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Merge branch 'master' into agent/web-bash-error-expand

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32 fichiers modifiés avec 1355 ajouts et 182 suppressions
  1. 2 2
      .agents/notes/implemented/architecture/2026-07-28-directory-picker-capability-seam.i18n.yaml
  2. 0 1
      .agents/notes/implemented/architecture/2026-07-28-directory-picker-capability-seam.md
  3. 0 1
      .agents/notes/implemented/architecture/2026-07-28-directory-picker-capability-seam.zh.md
  4. 2 2
      .agents/notes/implemented/feature/2026-07-27-trajectory-inspection-ledger.i18n.yaml
  5. 6 2
      .agents/notes/implemented/feature/2026-07-27-trajectory-inspection-ledger.md
  6. 6 2
      .agents/notes/implemented/feature/2026-07-27-trajectory-inspection-ledger.zh.md
  7. 30 0
      apps/web/tests/navigation-panes.e2e.ts
  8. 1 0
      apps/web/tests/scaffold.ts
  9. 2 1
      apps/web/tests/snapshots/navigation-panes/trajectory.expected.md
  10. 2 1
      apps/web/tests/snapshots/workspace-management/directory-browser.expected.md
  11. 40 2
      apps/web/tests/workspace-management.e2e.ts
  12. 20 0
      packages/client/ui-conversation/src/client/skeleton/ConversationRoot.module.css
  13. 1 1
      packages/client/ui-primitives/src/Tooltip.module.css
  14. 32 8
      packages/client/ui-primitives/src/Tooltip.tsx
  15. 27 1
      packages/client/ui-primitives/tests/tooltip.spec.tsx
  16. 2 2
      packages/client/ui-trajectory/README.i18n.yaml
  17. 1 1
      packages/client/ui-trajectory/README.md
  18. 1 1
      packages/client/ui-trajectory/README.zh.md
  19. 87 13
      packages/client/ui-trajectory/src/client/TrajectoryTable.module.css
  20. 25 1
      packages/client/ui-trajectory/src/client/TrajectoryTable.tsx
  21. 38 11
      packages/client/ui-trajectory/src/client/TrajectoryTimeline.module.css
  22. 188 38
      packages/client/ui-trajectory/src/client/TrajectoryTimeline.tsx
  23. 1 1
      packages/client/ui-trajectory/src/client/TrajectoryView.tsx
  24. 3 13
      packages/client/ui-trajectory/src/client/views.module.css
  25. 47 0
      packages/client/ui-trajectory/tests/table.spec.tsx
  26. 147 2
      packages/client/ui-trajectory/tests/views.spec.tsx
  27. 2 2
      packages/host/directory-picker-browse/README.i18n.yaml
  28. 0 1
      packages/host/directory-picker-browse/README.md
  29. 0 1
      packages/host/directory-picker-browse/README.zh.md
  30. 51 8
      packages/host/directory-picker-browse/src/client/DirectoryBrowser.module.css
  31. 257 50
      packages/host/directory-picker-browse/src/client/DirectoryBrowser.tsx
  32. 334 13
      packages/host/directory-picker-browse/tests/directory-browser.spec.tsx

+ 2 - 2
.agents/notes/implemented/architecture/2026-07-28-directory-picker-capability-seam.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/architecture/2026-07-28-directory-picker-capability-seam.md
-2026-07-28-directory-picker-capability-seam.md: 9884385cf9e0d51604bab9e4fd3c4bee77448331
-2026-07-28-directory-picker-capability-seam.zh.md: 8c229b9fb08d5052ba8a512f2153a89a9e5fd455
+2026-07-28-directory-picker-capability-seam.md: 01968990db81852dbf965a90fc151bab357ecb55
+2026-07-28-directory-picker-capability-seam.zh.md: ffbb939eabcca3e16711a4cadcadad50660a9e04

Fichier diff supprimé car celui-ci est trop grand
+ 0 - 1
.agents/notes/implemented/architecture/2026-07-28-directory-picker-capability-seam.md


Fichier diff supprimé car celui-ci est trop grand
+ 0 - 1
.agents/notes/implemented/architecture/2026-07-28-directory-picker-capability-seam.zh.md


+ 2 - 2
.agents/notes/implemented/feature/2026-07-27-trajectory-inspection-ledger.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-07-27-trajectory-inspection-ledger.md
-2026-07-27-trajectory-inspection-ledger.md: 8c2a7c42b7898776de5d42459b09c0fb1737ec0b
-2026-07-27-trajectory-inspection-ledger.zh.md: 6c5733046dc2cfd3fd2bd005f4cf5c2d2bd110af
+2026-07-27-trajectory-inspection-ledger.md: cdeaa30ea64f47b0e0110baf566f747a4591a384
+2026-07-27-trajectory-inspection-ledger.zh.md: df2a3d266161a7c1c4444863971f3d177533af8c

+ 6 - 2
.agents/notes/implemented/feature/2026-07-27-trajectory-inspection-ledger.md

@@ -21,7 +21,9 @@ Trajectory has to make prose, machine payloads, token usage, timing, and nested
 - Call schemas come from the active recorded Request header. Keyless snapshot fixtures deliberately replace that catalog with the non-array `{{tools}}` token, which the durable inspection boundary treats as unavailable instead of attempting to project or fabricate schemas.
 - Selecting a record or Request opens an inspector inside Trajectory. Tabs and Summary sections follow the selected entity: Markdown messages expose rendered, source, provenance, and hierarchy views; tools add JSON payload/result and schema views; Requests add options, usage, timing, and result navigation. Images render as media rather than serialized data.
 - Turn folding removes all rows after its first record and replaces them with a compact step/tool-call count; Assistant folding applies the same interaction to its tool-call descendants. Global controls fold or expand both levels.
-- The separate Waterfall tab is removed. A fixed Overview above the ledger projects every record with known `startedAt` onto three semantic timing lanes using its own duration. Dragging left or right commits an inclusive interval filter: any record whose active interval overlaps either boundary remains visible, records without known timing leave the focused ledger, and clearing the selection restores the full branch. The Overview keeps the full time domain while focused so the selection can be resized or cleared without losing orientation.
+- The separate Waterfall tab is removed. A fixed Overview above the ledger projects every record with known `startedAt` onto three semantic timing lanes using its own duration. Finalized Assistant spans divide the recorded interval at the first non-empty token delta, so distinct TTFT and decoding colors retain their actual ratio; incomplete timing falls back to one Assistant color. Hovering for 500 ms exposes exact start/end, total duration, TTFT, and decoding time without relying on the browser's native tooltip delay. Dragging left or right commits an inclusive interval filter: any record whose active interval overlaps either boundary remains visible, records without known timing leave the focused ledger, and clearing the selection restores the full branch. Wheel gestures zoom the time domain. A right-button click clears the interval selection; dragging instead pans an already zoomed viewport without mutating it. The Overview keeps the full time domain while focused so the selection can be resized or cleared without losing orientation.
+- Live history updates retain the ledger's bottom position only while the user is already following its tail. Scrolling upward clears that follow state, so streamed chunks and newly appended records do not interrupt inspection of earlier rows.
+- Trajectory opts into a conversation-owned composer overlay through `data-conversation-composer-overlay`. `ConversationRoot` positions the composer seat and publishes its live height; Trajectory keeps the ledger at full height and reserves that height plus 16 px inside its vertical table and inspector scrollers. Those panes adapt to the available width instead of exposing horizontal scrollbars beneath the overlay.
 - This local inspector remains independent from the conversation-wide Chat details column. At narrow widths it overlays the ledger and remains dismissible by keyboard or pointer.
 
 ## Alternatives considered
@@ -34,10 +36,12 @@ Trajectory has to make prose, machine payloads, token usage, timing, and nested
 
 **Reuse the global Chat details column.** Rejected: it would couple local inspection to conversation navigation and make a row click unexpectedly change another view's state.
 
+**Override the composer seat from Trajectory CSS.** Rejected: a cross-package selector would depend on generated class specificity and stylesheet order. An explicit view marker keeps seat geometry and active-phase precedence in `ConversationRoot`, while Trajectory owns only its internal clearance.
+
 **Keep timing in a separate Waterfall tab.** Rejected: the placeholder summarized node counts rather than record timing and forced users to switch away from the rows they wanted to focus. A full-domain Overview keeps timing and filtered records in one visual context.
 
 **Change global theme tokens to match the reference.** Rejected: the existing theme already provides paired light and dark semantic layers, and a local redesign does not justify changing unrelated surfaces.
 
 ## Consequences
 
-Trajectory shows more useful records per viewport while retaining Turn and Request orientation. Context rewrites and compactions remain inline with their surrounding history, while a rewind begins a successor branch that inherits only the retained prefix. The main ledger omits token usage and duration so content receives the available width; the local inspector exposes those facts together with full payloads, provenance, schemas, and request timing. The Overview uses recorded start/duration facts without fabricating live elapsed time, and its inclusive focus behavior matches the interaction users already know from Chrome DevTools Network. Focused component tests pin projection, folding, record and interval selection, entity-specific tabs, and running/error semantics; the assembled Web snapshot pins the ledger, Overview, and inspector through the real client composition.
+Trajectory shows more useful records per viewport while retaining Turn and Request orientation. Context rewrites and compactions remain inline with their surrounding history, while a rewind begins a successor branch that inherits only the retained prefix. The floating composer leaves the ledger visible to the viewport edge without covering its final rows or hiding horizontal controls. The main ledger omits token usage and duration so content receives the available width; the local inspector exposes those facts together with full payloads, provenance, schemas, and request timing. The Overview uses recorded start/duration and token-boundary facts without fabricating live elapsed time, and its inclusive focus behavior matches the interaction users already know from Chrome DevTools Network. Focused component tests pin tail following, timing projection, delayed detail disclosure, folding, record and interval selection, entity-specific tabs, and running/error semantics; the assembled Web snapshot pins the ledger, Overview timing details, composer overlay geometry, and inspector through the real client composition.

+ 6 - 2
.agents/notes/implemented/feature/2026-07-27-trajectory-inspection-ledger.zh.md

@@ -21,7 +21,9 @@ Status: implemented
 - 调用 schema 来自当前生效且已记录的请求头。无密钥快照 fixture(测试前置数据)有意将该目录替换为非数组 token `{{tools}}`,持久化检查边界会将其视为不可用,而不是尝试投影或虚构 schema。
 - 选择记录或请求后,轨迹视图内部会打开检查器,其标签页和概览区域随实体类型变化:Markdown 消息提供渲染、源码、来源和层级视图;工具提供 JSON 载荷/结果和 schema 视图;请求提供选项、用量、计时和结果跳转。图片以媒体形式渲染,而不是显示为序列化数据。
 - 折叠轮次时保留其第一条记录,将后续行替换为紧凑的步骤和工具调用数量;折叠助手时对其工具调用后代应用相同交互。全局控件可以分别折叠或展开这两个层级。
-- 移除独立的 waterfall(瀑布式事件)标签页。固定在记录表上方的 Overview 区域将所有 `startedAt` 已知的记录按各自耗时投影到三条语义计时轨道。向左或向右拖动会提交包含边界的区间筛选:任何活动区间与所选区间相交的记录都会保留,计时未知的记录会从聚焦后的记录表中移除,清除选择则恢复完整分支。聚焦后,Overview 区域仍保留完整时间范围,以便在不失去方位的情况下调整或清除选择。
+- 移除独立的 waterfall(瀑布式事件)标签页。固定在记录表上方的 Overview 区域将所有 `startedAt` 已知的记录按各自耗时投影到三条语义计时轨道。已完成的助手时间条以首个非空 token 增量为分界,用不同颜色按真实比例表示 TTFT 与解码时间;计时不完整时退化为单一助手色。悬停 500 ms 后会显示精确起止时刻、总耗时、TTFT 和解码时间,而不依赖浏览器原生 tooltip 的延迟。向左或向右拖动会提交包含边界的区间筛选:任何活动区间与所选区间相交的记录都会保留,计时未知的记录会从聚焦后的记录表中移除,清除选择则恢复完整分支。滚轮手势用于缩放时间域。右键单击会清除区间选择;右键拖动则只会平移已放大的 viewport,不会改变该选区。聚焦后,Overview 区域仍保留完整时间范围,以便在不失去方位的情况下调整或清除选择。
+- 实时历史更新仅在用户已经跟随记录表末尾时保留底部位置。向上滚动会清除跟随状态,因此流式分块和新追加的记录不会打断对旧记录的检查。
+- Trajectory 通过 `data-conversation-composer-overlay` 启用由会话持有的 composer 浮层模式。`ConversationRoot` 负责定位 composer seat 并发布其实时高度;Trajectory 让记录表保持全高,并在记录表与检查器的纵向滚动容器内预留该高度加 16 px。这两个窗格会根据可用宽度自适应,而不会在浮层下方暴露横向滚动条。
 - 此局部检查器与会话级 Chat 详情栏相互独立。在窄屏下,检查器会覆盖记录表,并且仍可通过键盘或指针关闭。
 
 ## 曾考虑的替代方案
@@ -34,10 +36,12 @@ Status: implemented
 
 **复用全局 Chat 详情栏。** 不予采纳:这会让局部检查与会话导航耦合,还会使行点击意外改变另一个视图的状态。
 
+**由 Trajectory CSS 覆盖 composer seat。** 不予采纳:跨包(package)选择器会依赖生成类选择器的优先级和样式表顺序。显式视图标记让 seat 几何形状和活跃阶段优先级留在 `ConversationRoot` 中,而 Trajectory 只负责自身内部的避让空间。
+
 **将计时保留在独立的 waterfall 标签页中。** 不予采纳:占位实现汇总的是节点数而非记录计时,并迫使用户离开想要聚焦的记录。保留完整时间范围的 Overview 区域让计时和筛选后的记录处于同一视觉上下文中。
 
 **修改全局主题 token 以匹配参考设计。** 不予采纳:现有主题已经提供配对的亮色与暗色语义层,局部重新设计不足以成为修改无关表面的理由。
 
 ## 后果
 
-轨迹视图在保留轮次与请求定位的同时,每个视口可以显示更多有效记录。上下文 `rewrite` 与压缩保持在周边历史中的原始位置,`rewind` 则建立仅继承保留前缀的后继分支。主记录表省略 token 用量和耗时,让内容获得可用宽度;局部检查器展示这些数据以及完整载荷、来源、schema 和请求计时。Overview 区域使用记录的开始时间与耗时数据,而不虚构实时流逝时间,其包含边界的聚焦行为与用户熟悉的 Chrome DevTools Network 交互一致。针对性组件测试锁定投影、折叠、记录与区间选择、实体特定标签页和运行/错误语义;组装后的 Web 快照则通过真实客户端组合锁定记录表、Overview 区域与检查器。
+轨迹视图在保留轮次与请求定位的同时,每个视口可以显示更多有效记录。上下文 `rewrite` 与压缩保持在周边历史中的原始位置,`rewind` 则建立仅继承保留前缀的后继分支。浮动 composer 让记录表一直显示到视口边缘,同时不会遮住最后几行,也不会隐藏横向控件。主记录表省略 token 用量和耗时,让内容获得可用宽度;局部检查器展示这些数据以及完整载荷、来源、schema 和请求计时。Overview 区域使用记录的开始时间、耗时与 token 边界数据,而不虚构实时流逝时间,其包含边界的聚焦行为与用户熟悉的 Chrome DevTools Network 交互一致。针对性组件测试锁定末尾跟随、计时投影、延迟展示详情、折叠、记录与区间选择、实体特定标签页和运行/错误语义;组装后的 Web 快照则通过真实客户端组合锁定记录表、Overview 计时详情、composer 浮层几何形状与检查器。

