test(10-05): bring every SPA module, composable and component under Vitest

- 41 unit and component suites under admin/tests/{app,state,shell,list,form,relation,views,ui}
  covering states and a11y roles; every src module is imported by a test
- typed fixture helper assigns each JSON fixture to its generated OpenAPI type
- fix: iconFor ignores inherited object members such as "constructor"
- fix: field controls import ./control instead of the registry (import cycle
  left a renderer unregistered depending on module load order)
- fix: dropdown shows the placeholder for an unknown stored value next to an emptyOption
- fix: list announces a failed schema load even when the rows arrive after it
- tailwind no longer scans admin/tests; boardwalk/dist rebuilt

admin/tests/list/CellValue.test.ts

@@ -0,0 +1,77 @@
+import { beforeEach, describe, expect, it } from 'vitest'
+import { mount } from '@vue/test-utils'
+import CellValue from '../../src/components/list/CellValue.vue'
+import type { ListColumn } from '../../src/api/types'
+import { listColumn } from '../fixtures/typed'
+import { resetState } from '../helpers'
+
+function cell(column: ListColumn, value: unknown) {
+  return mount({ components: { CellValue }, props: [], template: '<span data-cell><CellValue :column="column" :value="value" /></span>', data: () => ({ column, value }) })
+}
+
+const text = listColumn('name')
+const datetime = listColumn('created_at')
+const toggle = listColumn('active')
+
+beforeEach(() => {
+  resetState()
+})
+
+describe('cell value (D-12)', () => {
+  it.each([
+    ['a string', 'Blue', 'Blue'],
+    ['a number', 12, '12'],
+    ['an array', ['small', 3, null, ''], 'small, 3'],
+    ['a boolean true', true, 'Tak'],
+    ['a boolean false', false, 'Nie'],
+  ])('renders %s as plain text', (_label, value, expected) => {
+    const wrapper = cell(text, value)
+    expect(wrapper.text()).toBe(expected)
+    expect(wrapper.find('[data-empty]').exists()).toBe(false)
+  })
+
+  it.each([
+    ['null', null],
+    ['undefined', undefined],
+    ['an empty string', ''],
+    ['an object', { nested: true }],
+    ['an empty array', []],
+  ])('renders %s as a muted dash', (_label, value) => {
+    const wrapper = cell(text, value)
+    expect(wrapper.find('[data-empty]').text()).toBe('—')
+  })
+
+  it('never renders markup from a value', () => {
+    const wrapper = cell(text, '<img src=x onerror=alert(1)>')
+    expect(wrapper.find('img').exists()).toBe(false)
+    expect(wrapper.text()).toBe('<img src=x onerror=alert(1)>')
+  })
+
+  it('formats datetimes as YYYY-MM-DD HH:mm in tabular numbers', () => {
+    const wrapper = cell(datetime, '2026-09-21T14:32:00')
+    expect(wrapper.text()).toBe('2026-09-21 14:32')
+    expect(wrapper.find('span.tabular-nums').exists()).toBe(true)
+    expect(cell(datetime, 'not a date').text()).toBe('not a date')
+    expect(cell(datetime, null).find('[data-empty]').exists()).toBe(true)
+    expect(cell(datetime, true).find('[data-empty]').exists()).toBe(true)
+  })
+
+  it.each([
+    [true, 'true', 'Tak'],
+    [1, 'true', 'Tak'],
+    ['yes', 'true', 'Tak'],
+    [false, 'false', 'Nie'],
+    [0, 'false', 'Nie'],
+    ['0', 'false', 'Nie'],
+    ['FALSE', 'false', 'Nie'],
+  ])('renders the switch value %j as the %s pill', (value, state, label) => {
+    const wrapper = cell(toggle, value)
+    expect(wrapper.find('[data-switch]').attributes('data-switch')).toBe(state)
+    expect(wrapper.text()).toBe(label)
+  })
+
+  it('renders an empty switch value as a dash', () => {
+    expect(cell(toggle, null).find('[data-empty]').exists()).toBe(true)
+    expect(cell(toggle, null).find('[data-switch]').exists()).toBe(false)
+  })
+})