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## 变更内容 - 为 AGC 更新提示增加可访问的 X 关闭按钮。 - 复用现有 dismiss 逻辑，手动关闭后立即移除提示。 - 增加关闭按钮的 hover、禁用和图标样式。 ## 验证 - npm --prefix apps/ai-game-creator-shell run typecheck - npm exec vitest run apps/ai-game-creator-shell/tests/appUpdate.test.ts - npm run check:encoding - git diff --check Reviewed-on: http://192.168.35.82/git/GenarrativeAI/Genarrative/pulls/276 Reviewed-by: 段舒康 <kdletters@qq.com> Co-authored-by: 孔令弘 <ink29535@proton.me> Co-committed-by: 孔令弘 <ink29535@proton.me>