, 0) + float(r.amount)
-        lines = [f"{cat}：${amt:.0f}" for cat, amt in sorted(summary.items(), key=lambda x: -x[1])]
-        return f"📊 本月統計（{now.month}月）：\n" + "\n".join(lines) + f"\n\n💰 總計：${total:.0f}"
+        for row in rows:
+            name = row.display_name
+            amt = float(row.total_amount)
+            percent = (amt / total) * 100
+            # 加上一點視覺效果
+            summary.append(f"🔹 {name}：${amt:.0f} ({percent:.1f}%)")
+
+        header = f"📊 {now.year}年{now.month}月 消費統計"
+        divider = "--------------------------"
+        footer = f"\n{divider}\n💰 本月總支出：${total:.0f}"
+        return f"{header}\n{divider}\n" + "\n".join(summary) + footer
     except Exception as e:
         print("❌ 查詢失敗:", e)
         return "查詢失敗，請稍後再試"