fix(desktop): give the delivery-target group an accessible name

Field renders its visible label as <label htmlFor>, but that only
associates with labelable elements (input, select, ...), not the
div[role="group"] DeliverCheckboxes renders. The checkbox group had
no accessible name for assistive tech.

Field now stamps an id on its label (`${htmlFor}-label`) and
DeliverCheckboxes references it via aria-labelledby, so the group
picks up the same visible label text instead of duplicating it.

Addresses review feedback on PR #73886.

apps/desktop/src/app/cron/deliver-checkboxes.test.tsx

@@ -0,0 +1,31 @@
+import { cleanup, render, screen } from '@testing-library/react'
+import { afterEach, describe, expect, it } from 'vitest'
+
+import { Field } from '@/components/ui/field'
+import { en } from '@/i18n/en'
+
+import { DeliverCheckboxes } from './index'
+
+afterEach(cleanup)
+
+// Regression for the delivery-target group losing its accessible name: `Field`
+// renders the visible label as `<label htmlFor>`, which only associates with
+// labelable elements (input, select, ...) — not a `div[role="group"]`. The
+// group must pick up the label via `aria-labelledby` instead.
+describe('DeliverCheckboxes accessible name', () => {
+  it('exposes the Field label as the group name', () => {
+    render(
+      <Field htmlFor="cron-deliver" label={en.cron.deliverLabel}>
+        <DeliverCheckboxes
+          c={en.cron}
+          id="cron-deliver"
+          onChange={() => {}}
+          targets={[{ home_env_var: null, home_target_set: true, id: 'local', name: 'This desktop' }]}
+          value="local"
+        />
+      </Field>
+    )
+
+    expect(screen.getByRole('group', { name: en.cron.deliverLabel })).toBeTruthy()
+  })
+})

apps/desktop/src/app/cron/index.tsx

@@ -789,7 +789,7 @@ function deliverTargetLabel(target: CronDeliveryTarget, c: Translations['cron'])
 // blueprint form. The scheduler accepts comma-separated targets, so users can
 // keep results local while also sending them to connected platforms. Preserve
 // selected targets missing from discovery so editing never drops a saved route.
-function DeliverCheckboxes({
+export function DeliverCheckboxes({
   c,
   id,
   onChange,
@@ -813,7 +813,12 @@ function DeliverCheckboxes({
   ]
 
   return (
-    <div className="grid gap-2 rounded-md border border-input px-3 py-2.5" id={id} role="group">
+    <div
+      aria-labelledby={`${id}-label`}
+      className="grid gap-2 rounded-md border border-input px-3 py-2.5"
+      id={id}
+      role="group"
+    >
       {options.map((target, index) => {
         const checked = selected.includes(target.id)
         const checkboxId = `${id}-${index}`

apps/desktop/src/components/ui/field.tsx

@@ -23,7 +23,11 @@ export function Field({
 }) {
   return (
     <div className="grid gap-1.5">
-      <label className="flex items-baseline gap-2 text-xs font-medium text-foreground" htmlFor={htmlFor}>
+      <label
+        className="flex items-baseline gap-2 text-xs font-medium text-foreground"
+        htmlFor={htmlFor}
+        id={htmlFor ? `${htmlFor}-label` : undefined}
+      >
         {label}
         {optional && optionalLabel && (
           <span className="text-[0.65rem] font-normal text-muted-foreground">{optionalLabel}</span>