feat(admin): open controller-link settings entries from the settings index

A settings entry with a controller opens that controller's route from
its card (settingsPath); singleton cards still open /settings/<code>.
On a linked controller with no navigation entry of its own the rail
marks Settings current, the breadcrumbs read Settings > entry label
(plus the record title on record and create routes) and the page title
uses the entry label. The settings docs describe the admin behaviour;
the embedded admin shell is rebuilt.

admin/tests/app/pageTitle.test.ts

@@ -33,6 +33,17 @@ describe('documentTitleForRoute', () => {
     expect(documentTitleForRoute((await routerAt('/settings/mail')).currentRoute.value)).toBe('Mail | SummerCMS')
   })
 
+  it('uses the settings entry label on a settings-linked controller', async () => {
+    await signIn()
+    setNavigation(navigationFixture.data)
+    const locales = { ...settingsFixture.list.data[0]!, code: 'locales', label: 'Locales', model: '', controller: 'acme.lang.locales' }
+    setSettings([...settingsFixture.list.data, locales])
+    expect(documentTitleForRoute((await routerAt('/acme/lang/locales')).currentRoute.value)).toBe('Locales | SummerCMS')
+    expect(documentTitleForRoute((await routerAt('/acme/lang/locales/3')).currentRoute.value)).toBe('Locales | SummerCMS')
+    setRecordCrumb('Polish')
+    expect(documentTitleForRoute((await routerAt('/acme/lang/locales/3')).currentRoute.value)).toBe('Polish | SummerCMS')
+  })
+
   it('uses translated indicators for login, the empty home and not found', async () => {
     expect(documentTitleForRoute((await routerAt('/login')).currentRoute.value)).toBe('Witaj ponownie | SummerCMS')
     await signIn()

admin/tests/form/Settings.test.ts

@@ -53,6 +53,14 @@ describe('settings index (D-21)', () => {
     expect(link.text()).toBe('Search')
     expect(wrapper.find('[data-settings-group] h2').exists()).toBe(false)
   })
+
+  it('opens a controller-link entry on its controller route and keeps singleton links', async () => {
+    const link = { ...settingsFixture.list.data[0]!, code: 'locales', label: 'Locales', model: '', controller: 'acme.demo.locales' }
+    setSettings([...settingsFixture.list.data, link])
+    const { wrapper } = await mountApp('/settings', routes())
+    expect(wrapper.find('[data-settings="locales"]').attributes('href')).toMatch(/\/acme\/demo\/locales$/)
+    expect(wrapper.find('[data-settings="mail"]').attributes('href')).toBe('/settings/mail')
+  })
 })
 
 describe('settings form (D-21)', () => {

admin/tests/shell/Breadcrumbs.test.ts

@@ -72,6 +72,37 @@ describe('breadcrumbs', () => {
     expect((await crumbsAt('/settings/unknown')).labels).toEqual(['Ustawienia'])
   })
 
+  it('reads Ustawienia and the entry label on a settings-linked controller', async () => {
+    const locales = { ...settingsFixture.list.data[0]!, code: 'locales', label: 'Locales', model: '', controller: 'acme.lang.locales' }
+    const crumbsWithLink = async (path: string) => {
+      await signIn()
+      setNavigation(navigationFixture.data)
+      setSettings([...settingsFixture.list.data, locales])
+      const router = await routerAt(path)
+      const wrapper = mount(Breadcrumbs, { global: { plugins: [router] } })
+      await flushPromises()
+      const items = wrapper.findAll('[data-crumb]')
+      return {
+        labels: items.map((item) => item.text()),
+        links: items.map((item) => (item.find('a').exists() ? item.find('a').attributes('href') : null)),
+        current: items.map((item) => item.find('[aria-current="page"]').exists()),
+      }
+    }
+    let crumbs = await crumbsWithLink('/acme/lang/locales')
+    expect(crumbs.labels).toEqual(['Ustawienia', 'Locales'])
+    expect(crumbs.links).toEqual(['/settings', null])
+    expect(crumbs.current).toEqual([false, true])
+
+    setRecordCrumb('Polish')
+    crumbs = await crumbsWithLink('/acme/lang/locales/3')
+    expect(crumbs.labels).toEqual(['Ustawienia', 'Locales', 'Polish'])
+    expect(crumbs.links).toEqual(['/settings', '/acme/lang/locales', null])
+
+    setRecordCrumb('')
+    crumbs = await crumbsWithLink('/acme/lang/locales/create')
+    expect(crumbs.labels).toEqual(['Ustawienia', 'Locales'])
+  })
+
   it('is empty outside any permitted plugin', async () => {
     expect((await crumbsAt('/acme/secret/things')).labels).toEqual([])
     expect((await crumbsAt('/acme/demo/unlisted')).labels).toEqual(['Demo'])