+ 30 - 0
apps/web/tests/navigation-panes.e2e.ts

@@ -138,6 +138,23 @@ describe('web e2e: navigation & panes over a rich seeded session', () => {
     onTestFailed(() => saveFailureShot(page, 'web-e2e-navigation-trajectory'))
     await page.getByRole('tab', { name: 'Trajectory' }).click()
     await page.waitForTimeout(100)
+    const overlayLayout = await page.getByRole('table').evaluate((table) => {
+      const host = table.closest('[data-conversation-scroll]')
+      const seat = host?.querySelector('[data-composer-seat]') ?? null
+      const pane = table.parentElement
+      return {
+        hostPosition: host === null ? null : getComputedStyle(host).position,
+        paneOverflowX: pane === null ? null : getComputedStyle(pane).overflowX,
+        paneScrollableWidth: pane === null ? null : pane.scrollWidth - pane.clientWidth,
+        seatPosition: seat === null ? null : getComputedStyle(seat).position,
+      }
+    })
+    expect(overlayLayout).toEqual({
+      hostPosition: 'relative',
+      paneOverflowX: 'hidden',
+      paneScrollableWidth: 0,
+      seatPosition: 'absolute',
+    })
     expect({
       pageErrors: tripwire.pageErrors,
       slotErrors,
@@ -153,6 +170,8 @@ describe('web e2e: navigation & panes over a rich seeded session', () => {
     await page.locator('tr[data-kind="tool"]').first().click()
     const details = page.getByRole('complementary', { name: 'Event details' })
     await expect.poll(() => details.count(), { timeout: 10_000 }).toBe(1)
+    expect(await details.getByRole('tabpanel').evaluate(panel => getComputedStyle(panel).overflowX))
+      .toBe('hidden')
     await page.evaluate(() => { document.body.setAttribute('data-ds-dark-theme', '') })
     const darkSummarySurfaces = await details.getByRole('heading', { name: 'Payload' }).evaluate(heading => ({
       heading: getComputedStyle(heading).backgroundColor,
@@ -162,6 +181,17 @@ describe('web e2e: navigation & panes over a rich seeded session', () => {
     await page.evaluate(() => { document.body.removeAttribute('data-ds-dark-theme') })
     await page.getByRole('tab', { name: 'Result' }).click()
     await expect.poll(() => page.getByText('NAVIGATION_OK', { exact: false }).count(), { timeout: 10_000 }).toBeGreaterThanOrEqual(1)
+    const assistantSpan = page.locator('[data-timeline-span="message"][data-assistant-timing="true"]').first()
+    await assistantSpan.hover()
+    const timingTooltip = page.getByRole('tooltip')
+    await timingTooltip.waitFor({ timeout: 5_000 })
+    await expect.poll(() => timingTooltip.textContent(), { timeout: 5_000 }).toMatch(/TTFT .* Decoding/)
+    const assistantTimingStyle = await assistantSpan.evaluate(node => ({
+      background: getComputedStyle(node).backgroundImage,
+      ttft: getComputedStyle(node).getPropertyValue('--trajectory-assistant-ttft'),
+    }))
+    expect(assistantTimingStyle.background).toContain('linear-gradient')
+    expect(assistantTimingStyle.ttft).toMatch(/%$/)
     const snapshot = (await captureStableAria(page, '[class*="viewArea"]', scaffold.workspaceCwd))
       .split(SEED_ID).join('{{seededId}}')
     await compareOrRefreshGolden(TRAJECTORY_EXPECTED, snapshot, MODE)

+ 1 - 0
apps/web/tests/scaffold.ts

@@ -516,6 +516,7 @@ function normalizeAria(snapshot: string, workspaceCwd: string): string {
     // shape so goldens stay stable across midnight and year boundaries.
     .replace(/\d{4}年\d{1,2}月\d{1,2}日 \d{2}:\d{2}/g, '{{clock}}')
     .replace(/\d{1,2}月\d{1,2}日 \d{2}:\d{2}/g, '{{clock}}')
+    .replace(/(?<!\d)\d{1,2}:\d{2}:\d{2}(?:\.\d+)?(?:\s*[AP]M)?(?!\d)/gi, '{{clock}}')
     .replace(/(?<!\d)\d{2}:\d{2}(?!\d)/g, '{{clock}}')
 }
 

+ 2 - 1
apps/web/tests/snapshots/navigation-panes/trajectory.expected.md

@@ -4,7 +4,8 @@
   - button "Collapse calls": Calls
   - img
   - searchbox "Search trajectory"
-- region "Trajectory timeline"
+- region "Trajectory timeline":
+  - tooltip "ASSISTANT {{clock}} → {{clock}} Total 1.5 s · TTFT 368 ms · Decoding 1.2 s"
 - table:
   - rowgroup:
     - row "SYSTEM, Initial System Prompt":

+ 2 - 1
apps/web/tests/snapshots/workspace-management/directory-browser.expected.md

@@ -4,7 +4,8 @@
     - button "Home"
     - img
     - button "browse-golden"
-  - button "Edit path"
+  - button "Edit path":
+    - img
   - list:
     - listitem:
       - button "adopted":

+ 40 - 2
apps/web/tests/workspace-management.e2e.ts

@@ -1,6 +1,7 @@
 // Web e2e scenarios: workspace management — adding a workspace through the
 // composed directory dialog (its own New folder affordance is the product's
-// one creation route), same-basename directory adoption, the rename round
+// one creation route), the dialog's path editor walking the panes with the
+// typed draft, same-basename directory adoption, the rename round
 // trip over the real wire (workspace.rename RPC + durable registry), the
 // duplicate-name pre-check, the
 // flat "In one list" view with its persisted group-by preference, the session
@@ -12,7 +13,7 @@
 // seeded-history seed reused verbatim — no new recording).
 import { mkdir, readFile, stat, writeFile } from 'node:fs/promises'
 import { fileURLToPath } from 'node:url'
-import { join } from 'node:path'
+import { join, sep } from 'node:path'
 import type { Browser, Locator, Page } from 'playwright'
 import { chromium } from 'playwright'
 import { afterAll, beforeAll, describe, expect, it, onTestFailed } from 'vitest'
@@ -403,6 +404,43 @@ describe('web e2e: workspace management (create / rename / flat view / hover aff
     expect(tripwire.pageErrors).toEqual([])
   }, 60_000)
 
+  it('walks the panes with the typed path: deeper past a separator, back up on erase, whole on a miss', async () => {
+    // The panes must track the draft without leaving the editor, so the
+    // typed text and what is listed under it never disagree.
+    // Staged by this scenario itself (mkdir is recursive and idempotent), so
+    // running it alone through -t sees the same tree the assertions describe.
+    const staged = join(scaffold.workspaceCwd, 'browse-golden')
+    await mkdir(join(staged, 'alpha', 'only-under-alpha'), { recursive: true })
+    await mkdir(join(staged, 'beta'), { recursive: true })
+    const dialog = await browseTo(staged)
+    await expect.poll(() => dialog.getByText('alpha', { exact: true }).count(), { timeout: 10_000 }).toBe(1)
+    await dialog.getByRole('button', { name: 'Edit path' }).click()
+    const path = dialog.getByLabel('Edit path')
+    // A directory part no pane lists: the panes walk to it, landing the
+    // ordinary two-pane Miller view (level | its children) with the editor
+    // still up and the draft intact.
+    await path.fill(`${join(staged, 'alpha')}${sep}`)
+    await expect.poll(() => dialog.getByText('only-under-alpha', { exact: true }).count(), { timeout: 10_000 }).toBe(1)
+    await expect.poll(() => dialog.getByRole('list').count(), { timeout: 10_000 }).toBe(2)
+    expect(await path.inputValue()).toBe(`${join(staged, 'alpha')}${sep}`)
+    // Erasing back past the separator walks the panes up, so the level being
+    // typed is the last pane again (its children no longer stand to its
+    // right) and the tail filters it.
+    await path.fill(`${staged}${sep}al`)
+    await expect.poll(() => dialog.getByText('only-under-alpha', { exact: true }).count(), { timeout: 10_000 }).toBe(0)
+    expect(await dialog.getByText('alpha', { exact: true }).count()).toBe(1)
+    expect(await dialog.getByText('beta', { exact: true }).count()).toBe(0)
+    await expect.poll(() => dialog.getByRole('list').count(), { timeout: 10_000 }).toBe(2)
+    // A tail nobody matches is a name still being spelled: the level shows
+    // whole instead of emptying under it.
+    await path.fill(`${staged}${sep}zzz`)
+    await expect.poll(() => dialog.getByText('beta', { exact: true }).count(), { timeout: 10_000 }).toBe(1)
+    expect(await dialog.getByText('alpha', { exact: true }).count()).toBe(1)
+    await dialog.getByRole('button', { name: 'Cancel' }).click()
+    await dialog.waitFor({ state: 'hidden', timeout: 10_000 })
+    expect(tripwire.pageErrors).toEqual([])
+  }, 60_000)
+
   /**
    * Expand Ungrouped and return its seeded session row. The only visible child
    * is the non-blank persisted Session; the blank Session created while

+ 20 - 0
packages/client/ui-conversation/src/client/skeleton/ConversationRoot.module.css

@@ -208,6 +208,26 @@
   );
 }
 
+/* Views may opt into a composer overlay while ConversationRoot retains
+   ownership of the seat geometry and its active-phase precedence. */
+.scrollBody:has([data-conversation-composer-overlay]) {
+  position: relative;
+  overflow: hidden;
+}
+
+.scrollBody:has([data-conversation-composer-overlay]) > .viewArea {
+  flex: 1 1 0;
+  min-height: 0;
+  overflow: hidden;
+}
+
+.scrollBody:has([data-conversation-composer-overlay]) > .composerSeat {
+  position: absolute;
+  right: 0;
+  bottom: 0;
+  left: 0;
+}
+
 /* Hero phase: the composer stack (hero chrome + workspace row + card) is
    flex-centered in the column; composer phase docks it at the bottom. Flex,
    NOT absolute+transform: a transform would make this box the containing

+ 1 - 1
packages/client/ui-primitives/src/Tooltip.module.css

@@ -14,7 +14,7 @@
   color: var(--dsw-static-neutral-bluish-00);
   font-size: 14px;
   line-height: 22px;
-  white-space: nowrap;
+  white-space: pre-line;
   pointer-events: none;
   animation: tooltip-in 150ms var(--ds-ease-in-out);
 }

+ 32 - 8
packages/client/ui-primitives/src/Tooltip.tsx

@@ -1,6 +1,6 @@
 // Hover/focus label bubble (figma tooltip pill: dark plate, white text).
-// TODO: interaction is a placeholder (no show delay, no flip on viewport
-// collision, no arrow) — visuals and behavior get a proper pass later.
+// TODO: interaction is a placeholder (no flip on viewport collision or
+// arrow) — visuals and behavior get a proper pass later.
 // The anchor is the child element itself (cloneElement, no wrapper node), so
 // attaching a tooltip never changes the anchor's layout context. The bubble is
 // position:fixed and coordinates come from the anchor's rect at show time, so
@@ -27,12 +27,13 @@ interface AnchorProps {
  * Attach a hover/focus tooltip to an anchor element.
  * @param props.label - bubble text.
  * @param props.side - placement relative to the anchor (default 'right').
+ * @param props.delayMs - hover delay in milliseconds; keyboard focus remains immediate.
  * @param props.disabled - suppress the bubble while true; the anchor renders identically so
  * toggling never remounts it (which would cut its CSS transitions).
  * @param props.children - a single anchor element; its own ref (callback or object) is forwarded alongside the tooltip's.
  * @returns the cloned anchor plus a fixed-position bubble while hovered/focused.
  */
-export function Tooltip({ label, side = 'right', disabled = false, children }: { label: string; side?: TooltipSide; disabled?: boolean; children: ReactElement<AnchorProps> }) {
+export function Tooltip({ label, side = 'right', delayMs = 0, disabled = false, children }: { label: string; side?: TooltipSide; delayMs?: number; disabled?: boolean; children: ReactElement<AnchorProps> }) {
   const anchor = useRef<HTMLElement | null>(null)
   // React 18 keeps the element's ref outside props; forward it so wrapping an
   // anchor in Tooltip never silently severs the owner's ref.
@@ -43,15 +44,26 @@ export function Tooltip({ label, side = 'right', disabled = false, children }: {
     else if (childRef != null) (childRef as MutableRefObject<HTMLElement | null>).current = el
   }, [childRef])
   const [pos, setPos] = useState<{ x: number; y: number } | null>(null)
+  const showTimer = useRef<ReturnType<typeof setTimeout> | null>(null)
   // Hover and focus are independent triggers: the bubble hides only after
   // BOTH clear (hovering away from a focused anchor must not drop it).
   const triggers = useRef({ hover: false, focus: false })
 
   // Disabling mid-hover (e.g. clicking a rail control expands the sidebar)
   // must drop an already-visible bubble: no mouseleave fires.
+  const cancelShow = useCallback(() => {
+    if (showTimer.current === null) return
+    clearTimeout(showTimer.current)
+    showTimer.current = null
+  }, [])
   useEffect(() => {
-    if (disabled) { triggers.current = { hover: false, focus: false }; setPos(null) }
-  }, [disabled])
+    if (disabled) {
+      cancelShow()
+      triggers.current = { hover: false, focus: false }
+      setPos(null)
+    }
+    return cancelShow
+  }, [cancelShow, disabled])
 
   const show = () => {
     if (disabled) return
@@ -63,7 +75,19 @@ export function Tooltip({ label, side = 'right', disabled = false, children }: {
       ? { x: r.right + 10, y: r.top + r.height / 2 }
       : { x: r.left + r.width / 2, y: r.bottom + 8 })
   }
+  const showAfterHoverDelay = () => {
+    cancelShow()
+    if (delayMs <= 0) {
+      show()
+      return
+    }
+    showTimer.current = setTimeout(() => {
+      showTimer.current = null
+      show()
+    }, delayMs)
+  }
   const hide = () => {
+    cancelShow()
     if (!triggers.current.hover && !triggers.current.focus) setPos(null)
   }
 
