复用原图编辑错误摘要

解析失败分支只计算一次截断响应并同时用于审计与错误返回

server-rs/crates/platform-image/src/vector_engine/raw_edit.rs

@@ -262,6 +262,7 @@ pub async fn create_vector_engine_raw_image_edit(
         Ok(payload) => payload,
         Err(error) => {
             let message = format!("{failure_context}：上游响应不是 JSON：{error}");
+            let raw_excerpt = truncate_raw(body.as_str());
             let audit = build_failure_audit(
                 url.as_str(),
                 failure_context,
@@ -272,7 +273,7 @@ pub async fn create_vector_engine_raw_image_edit(
                 false,
                 message.as_str(),
                 Some(error.to_string()),
-                Some(truncate_raw(body.as_str())),
+                Some(raw_excerpt.clone()),
                 Some(started_at.elapsed().as_millis() as u64),
                 prompt_chars,
                 reference_image_count,
@@ -281,7 +282,7 @@ pub async fn create_vector_engine_raw_image_edit(
             return Err(PlatformImageError::ResponseParse {
                 provider: VECTOR_ENGINE_PROVIDER,
                 message,
-                raw_excerpt: truncate_raw(body.as_str()),
+                raw_excerpt,
                 audit: Some(audit),
             });
         }