admin/tests/shell/PluginRail.test.ts

@@ -59,6 +59,20 @@ describe('plugin rail', () => {
     expect(link.attributes('aria-current')).toBe('page')
   })
 
+  it('marks Ustawienia current on a settings-linked controller without a navigation entry', async () => {
+    const locales = { ...settingsFixture.list.data[0]!, code: 'locales', label: 'Locales', model: '', controller: 'acme.lang.locales' }
+    const widgets = { ...locales, code: 'widgets', label: 'Widgets', controller: 'acme.demo.widgets' }
+    setSettings([...settingsFixture.list.data, locales, widgets])
+    const { wrapper } = await mountRail('/acme/lang/locales')
+    expect(wrapper.find('[data-rail-settings]').attributes('aria-current')).toBe('page')
+    expect(wrapper.findAll('[data-rail-item][aria-current="page"]')).toHaveLength(0)
+
+    // A linked controller that also has a navigation entry keeps its plugin.
+    const nav = await mountRail('/acme/demo/widgets')
+    expect(nav.wrapper.find('[data-rail-settings]').attributes('aria-current')).toBeUndefined()
+    expect(nav.wrapper.find('[data-rail-item="demo"]').attributes('aria-current')).toBe('page')
+  })
+
   it('offers menu semantics and the expand button after a manual collapse', async () => {
     const { wrapper } = await mountRail('/acme/demo/widgets')
     expect(wrapper.find('[data-sidebar-expand]').exists()).toBe(false)

admin/tests/state/useSettings.test.ts

@@ -6,6 +6,8 @@ import {
   settings,
   settingsEntry,
   settingsGroups,
+  settingsLinkFor,
+  settingsPath,
   useSettings,
 } from '../../src/state/useSettings'
 import { settingsFixture } from '../fixtures/typed'
@@ -44,4 +46,22 @@ describe('useSettings (D-21)', () => {
       ['System', ['mail', 'search']],
     ])
   })
+
+  it('links a singleton to its form and a controller link to the controller route', () => {
+    const singleton = settingsFixture.list.data[0]!
+    expect(settingsPath({ ...singleton, code: 'a b' })).toBe('/settings/a%20b')
+    expect(settingsPath({ ...singleton, code: 'locales', model: '', controller: 'acme.demo.locales' })).toBe('/acme/demo/locales')
+    expect(settingsPath({ ...singleton, code: 'broken', model: '', controller: 'acme.demo' })).toBe('/settings')
+    expect(useSettings().settingsPath).toBe(settingsPath)
+  })
+
+  it('finds the link entry that opens a controller, never a singleton', () => {
+    const link = { ...settingsFixture.list.data[0]!, code: 'locales', model: '', controller: 'acme.demo.locales' }
+    setSettings([...settingsFixture.list.data, link])
+    expect(settingsLinkFor('acme.demo.locales')?.code).toBe('locales')
+    expect(settingsLinkFor('acme.demo.widgets')).toBeNull()
+    expect(settingsLinkFor('')).toBeNull()
+    expect(settingsLinkFor(null)).toBeNull()
+    expect(useSettings().settingsLinkFor).toBe(settingsLinkFor)
+  })
 })