@@ -71,9 +95,9 @@ export function Tooltip({ label, side = 'right', disabled = false, children }: {
     <>
       {cloneElement(children, {
         ref: mergedRef,
-        onMouseEnter: (e) => { children.props.onMouseEnter?.(e); triggers.current.hover = true; show() },
-        onMouseLeave: (e) => { children.props.onMouseLeave?.(e); triggers.current.hover = false; setPos(null) },
-        onFocus: (e) => { children.props.onFocus?.(e); triggers.current.focus = true; show() },
+        onMouseEnter: (e) => { children.props.onMouseEnter?.(e); triggers.current.hover = true; showAfterHoverDelay() },
+        onMouseLeave: (e) => { children.props.onMouseLeave?.(e); triggers.current.hover = false; cancelShow(); setPos(null) },
+        onFocus: (e) => { children.props.onFocus?.(e); triggers.current.focus = true; cancelShow(); show() },
         onBlur: (e) => { children.props.onBlur?.(e); triggers.current.focus = false; hide() },
       })}
       {pos !== null && (

+ 27 - 1
packages/client/ui-primitives/tests/tooltip.spec.tsx

@@ -1,11 +1,37 @@
 // @vitest-environment jsdom
-import { cleanup, fireEvent, render, screen } from '@testing-library/react'
+import { act, cleanup, fireEvent, render, screen } from '@testing-library/react'
 import { afterEach, describe, expect, it, vi } from 'vitest'
 import { Tooltip } from '@deepseek-ai/dsh-client-ui-primitives'
 
 afterEach(cleanup)
 
 describe('Tooltip', () => {
+  it('can delay pointer hover without delaying keyboard focus', () => {
+    vi.useFakeTimers()
+    try {
+      render(
+        <Tooltip label="Timing details" delayMs={500}>
+          <button type="button">anchor</button>
+        </Tooltip>,
+      )
+      const anchor = screen.getByText('anchor')
+      fireEvent.mouseEnter(anchor)
+      act(() => { vi.advanceTimersByTime(499) })
+      expect(screen.queryByRole('tooltip')).toBeNull()
+      fireEvent.mouseLeave(anchor)
+      act(() => { vi.advanceTimersByTime(1) })
+      expect(screen.queryByRole('tooltip')).toBeNull()
+      fireEvent.mouseEnter(anchor)
+      act(() => { vi.advanceTimersByTime(500) })
+      expect(screen.getByRole('tooltip').textContent).toBe('Timing details')
+      fireEvent.mouseLeave(anchor)
+      fireEvent.focus(anchor)
+      expect(screen.getByRole('tooltip').textContent).toBe('Timing details')
+    } finally {
+      vi.useRealTimers()
+    }
+  })
+
   it('shows the bubble to the right on hover and hides it on leave', () => {
     render(
       <Tooltip label="Open sidebar">

+ 2 - 2
packages/client/ui-trajectory/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/client/ui-trajectory/README.md
-README.md: a65c11aed9dd74f9b0b60795441f876c1d64b3ad
-README.zh.md: 6e25d24c6b65673b3d003e624b6e0727be60c0e1
+README.md: 5d0ea3bbbbfca2b8c0ee02ed07ca956fbd377e11
+README.zh.md: 1bfff4c18ea2e834781e2c6cb76773595eeed5ad

+ 1 - 1
packages/client/ui-trajectory/README.md

@@ -2,7 +2,7 @@
 
 English | [中文](README.zh.md)
 
-Trajectory renders a turn-aware event ledger with selectable User, Assistant, Tool, and nested Subtool records. Thick rules mark Turn boundaries, compact inline markers identify Steps, and the main ledger keeps only index, event, and content; selection opens a local inspector for token usage, duration, Input, Output, and Timing. A standalone compaction request appears chronologically in its own `Between turns` section, while a numbered compaction remains inside its owning turn. A fixed Overview above the ledger projects real record start/duration timing from left to right; dragging an interval focuses the ledger on every record active at any point in that inclusive range, while clearing the selection restores the full branch. The runtime's independent history source supplies raw context lineage and projects cancellation-frozen Assistant and Tool records, so Trajectory neither reads nor changes the Chat conversation snapshot. The package remains a pure-consumer plugin (registers one view tab into the conversation's `'conversation.view'` slot ring, provides no service, declares no Context merge). Contract: api-contracts v3 §8.
+Trajectory renders a turn-aware event ledger with selectable User, Assistant, Tool, and nested Subtool records. Thick rules mark Turn boundaries, compact inline markers identify Steps, and the main ledger keeps only index, event, and content; selection opens a local inspector for token usage, duration, Input, Output, and Timing. A standalone compaction request appears chronologically in its own `Between turns` section, while a numbered compaction remains inside its owning turn. A fixed Overview above the ledger projects real record start/duration timing from left to right; Assistant spans divide recorded TTFT from decoding, and a 500 ms hover reveals exact clock and duration details. Dragging an interval focuses the ledger on every record active at any point in that inclusive range, while clearing the selection restores the full branch. Wheel gestures zoom the time domain. A right-button click clears the selected interval, while a right-button drag pans an already zoomed viewport without changing it. Streaming updates keep the ledger pinned only when it was already at the bottom, so reading earlier records suspends tail following. Trajectory asks the conversation shell to float the composer over the full-height ledger, while its responsive vertical scrollers reserve the composer's live height so final rows remain reachable. The runtime's independent history source supplies raw context lineage and projects cancellation-frozen Assistant and Tool records, so Trajectory neither reads nor changes the Chat conversation snapshot. The package remains a pure-consumer plugin (registers one view tab into the conversation's `'conversation.view'` slot ring, provides no service, declares no Context merge). Contract: api-contracts v3 §8.
 
 ## Model Experience
 

+ 1 - 1
packages/client/ui-trajectory/README.zh.md

@@ -2,7 +2,7 @@
 
 [English](README.md) | 中文
 
-Trajectory 渲染按轮次组织的事件记录表,其中可选择用户、助手、工具和嵌套子工具记录。较粗的分割线标示轮次边界,紧凑的行内标记标识步骤,主记录表仅保留索引、事件和内容;选择记录则会打开局部检查器,查看 token 用量、耗时、输入、输出和计时。独立运行的压缩(compaction)请求会按时间顺序显示在自己的 `Between turns` 区段中,而带数值所有者的压缩仍位于其所属轮次内。固定在记录表上方的 Overview 区域从左到右投影记录的真实开始时间与耗时;拖选一个区间会将记录表聚焦到活动区间与该闭区间有重叠的所有记录,清除选择则恢复完整分支。运行时的独立历史数据源提供原始上下文谱系,并投影因取消而冻结的助手和工具记录,因此 Trajectory 既不读取也不改变 Chat 会话快照。该包(package)保持为纯消费方插件(向会话的 `'conversation.view'` slot 环注册一个视图标签页,不提供服务,也不声明 Context 合并)。契约:api-contracts v3 §8。
+Trajectory 渲染按轮次组织的事件记录表,其中可选择用户、助手、工具和嵌套子工具记录。较粗的分割线标示轮次边界,紧凑的行内标记标识步骤,主记录表仅保留索引、事件和内容;选择记录则会打开局部检查器,查看 token 用量、耗时、输入、输出和计时。独立运行的压缩(compaction)请求会按时间顺序显示在自己的 `Between turns` 区段中,而带数值所有者的压缩仍位于其所属轮次内。固定在记录表上方的 Overview 区域从左到右投影记录的真实开始时间与耗时;助手时间条会区分记录到的 TTFT 与解码时间,悬停 500 ms 后可查看精确时刻和耗时详情。拖选一个区间会将记录表聚焦到活动区间与该闭区间有重叠的所有记录,清除选择则恢复完整分支。滚轮手势用于缩放时间域。右键单击会清除所选区间;在已放大的 viewport 上按住右键拖动则只会平移视图,不会改变该区间。仅当记录表在流式更新前已经位于底部时,更新才会保持贴底;向上阅读旧记录会暂停跟随。Trajectory 要求会话壳将 composer 作为浮层置于全高记录表上方;其响应式纵向滚动容器会预留 composer 的实时高度,确保仍可滚动到最后几行。运行时的独立历史数据源提供原始上下文谱系,并投影因取消而冻结的助手和工具记录,因此 Trajectory 既不读取也不改变 Chat 会话快照。该包(package)保持为纯消费方插件(向会话的 `'conversation.view'` slot 环注册一个视图标签页,不提供服务,也不声明 Context 合并)。契约:api-contracts v3 §8。
 
 ## 模型体验
 

+ 87 - 13
packages/client/ui-trajectory/src/client/TrajectoryTable.module.css

@@ -15,7 +15,9 @@
 .tablePane {
   flex: 1;
   min-width: 0;
-  overflow: auto;
+  overflow-x: hidden;
+  overflow-y: auto;
+  padding-bottom: var(--dsh-trajectory-bottom-clearance, 0px);
   container: trajectory-table / inline-size;
 }
 
@@ -27,7 +29,7 @@
   );
 
   width: 100%;
-  min-width: 480px;
+  min-width: 0;
   border-spacing: 0;
   table-layout: fixed;
   color: var(--dsw-alias-label-primary);
@@ -104,6 +106,11 @@
   border-bottom: 0;
 }
 
+.table tbody tr[data-request-only='true']:has(+ tr[data-request-only='true']) td {
+  /* Keep consecutive boundary markers from painting their halos over one another. */
+  height: 9px;
+}
+
 .table tbody tr[data-request-only='true']:last-child td {
   /* Retain the lower half of the 16px boundary marker at the table's end. */
   height: 9px;
@@ -277,7 +284,7 @@
   z-index: 3;
   top: 0;
   left: 0;
-  display: inline-flex;
+  display: inline-grid;
   flex: none;
   align-items: center;
   box-sizing: border-box;
@@ -292,8 +299,18 @@
   white-space: nowrap;
 }
 
+.turnLabelFull,
 .turnLabelCompact {
-  display: none;
+  grid-area: 1 / 1;
+  max-width: 64px;
+  overflow: hidden;
+  opacity: 1;
+  white-space: nowrap;
+}
+
+.turnLabelCompact {
+  max-width: 0;
+  opacity: 0;
 }
 
 .turnLabelActive {
@@ -350,15 +367,23 @@
 }
 
 .kindTagIcon {
-  display: none;
+  display: inline-flex;
+  flex: none;
   align-items: center;
   justify-content: center;
-  width: 13px;
+  width: 0;
   height: 13px;
+  overflow: hidden;
+  opacity: 0;
+  transform: scale(0.8);
 }
 
 .kindTagLabel {
-  display: inline;
+  display: inline-block;
+  max-width: 72px;
+  overflow: hidden;
+  opacity: 1;
+  white-space: nowrap;
 }
 
 .table .kindSlot .message {
@@ -393,19 +418,66 @@
   }
 
   .kindTagIcon {
-    display: inline-flex;
+    width: 13px;
+    opacity: 1;
+    transform: scale(1);
   }
 
   .kindTagLabel {
-    display: none;
+    max-width: 0;
+    opacity: 0;
   }
 
   .turnLabelFull {
-    display: none;
+    max-width: 0;
+    opacity: 0;
   }
 
   .turnLabelCompact {
-    display: inline;
+    max-width: 64px;
+    opacity: 1;
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  .eventColumn,
+  .event,
+  .requestBoundaryControl,
+  .kindSlot,
+  .kindTag,
+  .kindTagIcon,
+  .kindTagLabel,
+  .turnLabelFull,
+  .turnLabelCompact {
+    transition-duration: 180ms;
+    transition-timing-function: var(--ds-ease-in-out);
+  }
+
+  .eventColumn,
+  .kindSlot {
+    transition-property: width;
+  }
+
+  .event {
+    transition-property: padding-right, padding-left;
+  }
+
+  .requestBoundaryControl {
+    transition-property: left;
+  }
+
+  .kindTag {
+    transition-property: padding-right, padding-left;
+  }
+
+  .kindTagIcon {
+    transition-property: width, opacity, transform;
+  }
+
+  .kindTagLabel,
+  .turnLabelFull,
+  .turnLabelCompact {
+    transition-property: max-width, opacity;
   }
 }
 
@@ -834,7 +906,9 @@
 .detailBody {
   flex: 1;
   min-height: 0;
-  overflow: auto;
+  overflow-x: hidden;
+  overflow-y: auto;
+  padding-bottom: var(--dsh-trajectory-bottom-clearance, 0px);
   scrollbar-gutter: stable;
 }
 
@@ -842,7 +916,7 @@
   display: flex;
   box-sizing: border-box;
   flex-direction: column;
-  padding-bottom: 12px;
+  padding-bottom: calc(12px + var(--dsh-trajectory-bottom-clearance, 0px));
   overflow: hidden;
 }
 

+ 25 - 1
packages/client/ui-trajectory/src/client/TrajectoryTable.tsx

@@ -1,6 +1,6 @@
 /** Turn-aware trajectory event ledger with a local record inspector. */
 
-import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
 import type { CSSProperties, ReactNode } from 'react'
 import {
   IconChevronRightOutline14,
@@ -22,6 +22,8 @@ import { formatElapsedSeconds } from './trajectory-record.ts'
 import { trajectoryPreviewText, type TrajectoryTurnModel } from './layout.ts'
 import css from './TrajectoryTable.module.css'
 
+const BOTTOM_FOLLOW_THRESHOLD_PX = 2
+
 const KIND_LABEL: Record<TrajectoryCellKind, string> = {
   system: 'SYSTEM',
   user: 'USER',
@@ -1711,6 +1713,9 @@ export function TrajectoryTable({
   // ledger has rendered. Not-found leaves the request pending (`turns` in the
   // deps retries as history pages in); the ack clears the store field.
   const rootRef = useRef<HTMLDivElement>(null)
+  const tablePaneRef = useRef<HTMLDivElement>(null)
+  const followsTableTail = useRef(false)
+  const tableScrollInitialized = useRef(false)
   const pendingScrollIndex = useRef<number | null>(null)
   const openRecordSummaryRef = useRef(openRecordSummary)
   openRecordSummaryRef.current = openRecordSummary
@@ -1734,11 +1739,30 @@ export function TrajectoryTable({
       row.scrollIntoView({ behavior: 'smooth', block: 'center' })
     }
   })
+  useLayoutEffect(() => {
+    const pane = tablePaneRef.current
+    if (pane === null) return
+    if (!tableScrollInitialized.current) {
+      tableScrollInitialized.current = true
+      followsTableTail.current =
+        pane.scrollHeight - pane.clientHeight - pane.scrollTop
+          <= BOTTOM_FOLLOW_THRESHOLD_PX
+      return
+    }
+    if (followsTableTail.current) pane.scrollTop = pane.scrollHeight
+  }, [turns])
 
   return (
     <div ref={rootRef} className={css.split} style={splitStyle}>
       <div
+        ref={tablePaneRef}
         className={css.tablePane}
+        onScroll={(event) => {
+          const pane = event.currentTarget
+          followsTableTail.current =
+            pane.scrollHeight - pane.clientHeight - pane.scrollTop
+              <= BOTTOM_FOLLOW_THRESHOLD_PX
+        }}
         onClick={(event) => {
           if (event.target === event.currentTarget) clearAllSelections()
         }}

