复用原始图片编辑 HTTP 客户端

让 raw edit 接收 api-server 构造的 VectorEngine reqwest 客户端。

通过 request builder 保留有效请求超时，不修改现有连接池策略。

移除不再使用的客户端构造错误分支并同步技术方案。

docs/technical/【技术方案】Raw GPT Image 2图片编辑代理-2026-09-07.md

@@ -90,7 +90,7 @@ provider 响应只提取并透传 `data[].b64_json` 字符串，不在服务端
 ## 代码拆分
 
 - `server-rs/crates/api-server/src/raw_image.rs`：独立路由 handler、multipart 字段解析、请求/响应 DTO、PNG 输入校验、预检查和 raw billing 编排。
-- `server-rs/crates/platform-image/src/vector_engine/raw_edit.rs`：raw 编辑选项、严格尺寸校验、独立 provider 请求映射和 `b64_json` 响应透传；不复用现有 editor 图片编辑 client 或其 multipart transport。
+- `server-rs/crates/platform-image/src/vector_engine/raw_edit.rs`：raw 编辑选项、严格尺寸校验、独立 provider 请求映射和 `b64_json` 响应透传；由 api-server 按现有图片 API 传统构造并传入共享的 VectorEngine `reqwest::Client`，不在每个 raw 调用内部重复构造 client。每次请求仍用 `effective_request_timeout_ms` 通过 request builder 设置剩余 deadline；不修改统一 transport builder 的连接池策略。
 
 raw-edit 的图片输入使用独立的 `RawImageEditImage`（`bytes::Bytes`），由 reqwest `Part::stream(Body::from(Bytes))` 直接接管 multipart 请求体，避免整图和掩码在 `Part::bytes` 的 `Cow<[u8]>` 转换中再次复制。既有 `ReferenceImage`、`DownloadedImage` 及 curl/编辑器链路继续保持 `Vec<u8>` 契约，不因 raw-edit 引入全局字节类型迁移。
 

server-rs/crates/api-server/src/raw_image.rs

@@ -22,8 +22,8 @@ use crate::{
     auth::AuthenticatedAccessToken,
     http_error::AppError,
     openai_image_generation::{
-        map_platform_image_error, record_openai_image_failure_if_configured,
-        require_openai_image_settings,
+        build_openai_image_http_client, map_platform_image_error,
+        record_openai_image_failure_if_configured, require_openai_image_settings,
     },
     request_context::RequestContext,
     state::{AppState, RAW_IMAGE_DECODE_MAX_CONCURRENCY},
@@ -119,6 +119,7 @@ pub(crate) async fn edit_raw_image(
         None,
     );
     let provider_settings = settings.provider_settings();
+    let http_client = build_openai_image_http_client(&settings)?;
     let user_id = authenticated.claims().user_id().to_string();
     let request_id = request_context.request_id().to_string();
     let points_cost = raw_image_edit_price(&state, prepared.width, prepared.height).await?;
@@ -136,6 +137,7 @@ pub(crate) async fn edit_raw_image(
     let started_at_micros = (OffsetDateTime::now_utc().unix_timestamp_nanos() / 1_000) as i64;
     let operation = async move {
         let generated = match create_vector_engine_raw_image_edit(
+            &http_client,
             &provider_settings,
             prepared.prompt.as_str(),
             prepared.image,

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

@@ -118,6 +118,7 @@ pub fn validate_raw_image_edit_dimensions(
 
 /// Independent raw GPT Image 2 proxy; it does not call the editor image-edit client.
 pub async fn create_vector_engine_raw_image_edit(
+    http_client: &reqwest::Client,
     settings: &VectorEngineImageSettings,
     prompt: &str,
     image: RawImageEditImage,
@@ -181,13 +182,9 @@ pub async fn create_vector_engine_raw_image_edit(
         );
     }
 
-    let client = reqwest::Client::builder()
-        .timeout(Duration::from_millis(request_timeout_ms))
-        .http1_only()
-        .build()
-        .map_err(|error| invalid_config(failure_context, error.to_string()))?;
-    let response = client
+    let response = http_client
         .post(url.as_str())
+        .timeout(Duration::from_millis(request_timeout_ms))
         .bearer_auth(settings.api_key.as_str())
         .multipart(form)
         .send()
@@ -333,13 +330,6 @@ fn invalid_input(context: &str, message: String) -> PlatformImageError {
     }
 }
 
-fn invalid_config(context: &str, message: String) -> PlatformImageError {
-    PlatformImageError::InvalidConfig {
-        provider: VECTOR_ENGINE_PROVIDER,
-        message: format!("{context}：构造请求客户端失败：{message}"),
-    }
-}
-
 fn request_error(
     url: &str,
     context: &str,
@@ -477,16 +467,6 @@ mod tests {
         assert_eq!(error.to_string(), "raw_image_edit：请求参数无效：尺寸无效");
     }
 
-    #[test]
-    fn invalid_config_error_keeps_operation_context() {
-        let error = invalid_config("raw_image_edit", "builder failed".to_string());
-
-        assert_eq!(
-            error.to_string(),
-            "raw_image_edit：构造请求客户端失败：builder failed"
-        );
-    }
-
     #[test]
     fn raw_edit_image_owns_shared_bytes_without_conversion() {
         let bytes = bytes::Bytes::from_static(b"raw-image");