feat(ui): 更新品牌启动页与选集交互

.gitignore

@@ -45,7 +45,10 @@ app.*.map.json
 /android/app/release
 
 # Local demo media and internal planning are absent from the public repo.
-/assets/
+# Launcher/splash source icons are required at build time, so keep them tracked.
+/assets/*
+!/assets/icon/
+!/assets/icon/*.png
 /server/
 /docs/
 /AGENTS.md