+ 38 - 11
packages/client/ui-trajectory/src/client/TrajectoryTimeline.module.css

@@ -7,6 +7,10 @@
   user-select: none;
 }
 
+.root :global([role='tooltip']) {
+  font: var(--dsw-font-xxxs-11);
+}
+
 .plot {
   display: grid;
   grid-template-columns: 44px minmax(0, 1fr);
@@ -53,6 +57,10 @@
   touch-action: none;
 }
 
+.track[data-panning='true'] {
+  cursor: grabbing;
+}
+
 .empty {
   position: absolute;
   top: 50%;
@@ -105,8 +113,15 @@
 .span {
   position: absolute;
   top: calc(var(--trajectory-span-lane) * 14px);
-  left: calc(var(--trajectory-span-left) + 1px);
-  width: max(2px, calc(var(--trajectory-span-width) - 2px));
+  left: calc(var(--trajectory-span-left) + var(--trajectory-span-gap));
+  width: max(
+    2px,
+    calc(
+      var(--trajectory-span-width)
+      - var(--trajectory-span-gap)
+      - var(--trajectory-span-gap)
+    )
+  );
   height: 8px;
   min-width: 2px;
   border-radius: 1px;
@@ -127,23 +142,35 @@
 }
 
 .span[data-timeline-span='message'] {
-  background: color-mix(
+  --trajectory-assistant-decoding-color: color-mix(
     in srgb,
     var(--dsw-alias-brand-primary-new-colorprimary-new-color) 60%,
     var(--dsw-alias-state-error-secondary)
   );
+  --trajectory-assistant-ttft-color: color-mix(
+    in srgb,
+    var(--trajectory-assistant-decoding-color) 54%,
+    var(--dsw-alias-bg-layer-2)
+  );
+
+  background: var(--trajectory-assistant-decoding-color);
+  opacity: 1;
 }
 
-.span[data-timeline-span='tool'] {
-  background: var(--dsw-alias-state-warn-label);
+.span[data-timeline-span='message'][data-assistant-timing='true'] {
+  background: linear-gradient(
+    to right,
+    var(--trajectory-assistant-ttft-color) 0,
+    var(--trajectory-assistant-ttft-color) var(--trajectory-assistant-ttft),
+    var(--trajectory-assistant-decoding-color) var(--trajectory-assistant-ttft),
+    var(--trajectory-assistant-decoding-color) 100%
+  );
 }
 
+.span[data-timeline-span='tool'],
 .span[data-timeline-span='subtool'] {
-  background: color-mix(
-    in srgb,
-    var(--dsw-alias-state-warn-label) 62%,
-    var(--dsw-alias-label-tertiary)
-  );
+  background: var(--dsw-alias-state-warn-label);
+  opacity: 1;
 }
 
 .span[data-error='true'] {
@@ -161,7 +188,7 @@
 
 .span[data-hovered='true']:not([data-current='true']) {
   z-index: 1;
-  opacity: 0.78;
+  opacity: 1;
   box-shadow:
     0 0 0 1px var(--dsw-alias-bg-layer-2),
     0 0 0 2px color-mix(

+ 188 - 38
packages/client/ui-trajectory/src/client/TrajectoryTimeline.tsx

@@ -4,7 +4,9 @@ import {
   memo, useEffect, useMemo, useRef, useState, type CSSProperties, type KeyboardEvent,
   type PointerEvent,
 } from 'react'
+import { Tooltip } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { TrajectoryTurnModel } from './layout.ts'
+import type { AssistantMetricDetail, TrajectoryCellKind, TrajectoryCellProps } from './trajectory-record.ts'
 import {
   deriveTrajectoryTimeline,
   formatTimelineOffset,
@@ -18,6 +20,14 @@ const MINIMUM_ZOOM_OPERATIONS = 4
 const EDGE_PAN_ZONE_FRACTION = 0.08
 const EDGE_PAN_STEP_FRACTION = 0.025
 const MAXIMUM_EDGE_PAN_PX = 32
+const TIMELINE_TOOLTIP_DELAY_MS = 500
+
+interface TimelineRecordDetail {
+  decodingMs?: number
+  durationMs?: number
+  startedAt?: number
+  ttftMs?: number
+}
 
 interface FractionRange {
   start: number
@@ -29,6 +39,94 @@ interface HoverPoint {
   recordIndex: number | null
 }
 
+interface PanGesture {
+  anchorClientX: number
+  anchorStart: number
+  moved: boolean
+  pannable: boolean
+  pointerId: number
+}
+
+function assistantTimingDetail(
+  metrics: AssistantMetricDetail | undefined,
+): Pick<TimelineRecordDetail, 'ttftMs' | 'decodingMs'> {
+  const start = metrics?.stepStartTime
+  const first = metrics?.firstTokenTime
+  const completed = metrics?.completedTime
+  if (
+    metrics?.timingRecorded !== true
+    || typeof start !== 'number'
+    || typeof first !== 'number'
+    || typeof completed !== 'number'
+    || !Number.isFinite(start)
+    || !Number.isFinite(first)
+    || !Number.isFinite(completed)
+    || first < start
+    || completed < first
+  ) return {}
+  return { ttftMs: first - start, decodingMs: completed - first }
+}
+
+function timelineRecordDetail(cell: TrajectoryCellProps): TimelineRecordDetail {
+  const durationMs = cell.timeSeconds === null || !Number.isFinite(cell.timeSeconds)
+    ? undefined
+    : Math.max(0, cell.timeSeconds * 1_000)
+  const startedAt = cell.startedAt === null || !Number.isFinite(cell.startedAt)
+    ? undefined
+    : cell.startedAt
+  return {
+    ...(durationMs === undefined ? {} : { durationMs }),
+    ...(startedAt === undefined ? {} : { startedAt }),
+    ...assistantTimingDetail(cell.assistantMetrics),
+  }
+}
+
+function timelineKindLabel(kind: TrajectoryCellKind): string {
+  switch (kind) {
+    case 'system': return 'SYSTEM'
+    case 'user': return 'USER'
+    case 'context': return 'CONTEXT'
+    case 'compacted': return 'COMPACTED'
+    case 'message': return 'ASSISTANT'
+    case 'tool': return 'TOOL'
+    case 'subtool': return 'SUBTOOL'
+  }
+}
+
+function formatRecordedTime(timestamp: number): string {
+  return new Date(timestamp).toLocaleTimeString(undefined, {
+    hour: '2-digit',
+    minute: '2-digit',
+    second: '2-digit',
+    fractionalSecondDigits: 3,
+  })
+}
+
+function timelineTooltipLabel(
+  kind: TrajectoryCellKind,
+  detail: TimelineRecordDetail | undefined,
+): string {
+  const heading = timelineKindLabel(kind)
+  if (detail === undefined) return heading
+  const duration = detail.durationMs === undefined
+    ? null
+    : `Total ${formatTimelineOffset(detail.durationMs)}`
+  const range = detail.startedAt === undefined
+    ? null
+    : detail.durationMs === undefined
+      ? `Started ${formatRecordedTime(detail.startedAt)}`
+      : `${formatRecordedTime(detail.startedAt)} → ${formatRecordedTime(
+        detail.startedAt + detail.durationMs,
+      )}`
+  const segments = detail.ttftMs === undefined || detail.decodingMs === undefined
+    ? null
+    : `TTFT ${formatTimelineOffset(detail.ttftMs)} · Decoding ${formatTimelineOffset(
+      detail.decodingMs,
+    )}`
+  const timing = [duration, segments].filter(value => value !== null).join(' · ')
+  return [heading, range, timing].filter(value => value !== null && value !== '').join('\n')
+}
+
 /** Props for the fixed full-domain overview above the trajectory ledger. */
 export interface TrajectoryTimelineProps {
   turns: readonly TrajectoryTurnModel[]
@@ -105,14 +203,10 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
   onRecordFocus,
 }: TrajectoryTimelineProps) {
   const model = useMemo(() => deriveTrajectoryTimeline(turns, mode), [mode, turns])
-  const durationByIndex = useMemo(
+  const detailByIndex = useMemo(
     () => new Map(turns.flatMap(turn =>
       turn.groups.flatMap(group =>
-        group.cells.flatMap(cell =>
-          cell.timeSeconds === null || !Number.isFinite(cell.timeSeconds)
-            ? []
-            : [[cell.index, Math.max(0, cell.timeSeconds * 1_000)] as const],
-        ),
+        group.cells.map(cell => [cell.index, timelineRecordDetail(cell)] as const),
       ),
     )),
     [turns],
@@ -123,10 +217,12 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
     anchorClientX: number
     recordIndex: number | null
   } | null>(null)
+  const panRef = useRef<PanGesture | null>(null)
   const rootRef = useRef<HTMLElement | null>(null)
   const trackRef = useRef<HTMLDivElement | null>(null)
   const [draft, setDraft] = useState<TrajectoryTimeRange | null>(null)
   const [hover, setHover] = useState<HoverPoint | null>(null)
+  const [panning, setPanning] = useState(false)
   const [viewport, setViewport] = useState<TrajectoryTimeRange | null>(null)
   const [animateViewport, setAnimateViewport] = useState(false)
   useEffect(() => {
@@ -267,6 +363,21 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
   }
 
   const onPointerDown = (event: PointerEvent<HTMLDivElement>) => {
+    if (event.button === 2) {
+      panRef.current = {
+        anchorClientX: event.clientX,
+        anchorStart: domainStart,
+        moved: false,
+        pannable: viewport !== null,
+        pointerId: event.pointerId,
+      }
+      if (viewport !== null) setAnimateViewport(false)
+      setPanning(true)
+      if (typeof event.currentTarget.setPointerCapture === 'function') {
+        event.currentTarget.setPointerCapture(event.pointerId)
+      }
+      return
+    }
     if (event.button !== 0) return
     const anchor = fractionAt(event)
     const anchorTime = domainStart + anchor * domainDuration
@@ -285,10 +396,24 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
   }
 
   const onPointerMove = (event: PointerEvent<HTMLDivElement>) => {
-    const drag = dragRef.current
     const rect = event.currentTarget.getBoundingClientRect()
     const fraction = fractionAt(event)
     setHover({ fraction, recordIndex: recordIndexAt(event) })
+    const pan = panRef.current
+    if (pan !== null && pan.pointerId === event.pointerId) {
+      if (Math.abs(event.clientX - pan.anchorClientX) >= MINIMUM_DRAG_PX) {
+        pan.moved = true
+      }
+      if (!pan.pannable) return
+      const delta = (event.clientX - pan.anchorClientX) / Math.max(1, rect.width)
+      const nextStart = Math.min(
+        Math.max(pan.anchorStart - delta * domainDuration, model.start),
+        model.end - domainDuration,
+      )
+      setViewport({ start: nextStart, end: nextStart + domainDuration })
+      return
+    }
+    const drag = dragRef.current
     if (drag === null || drag.pointerId !== event.pointerId) return
     let nextDomainStart = domainStart
     if (viewport !== null) {
@@ -326,6 +451,15 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
   }
 
   const onPointerEnd = (event: PointerEvent<HTMLDivElement>) => {
+    const pan = panRef.current
+    if (pan !== null && pan.pointerId === event.pointerId) {
+      const moved = pan.moved
+        || Math.abs(event.clientX - pan.anchorClientX) >= MINIMUM_DRAG_PX
+      panRef.current = null
+      setPanning(false)
+      if (!moved) onRangeChange(null)
+      return
+    }
     const drag = dragRef.current
     if (drag === null || drag.pointerId !== event.pointerId) return
     const pointFraction = fractionAt(event)
@@ -375,8 +509,10 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
 
   const onPointerCancel = () => {
     dragRef.current = null
+    panRef.current = null
     setDraft(null)
     setHover(null)
+    setPanning(false)
   }
 
   return (
@@ -386,6 +522,7 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
         <div
           ref={trackRef}
           className={css.track}
+          data-panning={panning || undefined}
           aria-label="Timeline overview; drag horizontally to focus events"
           tabIndex={0}
           onKeyDown={onKeyDown}
@@ -394,7 +531,7 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
           onPointerUp={onPointerEnd}
           onPointerCancel={onPointerCancel}
           onPointerLeave={() => {
-            if (dragRef.current === null) setHover(null)
+            if (dragRef.current === null && panRef.current === null) setHover(null)
           }}
           onDoubleClick={(event) => {
             event.preventDefault()
@@ -402,9 +539,6 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
           }}
           onContextMenu={(event) => {
             event.preventDefault()
-            setAnimateViewport(false)
-            onRangeChange(null)
-            setViewport(null)
           }}
         >
           {hover !== null && hover.recordIndex === null && draft === null && (
@@ -466,7 +600,6 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
             className={css.lanes}
             data-animate-viewport={animateViewport || undefined}
             data-timeline-domain
-            aria-hidden="true"
             style={projectedDomainStyle}
           >
             {model.spans
@@ -476,34 +609,51 @@ export const TrajectoryTimeline = memo(function TrajectoryTimeline({
               .map((span) => {
                 const left = (span.start - model.start) / fullDuration
                 const width = (span.end - span.start) / fullDuration
-                const durationMs = durationByIndex.get(span.index)
+                const widthPercent = Math.max(width * 100, 0.35)
+                const detail = detailByIndex.get(span.index)
+                const ttftMs = detail?.ttftMs
+                const decodingMs = detail?.decodingMs
+                const ttftFraction = ttftMs === undefined
+                  || decodingMs === undefined
+                  || ttftMs + decodingMs <= 0
+                  ? null
+                  : ttftMs / (ttftMs + decodingMs)
                 return (
-                  <span
-                    className={css.span}
-                    data-timeline-span={span.kind}
-                    data-timeline-record-index={span.index}
-                    data-error={span.isError || undefined}
-                    data-equal-duration={mode === 'time' || undefined}
-                    data-current={span.index === selectedIndex || undefined}
-                    data-hovered={hover?.recordIndex === span.index || undefined}
-                    data-search-match={searchMatchIndexes === null
-                      ? undefined
-                      : searchMatchIndexes.has(span.index) ? 'true' : 'false'}
-                    data-selected={activeRange === null
-                      ? undefined
-                      : span.start <= activeRange.end && span.end >= activeRange.start
-                        ? 'true'
-                        : 'false'}
+                  <Tooltip
                     key={span.index}
-                    title={durationMs === undefined
-                      ? span.label
-                      : `${span.label} · ${formatTimelineOffset(durationMs)}`}
-                    style={{
-                      '--trajectory-span-left': `${left * 100}%`,
-                      '--trajectory-span-width': `${Math.max(width * 100, 0.35)}%`,
-                      '--trajectory-span-lane': span.lane,
-                    } as CSSProperties}
-                  />
+                    label={timelineTooltipLabel(span.kind, detail)}
+                    side="bottom"
+                    delayMs={TIMELINE_TOOLTIP_DELAY_MS}
+                  >
+                    <span
+                      aria-hidden="true"
+                      className={css.span}
+                      data-timeline-span={span.kind}
+                      data-timeline-record-index={span.index}
+                      data-assistant-timing={ttftFraction === null ? undefined : 'true'}
+                      data-error={span.isError || undefined}
+                      data-equal-duration={mode === 'time' || undefined}
+                      data-current={span.index === selectedIndex || undefined}
+                      data-hovered={hover?.recordIndex === span.index || undefined}
+                      data-search-match={searchMatchIndexes === null
+                        ? undefined
+                        : searchMatchIndexes.has(span.index) ? 'true' : 'false'}
+                      data-selected={activeRange === null
+                        ? undefined
+                        : span.start <= activeRange.end && span.end >= activeRange.start
+                          ? 'true'
+                          : 'false'}
+                      style={{
+                        '--trajectory-span-left': `${left * 100}%`,
+                        '--trajectory-span-width': `${widthPercent}%`,
+                        '--trajectory-span-gap': `clamp(0.25px, ${widthPercent * 0.08}%, 1px)`,
+                        '--trajectory-span-lane': span.lane,
+                        ...(ttftFraction === null
+                          ? {}
+                          : { '--trajectory-assistant-ttft': `${ttftFraction * 100}%` }),
+                      } as CSSProperties}
+                    />
+                  </Tooltip>
                 )
               })}
           </div>

