chore: 忽略tmp临时目录

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -63,3 +63,6 @@ wails-restart.log
 # 测试运行产物
 /test/testutil/log/
 /test/testutil/test_*.db
+
+# 临时目录
+/tmp/