修正 Raw 图片尺寸校验错误语义

尺寸校验失败改用请求参数无效语义

补充错误文案回归测试

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

@@ -100,7 +100,7 @@ pub async fn create_vector_engine_raw_image_edit(
     failure_context: &str,
 ) -> Result<GeneratedImages, PlatformImageError> {
     validate_raw_image_edit_dimensions(options.width, options.height)
-        .map_err(|error| invalid_request(failure_context, error.to_string()))?;
+        .map_err(|error| invalid_input(failure_context, error.to_string()))?;
     let url = vector_engine_images_edit_url(settings);
     let started_at = Instant::now();
     let prompt_chars = Some(prompt.chars().count());
@@ -347,6 +347,13 @@ fn invalid_request(context: &str, message: String) -> PlatformImageError {
     }
 }
 
+fn invalid_input(context: &str, message: String) -> PlatformImageError {
+    PlatformImageError::InvalidRequest {
+        provider: VECTOR_ENGINE_PROVIDER,
+        message: format!("{context}：请求参数无效：{message}"),
+    }
+}
+
 fn invalid_config(message: String) -> PlatformImageError {
     PlatformImageError::InvalidConfig {
         provider: VECTOR_ENGINE_PROVIDER,
@@ -566,4 +573,11 @@ mod tests {
             Err(RawImageEditDimensionError::PixelCount)
         );
     }
+
+    #[test]
+    fn dimension_validation_error_identifies_client_input() {
+        let error = invalid_input("raw_image_edit", "尺寸无效".to_string());
+
+        assert_eq!(error.to_string(), "raw_image_edit：请求参数无效：尺寸无效");
+    }
 }