+ 1 - 1
packages/client/ui-trajectory/src/client/TrajectoryView.tsx

@@ -459,7 +459,7 @@ export function TrajectoryView({
   }
 
   return (
-    <div className={css.root}>
+    <div className={css.root} data-conversation-composer-overlay="">
       <TrajectoryToolbar
         actualDuration={actualDuration}
         onActualDurationChange={(nextActualDuration) => {

+ 3 - 13
packages/client/ui-trajectory/src/client/views.module.css

@@ -13,19 +13,6 @@
   background: var(--dsw-alias-bg-layer-1);
 }
 
-/* Trajectory keeps the ledger and details panel inside the remaining
- * conversation height. Only the ledger pane scrolls; the composer remains
- * the fixed flex sibling below this view. */
-:global([data-conversation-scroll]):has(.root) {
-  overflow: hidden;
-}
-
-:global([data-conversation-scroll]):has(.root) > :first-child {
-  flex: 1 1 0;
-  min-height: 0;
-  overflow: hidden;
-}
-
 .ledger {
   position: relative;
   z-index: 0;
@@ -35,4 +22,7 @@
   min-height: 0;
   min-width: 0;
   overflow: hidden;
+
+  /* ConversationRoot publishes the floating composer's live height. */
+  --dsh-trajectory-bottom-clearance: calc(var(--dsh-composer-height, 152px) + 16px);
 }

+ 47 - 0
packages/client/ui-trajectory/tests/table.spec.tsx

@@ -160,6 +160,53 @@ describe('TrajectoryTable', () => {
     expect(onClearSelection).toHaveBeenCalledOnce()
   })
 
+  it('follows appended records only while the ledger is already at the bottom', () => {
+    const view = render(<TrajectoryTable turns={TURNS} {...FOLD_PROPS} />)
+    const tablePane = screen.getByRole('table').parentElement as HTMLElement
+    let scrollHeight = 200
+    Object.defineProperties(tablePane, {
+      clientHeight: { configurable: true, get: () => 100 },
+      scrollHeight: { configurable: true, get: () => scrollHeight },
+    })
+    tablePane.scrollTop = 100
+    fireEvent.scroll(tablePane)
+
+    scrollHeight = 260
+    view.rerender(
+      <TrajectoryTable
+        turns={[...TURNS, {
+          turn: 2,
+          groups: [{
+            title: 'Step 1',
+            cells: [{ index: 4, kind: 'message', text: 'new reply', timeSeconds: 0.1 }],
+          }],
+        }]}
+        {...FOLD_PROPS}
+      />,
+    )
+    expect(tablePane.scrollTop).toBe(260)
+
+    tablePane.scrollTop = 20
+    fireEvent.scroll(tablePane)
+    scrollHeight = 320
+    view.rerender(
+      <TrajectoryTable
+        turns={[...TURNS, {
+          turn: 2,
+          groups: [{
+            title: 'Step 1',
+            cells: [
+              { index: 4, kind: 'message', text: 'new reply', timeSeconds: 0.1 },
+              { index: 5, kind: 'tool', text: 'new tool', timeSeconds: 0.1 },
+            ],
+          }],
+        }]}
+        {...FOLD_PROPS}
+      />,
+    )
+    expect(tablePane.scrollTop).toBe(20)
+  })
+
   it('keeps running and failure semantics distinct from record roles', () => {
     const view = render(<TrajectoryTable turns={TURNS} {...FOLD_PROPS} />)
     expect(view.container.querySelector('tr[data-kind="tool"][data-running="true"]')).toBeTruthy()

+ 147 - 2
packages/client/ui-trajectory/tests/views.spec.tsx

@@ -9,7 +9,7 @@
  */
 import { Context } from 'cordis'
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
-import { cleanup, fireEvent, render, screen } from '@testing-library/react'
+import { act, cleanup, fireEvent, render, screen } from '@testing-library/react'
 import { createElement, type ComponentProps, type FC, type ReactNode } from 'react'
 import { bindSnapshotSelector } from '@deepseek-ai/dsh-client-web-react'
 import { resolveSlotLabel } from '@deepseek-ai/dsh-client-ui-slots'
@@ -288,6 +288,7 @@ describe('tab switching in ConversationRoot', () => {
     expect(screen.queryByRole('columnheader')).toBeNull()
     expect(screen.getByRole('toolbar', { name: 'Trajectory toolbar' })).toBeTruthy()
     expect(screen.getByRole('region', { name: 'Trajectory timeline' })).toBeTruthy()
+    expect(view.container.querySelector('[data-conversation-composer-overlay]')).toBeTruthy()
     fireEvent.click(screen.getByRole('button', { name: 'Collapse turns' }))
     expect(view.container.querySelector('[data-collapsed-summary="turn"]')).toBeTruthy()
     fireEvent.click(screen.getByRole('button', { name: 'Expand turns' }))
@@ -445,7 +446,7 @@ describe('tab switching in ConversationRoot', () => {
       .toBe('outside')
     fireEvent.contextMenu(plot)
     expect(screen.getByRole('row', { name: /USER/ }).getAttribute('data-timeline-focus'))
-      .toBeNull()
+      .toBe('outside')
   })
 
   it('clicking a timeline block clears the range, selects the record, and opens its inspector', async () => {
@@ -528,6 +529,57 @@ describe('timeline projection', () => {
     }],
   }] satisfies readonly TrajectoryTurnModel[]
 
+  it('splits assistant time into recorded TTFT and decoding proportions with a delayed tooltip', () => {
+    vi.useFakeTimers()
+    try {
+      const view = render(
+        <TrajectoryTimeline
+          turns={[{
+            turn: 1,
+            groups: [{
+              title: 'Step 1',
+              cells: [{
+                index: 1,
+                kind: 'message',
+                text: 'assistant',
+                startedAt: 1_000,
+                timeSeconds: 2,
+                assistantMetrics: {
+                  timingRecorded: true,
+                  stepStartTime: 1_000,
+                  firstTokenTime: 1_500,
+                  completedTime: 3_000,
+                  usageProvided: false,
+                  outputTokens: null,
+                },
+              }],
+            }],
+          }]}
+          mode="duration"
+          range={null}
+          onRangeChange={vi.fn()}
+        />,
+      )
+      const span = view.container.querySelector<HTMLElement>(
+        '[data-timeline-span="message"]',
+      )
+      expect(span?.getAttribute('title')).toBeNull()
+      expect(span?.getAttribute('data-assistant-timing')).toBe('true')
+      expect(span?.style.getPropertyValue('--trajectory-assistant-ttft')).toBe('25%')
+
+      fireEvent.mouseEnter(span as HTMLElement)
+      act(() => { vi.advanceTimersByTime(499) })
+      expect(view.container.querySelector('[role="tooltip"]')).toBeNull()
+      act(() => { vi.advanceTimersByTime(1) })
+      const tooltip = view.container.querySelector<HTMLElement>('[role="tooltip"]')
+      expect(tooltip?.textContent).toContain('Total 2.0 s')
+      expect(tooltip?.textContent).toContain('TTFT 500 ms')
+      expect(tooltip?.textContent).toContain('Decoding 1.5 s')
+    } finally {
+      vi.useRealTimers()
+    }
+  })
+
   it('cancels native scrolling across the timeline while zooming', () => {
     render(
       <TrajectoryTimeline
@@ -550,6 +602,99 @@ describe('timeline projection', () => {
     })).toBe(false)
   })
 
+  it('scales sequence gutters with narrow operation spans', () => {
+    const view = render(
+      <TrajectoryTimeline
+        turns={longTurns}
+        mode="sequence"
+        range={null}
+        onRangeChange={vi.fn()}
+      />,
+    )
+    const span = view.container.querySelector<HTMLElement>('[data-timeline-span]')
+    expect(span?.style.getPropertyValue('--trajectory-span-width')).toBe('10%')
+    expect(span?.style.getPropertyValue('--trajectory-span-gap'))
+      .toBe('clamp(0.25px, 0.8%, 1px)')
+  })
+
+  it('clears the selection without changing zoom on a zoomed right click', () => {
+    const onRangeChange = vi.fn()
+    const view = render(
+      <TrajectoryTimeline
+        turns={longTurns}
+        mode="sequence"
+        range={{ start: 2, end: 4 }}
+        onRangeChange={onRangeChange}
+      />,
+    )
+    const plot = screen.getByLabelText('Timeline overview; drag horizontally to focus events')
+    vi.spyOn(plot, 'getBoundingClientRect').mockReturnValue({
+      x: 0, y: 0, left: 0, top: 0, right: 100, bottom: 72, width: 100, height: 72,
+      toJSON: () => ({}),
+    })
+    fireEvent.wheel(plot, { clientX: 50, deltaY: -1_000 })
+    const domain = view.container.querySelector<HTMLElement>('[data-timeline-domain]')
+    const domainWidth = domain?.style.getPropertyValue('--trajectory-domain-width')
+    expect(domainWidth).not.toBe('100%')
+
+    fireEvent.pointerDown(plot, { button: 2, clientX: 50, pointerId: 1 })
+    expect(fireEvent.contextMenu(plot)).toBe(false)
+    fireEvent.pointerUp(plot, { button: 2, clientX: 50, pointerId: 1 })
+
+    expect(onRangeChange).toHaveBeenCalledOnce()
+    expect(onRangeChange).toHaveBeenCalledWith(null)
+    expect(domain?.style.getPropertyValue('--trajectory-domain-width')).toBe(domainWidth)
+  })
+
+  it('clears the selection and suppresses the context menu at full zoom', () => {
+    const onRangeChange = vi.fn()
+    render(
+      <TrajectoryTimeline
+        turns={longTurns}
+        mode="sequence"
+        range={{ start: 2, end: 4 }}
+        onRangeChange={onRangeChange}
+      />,
+    )
+    const plot = screen.getByLabelText('Timeline overview; drag horizontally to focus events')
+
+    fireEvent.pointerDown(plot, { button: 2, clientX: 50, pointerId: 1 })
+    expect(fireEvent.contextMenu(plot)).toBe(false)
+    fireEvent.pointerUp(plot, { button: 2, clientX: 50, pointerId: 1 })
+    expect(onRangeChange).toHaveBeenCalledOnce()
+    expect(onRangeChange).toHaveBeenCalledWith(null)
+  })
+
+  it('pans the zoomed viewport with a right-button drag without changing the selection', () => {
+    const onRangeChange = vi.fn()
+    const view = render(
+      <TrajectoryTimeline
+        turns={longTurns}
+        mode="sequence"
+        range={{ start: 2, end: 4 }}
+        onRangeChange={onRangeChange}
+      />,
+    )
+    const plot = screen.getByLabelText('Timeline overview; drag horizontally to focus events')
+    vi.spyOn(plot, 'getBoundingClientRect').mockReturnValue({
+      x: 0, y: 0, left: 0, top: 0, right: 100, bottom: 72, width: 100, height: 72,
+      toJSON: () => ({}),
+    })
+    fireEvent.wheel(plot, { clientX: 50, deltaY: -1_000 })
+    const domain = view.container.querySelector<HTMLElement>('[data-timeline-domain]')
+    const before = domain?.style.getPropertyValue('--trajectory-domain-left')
+
+    fireEvent.pointerDown(plot, { button: 2, clientX: 50, pointerId: 1 })
+    expect(plot.getAttribute('data-panning')).toBe('true')
+    expect(fireEvent.contextMenu(plot)).toBe(false)
+    fireEvent.pointerMove(plot, { buttons: 2, clientX: 75, pointerId: 1 })
+    fireEvent.pointerUp(plot, { button: 2, clientX: 75, pointerId: 1 })
+
+    expect(domain?.style.getPropertyValue('--trajectory-domain-left')).not.toBe(before)
+    expect(onRangeChange).not.toHaveBeenCalled()
+    expect(plot.getAttribute('data-panning')).toBeNull()
+  })
+
   it('pans the zoomed viewport only far enough to reveal a newly selected record', async () => {
     const onRangeChange = vi.fn()
     const view = render(

+ 2 - 2
packages/host/directory-picker-browse/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/host/directory-picker-browse/README.md
-README.md: 52b5fe7e89f915be3b50324628e9d5c48f1ef94c
-README.zh.md: 742da39470083887a71ddba4a7c8012f0ce0ea1f
+README.md: 62384cc0b0e5756e56c1d608252721c506a0915f
+README.zh.md: 8f495e1e4d87486d0565eadcbf7df694494c7096

Fichier diff supprimé car celui-ci est trop grand
+ 0 - 1
packages/host/directory-picker-browse/README.md


Fichier diff supprimé car celui-ci est trop grand
+ 0 - 1
packages/host/directory-picker-browse/README.zh.md


+ 51 - 8
packages/host/directory-picker-browse/src/client/DirectoryBrowser.module.css

@@ -49,11 +49,29 @@
   color: var(--dsw-alias-label-primary);
 }
 
+/* The bar IS the editor's box in both modes: it carries the rounded outline
+ * and the inner padding, the crumbs and the input sit inside it, and hovering
+ * the edit zone lights the whole row rather than the remainder right of the
+ * crumbs. The negative left margin pays back the border and padding, so the
+ * crumb (and input) text keeps the column the title sits in. */
 .crumbBar {
   display: flex;
   align-items: center;
   gap: 4px;
-  min-height: 20px;
+  box-sizing: border-box;
+  min-height: 24px;
+  margin-left: -9px;
+  padding: 0 8px;
+  border: 1px solid transparent;
+  border-radius: 8px;
+}
+
+/* Lit by the affordance the row belongs to, never by a crumb: a crumb's hover
+ * offers navigation, not path entry. Editing keeps the outline standing. */
+.crumbBar:has(.crumbEditZone:enabled:hover),
+.crumbBar:has(.crumbEditZone:focus-visible),
+.crumbBar:has(.pathInput) {
+  border-color: var(--dsw-alias-border-l2);
 }
 
