feat(ai): 添加 AI 用户陪练（流式）功能

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2025-09-02 f8f1d6a91b32077c69dd97334559fe3165ff79b6

 src/main/java/cc/mrbird/febs/mall/entity/MallGoodsCoupon.java

@@ -26,5 +26,4 @@
    //减免金额
    private BigDecimal realAmount;


}