feat(ui): add governed candidate evidence timeline states

.github/workflows/hr-workspace-candidate-evidence-timeline.yml

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+name: HR Workspace Candidate Evidence Timeline Quality
+
+on:
+  pull_request:
+    branches:
+      - develop
+      - feat/hr-workspace-protected-read-state
+    paths:
+      - "apps/hr-workspace/candidate-evidence-timeline.js"
+      - "apps/hr-workspace/candidate-evidence-timeline.css"
+      - "apps/hr-workspace/candidate-evidence-timeline.stories.js"
+      - "tests/hr-workspace-candidate-evidence-timeline.test.mjs"
+      - "docs/traceability/hr-workspace-candidate-evidence-timeline.md"
+      - "docs/doctoring/hr-workspace-candidate-evidence-accessibility-references.md"
+      - ".github/workflows/hr-workspace-candidate-evidence-timeline.yml"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: hr-workspace-candidate-evidence-timeline-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  candidate-evidence-timeline:
+    name: Candidate evidence timeline contract
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout exact candidate
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          persist-credentials: false
+      - name: Prove exact candidate checkout
+        env:
+          ORGMETRA_EXPECTED_HEAD_SHA: ${{ github.event.pull_request.head.sha || github.sha }}
+        run: test "$(git rev-parse HEAD)" = "$ORGMETRA_EXPECTED_HEAD_SHA"
+      - name: Set up Node.js LTS
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+        with:
+          node-version: "24"
+          check-latest: false
+      - name: Run candidate-evidence accessibility contract with exact coverage
+        run: >-
+          node --test --experimental-test-coverage
+          --test-coverage-lines=100
+          --test-coverage-branches=100
+          --test-coverage-functions=100
+          tests/hr-workspace-candidate-evidence-timeline.test.mjs
+      - name: Require clean checkout
+        run: |
+          git diff --exit-code
+          test -z "$(git status --porcelain)"

apps/hr-workspace/candidate-evidence-timeline.css

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+.candidate-evidence-timeline {
+  display: grid;
+  gap: var(--orgmetra-space-md);
+  max-width: 42rem;
+  padding: var(--orgmetra-space-lg);
+  border: 1px solid var(--orgmetra-border-subtle);
+  border-radius: var(--orgmetra-radius-md);
+  background: var(--orgmetra-surface-card);
+  color: var(--orgmetra-text-primary);
+}
+
+.candidate-evidence-status,
+.candidate-evidence-next-action {
+  display: grid;
+  gap: var(--orgmetra-space-xs);
+  margin: 0;
+}
+
+.candidate-evidence-status span,
+.candidate-evidence-next-action span {
+  color: var(--orgmetra-text-muted);
+}
+
+.candidate-evidence-timeline[data-interaction-state="read-only"] {
+  border-color: var(--orgmetra-border-subtle);
+}
+
+.candidate-evidence-timeline[data-interaction-state="permission-denied"],
+.candidate-evidence-timeline[data-interaction-state="validation-error"],
+.candidate-evidence-timeline[data-interaction-state="error"] {
+  border-color: var(--orgmetra-danger);
+}
+
+.candidate-evidence-timeline[aria-busy="true"] {
+  cursor: progress;
+}
+
+.candidate-evidence-action {
+  justify-self: start;
+  min-height: 44px;
+  padding: var(--orgmetra-space-sm) var(--orgmetra-space-md);
+  border: 0;
+  border-radius: var(--orgmetra-radius-sm);
+  background: var(--orgmetra-action-review);
+  color: #fff;
+  font: inherit;
+  cursor: pointer;
+}
+
+.candidate-evidence-action:hover:not(:disabled) {
+  opacity: 0.88;
+}
+
+.candidate-evidence-action:disabled {
+  cursor: not-allowed;
+  opacity: 0.62;
+}
+
+.candidate-evidence-action:focus-visible {
+  outline: 3px solid var(--orgmetra-focus-ring);
+  outline-offset: 3px;
+}