 /* Deep chains scroll inside the trail (the effect pins the tail into view)
@@ -118,25 +136,50 @@
   color: var(--dsw-alias-label-tertiary);
 }
 
-/* The empty remainder of the bar: invisible, but a real click target that
- * flips the bar into path-edit mode. */
+/* The empty remainder of the bar: a real click target that flips the bar into
+ * path-edit mode. The pencil glyph seated at its right edge is the standing
+ * affordance; the outline the gesture lights belongs to the bar, so the whole
+ * row reads as the box the input will occupy. */
 .crumbEditZone {
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
   flex: 1 0 34px;
   min-width: 34px;
-  align-self: stretch;
+  height: 22px;
+  padding: 0;
   border: none;
   background: transparent;
   cursor: text;
+  outline: none;
+}
+
+.crumbEditGlyph {
+  flex: none;
+  color: var(--dsw-alias-label-tertiary);
 }
 
+.crumbEditZone:enabled:hover .crumbEditGlyph,
+.crumbEditZone:focus-visible .crumbEditGlyph {
+  color: var(--dsw-alias-label-primary);
+}
+
+.crumbEditZone:disabled {
+  cursor: default;
+}
+
+.crumbEditZone:disabled .crumbEditGlyph {
+  color: var(--dsw-alias-label-caption);
+}
+
+/* Chrome-free: the bar around it draws the box (border, radius, padding). */
 .pathInput {
   box-sizing: border-box;
   flex: 1 1 0;
   min-width: 0;
-  height: 24px;
-  padding: 0 8px;
-  border: 1px solid var(--dsw-alias-border-l2);
-  border-radius: 8px;
+  height: 22px;
+  padding: 0;
+  border: none;
   outline: none;
   background: transparent;
   font-size: 13px;

+ 257 - 50
packages/host/directory-picker-browse/src/client/DirectoryBrowser.tsx

@@ -18,15 +18,27 @@
  * owning flow decides what "Open" means and owns the workspace-creation
  * error surface. Hidden entries are host-flagged and hidden by default; the
  * footer's fixed-label "Show hidden files" toggle (aria-pressed, check when
- * on) reveals them (client-side only). The path editor opens seeded with a
- * trailing separator, and while the draft's directory part names a listed
- * level, its final segment prefix-filters that level's rows (a dot-led
- * prefix also reveals the hidden entries it names).
+ * on) reveals them (client-side only). The path editor announces itself with
+ * a pencil glyph and a bar-wide hover-lit outline, opens seeded with a
+ * trailing separator, and keeps the panes under the draft: the final segment
+ * prefix-filters the LAST pane while that pane's level is the one the draft's
+ * directory part names (a dot-led prefix also reveals the hidden entries it
+ * names, and a prefix nobody matches releases the filter), while any other
+ * directory part is scanned after a short debounce and lands like any other
+ * navigation — selection-anchored and two-pane away from the display root,
+ * both legs waited out so one keystroke moves the view once. The pane arity
+ * holds throughout: the last pane is the level the path names and the one
+ * beside it is its parent, so typing deeper descends and erasing segments
+ * walks back up, moving the Miller view without leaving the editor. Panes the
+ * draft walked to stay put when the editor closes (cancellation included):
+ * the crumbs name where the walk ended, and Open's fallback target follows
+ * them.
  */
 import { useCallback, useEffect, useRef, useState } from 'react'
 import clsx from 'clsx'
 import {
-  Button, IconCheckOutline16, IconChevronRightOutline14, IconFolderClose16, IconFolderOpen16, IconPlusOutline16, Modal,
+  Button, IconCheckOutline16, IconChevronRightOutline14, IconEditOutline16, IconFolderClose16, IconFolderOpen16,
+  IconPlusOutline16, Modal,
 } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { DirectoryEntry, DirectoryListing } from '@deepseek-ai/dsh-client-runtime/client'
 import { DirectoryBrowseError } from '@deepseek-ai/dsh-client-runtime/client'
@@ -75,6 +87,15 @@ const SLOW_SCAN_DELAY_MS = 300
  */
 const PARENT_LEG_WAIT_MS = 200
 
+/**
+ * How long a typed draft rests before the panes follow it to a directory no
+ * pane lists. The window absorbs the keystrokes that walk through
+ * intermediate directory parts (every character of `/usr/lo` past the
+ * separator would otherwise be its own scan) while staying short enough that
+ * a pause reads as "the list moved with me".
+ */
+const DRAFT_PREVIEW_DEBOUNCE_MS = 250
+
 /**
  * Breadcrumb rows for display: inside the home subtree the chain starts at a
  * localized Home crumb; outside it the full ancestry shows, the root labeled
@@ -100,21 +121,89 @@ function separatorOf(listing: DirectoryListing): '\\' | '/' {
   return listing.home.includes('\\') ? '\\' : '/'
 }
 
+/** The listed level as a directory part: its own path, separator-terminated (the root already is). */
+function levelDirectory(listing: DirectoryListing): string {
+  const sep = separatorOf(listing)
+  return listing.path.endsWith(sep) ? listing.path : `${listing.path}${sep}`
+}
+
+/** The directory text a draft-following scan last sent, with the level path the host answered it with. */
+interface ScannedDirectory {
+  /** The draft's directory part, verbatim as it went to the host. */
+  readonly directory: string
+  /** `path` of the listing that came back. */
+  readonly landed: string
+}
+
 /**
- * The path draft's final segment, when its directory part is exactly the
- * level `listing` lists — the segment the level prefix-filters on while the
- * user types. Any other draft (no separator yet, or naming some other
- * directory) leaves the level unfiltered. The directory part compares
- * exactly (it is the host's own path text, reached by seeding or erasing);
- * only the name filter downstream is case-insensitive.
+ * The draft's directory part — everything through its last separator — or
+ * null while no separator has been typed at all (nothing addresses a
+ * directory yet). The platform comes from `listing`: on Windows a forward
+ * slash separates too (the host's `resolve` accepts either), while on POSIX a
+ * backslash is a legal name character and never separates.
  */
-function draftPrefixFor(listing: DirectoryListing, draft: string | null): string | null {
-  if (draft === null) return null
-  const sep = separatorOf(listing)
-  const cut = draft.lastIndexOf(sep)
-  if (cut === -1) return null
-  const level = listing.path.endsWith(sep) ? listing.path : `${listing.path}${sep}`
-  return draft.slice(0, cut + 1) === level ? draft.slice(cut + 1) : null
+function draftDirectory(listing: DirectoryListing, draft: string): string | null {
+  const cut = separatorOf(listing) === '\\'
+    ? Math.max(draft.lastIndexOf('\\'), draft.lastIndexOf('/'))
+    : draft.lastIndexOf('/')
+  return cut === -1 ? null : draft.slice(0, cut + 1)
+}
+
+/**
+ * How the draft reads against one level: the directory part it names, and —
+ * when `listing` is the level that directory part addresses — the final
+ * segment that prefix-filters it while the user types (case-insensitively,
+ * downstream). A level answers a directory part when its own path is that
+ * part, or when it is the level that very text just produced (`scanned`): the
+ * host resolves what it is given, so `..` segments and Windows forward
+ * slashes reach a level whose path spells the request differently.
+ * @param listing - the level to read the draft against.
+ * @param draft - the current path draft.
+ * @param scanned - the last draft-following scan's directory and landing.
+ * @returns the draft's directory part (null with no separator typed) and its
+ * filtering tail (null when this level does not answer that directory).
+ */
+function readDraft(
+  listing: DirectoryListing,
+  draft: string,
+  scanned: ScannedDirectory | null,
+): { directory: string | null; tail: string | null } {
+  const directory = draftDirectory(listing, draft)
+  if (directory === null) return { directory: null, tail: null }
+  const answers = directory === levelDirectory(listing)
+    || (scanned !== null && scanned.directory === directory && scanned.landed === listing.path)
+  return { directory, tail: answers ? draft.slice(directory.length) : null }
+}
+
+/**
+ * The rows one column renders. The selection is exempt from every filter: it
+ * anchors the two-pane view (crumbs and the child pane point at it), so
+ * neither the hidden filter after a dot-reveal pick nor a prefix miss may
+ * orphan it. A prefix narrows the level only while some row it would actually
+ * show matches — a tail nobody matches is a name being spelled, not a demand
+ * for an empty pane, so the level shows whole and its hidden rows return to
+ * obeying the toggle. Counting only displayable rows is what keeps that true:
+ * were a hidden row ever to match a prefix that does not reveal it (today
+ * `hidden` means dot-prefixed, so it cannot), the level would narrow to
+ * nothing.
+ */
+function visibleEntries(
+  entries: readonly DirectoryEntry[],
+  selectedPath: string | null,
+  showHidden: boolean,
+  filterPrefix: string | null,
+): readonly DirectoryEntry[] {
+  const needle = filterPrefix === null ? '' : filterPrefix.toLowerCase()
+  // A dot-led prefix names hidden entries explicitly, so matching ones
+  // surface even while the toggle keeps the rest hidden.
+  const displayable = (entry: DirectoryEntry): boolean => showHidden || !entry.hidden || needle.startsWith('.')
+  const matches = (entry: DirectoryEntry): boolean => displayable(entry) && entry.name.toLowerCase().startsWith(needle)
+  const narrowing = needle !== '' && entries.some(matches)
+  return entries.filter((entry) => {
+    if (entry.path === selectedPath) return true
+    if (narrowing) return matches(entry)
+    return showHidden || !entry.hidden
+  })
 }
 
 /** One column of folder rows (the Miller view renders one or two of these). */
@@ -127,16 +216,7 @@ function LevelColumn({ entries, selectedPath, busy, onPick, showHidden, filterPr
   filterPrefix: string | null
   pathEditing: boolean
 }) {
-  const visible = entries.filter((entry) => {
-    // The selection is exempt from both filters: it anchors the two-pane
-    // view (crumbs and the child pane point at it), so neither the hidden
-    // filter after a dot-reveal pick nor a prefix miss may orphan it.
-    if (entry.path === selectedPath) return true
-    if (filterPrefix !== null && !entry.name.toLowerCase().startsWith(filterPrefix.toLowerCase())) return false
-    // A dot-led prefix names hidden entries explicitly, so matching ones
-    // surface even while the toggle keeps the rest hidden.
-    return showHidden || !entry.hidden || filterPrefix?.startsWith('.') === true
-  })
+  const visible = visibleEntries(entries, selectedPath, showHidden, filterPrefix)
   return (
     <div className={css.column} role="list">
       {visible.map((entry) => {
@@ -264,27 +344,83 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
   }, [restartSlowScanWindow, listDirectory])
 
   /**
-   * Replace the whole view with a freshly navigated level. Away from the
+   * Enter owns the view from submission until its navigation lands, so the
+   * debounce timer the same keystrokes armed must not supersede it. Cleared
+   * by the next edit (and by opening the editor); a failed submission leaves
+   * it set until the operator edits again, so the rejected path is not
+   * immediately re-scanned as a preview.
+   */
+  const previewSuspended = useRef(false)
+
+  // The panes as the draft-following scan must read them when its wait
+  // fires: current, but NOT a dependency of the wait (see the effect below).
+  const viewRef = useRef<{ parent: DirectoryListing | null; child: DirectoryListing | null }>({ parent: null, child: null })
+  useEffect(() => { viewRef.current = { parent, child } }, [parent, child])
+
+  // What the last draft-following scan asked for and what came back, so a
+  // level still answers the text that produced it after the host respelled
+  // it. Stale entries are harmless: a match needs both the directory text and
+  // that level's own path, which together already mean the same directory.
+  const scanned = useRef<ScannedDirectory | null>(null)
+
+  /**
+   * A landed preview replaced the pane a keyboard operator may have Tabbed
+   * onto, so the focus it drops is re-parked on the still-open editor (the
+   * Modal has no focus trap). Consumed by the refocus effect below.
+   */
+  const refocusPathInput = useRef(false)
+
+  /**
+   * Replace the whole view with a freshly scanned level. Away from the
    * display root — the same collapse the crumb header renders, so crumbs and
    * pane shape never disagree — the landing is two-pane: the target's ACTUAL
    * parent-level entry re-selected (left pane = parent, right pane = the
    * target), so a crumb jump reads as stepping back one pane. Both legs land
    * as one frame when the parent leg settles within
    * {@link PARENT_LEG_WAIT_MS}; past that bound (or at the display root) the
-   * target commits alone — single wide level, the editor closes, loading
-   * ends — and a late parent leg still upgrades the landing in place. A
-   * failed parent leg, or a truncated parent window that lacks the target,
-   * leaves the single-pane landing — the upgrade must never orphan the
-   * selection it exists to anchor. Until whichever commit comes first, the
-   * previous view keeps rendering: navigation swaps the panes, it never
-   * blanks them.
+   * target commits alone — single wide level, loading ends — and a late
+   * parent leg still upgrades the landing in place. A failed parent leg, or a
+   * truncated parent window that lacks the target, leaves the single-pane
+   * landing — the upgrade must never orphan the selection it exists to
+   * anchor. Until whichever commit comes first, the previous view keeps
+   * rendering: a landing swaps the panes, it never blanks them.
+   *
+   * Two callers, one landing shape. A submitted path (Enter, a crumb) closes
+   * the editor on arrival, announces its failure, and takes the wait bound —
+   * it is answering a gesture, so it may not hang on a stalled parent. The
+   * editor's own draft-following scan keeps all three to itself: it is
+   * speculative, nothing waits on it, and the stale view keeps rendering, so
+   * it waits for BOTH legs rather than flashing a single pane it would then
+   * upgrade — one keystroke must move the view once. A failure leaves the
+   * last readable panes standing and says nothing, while an arrival clears
+   * the stale message and re-parks focus the swap dropped.
+   * @param path - the level to list; absent lists the Host home directory.
+   * @param options - `closeEditor` retires the path draft on arrival and
+   * bounds the wait for the parent leg; `announce` surfaces a failure as the
+   * dialog's alert.
    */
-  const navigate = useCallback((path?: string) => {
+  const land = useCallback((path: string | undefined, options: { closeEditor: boolean; announce: boolean }) => {
     const { seq, scan } = launchListing(path)
     setLoading(true)
-    setError(null)
+    if (options.announce) setError(null)
+    // What every landing does once its panes are committed, whichever shape
+    // committed them.
+    const settle = (): void => {
+      setLoading(false)
+      if (options.closeEditor) {
+        setPathDraft(null)
+        return
+      }
+      setError(null)
+      refocusPathInput.current = true
+    }
     scan.then((target) => {
       if (seq !== requestSeq.current) return
+      // The level the panes will present as current answers this exact
+      // directory text, however the host respelled it (`..`, a Windows
+      // forward slash): the tail filters, and the same text asks for no
+      // second scan.
+      if (!options.closeEditor && path !== undefined) scanned.current = { directory: path, landed: target.path }
       // The single-pane landing; `landed` makes it first-commit-only, while
       // the two-pane commit below may still upgrade an already-landed view.
       let landed = false
@@ -294,8 +430,7 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
         setParent(target)
         setSelected(null)
         setChild(null)
-        setLoading(false)
-        setPathDraft(null)
+        settle()
       }
       // Arity is label-independent: only the collapsed chain's depth decides.
       if (displayCrumbs(target, '').length < 2) { landSingle(); return }
@@ -316,23 +451,29 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
         setChild(target)
         // Idempotent on a late upgrade of a timed-out landing: reopening the
         // editor or starting a newer scan supersedes this seq, so reaching
-        // here means the draft is closed and the loading flag is this
-        // navigation's own.
-        setLoading(false)
-        setPathDraft(null)
+        // here means the settlement is still this landing's own.
+        settle()
       }, () => {
         // The parent-leg failure (its abort included) never surfaces: the
         // target listed fine, and nobody asked to see the parent level.
         landSingle()
       })
-      window.setTimeout(landSingle, PARENT_LEG_WAIT_MS)
+      // Only a submitted navigation is bounded: the walk waits both legs out
+      // (see the contract above), and a keystroke aborts it if the operator
+      // moves on first.
+      if (options.closeEditor) window.setTimeout(landSingle, PARENT_LEG_WAIT_MS)
     }, (reason: unknown) => {
       if (seq !== requestSeq.current) return
       setLoading(false)
-      setError(failureText(reason))
+      if (options.announce) setError(failureText(reason))
     })
   }, [launchListing, continueScan])
 
