[SCcagg5]

Part of a stack of 31 pull requests that depend on each other. They must be reviewed and merged in order: each PR builds on the previous one and its diff only contains its own changes.

• Previous: PR 17
• Next: PR 19

All PRs of the stack

#	PR
1	specs: Add spec 083 and the samples store
2	ir: Add run state fields for ephemeral runs and reused outputs
3	runtime: Bound continuous steps and carry outputs of selected steps
4	api: Add step samples, events, availability and selected-step runs
5	test(ui): add YAML fixtures for the document model tests
6	ui(lib): add shared UI kit, status helpers and right-panel shell
7	ui(canvas): add canvas engine core, toolbars and editor helpers
8	ui(i18n): add workspace message catalogs, first batch
9	ui(canvas): add canvas Flow view, step run panel and workflow panel
10	ui(editor): add YAML document model, canvas model and run source logic
11	ui(editor): Add edit session, YAML format and quick fixes, run actions, tab strip
12	ui(editor): Add canvas graph model, Add step panel, issues popover, run bar
13	ui(canvas): Add layered layout, dependency edges, status styles, reference picker
14	ui(canvas): Add export, flow builder, upstream data panel, output capture
15	ui(canvas): Add node cards, launchers, inspector sections, client issues
16	ui(editor): Add visual editor, step inspector and YAML file panel
17	ui(lists): Open runs on the workflow page; add tab and schedule helpers
18	ui(workspace): Add workspace URL state, legacy redirects and run list links
19	ui(workspace): Add workspace data layer, run facts and Workflow panel
20	ui(workspace): Add run start controls, visible runs and reuse source
21	ui(workspace): Add data provider, bar identity, continuous panel and step list
22	ui(logs): Add run actions cluster, cached logs and log popout page
23	ui(workspace): Add Activity dock, step run view and workflow page
24	test(workspace): Add integration tests for the workspace shell and step view
25	ui(pages): Retire classic run pages and open runs on the workflow page
26	test(editor): Add integration tests for the editor, inspector and run overlay
27	test(ui): Add repository-wide guard tests and ESLint boundary rules
28	e2e: Add workspace helpers and fixtures, update existing specs
29	e2e: Add workspace specs, part 1 of 2
30	e2e: Add workspace specs, part 2 of 2
31	examples: Add the workspace demo workflows

Stack 18/31. Base branch: stack/17-ui13. Review and merge in order; this PR builds on the previous one.
Size: 70 files changed, 6617 insertions(+), 1181 deletions(-).
Checked: Typecheck (tsc) of the whole UI and the unit tests of this PR (Vitest), on top of the previous PR.

Summary

This PR adds the URL model of the workflow workspace (workspaceUrl.ts) and the redirects from old run and tab URLs. It removes the run modal and the split view from the run list page, and adds a command-palette registry, a step retry dialog and the dock tab strip.

Why

One page per workflow needs one URL scheme (?run, ?step, ?dock, ?panel) and old bookmarks must still work. PR 17 adds LegacyRunRedirect and the list helpers. PR 19 builds the data layer on this URL state. PR 20 and later put the bar, step view and Activity panel on it.

Changes

Counts: 31 existing files modified, 1 deleted, 38 new (about half are tests).

• URL state (workflow-workspace/state): workspaceUrl.ts (useWorkspaceUrl, workspace mode, dock tab, open panel), legacyLinks.ts (old section routes to panels and run pages), useLegacyRedirect.ts.
• Dock and layout: DockTabStrip, RunTabsPane, DockHeaderTools, propsEqual, layout/paneActive.ts, zLayers.ts (stack order of layers).
• Canvas helpers: escFree, useEscInStepYaml, useRightPanelClearance (measures the right panel over the canvas).
• Other workspace pieces: bar/useShowRun, continuous/continuousNode, settings/useSettingsLeaveGuard, step/RepeatRule, executions/RunStatusDot and useRunReferenceScope, visual-editor/references/stepReferences.ts.
• Command palette: CommandPaletteProvider gets usePaletteCommands so a page can add a "workflow" group; CommandPaletteDialog shows it.
• Run list: pages/dag-runs/index.tsx drops the modal and selection state; DAGRunTable, DAGRunGroupedView open the run page; DAGRunCard.tsx is deleted. ActivityLanes uses useOpenPage.
• Dialogs and tabs: new StepRetryDialog; ApprovalTab, ChatHistoryTab, HumanTasksTab, NotificationsTab, StepReviewModal, StatusUpdateModal, ParallelExecutionModal, DAGRunOutputs get edits for the new host.
• Layout: Layout.tsx collapses the sidebar below 900 px and adds LayoutChromeProvider; ContentNavigation names workflow sections.

How to review

1. state/workspaceUrl.ts, then legacyLinks.ts and useLegacyRedirect.ts.
2. pages/dag-runs/index.tsx and DAGRunTable.tsx (what is removed).
3. CommandPaletteProvider.tsx and its test.
4. StepRetryDialog.tsx.
5. Layout.tsx, useRightPanelClearance.ts, useSettingsLeaveGuard.ts.

Most attention: the redirect table in legacyLinks.ts (every old URL must land on the right place), and the deletion of the run modal path in pages/dag-runs/index.tsx.

Tests

• New: workspaceUrl, legacyLinks, useLegacyRedirect, useSettingsLeaveGuard, useRightPanelClearance, escFree, useShowRun, DockTabStrip, RunStatusDot, continuousNode, stepReferences, wordingJa, StepRetryDialog, CommandPaletteProvider, ContentNavigation, RunStatusChip, ApprovalTab, ChatHistoryTab.
• Updated: Layout, CommandPalette, DAGRunTable, DAGRunGroupedView, ActivityLanes, NotificationsTab, HumanTasksTab, MonitoringOffer, pages/dag-runs.

Screenshots

These components are used by PR 19 and later; the screenshot shows the dock tab strip and the Activity panel in the final UI.