apps/hr-workspace/candidate-evidence-timeline.js

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+const STATE_MODELS = Object.freeze({
+  idle: Object.freeze({
+    ariaBusy: 'false', ariaLive: 'polite', role: 'status', actionDisabled: false,
+    interactionState: 'default', actionLabel: 'Load candidate evidence',
+    label: 'Review candidate evidence timeline',
+    message: 'Load fresh purpose-authorized governed candidate evidence for the current recruiting scope.',
+    nextAction: 'Load the current governed evidence before relying on this recruiting view.',
+  }),
+  loading: Object.freeze({
+    ariaBusy: 'true', ariaLive: 'polite', role: 'status', actionDisabled: true,
+    interactionState: 'loading', actionLabel: 'Loading candidate evidence',
+    label: 'Loading candidate evidence',
+    message: 'Orgmetra is resolving the authorized evidence references and visible timeline entries for this purpose-bound request.',
+    nextAction: 'Wait for the governed candidate-evidence read to finish.',
+  }),
+  ready: Object.freeze({
+    ariaBusy: 'false', ariaLive: 'polite', role: 'status', actionDisabled: true,
+    interactionState: 'read-only', actionLabel: 'Candidate evidence loaded',
+    label: 'Candidate evidence timeline ready',
+    message: 'This is read-only governed candidate evidence. It does not evaluate, rank, reject, advance, or authorize an employment decision.',
+    nextAction: 'Open only the separately authorized evidence reference needed for accountable human review.',
+  }),
+  empty: Object.freeze({
+    ariaBusy: 'false', ariaLive: 'polite', role: 'status', actionDisabled: false,
+    interactionState: 'read-only', actionLabel: 'Reload candidate evidence',
+    label: 'No candidate evidence is visible here',
+    message: 'No governed candidate evidence is visible in this authorized scope. This is not evidence that no governed candidate evidence exists elsewhere.',
+    nextAction: 'Check the authorized recruiting scope and reload if another permitted evidence view is required.',
+  }),
+  denied: Object.freeze({
+    ariaBusy: 'false', ariaLive: 'assertive', role: 'alert', actionDisabled: false,
+    interactionState: 'permission-denied', actionLabel: 'Review access',
+    label: 'Candidate evidence access denied',
+    message: 'The current actor or HR purpose does not permit this governed candidate-evidence read.',
+    nextAction: 'Check the HR purpose and access authority before requesting candidate evidence again.',
+  }),
+  stale: Object.freeze({
+    ariaBusy: 'false', ariaLive: 'assertive', role: 'alert', actionDisabled: false,
+    interactionState: 'validation-error', actionLabel: 'Reload candidate evidence',
+    label: 'Candidate evidence is stale',
+    message: 'The governed evidence set or recruiting scope changed before this timeline could be relied on.',
+    nextAction: 'Reload the current governed candidate evidence before continuing human review.',
+  }),
+  scopeBlocked: Object.freeze({
+    ariaBusy: 'false', ariaLive: 'assertive', role: 'alert', actionDisabled: false,
+    interactionState: 'validation-error', actionLabel: 'Narrow requested evidence',
+    label: 'Candidate evidence fields are not authorized',
+    message: 'One or more requested evidence fields fall outside the current purpose-bound authorization.',
+    nextAction: 'Narrow the requested evidence fields to the authorized set or obtain the required HR access before retrying.',
+  }),
+  error: Object.freeze({
+    ariaBusy: 'false', ariaLive: 'assertive', role: 'alert', actionDisabled: false,
+    interactionState: 'error', actionLabel: 'Retry governed read',
+    label: 'Candidate evidence unavailable',
+    message: 'The governed candidate-evidence read did not return usable authoritative evidence.',
+    nextAction: 'Do not infer candidate status from cached or partial data; verify the governed evidence service and authorization before retrying.',
+  }),
+});
+
+function requireExactState(value) {
+  if (typeof value !== 'string') {
+    throw new TypeError('candidate-evidence timeline state must be an exact built-in string');
+  }
+  if (!Object.hasOwn(STATE_MODELS, value)) {
+    throw new TypeError(`unsupported candidate-evidence timeline state: ${value}`);
+  }
+  return STATE_MODELS[value];
+}
+
+/** Return immutable accessibility semantics for one purpose-bound candidate-evidence timeline state. */
+export function candidateEvidenceTimelineViewModel(state) {
+  return requireExactState(state);
+}
+
+/** Render static Storybook evidence without accepting caller-controlled candidate values or identifiers. */
+export function candidateEvidenceTimelineMarkup(state) {
+  const model = requireExactState(state);
+  const disabled = model.actionDisabled ? ' disabled' : '';
+  return `<section class="candidate-evidence-timeline" data-figma-node-id="1:64" data-interaction-state="${model.interactionState}" aria-busy="${model.ariaBusy}">\n  <p class="candidate-evidence-status" role="${model.role}" aria-live="${model.ariaLive}"><strong>${model.label}</strong><span>${model.message}</span></p>\n  <p class="candidate-evidence-next-action"><strong>Next action</strong><span>${model.nextAction}</span></p>\n  <button class="candidate-evidence-action" type="button"${disabled}>${model.actionLabel}</button>\n</section>`;
+}

apps/hr-workspace/candidate-evidence-timeline.stories.js

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+import { candidateEvidenceTimelineMarkup } from './candidate-evidence-timeline.js';
+import './candidate-evidence-timeline.css';
+
+export default {
+  title: 'HR Workspace/Candidate Evidence Timeline States',
+  parameters: {
+    design: {
+      type: 'figma',
+      url: 'Orgmetra Baseline — Storybook Inventory node 1:64',
+    },
+  },
+};
+
+function story(state) {
+  return () => candidateEvidenceTimelineMarkup(state);
+}
+
+export const Idle = story('idle');
+export const Loading = story('loading');
+export const ReadyReadOnly = story('ready');
+export const EmptyReadOnly = story('empty');
+export const PermissionDenied = story('denied');
+export const StaleEvidence = story('stale');
+export const EvidenceScopeBlocked = story('scopeBlocked');
+export const Error = story('error');

