Stop tracking distributable IMG files

.gitignore

@@ -46,6 +46,9 @@ Desktop.ini
 /.playwright-cli/
 /output/playwright/
 
+# Flashable disk images are distributed outside Git. Keep release metadata tracked.
+*.img
+
 # Image editor build caches. Released executables remain tracked elsewhere.
 /发布更新相关/镜像编辑器/编辑器源代码/.build-venv/
 /发布更新相关/镜像编辑器/编辑器源代码/.build/
@@ -53,6 +56,6 @@ Desktop.ini
 /发布更新相关/镜像编辑器/编辑器源代码/dist/
 /发布更新相关/镜像编辑器/编辑器源代码/*.spec
 
-# Intentionally not ignored: 发布更新相关/核桃派镜像, 导出包, OTA数据包,
-# 其他依赖, 镜像编辑器/编辑器程序, and 各种归档. This private repository
-# stores those release and historical artifacts as ordinary Git objects.
+# Intentionally not ignored: OTA数据包, 其他依赖, 镜像编辑器/编辑器程序,
+# and 各种归档. Release README, manifests, checksums, and records remain tracked;
+# IMG files are distributed separately and ignored above.