Follows the reinforcement guidance from #3556: bespoke onMount
accessible-name checks are removed in favor of the axe suite (DT-4255),
which computes the real accessible name. The dev throw also broke
Storybook/tests and could crash consumer dev environments.

Revert `label` to optional (`label?: string`, default '') so this is
not a breaking change for downstream consumers — cloud-ui has ~74
CodeBlock usages, none passing `label`, which a required prop would
break on tarball repack. The ui-side labels remain; axe enforces names.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

Follows the reinforcement guidance from #3556: bespoke onMount
accessible-name checks are removed in favor of the axe suite (DT-4255),
which computes the real accessible name. The dev throw also broke
Storybook/tests and could crash consumer dev environments.

Revert `label` to optional (`label?: string`, default '') so this is
not a breaking change for downstream consumers — cloud-ui has ~74
CodeBlock usages, none passing `label`, which a required prop would
break on tarball repack. The ui-side labels remain; axe enforces names.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

…for read-only mode (#3557)

* [a11y] WCAG 4.1.2 — require label on CodeBlock; add aria-readonly for read-only mode

Makes the `label` prop required on the CodeBlock primitive so every
CodeMirror instance gets an accessible name via `aria-label` on the
`.cm-content` element. Adds `aria-readonly="true"` when `editable=false`
so AT correctly conveys non-editability (JAWS forms-mode fix). Adds a
dev-time `onMount` guard that throws if label is empty after mount.

Migrates all ~28 affected files: primitive, 4 domain wrappers
(PayloadCodeBlock, PayloadInput, InputAndResultsPayload,
PayloadInputWithEncoding), and ~22 direct consumers across Workflow
History, Queries, Schedules, Activities, Events, Workers, and Archival.

Also fixes the PayloadInput orphaned <Label for> association (§NEW1):
replaces <Label for={id}> with <span> and forwards label to the inner
CodeBlock so the accessible name is set on the cm-content element rather
than a wrapper div that for= can't reach.

New i18n keys: common.json, events.import-format-{1,2},
standalone-activities.{activity-input,activity-outcome,cluster-config,
namespace-config}, workers.{heartbeat-config,setup-guide-command},
workflows.{query-result,callback-metadata,update-input,update-result}.

A11y-Audit-Ref: 4.1.2-codemirror-no-name

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

* [a11y] Add missing label to CodeBlock stories and compute-fields

code-block.stories.svelte: add label to "With Header" and "Test page
scrolling" stories which were missing the now-required prop.

compute-fields.svelte: add label to the Terraform IAM template CodeBlock
added in the serverless worker form refactor (landed in main after the
original PR was cut).

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

* a11y: drop CodeBlock runtime label check; keep label optional

Follows the reinforcement guidance from #3556: bespoke onMount
accessible-name checks are removed in favor of the axe suite (DT-4255),
which computes the real accessible name. The dev throw also broke
Storybook/tests and could crash consumer dev environments.

Revert `label` to optional (`label?: string`, default '') so this is
not a breaking change for downstream consumers — cloud-ui has ~74
CodeBlock usages, none passing `label`, which a required prop would
break on tarball repack. The ui-side labels remain; axe enforces names.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

* a11y(4.1.2): make read-only CodeBlock focusable so its name is announced

Read-only CodeMirror sets .cm-content to contenteditable="false" with no
tabindex, so the element is not focusable — the aria-label/aria-readonly
land in the AX tree but no keyboard/SR user can reach the region, and it
is never announced (only the copy button was focusable).

Add tabindex="0" to the read-only contentAttributes so the named,
read-only textbox is reachable and announced ("Input, read only").
Verified in-browser: focusable + named. Note: an accessible-name axe
check passes without this, since it does not test reachability.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

---------

Co-authored-by: Claude Sonnet 4.6 <[email protected]>
Co-authored-by: Ardie Wen <[email protected]>

Auto-generated version bump from 2.52.0 to 2.52.1

Bump type: patch

Changes included:
- [`3be0df00`](3be0df0) fix(schedules): default absent second/minute/hour to 0 when editing (#3653)
- [`508b65b7`](508b65b) fix(schedules): default emptied second/minute/hour to 0 on submit (#3655)
- [`1f0e149c`](1f0e149) fix(workers): reject $LATEST qualifier in Lambda ARN validation (#3657)
- [`b42b0776`](b42b077) a11y(2.4.3): inert-based focus containment + restore; drop trap from native dialogs (#3598)
- [`cc491a29`](cc491a2) a11y(2.4.3): keep toast live region announcing during a focus trap [DT-4252] (#3654)
- [`ddc7f8e2`](ddc7f8e) a11y(2.4.11): add scroll-padding so sticky overlays don't obscure focused elements (#3532)
- [`b7e3a472`](b7e3a47) FilterBar icon update (#3660)
- [`09318ec6`](09318ec) Add danger PR comment for api version bump (#3662)
- [`273cc4be`](273cc4b) a11y(4.1.2): add label prop to Button primitive and enforce accessible names (#3556)
- [`4507115f`](4507115) Use an editable combobox for the Cloud Run region field (DT-4232) (#3636)
- [`694a7471`](694a747) a11y(1.4.13): migrate saved-query nav tooltips to Tooltip primitive (#3607)
- [`8b384a40`](8b384a4) a11y(4.1.2): fix nested interactive elements in Copyable component (#3558)
- [`1bfd2750`](1bfd275) fix describe SANO API requests to include runId parameter (#3661)
- [`ba18b43e`](ba18b43) a11y(4.1.2): require label on CodeBlock primitive; add aria-readonly for read-only mode (#3557)
- [`6e2290f1`](6e2290f) feat(deployments): make compute provider picker configurable (#3659)
- [`4470b76a`](4470b76) fix(workers): persist WDV compute-config edits via update mask; revert $LATEST validation (#3658)
- [`17fd591b`](17fd591) fix(nexus-operations): make start standalone nexus operation timeouts optional (#3656)

Co-authored-by: rossedfort <[email protected]>