docs/doctoring/hr-workspace-candidate-evidence-accessibility-references.md

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+# Candidate evidence timeline accessibility references
+
+Reviewed: 2026-08-28 (Asia/Seoul).
+
+This note records primary accessibility design inputs for the active Candidate Evidence timeline interaction slice. It is engineering evidence, not a claim of WCAG certification or conformance for a deployed product.
+
+## Primary standards
+
+World Wide Web Consortium. (2023, October 5). *Web Content Accessibility Guidelines (WCAG) 2.2*. https://www.w3.org/TR/WCAG22/
+
+World Wide Web Consortium. (2023, June 6). *Accessible Rich Internet Applications (WAI-ARIA) 1.2*. https://www.w3.org/TR/wai-aria-1.2/
+
+## Design consequences
+
+- Loading is exposed through `aria-busy` and disables the repeated action while the governed read is in flight.
+- Denied, stale, scope-blocked, and error states use assertive alert semantics and provide a concrete next action rather than silently widening access or relying on cached evidence.
+- Read-only states remain visibly non-authorizing. They do not turn candidate evidence into ranking, rejection, progression, or employment-decision authority.
+- The interactive action retains a visible `:focus-visible` treatment and a 44-pixel minimum target height using existing Orgmetra design tokens.
+- The Figma `Orgmetra Baseline` Storybook Inventory node `1:64` was freshly read on 2026-08-28 and continues to require default, hover, focus, disabled, loading, validation-error, read-only, and high-risk-confirmation states. This slice uses that inventory as design correlation rather than creating parallel geometry.
+
+The active PR must still be revalidated against fresh integrated parents and browser/accessibility evidence before its UI can be described as shipped.

docs/traceability/hr-workspace-candidate-evidence-timeline.md

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+# HR Workspace Candidate Evidence timeline traceability
+
+Status: **active PR evidence only**. This document does not change protected-main shipped truth.
+
+## Ownership boundary
+
+- Protected `develop` already ships governed Candidate Evidence intake through merged PR #41. That backend packet is reference-only, purpose-bound, value-minimized, and not authorized for an employment decision.
+- Parent PR #130 owns the shared HR Workspace protected-read interaction semantics and Figma/Storybook accessibility contract.
+- This dependency-first child owns only the Candidate Evidence timeline presentation/interaction state model. It does not duplicate candidate intake, identity, requisition/Job authority, candidate lifecycle, selection decision, or evidence persistence.
+- Dedicated-writer CWL repositories remain read-only dependencies and are not mutated by this slice.
+
+## Buyer-visible contract
+
+The Recruiting Workspace wireframe names a Candidate Evidence timeline. This slice provides bounded executable states for that surface:
+
+`idle / loading / ready / empty / denied / stale / scopeBlocked / error`.
+
+`ready` is read-only governed evidence. It explicitly does not evaluate, rank, reject, advance, or authorize an employment decision. `empty` means only that no evidence is visible inside the currently authorized scope. Denial, staleness, scope mismatch, and transport failure fail closed with a concrete next action.
+
+The generic state payload intentionally contains no candidate/Person identifiers, names/contact data, requisition/Job identifiers, raw evidence or resume content, assessment/match values, ratings, compensation, credentials/tokens, prompts, or model output. Unsupported runtime values and prototype-inherited names such as `constructor`, `toString`, and `__proto__` are rejected through exact string plus own-key membership checks.
+
+## Design and accessibility evidence
+
+Fresh Figma `Orgmetra Baseline` Storybook Inventory node `1:64` was read on 2026-08-28 and still requires default, hover, focus, disabled, loading, validation-error, read-only, and high-risk-confirmation behavior. The implementation uses existing Orgmetra tokens and Storybook rather than parallel geometry. WCAG 2.2 and WAI-ARIA 1.2 primary references are recorded in `docs/doctoring/hr-workspace-candidate-evidence-accessibility-references.md`.
+
+## Verification contract
+
+`.github/workflows/hr-workspace-candidate-evidence-timeline.yml` must:
+
+1. check out and prove the exact candidate SHA;
+2. use the reviewed Node 24 toolchain;
+3. execute the focused interaction/privacy/fail-closed regression with exact 100% line, branch, and function coverage; and
+4. finish with a clean checkout.
+
+Focused child GREEN is stack-local only. After #53 and #130 integrate, this child must be retargeted/reconciled against fresh `develop` and all applicable browser/accessibility/Foundation/Recovery/SAST/Security and central required workflows must execute again on one resulting exact head. Parent or predecessor checks/reviews never transfer.