[1143] 启动页模式下跳过 resume() 的 chrome 重建#4016
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启动页 buffer 的菜单/工具栏全部不可见，但 resume() 仍无条件经 scheme 重建 menu_main/menu_icons/notification_bar/side_tools，且每个菜单构建入口都会先 lazy-initialize-force 强制导入所有 lazy 模块，是启动 OPEN → STARTUP 阶段的 主要开销。照搬 update_menus() 已有的 is_startup_tab_buffer 守卫：启动页仅 保留 tab 栏（menu_icons 4），其余 chrome 由首个真实文档的 resume 同步补建
启动页期间到达 Qt 侧的菜单写入原先被直接丢弃，但 tm_window 的 menu_current 缓存认为已安装，静态菜单（texmacs-menu）之后不再重发， 导致 resume 守卫落地后新建标签页时菜单栏永久缺失（mode/focus 工具栏 的 slot 无守卫所以正常）。改为启动页期间先存后装：写入时缓存 widget 并 置 startupChromePending_，退出启动页时统一补装
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Summary
resume()照搬update_menus()已有的is_startup_tab_buffer守卫：启动页 buffer 跳过 menu_main/menu_icons 0-3/notification_bar/side_tools 的 scheme 重建（每次构建入口都会先lazy-initialize-force，是 OPEN → STARTUP 主要开销），仅保留 tab 栏（menu_icons 4）attach_view→resume()同步补建，无需新增 hook；lazy 模块有(:idle 5000)逐模块预热兜底Test plan
xmake b stem构建通过gf fmt --changed-since=main通过std-bench, Task 'resume'耗时显著下降，STARTUP 时间戳提前🤖 Generated with Claude Code