+  /** Commit a submitted path (Enter, a crumb, the initial home listing): the editor closes, failures surface. */
+  const navigate = useCallback((path?: string) => {
+    land(path, { closeEditor: true, announce: true })
+  }, [land])
+
   // Editor-close focus parking (consumed by the refocus effect below the
   // miller-row ref): a pick parks on the selection's row, Enter and an
   // input-focused Escape park on the crumb edit zone that replaces the
@@ -381,6 +522,17 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
     })
   }, [launchListing, pathDraft])
 
+  /**
+   * Walk the panes to the directory the draft addresses, WITHOUT closing the
+   * editor. The landing is an ordinary one — selection-anchored and two-pane
+   * away from the display root — so typing a path moves the Miller view
+   * exactly as a crumb jump does, and the draft's final segment
+   * prefix-filters the arrival from the next render on.
+   */
+  const previewDraftLevel = useCallback((directory: string) => {
+    land(directory, { closeEditor: false, announce: false })
+  }, [land])
+
   /** Abandon path editing (Escape or clicking away) and restore the crumb view. */
   const cancelPathEdit = useCallback(() => {
     // Cancel also withdraws a navigation the editor already launched: its
@@ -499,8 +651,40 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
     return () => { window.clearTimeout(timer) }
   }, [loading, scanWindow])
 
+  // The panes follow the draft: EVERY keystroke replaces the pending timer,
+  // and the target is decided when it fires, off the panes as they stand
+  // then. Keying the wait on the draft (not on the directory part it names)
+  // is what makes a keystroke that superseded an in-flight scan re-arm one,
+  // and what lets an edit after a rejected submission release the hold the
+  // submission took. The panes are read through a ref for the converse
+  // reason: were they dependencies, the landing this commits would re-arm the
+  // wait, and a host answering with a differently spelled path would scan
+  // forever.
+  useEffect(() => {
+    if (pathDraft === null) return
+    const timer = window.setTimeout(() => {
+      if (previewSuspended.current) return
+      // The level the panes present as current: it alone may answer the
+      // draft, so anything else it names is a level to walk to.
+      const current = viewRef.current.child ?? viewRef.current.parent
+      if (current === null) return
+      const { directory, tail } = readDraft(current, pathDraft, scanned.current)
+      if (directory === null || tail !== null) return
+      previewDraftLevel(directory)
+    }, DRAFT_PREVIEW_DEBOUNCE_MS)
+    return () => { window.clearTimeout(timer) }
+  }, [pathDraft, previewDraftLevel])
+
   // After the hooks: a closed dialog renders nothing and evaluates no copy.
   const crumbSource = child ?? parent
+  // The draft's tail filters the level it names, which by the pane invariant
+  // is the LAST pane — never a pane the draft has already walked away from.
+  // Narrowing that stale pane would move the view twice for one keystroke:
+  // once as it narrows, again as its landing replaces it. It holds still
+  // instead, and the filter arrives with the level it belongs to.
+  const typedPrefix = crumbSource === null || pathDraft === null
+    ? null
+    : readDraft(crumbSource, pathDraft, scanned.current).tail
   const crumbs = crumbSource === null ? [] : displayCrumbs(crumbSource, t('browser.home'))
   const crumbTail = crumbs.at(-1)?.path
   useEffect(() => {
@@ -523,6 +707,12 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
   // replacing the picked button's column — while Enter and an input-focused
   // Escape land on the crumb edit zone that replaces the input.
   useEffect(() => {
+    if (refocusPathInput.current) {
+      refocusPathInput.current = false
+      // Only when the swap actually dropped focus to body: focus the operator
+      // still holds (the input itself, a surviving row) stays theirs.
+      if (document.activeElement === document.body) pathInputRef.current?.focus()
+    }
     if (pathDraft !== null) return
     if (refocusPick.current) {
       refocusPick.current = false
@@ -637,11 +827,17 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
                       </span>
                     ))}
                   </span>
-                  {/* The empty zone right of the crumbs is the path-edit affordance. */}
+                  {/* The empty zone right of the crumbs is the path-edit
+                    * affordance: the whole remainder of the bar clicks into
+                    * the editor, and the pencil glyph parked at its right
+                    * edge (with the same tooltip) is what says so — an
+                    * invisible target the operator must guess at is the one
+                    * way into typing a path. */}
                   <button
                     type="button"
                     className={css.crumbEditZone}
                     aria-label={t('browser.editPath')}
+                    title={t('browser.editPath')}
                     // Stays available with no listed level: when the home
                     // listing itself fails, typing an absolute path is the one
                     // remaining way forward.
@@ -653,6 +849,7 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
                     // otherwise close the editor via navigate's draft reset.
                       supersede()
                       setLoading(false)
+                      previewSuspended.current = false
                       // Seed with a trailing separator so typing immediately
                       // continues into child names (and prefix-filters below).
                       // No listed level means nothing to seed from (the editor
@@ -665,7 +862,9 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
                       const sep = separatorOf(parent)
                       setPathDraft(base.endsWith(sep) ? base : `${base}${sep}`)
                     }}
-                  />
+                  >
+                    <IconEditOutline16 size={14} className={css.crumbEditGlyph} />
+                  </button>
                 </>
               )
               : (
@@ -682,6 +881,9 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
                   // repopulate the view with the older path.
                     supersede()
                     setLoading(false)
+                    // A fresh edit releases the submission hold: the panes
+                    // may follow the new text wherever it points.
+                    previewSuspended.current = false
                     setPathDraft(event.target.value)
                   }}
                   {...compositionGuard}
@@ -699,6 +901,11 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
                         // focus on the returning crumb edit zone (a failure
                         // keeps the editor, so the flag waits until close).
                         refocusEditZone.current = true
+                        // The submitted path owns the view now: a debounce
+                        // timer still pending from these keystrokes would
+                        // otherwise supersede this navigation and land the
+                        // draft's parent directory instead.
+                        previewSuspended.current = true
                         navigate(pathDraft)
                       }
                     }
@@ -716,7 +923,7 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
                 busy={parentInert}
                 onPick={select}
                 showHidden={showHidden}
-                filterPrefix={draftPrefixFor(parent, pathDraft)}
+                filterPrefix={child === null ? typedPrefix : null}
                 pathEditing={draftPending}
               />
             )}
@@ -728,7 +935,7 @@ export function DirectoryBrowser({ open, listDirectory, createDirectory, onOpen,
                 busy={parentInert}
                 onPick={advance}
                 showHidden={showHidden}
-                filterPrefix={draftPrefixFor(child, pathDraft)}
+                filterPrefix={typedPrefix}
                 pathEditing={draftPending}
               />
             )}

+ 334 - 13
packages/host/directory-picker-browse/tests/directory-browser.spec.tsx

@@ -11,9 +11,14 @@ const HOME = '/home/u'
 const DOCS = `${HOME}/Documents`
 const HARNESS = `${DOCS}/harness`
 
-/** Listing fake over a tiny fixed tree; unknown paths reject like the Host. */
+/**
+ * Listing fake over a tiny fixed tree; unknown paths reject like the Host.
+ * A trailing separator is dropped the way the Host's own `resolve` drops it,
+ * so a directory part typed into the path editor addresses its level.
+ */
 function listingFor(path?: string): DirectoryListing {
-  const target = path ?? HOME
+  const asked = path ?? HOME
+  const target = asked.length > 1 && asked.endsWith('/') ? asked.slice(0, -1) : asked
   const tree: Record<string, DirectoryListing> = {
     [HOME]: {
       path: HOME,
@@ -647,7 +652,7 @@ describe('DirectoryBrowser', () => {
   })
 
   it('prefix-filters the listed level from the draft tail, dot revealing hidden matches', async () => {
-    mount()
+    const b = mount()
     await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
     fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
     const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
@@ -659,16 +664,29 @@ describe('DirectoryBrowser', () => {
     // A dot-led prefix names hidden entries, so it reveals the match.
     fireEvent.change(input, { target: { value: `${HOME}/.co` } })
     expect(screen.getByRole('listitem').textContent).toBe('.config')
-    // A prefix matching nothing empties the level (no stale rows linger).
+    // A prefix nobody matches releases the filter: the level shows whole
+    // (hidden rows back under the toggle) instead of emptying under a name
+    // the operator is still spelling.
     fireEvent.change(input, { target: { value: `${HOME}/zzz` } })
-    expect(screen.queryByRole('listitem')).toBeNull()
-    // A draft naming some other directory (or none) leaves the level whole.
+    expect(screen.getAllByRole('listitem').map(item => item.textContent)).toEqual(['Documents'])
+    // Its dot-led reveal lapses with it.
+    fireEvent.change(input, { target: { value: `${HOME}/.zzz` } })
+    expect(screen.getAllByRole('listitem').map(item => item.textContent)).toEqual(['Documents'])
+    // A tail inside the listed level names no level to walk to: the wait
+    // fires and finds nothing to scan.
+    const settled = b.listDirectory.mock.calls.length
+    await act(async () => { await new Promise((resolve) => { setTimeout(resolve, 400) }) })
+    expect(b.listDirectory.mock.calls).toHaveLength(settled)
+    // A draft naming some other directory (or none) leaves the level whole —
+    // and a draft with no separator at all addresses no directory either.
     fireEvent.change(input, { target: { value: 'no-separator' } })
     expect(screen.getByRole('listitem').textContent).toBe('Documents')
+    await act(async () => { await new Promise((resolve) => { setTimeout(resolve, 400) }) })
+    expect(b.listDirectory.mock.calls).toHaveLength(settled)
   })
 
