docs(rectification): record the surface redo — BUG-505..509, DESIGN.md rectification surface, walkthrough section 8

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JUei7K13cYxLHE3Axe4A45

frontend/DESIGN.md

@@ -200,6 +200,31 @@ The base unit is 4px. Tokens are `--space-1: 4px`, `--space-2: 8px`, `--space-3:
 - **Surface:** canvas fill, hairline border, `--shadow-elevated`; hover uses the warm card surface. No utility-class shadows.
 - **Accessibility:** a real button in document order with a visible label matching its accessible name, 44px target, and the focus ring; the icon is decorative.
 
+### Rectification surface
+
+The birth-time rectification session is the consultation transcript plus a house board; questions live inside the assistant message that asked them. It shares every waiting vocabulary with the consultation surface; nothing here spins or says "loading" after the reveal.
+
+- **Reveal:** the surface mounts once per session/Case binding. Opening a Case (homepage card, sidebar row, deep link or refresh) reads the turns and the snapshot in one Case request before the switch, under the same 4-second budget as the home reveal (`RECTIFICATION_OPEN_HYDRATE_TIMEOUT_MS` is `BOOTSTRAP_PREPARE_TIMEOUT_MS`); a session selected at bootstrap is hydrated during the prepare phase. The entry shows a static note meanwhile (card footer “正在打开…”, sidebar row “打开中”, `cursor: progress`) and the previous view stays put. Turns and snapshot are initial state; anything that arrives later is a prop or state update, never a remount. A late or failed read still reveals, with the composer notice “校正记录没有完全加载，可以继续”.
+- **States** — what the transcript's trailing entry and the composer show:
+
+| State | Trailing entry | Composer |
+|---|---|---|
+| `opening` | live row “正在读取你的出生资料，准备第一个问题…”, then tool labels | disabled, stop visible |
+| `empty` | “这段校正还没有开始。” and one primary action “开始提问” | enabled |
+| `question-live` | the asking message carries the embedded card or the spoken stem | enabled, placeholder points at the card |
+| `question-gap`, retries left | one timeline live row “正在准备下一个问题…”, refetching on a 2s timer up to two retries | enabled |
+| `question-gap`, retries spent | “没有拿到下一个问题。” and a 44px “重新加载” | enabled |
+| `choice-pending` | the answered card (`Check` + “已选择”, a top row “正在记录…”) and the same live row from “正在记录本次选择…” through the follow-up turn | disabled, stop visible |
+| `candidates` | the offer cards under the message that offered them | enabled |
+| `adopting` | “正在采用 HH:MM…” through the follow-up turn | disabled during the chain |
+| `confirmed` | “已确认校正时间：HH:MM” | enabled |
+| `readonly` | “该校正已结束，只能查看历史。” and “再次校正” | disabled |
+| stopped | the row settles with what streamed; notice “已停止，已生成的内容保留；本次不会扣点。” | enabled |
+
+- **Rules:** a follow-up turn continues on the live row already in place; `busy` never drops in the middle of a chain. No copy may ask the reader to wait for the server; a gap is a live row with retries, then a reload button. A hydration that timed out is the same gap. A 402 shows “校正点数不足，正在前往兑换…” for 600ms before the page leaves.
+- **Board:** before any candidate exists the header clock shows the declared birth minute and the body reads “填报出生时间 HH:MM” / “回答几个问题后，这里会显示宫位随时间的变化。”; the column narrows to `minmax(16rem, 18rem)` (`is-board-empty`) and widens once a result arrives. No house table is invented for the declared time; the snapshot API does not provide one.
+- **Accessibility:** the sidebar opening note sets `aria-busy`; the live row is the timeline row (`role="status"` shimmer label); the reload and start actions are real 44px buttons.
+
 ### Birth time intake
 
 - **Structure:** birth date, five radio choice rows for time knowledge, then only the time, uncertainty, period, or clue field required by the selected source.
@@ -407,6 +432,8 @@ or user IDs.
 
 Agent 的 live 标记只有 `InlineSpinner` 一种。曾经并存的 canvas 小球（`thinking-orbs`）已移除，不得再引入第二种 live 标记。
 
+校正面的所有等待复用行内等待：进入前的 hydration 在揭幕之前完成，进入后唯一的等待形态是时间线 live 行（含「正在准备下一个问题…」这一条独立 live 行）。
+
 首页只揭幕一次。揭幕前的加载屏分两阶段：先取账户、模型目录与会话列表，再并行取当前会话消息、推荐问题、今日星语与校正入口摘要，并预热校正分包；全部就绪或 4 秒预算到期（`BOOTSTRAP_PREPARE_TIMEOUT_MS`）才揭幕。揭幕后不得再出现任何阻塞等待或组件级 spinner：推荐问题未到显示安全默认问题，今日星语未到显示静态文案「今天的星语还没写出来。」（不带 `aria-busy`），校正卡用无摘要文案，内容到达后静默替换。切换到消息尚未缓存的会话时消息区留白并只给 `sr-only` 文案，不转圈；揭幕后按侧栏顺序后台预取最近 5 条会话（`SESSION_PREFETCH_COUNT`）让常见切换零等待。轨道环消失后不得再换一套动效继续等。
 
 Admin 的 antd `<Spin>` 是独立设计系统，不在此表。