feat(points): 新增今日消耗接口 + 个人中心字体调整

后端:
- CRUD 新增 sum_consumed_today() 方法，统计用户今日消费积分总和
- API 新增 GET /points/today-consumed 路由

前端:
- 个人中心积分数字从 40px 改为 32px
- 今日消耗从本地计算改为调用后端接口

python-api/app/api/v1/points.py

@@ -497,6 +497,18 @@ async def get_points_rules(
 
 
 
+# ── 今日消费统计 ──────────────────────────────────────
+
+@router.get("/today-consumed", response_model=ApiResponse[dict])
+async def get_today_consumed(
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+):
+    """获取当前用户今日消费积分总额"""
+    total = await point_transaction.sum_consumed_today(db, user_id=current_user.id)
+    return success_response(data={"total": total})
+
+
 # ── 直接消费扣费（前端/Rust 层调用）───────────────────
 
 @router.post("/consume", response_model=ApiResponse[dict])

python-api/app/crud/point_transaction.py

@@ -5,9 +5,9 @@
 只增不改，用于审计和对账。
 """
 
-from datetime import datetime
+from datetime import datetime, time
 
-from sqlalchemy import select
+from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.crud.base import CRUDBase
@@ -101,6 +101,26 @@ class PointTransactionCRUD(CRUDBase[PointTransaction]):
         )
         return list(result.scalars().all())
 
+    async def sum_consumed_today(
+        self,
+        db: AsyncSession,
+        *,
+        user_id: str,
+    ) -> int:
+        """统计用户今日消费积分总和"""
+        now = datetime.now()
+        start_of_day = datetime.combine(now.date(), time.min)
+        stmt = (
+            select(func.coalesce(func.sum(PointTransaction.amount), 0))
+            .where(
+                PointTransaction.user_id == user_id,
+                PointTransaction.type == "consume",
+                PointTransaction.created_at >= start_of_day,
+            )
+        )
+        result = await db.execute(stmt)
+        return result.scalar() or 0
+
 
 # 导出实例
 point_transaction = PointTransactionCRUD()