From 3d6795978cc01304abac3d1e4722de4dd4c8fc0d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E5=BE=B7=E5=AE=87?= <kvtodev@outlook.com>
Date: Wed, 7 Oct 2026 10:52:58 +0800
Subject: [PATCH] =?UTF-8?q?multipart=20=E5=9B=BE=E7=89=87=E6=96=87?=
 =?UTF-8?q?=E4=BB=B6=E5=90=8D=E6=8C=89=E7=9C=9F=E5=AE=9E=E5=86=85=E5=AE=B9?=
 =?UTF-8?q?=E7=B1=BB=E5=9E=8B=E7=BB=99=E6=89=A9=E5=B1=95=E5=90=8D?=
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- 新增 multipart_image_file_name，JPEG/WebP/GIF/AVIF 不再统一叫 .png
- 服务端仍按 MIME part 判定，文件名只作为未来消费者可依赖的事实保持一致
- 补扩展名映射单测
---
 .../src/game_distribution_publish.rs          | 41 ++++++++++++++++++-
 1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/apps/ai-game-creator-shell/src-tauri/src/game_distribution_publish.rs b/apps/ai-game-creator-shell/src-tauri/src/game_distribution_publish.rs
index 207efb87d..b581a3ffd 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/game_distribution_publish.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/game_distribution_publish.rs
@@ -1162,17 +1162,37 @@ fn publish_multipart_form(
             .map_err(|error| format!("构建发布资料 part 失败：{error}"))?,
     );
     if let Some(cover) = media.cover.as_ref() {
-        form = form.part("cover", multipart_image_part(cover, "cover.png")?);
+        form = form.part(
+            "cover",
+            multipart_image_part(
+                cover,
+                &multipart_image_file_name("cover", cover.content_type),
+            )?,
+        );
     }
     for (index, screenshot) in media.screenshots.iter().enumerate() {
         form = form.part(
             "screenshot",
-            multipart_image_part(screenshot, &format!("screenshot-{index}.png"))?,
+            multipart_image_part(
+                screenshot,
+                &multipart_image_file_name(&format!("screenshot-{index}"), screenshot.content_type),
+            )?,
         );
     }
     Ok(form)
 }
 
+/// multipart 文件名按真实内容类型给扩展名：JPEG/WebP 等不再一律叫 `.png`。
+///
+/// 服务端按 MIME part 判定，文件名只是给未来消费者看的事实；这里保持与 `content_type` 一致。
+fn multipart_image_file_name(part_name: &str, content_type: &str) -> String {
+    let extension = match content_type {
+        "image/jpeg" => "jpg",
+        other => other.strip_prefix("image/").unwrap_or("bin"),
+    };
+    format!("{part_name}.{extension}")
+}
+
 fn multipart_image_part(
     image: &DraftImage,
     file_name: &str,
@@ -1852,6 +1872,23 @@ mod tests {
         assert!(image_content_type("cover").is_err());
     }
 
+    #[test]
+    fn multipart_image_file_name_follows_content_type() {
+        assert_eq!(multipart_image_file_name("cover", "image/png"), "cover.png");
+        assert_eq!(
+            multipart_image_file_name("cover", "image/jpeg"),
+            "cover.jpg"
+        );
+        assert_eq!(
+            multipart_image_file_name("screenshot-2", "image/webp"),
+            "screenshot-2.webp"
+        );
+        assert_eq!(
+            multipart_image_file_name("screenshot-0", "application/octet-stream"),
+            "screenshot-0.bin"
+        );
+    }
+
     fn fixture_root(prefix: &str) -> std::path::PathBuf {
         static NEXT_TEST_ID: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(0);
         let root = std::env::temp_dir().join(format!(