From 5049c27f3df5bbcf2f41e3431bd309af41ce075e Mon Sep 17 00:00:00 2001
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Date: Tue, 22 Sep 2026 13:49:01 +0800
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- 底价与加价项累加改用 checked_add 校验，配置阶段即失败
- 避免结算路径 saturating_add 在异常配置下静默少收
---
 .../crates/api-server/src/tripo3d/pricing.rs   | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/server-rs/crates/api-server/src/tripo3d/pricing.rs b/server-rs/crates/api-server/src/tripo3d/pricing.rs
index e40a1aa93..e3c808074 100644
--- a/server-rs/crates/api-server/src/tripo3d/pricing.rs
+++ b/server-rs/crates/api-server/src/tripo3d/pricing.rs
@@ -202,6 +202,24 @@ impl Model3dPricingConfig {
                 return Err(format!("缺少 add-on {add_on:?} 的价格"));
             }
         }
+        // 加价项与底价都要累加进账单，配置阶段就挡住溢出，避免结算时静默截断。
+        let add_on_total = self
+            .add_on_prices
+            .values()
+            .try_fold(0u32, |total, price| total.checked_add(*price));
+        let max_base_price = self
+            .base_prices
+            .values()
+            .flat_map(|prices| prices.values())
+            .flat_map(|price| [price.no_texture, price.texture])
+            .max()
+            .unwrap_or(0);
+        if add_on_total
+            .and_then(|total| total.checked_add(max_base_price))
+            .is_none()
+        {
+            return Err("3D 定价表加总超出 u32 上限，请下调配置价格".to_string());
+        }
         Ok(())
     }