🐛 fix(ci): add version prefix to latest*.yml URLs in S3 upload (#12770)

The latest*.yml files uploaded to S3 channel root lacked the $VERSION/
prefix in their URLs, causing electron-updater to request files at
the wrong path (e.g., /canary/LobeHub-Canary-xxx.zip instead of
/canary/2.1.38-canary.1/LobeHub-Canary-xxx.zip), resulting in 404.

Now sed -i modifies latest*.yml in-place before uploading, and
channel-specific yml files are copied from the already-modified ones.

.github/actions/desktop-publish-s3/action.yml

@@ -83,21 +83,32 @@ runs:
           fi
         done
 
-        # 2. 创建 {channel}*.yml (从 latest*.yml 复制，URL 加版本目录前缀)
+        # 2. 为所有 latest*.yml 的 URL 加版本目录前缀
         # electron-builder 始终生成 latest*.yml，不区分 channel
+        # 安装包在 s3://$BUCKET/$CHANNEL/$VERSION/ 下，URL 需加 $VERSION/ 前缀
+        echo ""
+        echo "📋 Adding version prefix to latest*.yml URLs..."
+        for yml in release/latest*.yml; do
+          if [ -f "$yml" ]; then
+            # url: xxx.dmg -> url: {VERSION}/xxx.dmg
+            sed -i "s|url: |url: $VERSION/|g" "$yml"
+            echo "   📄 Updated $(basename $yml) with URL prefix: $VERSION/"
+          fi
+        done
+
+        # 3. 创建 {channel}*.yml (从已修改的 latest*.yml 复制)
         # electron-updater 在对应 channel 时会找 {channel}-mac.yml
         echo ""
         echo "📋 Creating ${CHANNEL}*.yml files from latest*.yml..."
         for yml in release/latest*.yml; do
           if [ -f "$yml" ]; then
             channel_name=$(basename "$yml" | sed "s/latest/$CHANNEL/")
-            # url: xxx.dmg -> url: {VERSION}/xxx.dmg
-            sed "s|url: |url: $VERSION/|g" "$yml" > "release/$channel_name"
-            echo "   📄 Created $channel_name from $(basename $yml) with URL prefix: $VERSION/"
+            cp "$yml" "release/$channel_name"
+            echo "   📄 Created $channel_name from $(basename $yml)"
           fi
         done
 
-        # 3. 创建 renderer manifest (仅 stable 渠道有 renderer tar)
+        # 4. 创建 renderer manifest (仅 stable 渠道有 renderer tar)
         RENDERER_TAR="release/lobehub-renderer.tar.gz"
         if [ -f "$RENDERER_TAR" ]; then
           echo ""
@@ -118,7 +129,7 @@ runs:
           echo "   📄 Created ${CHANNEL}-renderer.yml"
         fi
 
-        # 4. 上传 manifest 到根目录和版本目录
+        # 5. 上传 manifest 到根目录和版本目录
         # 根目录: electron-updater 需要，每次发版覆盖
         # 版本目录: 作为存档保留
         echo ""