[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 18
• Next: PR 20

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 19/31. Base branch: stack/18-ui14. Review and merge in order; this PR builds on the previous one.
Size: 62 files changed, 7682 insertions(+), 514 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 data contracts and hooks of the workflow workspace (run history, sub runs, permissions, test runs, run spec), the run facts and edit buttons of the bar, the Workflow panel and the runtime profile section. It also moves the run summary blocks out of DAGStatusOverview and adds ghost rows to the run timeline items.

Why

Every workspace component reads the same run and workflow data through typed hooks. This PR gives those types and hooks before any component needs them. It builds on the URL state of PR 18. PR 20 adds run selection and start controls, and PR 21 adds WorkspaceDataProvider, which wires the hooks together.

Changes

Counts: 10 existing files modified, 52 new files (about half are tests).

• Data (workflow-workspace/data): types.ts, context.ts (WorkspaceDataContext), useRunHistory, useSubRuns, useWorkspacePermissions, handlerMapping (lifecycle handler nodes), runFacts (isNeverRun, run creation time), testRun (10 minute TTL of a test run). contracts.ts re-exports the public types.
• Canvas: WorkspaceEditorContext (editor handle and state), canvasRunPolicy (which run the canvas shows), useTestRunNotice, useStepViewHost, useEscClearsStep.
• Bar: RunFacts (inline and stacked layouts), WorkflowEditButtons (rename, delete), useFactTiers. DAGEditButtons is rebuilt on a new useDAGEditActions hook.
• Dock: dockTabs (which tabs a run shows), runExtents (lanes of run bars), FreezeWhenHidden, tabs/AgentRunSummary, tabs/stepScope.
• Panel and profile: panel/WorkflowTabsPanel; profile/RuntimeProfileSection, DotenvBlock, dotenv.ts, runtimeProfile.ts (layered environment of a run).
• Other: executions/useRunSpec, step/StepOutputRows.
• Shared run UI: new RunSummaryBlocks (progress, status message, error, conditions); DAGStatusOverview uses it. DAGSettingsTab and IncidentsTab report unsaved changes.
• timelineItems.ts: ghost rows for steps that a run reused, time-axis ticks with date-aware labels.
• WorkerList, WorkerMetrics, pages/workers get small edits.

How to review

1. data/types.ts, context.ts, contracts.ts.
2. data/useRunHistory.ts, useSubRuns.ts, runFacts.ts.
3. dock/dockTabs.ts and canvas/canvasRunPolicy.ts.
4. timelineItems.ts (ghost rows).
5. RunSummaryBlocks.tsx against the removed code in DAGStatusOverview.tsx.
6. profile/ files.

Most attention: the ghost-row and axis logic in timelineItems.ts, and the equivalence of DAGStatusOverview before and after the extraction.

Tests

• New: handlerMapping, testRun, dockTabs, runExtents, canvasRunPolicy, useTestRunNotice, WorkspaceEditorContext, useRunSpec, RunFacts, WorkflowEditButtons, AgentRunSummary, stepScope, RuntimeProfileSection, DotenvBlock, dotenv, runtimeProfile, RunSummaryBlocks, DAGRunOutputs, DAGSettingsTab, IncidentsTab, DAGEditButtons; shared data/__tests__/fixtures.ts.
• Updated: timelineItems (large), DAGStatusOverview.

Screenshots

These components are used by PR 21 and later; the screenshot shows the bar with run facts in the final UI.