docs(release-notes): onboarding welcome step per board

release-notes/studio/unreleased/editor-board-restyle.md

@@ -68,6 +68,7 @@
 - 设置 › 数据按稿重做：「记忆与用量」「会话存储」「备份」三张卡，每项一行；记忆（带条数）、用量、上传量、存储、导出与导入配置、云备份收进药丸，费用币种、自动归档、会话写入位置、1.x 旧会话直接在行上操作；稿里的「上传量」开关内核没有对应设置（只有请求大小的报告），所以这一行打开报告；从记忆入口打开设置仍直接进记忆页（ed6bb65d1）。
 - 设置 › 连接和账号与关于按稿重做：连接是「网络」「其他机器」两张卡（网络、远程、手机访问各一行，进药丸看详情）；账号与关于是「账号」「版本与诊断」「关于」三张卡（账号、版本、日志、追踪导出各一行，社区与赞助收进药丸）；直接定位到某个页面型设置时落在该页面顶部，分类的项数不再把页内的块重复计算（676fbd010）。
 - 设置 › 外观、对话显示、操作与性能拆成三个各自独立的页面并按稿重做：外观是「主题」「文字」「窗口」三张卡（壁纸、字体、大小、窗口进药丸，明暗、视觉效果、文字粗细、对比度直接在行上）；对话显示是「过程」「文件与预览」「提示」；操作与性能是「快捷键」「标签与导航」「运行中」「性能」；单控件的块统一成一行；去掉「高级外观」折叠，其中的粗细、对比度、效果成为行（d6a43b8fd）。
+- 首次引导的欢迎步按稿居中：大标志、标题、说明、「开始设置」按钮、底部提示；「稍后再说」放在按钮下方（fd5f5d06c）。稿里的「从备份文件导入」没做：引导里还没有可调用的导入流程。
 
 
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@@ -143,3 +144,4 @@
 - Settings › Data follows the board: Memory and usage, Session storage and Backup cards of single rows; memory (with its count), usage, upload volume, storage and the two backups sit behind a pill while currency, auto-archive, session location and 1.x sessions act on the row; the board's upload switch has no kernel setting behind it (only a request-size report), so that row opens the report; opening settings from the memory entry still lands on the memory page (ed6bb65d1).
 - Settings › Connection and Account & About follow the board: Connection is Network and Other machines cards (network, remote and phone access one row each behind a pill); Account & About is Account, Version and diagnostics, and About cards (account, version, logs and trace export one row each, community and sponsorship behind pills); landing on a page-type setting lands at the page's top, and section counts no longer count blocks drawn inside another page (676fbd010).
 - Settings › Appearance, Conversation display and Operation & performance are now three pages of their own, composed as the boards draw them: Appearance as Theme, Text and Window cards (wallpaper, typeface, size and window behind pills; light/dark, effects, weight and contrast on the row), Conversation display as Process, Files and previews, and Notices, and Operation & performance as Shortcuts, Tabs and navigation, While running, and Performance; a single-control block draws as one row; the advanced-appearance disclosure goes and its weight, contrast and effects are rows (d6a43b8fd).
+- The onboarding welcome step is centred as the board draws it: large wordmark, headline, body, the primary button and the note, with the skip under the button (fd5f5d06c). The board's import-from-backup link is not drawn: onboarding has no import flow to call.