feat(quick-261022-k9k): admin save shortcuts and Create and new on record forms

- app/hotkeys.ts: dependency-free data-hotkey core (Ctrl/Cmd+S, Ctrl/Cmd+Enter,
  Ctrl/Cmd+Shift+S, Esc, / and ?), innermost-modal root, capture-phase modifier
  listener, platform labels and the help-dialog state
- Button hotkey prop (data-hotkey, aria-keyshortcuts); shortcuts installed by AppShell
- FormView: save keys and tooltips, Create and new on create forms via remountView
- phrasebook: form.create_and_new and the shortcuts group (en, pl)

admin/tests/fixtures/lang.json

@@ -246,6 +246,9 @@
     "backend::lang.form.create": {
       "other": "Utwórz"
     },
+    "backend::lang.form.create_and_new": {
+      "other": "Utwórz i nowy"
+    },
     "backend::lang.form.delete": {
       "other": "Usuń"
     },
@@ -845,6 +848,24 @@
     },
     "backend::lang.settings.title": {
       "other": "Ustawienia"
+    },
+    "backend::lang.shortcuts.description": {
+      "other": "Skróty dostępne na tym ekranie."
+    },
+    "backend::lang.shortcuts.help": {
+      "other": "Pokaż skróty klawiaturowe"
+    },
+    "backend::lang.shortcuts.hint": {
+      "other": ":label (:keys)"
+    },
+    "backend::lang.shortcuts.leave": {
+      "other": "Anuluj i wróć"
+    },
+    "backend::lang.shortcuts.search": {
+      "other": "Przejdź do wyszukiwania"
+    },
+    "backend::lang.shortcuts.title": {
+      "other": "Skróty klawiaturowe"
     }
   },
   "meta": {

admin/tests/smoke/shortcuts.smoke.test.ts

@@ -0,0 +1,68 @@
+// Keyboard shortcuts on the whole app (mounted with attachTo, since the
+// shortcut listener reads the document): the save keys on record forms.
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { enableAutoUnmount, flushPromises } from '@vue/test-utils'
+import { setBundle } from '../../src/app/i18n'
+import { clearUser } from '../../src/state/useAuth'
+import { setNavigation } from '../../src/state/useNavigation'
+import { clearToasts } from '../../src/state/useToasts'
+import lang from '../fixtures/lang.json'
+import formSchema from '../fixtures/widgets.form-schema.json'
+import record from '../fixtures/widgets.record.json'
+import { API, mountApp, requestsTo, type Route } from '../helpers'
+
+const RECORD = `${API}/acme/demo/widgets/1`
+
+const formRoutes: Record<string, Route> = {
+  [`GET ${API}/acme/demo/widgets/schema/form`]: { body: formSchema },
+  [`GET ${RECORD}`]: { body: record },
+  [`PUT ${RECORD}`]: { body: record },
+}
+
+beforeEach(() => {
+  clearUser()
+  setNavigation([])
+  clearToasts()
+  setBundle(lang.data, 'pl')
+  vi.spyOn(navigator, 'platform', 'get').mockReturnValue('Linux x86_64')
+})
+
+afterEach(() => {
+  document.body.innerHTML = ''
+})
+
+// Registered after the cleanup above, so it runs first (hooks run as a
+// stack): the app unmounts, with its listeners and portals, before the body
+// is cleared.
+enableAutoUnmount(afterEach)
+
+function press(target: Element, key: string, init: KeyboardEventInit = {}): KeyboardEvent {
+  const event = new KeyboardEvent('keydown', { key, bubbles: true, cancelable: true, ...init })
+  target.dispatchEvent(event)
+  return event
+}
+
+describe('record form save shortcuts', () => {
+  it('saves an update form on Ctrl+S and Cmd+S without the browser Save page', async () => {
+    const { calls } = await mountApp('/acme/demo/widgets/1', formRoutes, { attach: true })
+
+    const ctrl = press(document.body, 's', { ctrlKey: true })
+    expect(ctrl.defaultPrevented).toBe(true)
+    await flushPromises()
+    expect(requestsTo(calls, 'PUT', RECORD)).toHaveLength(1)
+
+    const cmd = press(document.body, 's', { metaKey: true })
+    expect(cmd.defaultPrevented).toBe(true)
+    await flushPromises()
+    expect(requestsTo(calls, 'PUT', RECORD)).toHaveLength(2)
+  })
+
+  it('shows the shortcut in the save button tooltip', async () => {
+    const { wrapper } = await mountApp('/acme/demo/widgets/1', formRoutes, { attach: true })
+
+    const save = wrapper.get('[data-action="save"]')
+    expect(save.attributes('title')).toBe('Zapisz (Ctrl+S)')
+    expect(save.attributes('aria-keyshortcuts')).toBe('Control+S Meta+S')
+    expect(wrapper.get('[data-action="save-close"]').attributes('title')).toBe('Zapisz i zamknij (Ctrl+Enter)')
+  })
+})