chore: gitignore 忽略 .DS_Store 与 .cache/

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -40,3 +40,9 @@ mvnw.cmd
 # web2 file
 */src/main/resources/static/web
 */src/main/resources/static/mjs
+
+# macOS
+.DS_Store
+
+# 本地缓存
+.cache/