   it('filters the child pane in two-pane mode and follows the draft back up a level', async () => {
-    mount()
+    const b = mount()
     await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
     fireEvent.click(rowButton(screen.getByRole('listitem')))
     await waitFor(() => { expect(columns()).toHaveLength(2) })
@@ -679,17 +697,303 @@ describe('DirectoryBrowser', () => {
     expect(input.value).toBe(`${DOCS}/`)
     fireEvent.change(input, { target: { value: `${DOCS}/h` } })
     expect(within(columns()[1]!).getByText('harness')).toBeTruthy()
+    // The child pane already lists that directory: no scan follows, and both
+    // panes stay.
+    const settled = b.listDirectory.mock.calls.length
+    await act(async () => { await new Promise((resolve) => { setTimeout(resolve, 400) }) })
+    expect(b.listDirectory.mock.calls).toHaveLength(settled)
+    expect(columns()).toHaveLength(2)
+    // A miss releases the right pane's filter rather than emptying it.
     fireEvent.change(input, { target: { value: `${DOCS}/zzz` } })
-    expect(within(columns()[1]!).queryAllByRole('listitem')).toHaveLength(0)
+    expect(within(columns()[1]!).getByText('harness')).toBeTruthy()
     expect(within(columns()[0]!).getByText('Documents')).toBeTruthy()
-    // Erasing back into the parent's own path moves the filter to the LEFT
-    // pane and releases the right one. The selected row is exempt (it
-    // anchors the two-pane view), so it alone survives the miss.
+    // Erasing back into the parent's own path re-lands on it rather than
+    // filtering the LEFT pane: the level being typed is always the last pane,
+    // never a pane with a deeper level standing to its right. Home is the
+    // display root, so it lands alone.
     fireEvent.change(input, { target: { value: `${HOME}/zz` } })
-    expect(within(columns()[0]!).getAllByRole('listitem').map(item => item.textContent)).toEqual(['Documents'])
+    await waitFor(() => { expect(columns()).toHaveLength(1) })
+    expect(screen.getAllByRole('listitem').map(item => item.textContent)).toEqual(['Documents'])
+  })
+
+  it('follows the draft into a directory no pane lists, landing the two-pane Miller view', async () => {
+    const b = mount()
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    expect(columns()).toHaveLength(1)
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    // Typing past a separator addresses a level nobody shows: the panes walk
+    // to it once the typing rests, landing the ordinary selection-anchored
+    // two-pane view (level | its children) with the tail filtering the right
+    // pane — a typed path moves the Miller view exactly as a crumb jump does.
+    fireEvent.change(input, { target: { value: `${DOCS}/h` } })
+    await waitFor(() => { expect(columns()).toHaveLength(2) })
+    expect(b.listDirectory).toHaveBeenCalledWith(`${DOCS}/`, expect.anything())
+    expect(within(columns()[0]!).getByText('Documents')).toBeTruthy()
+    expect(within(columns()[1]!).getByText('harness')).toBeTruthy()
+    // Still editing: the panes moved under the draft, the editor stayed.
+    expect(screen.getByLabelText<HTMLInputElement>('browser.editPath').value).toBe(`${DOCS}/h`)
+    // Typing on inside a level the panes already list costs no scan at all:
+    // the prefix filter alone answers the draft, both panes stay.
+    const settled = b.listDirectory.mock.calls.length
+    fireEvent.change(input, { target: { value: `${DOCS}/ha` } })
+    await act(async () => { await new Promise((resolve) => { setTimeout(resolve, 400) }) })
+    expect(b.listDirectory.mock.calls).toHaveLength(settled)
+    expect(columns()).toHaveLength(2)
+  })
+
+  it('keeps the typed level in the last pane, its parent beside it, as the draft walks', async () => {
+    const b = mount()
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    // Two levels down: the typed level on the right, its parent on the left.
+    fireEvent.change(input, { target: { value: `${HARNESS}/` } })
+    await waitFor(() => { expect(within(columns()[0]!).getByText('harness')).toBeTruthy() })
+    expect(columns()).toHaveLength(2)
+    expect(within(columns()[1]!).queryAllByRole('listitem')).toHaveLength(0)
+    // Erasing back to the parent's own path re-lands on it: the level being
+    // typed moves BACK into the last pane instead of staying on the left with
+    // its own child pane still to the right.
+    fireEvent.change(input, { target: { value: `${DOCS}/ha` } })
+    await waitFor(() => { expect(within(columns()[0]!).getByText('Documents')).toBeTruthy() })
+    expect(columns()).toHaveLength(2)
+    expect(within(columns()[1]!).getAllByRole('listitem').map(item => item.textContent)).toEqual(['harness'])
+    expect(b.listDirectory).toHaveBeenCalledWith(`${DOCS}/`, expect.anything())
+  })
+
+  it('holds a stale pane still until its landing, instead of narrowing it first', async () => {
+    // Own three-level tree: the level that goes stale needs two rows for the
+    // narrowing this pins against to be visible at all.
+    const ROOT = '/u'
+    const MID = `${ROOT}/mid`
+    const LEAF = `${MID}/leaf`
+    const chain = [{ name: '/', path: '/', hidden: false }, { name: 'u', path: ROOT, hidden: false }]
+    const tree: Record<string, DirectoryListing> = {
+      [ROOT]: {
+        path: ROOT,
+        home: ROOT,
+        crumbs: chain,
+        entries: [{ name: 'mid', path: MID, hidden: false }, { name: 'other', path: `${ROOT}/other`, hidden: false }],
+        truncated: false,
+      },
+      [MID]: {
+        path: MID,
+        home: ROOT,
+        crumbs: [...chain, { name: 'mid', path: MID, hidden: false }],
+        entries: [{ name: 'leaf', path: LEAF, hidden: false }, { name: 'sibling', path: `${MID}/sibling`, hidden: false }],
+        truncated: false,
+      },
+      [LEAF]: {
+        path: LEAF,
+        home: ROOT,
+        crumbs: [...chain, { name: 'mid', path: MID, hidden: false }, { name: 'leaf', path: LEAF, hidden: false }],
+        entries: [],
+        truncated: false,
+      },
+    }
+    mount({
+      listDirectory: vi.fn(async (path?: string) => {
+        const asked = path ?? ROOT
+        const found = tree[asked.length > 1 && asked.endsWith('/') ? asked.slice(0, -1) : asked]
+        if (found === undefined) throw new Error(`cannot list ${asked}`)
+        return found
+      }),
+    })
+    await waitFor(() => { expect(screen.getByText('mid')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    fireEvent.change(input, { target: { value: `${LEAF}/` } })
+    await waitFor(() => { expect(columns()).toHaveLength(2) })
+    expect(within(columns()[0]!).getAllByRole('listitem').map(item => item.textContent)).toEqual(['leaf', 'sibling'])
+    // Deleting the separator names the level the LEFT pane lists. That pane
+    // is stale — its landing will move it right — so it must not narrow to
+    // the tail first: one deletion, one movement.
+    fireEvent.change(input, { target: { value: LEAF } })
+    expect(within(columns()[0]!).getAllByRole('listitem').map(item => item.textContent)).toEqual(['leaf', 'sibling'])
+    await waitFor(() => { expect(within(columns()[0]!).getByText('other')).toBeTruthy() })
+    expect(within(columns()[1]!).getAllByRole('listitem').map(item => item.textContent)).toEqual(['leaf'])
+  })
+
+  it('keeps the walked-to panes when the editor is cancelled, Open adopting where the walk ended', async () => {
+    const b = mount()
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    fireEvent.change(input, { target: { value: `${DOCS}/h` } })
+    await waitFor(() => { expect(columns()).toHaveLength(2) })
+    fireEvent.keyDown(input, { key: 'Escape' })
+    // Cancel closes the editor; it does not rewind the walk. The operator
+    // watched the panes move, so the crumbs, the panes, and Open's target all
+    // stay where the walk ended.
+    expect(screen.queryByLabelText('browser.editPath', { selector: 'input' })).toBeNull()
+    expect(columns()).toHaveLength(2)
+    expect(within(columns()[0]!).getByText('Documents')).toBeTruthy()
+    expect(within(columns()[1]!).getByText('harness')).toBeTruthy()
+    expect(screen.getByRole('navigation').textContent).toContain('Documents')
+    const open = screen.getByRole<HTMLButtonElement>('button', { name: 'browser.open' })
+    expect(open.disabled).toBe(false)
+    fireEvent.click(open)
+    expect(b.onOpen).toHaveBeenCalledWith(DOCS)
+  })
+
+  it('waits both legs out for a walk: one keystroke never flashes a single pane', async () => {
+    let landParent = (): void => {}
+    const listDirectory = vi.fn(async (path?: string) => {
+      // The parent leg outlives the submitted-navigation wait bound; a walk
+      // has nothing waiting on it, so it holds the stale view instead of
+      // landing single-pane and upgrading.
+      if (path === HOME) return await new Promise<DirectoryListing>((resolve) => { landParent = () => { resolve(listingFor(HOME)) } })
+      return listingFor(path)
+    })
+    mount({ listDirectory })
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    fireEvent.change(input, { target: { value: `${DOCS}/h` } })
+    await waitFor(() => { expect(listDirectory).toHaveBeenCalledWith(HOME, expect.anything()) })
+    await act(async () => { await new Promise((resolve) => { setTimeout(resolve, 400) }) })
+    // Well past the submitted-navigation bound: still the pre-walk view.
+    expect(columns()).toHaveLength(1)
+    expect(screen.getByText('Documents')).toBeTruthy()
+    await act(async () => { landParent() })
+    await waitFor(() => { expect(columns()).toHaveLength(2) })
     expect(within(columns()[1]!).getByText('harness')).toBeTruthy()
   })
 
+  it('walks the panes back up when erased segments leave the listed levels', async () => {
+    const b = mount()
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    fireEvent.change(input, { target: { value: `${DOCS}/h` } })
+    await waitFor(() => { expect(columns()).toHaveLength(2) })
+    // Erasing back to a directory neither pane lists walks up to it; the
+    // filesystem root is the display root, so it lands the single wide level
+    // with the tail filtering it.
+    fireEvent.change(input, { target: { value: '/ho' } })
+    await waitFor(() => { expect(columns()).toHaveLength(1) })
+    expect(b.listDirectory).toHaveBeenCalledWith('/', expect.anything())
+    expect(screen.getAllByRole('listitem').map(item => item.textContent)).toEqual(['home'])
+  })
+
+  it('re-arms the draft-following scan after a keystroke superseded one in flight', async () => {
+    let started = 0
+    const listDirectory = vi.fn(async (path?: string) => {
+      if (path !== `${DOCS}/`) return listingFor(path)
+      started += 1
+      // The first scan never settles: the next keystroke aborts it, and only
+      // a re-armed wait can still land the level the draft names.
+      if (started === 1) return await new Promise<DirectoryListing>(() => {})
+      return listingFor(path)
+    })
+    mount({ listDirectory })
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    fireEvent.change(input, { target: { value: `${DOCS}/h` } })
+    await waitFor(() => { expect(started).toBe(1) })
+    // A further tail keystroke supersedes the in-flight scan; the panes must
+    // still follow, not sit on the stale level until a separator is typed.
+    fireEvent.change(input, { target: { value: `${DOCS}/ha` } })
+    await waitFor(() => { expect(screen.getByText('harness')).toBeTruthy() })
+  })
+
+  it('follows the draft again after an edit releases a failed submission hold', async () => {
+    const listDirectory = vi.fn(async (path?: string) => {
+      if (path === HARNESS) throw new Error('target unreadable')
+      return listingFor(path)
+    })
+    mount({ listDirectory })
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    // Submitting inside the debounce window holds the pending scan back.
+    fireEvent.change(input, { target: { value: HARNESS } })
+    fireEvent.keyDown(input, { key: 'Enter' })
+    await waitFor(() => { expect(screen.getByRole('alert').textContent).toBe('target unreadable') })
+    // Correcting only the final segment leaves the directory part unchanged;
+    // the edit must still release the hold and re-arm the wait.
+    fireEvent.change(input, { target: { value: `${HARNESS}x` } })
+    await waitFor(() => { expect(listDirectory).toHaveBeenCalledWith(`${DOCS}/`, expect.anything()) })
+    await waitFor(() => { expect(screen.getByText('harness')).toBeTruthy() })
+  })
+
+  it('re-parks focus on the editor when a landed scan unmounts the focused row', async () => {
+    mount()
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    // Two levels down, so the walk replaces the LEFT pane the focused row
+    // lives in (a landing that re-lists the same level reuses its rows).
+    fireEvent.change(input, { target: { value: `${HARNESS}/` } })
+    // The keyboard path: focus Tabbed onto a row of the level about to be
+    // replaced. Without a re-park it would fall to body, outside a Modal that
+    // has no focus trap.
+    rowButton(screen.getByRole('listitem')).focus()
+    await waitFor(() => { expect(within(columns()[0]!).getByText('harness')).toBeTruthy() })
+    expect(document.activeElement).toBe(screen.getByLabelText('browser.editPath'))
+  })
+
+  it('keeps the panes and stays silent when a draft-following scan fails', async () => {
+    const b = mount()
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    fireEvent.change(input, { target: { value: `${HOME}/nope/x` } })
+    await waitFor(() => { expect(b.listDirectory).toHaveBeenCalledWith(`${HOME}/nope/`, expect.anything()) })
+    // A half-typed directory is unreadable most of the time: the last
+    // readable level keeps rendering and no error interrupts the typing.
+    expect(screen.getByText('Documents')).toBeTruthy()
+    expect(screen.queryByRole('alert')).toBeNull()
+  })
+
+  it('holds the draft-following scan while a submitted path is in flight', async () => {
+    const listDirectory = vi.fn(async (path?: string) => {
+      // The submitted leg never settles, so the debounce window elapses with
+      // the navigation still owning the view.
+      if (path === HARNESS) return await new Promise<DirectoryListing>(() => {})
+      return listingFor(path)
+    })
+    mount({ listDirectory })
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    fireEvent.change(input, { target: { value: HARNESS } })
+    fireEvent.keyDown(input, { key: 'Enter' })
+    await act(async () => { await new Promise((resolve) => { setTimeout(resolve, 400) }) })
+    // Only the initial home listing and the submitted path — the draft's
+    // directory part was never scanned behind the navigation's back.
+    expect(listDirectory.mock.calls.map(call => call[0])).toEqual([undefined, HARNESS])
+  })
+
+  it('discards draft-following scans that a newer edit superseded', async () => {
+    let landDocs = (): void => {}
+    let failRoot = (): void => {}
+    const listDirectory = vi.fn(async (path?: string) => {
+      if (path === `${DOCS}/`) return await new Promise<DirectoryListing>((resolve) => { landDocs = () => { resolve(listingFor(DOCS)) } })
+      if (path === '/') {
+        return await new Promise<DirectoryListing>((_, reject) => {
+          failRoot = () => { reject(new Error('root unreadable')) }
+        })
+      }
+      return listingFor(path)
+    })
+    mount({ listDirectory })
+    await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
+    fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
+    const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
+    fireEvent.change(input, { target: { value: `${DOCS}/h` } })
+    await waitFor(() => { expect(listDirectory).toHaveBeenCalledWith(`${DOCS}/`, expect.anything()) })
+    fireEvent.change(input, { target: { value: '/x' } })
+    await waitFor(() => { expect(listDirectory).toHaveBeenCalledWith('/', expect.anything()) })
+    // Back onto the listed level: neither pending scan may still land.
+    fireEvent.change(input, { target: { value: `${HOME}/D` } })
+    await act(async () => { landDocs(); failRoot() })
+    expect(screen.getAllByRole('listitem').map(item => item.textContent)).toEqual(['Documents'])
+    expect(screen.queryByRole('alert')).toBeNull()
+  })
+
   it('keeps the draft and filter through window focus loss and in-dialog focus moves', async () => {
     mount()
     await waitFor(() => { expect(screen.getByRole('listitem')).toBeTruthy() })
@@ -813,7 +1117,8 @@ describe('DirectoryBrowser', () => {
       ],
       truncated: false,
     }
-    mount({ listDirectory: vi.fn(async () => windowsListing) })
+    const listDirectory = vi.fn(async () => windowsListing)
+    mount({ listDirectory })
     await waitFor(() => { expect(screen.getAllByRole('listitem')).toHaveLength(2) })
     fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
     const input = screen.getByLabelText<HTMLInputElement>('browser.editPath')
@@ -821,6 +1126,18 @@ describe('DirectoryBrowser', () => {
     expect(input.value).toBe(ROOT)
     fireEvent.change(input, { target: { value: `${ROOT}u` } })
     expect(screen.getByRole('listitem').textContent).toBe('Users')
+    // Windows separates on a forward slash too (so does the Host's resolve),
+    // so a path typed that way names its directory; the level the Host
+    // answers with spells it back with a backslash, and once that scan lands
+    // the level answers the typed spelling — the tail filters it.
+    fireEvent.change(input, { target: { value: 'C:/p' } })
+    await waitFor(() => { expect(screen.getByRole('listitem').textContent).toBe('Program Files') })
+    // And the same spelling asks for no second scan.
+    const settled = listDirectory.mock.calls.length
+    fireEvent.change(input, { target: { value: 'C:/pr' } })
+    await act(async () => { await new Promise((resolve) => { setTimeout(resolve, 400) }) })
+    expect(listDirectory.mock.calls).toHaveLength(settled)
+    expect(screen.getByRole('listitem').textContent).toBe('Program Files')
   })
 
   it('clicking away from the path editor cancels it back to the crumb view', async () => {
@@ -977,6 +1294,10 @@ describe('DirectoryBrowser', () => {
     fireEvent.click(screen.getByRole('button', { name: 'browser.editPath' }))
     const input = screen.getByLabelText('browser.editPath')
     fireEvent.change(input, { target: { value: DOCS } })
+    // With no level listed there is no platform separator to read, so the
+    // draft-following wait resolves to nothing and the editor types blind.
+    await act(async () => { await new Promise((resolve) => { setTimeout(resolve, 400) }) })
+    expect(listDirectory).toHaveBeenCalledTimes(1)
     listDirectory.mockImplementation(async (path?: string) => listingFor(path))
     fireEvent.keyDown(input, { key: 'Enter' })
     await waitFor(() => { expect(screen.getByText('harness')).toBeTruthy() })

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