删除仅测试使用的图片编辑封装

- 删除 create_openai_image_edit 与 create_openai_image_edit_with_references 两个 dead_code 封装
- 空参考图本地校验用例改走 create_openai_image_edit_with_references_and_model，保留原覆盖

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

@@ -2,8 +2,7 @@ use axum::http::StatusCode;
 use platform_image::{
     DownloadedImage, GeneratedImages, ImageProvider, ImageProviderClient, ImageProviderSettings,
     NANOBANANA_2_MODEL, PlatformImageError, PlatformImageStatusHint, ReferenceImage,
-    VECTOR_ENGINE_PROVIDER, build_image_http_client, create_image_edit,
-    create_image_edit_with_references, create_image_edit_with_references_and_model,
+    VECTOR_ENGINE_PROVIDER, build_image_http_client, create_image_edit_with_references_and_model,
     create_image_generation_with_model, create_nanobanana_generate_content,
     missing_reference_images_error, resolve_image_provider,
 };
@@ -221,102 +220,6 @@ pub(crate) async fn create_openai_nanobanana_generate_content(
     .await
 }
 
-pub(crate) async fn create_openai_image_edit(
-    _http_client: &reqwest::Client,
-    settings: &OpenAiImageSettings,
-    prompt: &str,
-    negative_prompt: Option<&str>,
-    size: &str,
-    reference_image: &OpenAiReferenceImage,
-    failure_context: &str,
-) -> Result<OpenAiGeneratedImages, AppError> {
-    let started_at_micros = current_utc_micros();
-    let request_payload = json!({
-        "size": size,
-        "promptChars": prompt.chars().count(),
-        "negativePromptChars": negative_prompt.map(str::chars).map(Iterator::count),
-        "referenceImageCount": 1,
-    });
-    let provider_client = settings.client_for_model(GPT_IMAGE_2_5_EDIT_MODEL);
-    let provider_settings = settings.provider_settings_for_model(GPT_IMAGE_2_5_EDIT_MODEL);
-    let result = create_image_edit(
-        provider_client.http_client(),
-        &provider_settings,
-        prompt,
-        negative_prompt,
-        size,
-        reference_image,
-        failure_context,
-    )
-    .await;
-    map_platform_image_result(
-        settings,
-        result,
-        "image_edit",
-        failure_context,
-        request_payload,
-        started_at_micros,
-    )
-    .await
-}
-
-pub(crate) async fn create_openai_image_edit_with_references(
-    _http_client: &reqwest::Client,
-    settings: &OpenAiImageSettings,
-    prompt: &str,
-    negative_prompt: Option<&str>,
-    size: &str,
-    candidate_count: u32,
-    reference_images: &[OpenAiReferenceImage],
-    failure_context: &str,
-) -> Result<OpenAiGeneratedImages, AppError> {
-    let started_at_micros = current_utc_micros();
-    let request_payload = json!({
-        "size": size,
-        "candidateCount": candidate_count,
-        "promptChars": prompt.chars().count(),
-        "negativePromptChars": negative_prompt.map(str::chars).map(Iterator::count),
-        "referenceImageCount": reference_images.len(),
-    });
-    // 中文注释：先做本地参考图校验，避免 provider 客户端缺失时在校验前 panic。
-    if reference_images.is_empty() {
-        return map_platform_image_result(
-            settings,
-            Err(missing_reference_images_error(
-                ImageProvider::Tiantoken,
-                failure_context,
-            )),
-            "image_edit_with_references",
-            failure_context,
-            request_payload,
-            started_at_micros,
-        )
-        .await;
-    }
-    let provider_client = settings.client_for_model(GPT_IMAGE_2_5_EDIT_MODEL);
-    let provider_settings = settings.provider_settings_for_model(GPT_IMAGE_2_5_EDIT_MODEL);
-    let result = create_image_edit_with_references(
-        provider_client.http_client(),
-        &provider_settings,
-        prompt,
-        negative_prompt,
-        size,
-        candidate_count,
-        reference_images,
-        failure_context,
-    )
-    .await;
-    map_platform_image_result(
-        settings,
-        result,
-        "image_edit_with_references",
-        failure_context,
-        request_payload,
-        started_at_micros,
-    )
-    .await
-}
-
 #[allow(clippy::too_many_arguments)]
 pub(crate) async fn create_openai_image_edit_with_references_and_model(
     _http_client: &reqwest::Client,
@@ -758,9 +661,10 @@ mod tests {
         };
         let http_client = reqwest::Client::new();
 
-        let result = create_openai_image_edit_with_references(
+        let result = create_openai_image_edit_with_references_and_model(
             &http_client,
             &settings,
+            GPT_IMAGE_2_5_EDIT_MODEL,
             "提示词",
             None,
             "1:1",