test(16.2-06): admin SPA coverage of plugin field types and View site

- fieldTypes: one load per script URL, failed and refused scripts
  reported, global styles enabled on every screen, empty list on failure
- registry, formState, FormField and ListView: plugin renderers, locale
  maps, notices as literal text, unknown column types as text
- AppShell: the View site link's href, target, rel and en/pl label

admin/tests/form/formState.test.ts

@@ -7,6 +7,7 @@ import {
   fieldErrors,
   focusField,
   initialValues,
+  isMLField,
   mergeMLValue,
   noticeLines,
   panelDomId,
@@ -324,3 +325,45 @@ describe('noticeLines', () => {
     expect(noticeLines([{ field: 'x', message: '' }])).toEqual({})
   })
 })
+
+describe('plugin field values (Phase 16.2)', () => {
+  const plain: FormField = { name: 'notes', type: 'notes', element: 'acme-demo-notes' }
+  const translatable: FormField = { name: 'body', type: 'notesml', element: 'acme-demo-notesml', translatable: true }
+
+  it('treats only a translatable plugin field as a locale map', () => {
+    expect(isMLField(translatable)).toBe(true)
+    expect(isMLField(plain)).toBe(false)
+    expect(isMLField({ type: 'notesml', translatable: true })).toBe(false)
+    expect(isMLField({ type: 'mltext' })).toBe(true)
+    expect(isMLField(undefined)).toBe(false)
+  })
+
+  it('seeds a translatable plugin field with every enabled locale, a plain one with nothing', () => {
+    expect(initialValues([translatable, plain], ['pl', 'en'])).toEqual({ body: { pl: '', en: '' } })
+    expect(initialValues([{ ...plain, default: '<p>x</p>' }], ['pl'])).toEqual({ notes: '<p>x</p>' })
+  })
+
+  it('sends a translatable value as a locale record and a plain value as it is', () => {
+    const values = { body: { pl: '<p>P</p>', en: '<p>E</p>', de: 7 }, notes: { blocks: [1] }, other: 'x' }
+    expect(editablePayload([translatable, plain], values)).toEqual({ body: { pl: '<p>P</p>', en: '<p>E</p>' }, notes: { blocks: [1] } })
+    expect(editablePayload([{ ...plain, readOnly: true }], values)).toEqual({})
+    expect(editablePayload([plain], {})).toEqual({})
+  })
+
+  it('groups notices per field, keeping their order, and skips malformed ones', () => {
+    const lines = noticeLines([
+      { field: 'body', locale: 'en', message: 'second locale first' },
+      { field: 'body', locale: 'pl', message: '1 element was removed: style' },
+      { field: 'body', message: 'no locale' },
+      { field: 'notes', locale: '', message: 'empty locale' },
+      { field: '', message: 'no field name' },
+      null as unknown as { field: string; message: string },
+      { field: 'notes', message: 42 as unknown as string },
+    ])
+    expect(lines).toEqual({
+      body: ['EN: second locale first', 'PL: 1 element was removed: style', 'no locale'],
+      notes: ['empty locale'],
+      '': ['no field name'],
+    })
+  })
+})