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/state/useToasts.test.ts

@@ -0,0 +1,54 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { clearToasts, dismissToast, showToast, TOAST_TIMEOUT, toasts, useToasts } from '../../src/state/useToasts'
+
+beforeEach(() => {
+  vi.useFakeTimers()
+  clearToasts()
+})
+
+afterEach(() => {
+  clearToasts()
+  vi.useRealTimers()
+})
+
+describe('toast queue', () => {
+  it('queues newest first with success as the default tone', () => {
+    const first = showToast('Saved')
+    const second = showToast('Failed', 'danger')
+    expect(second).toBeGreaterThan(first)
+    expect(toasts.value.map((item) => [item.text, item.tone])).toEqual([
+      ['Failed', 'danger'],
+      ['Saved', 'success'],
+    ])
+  })
+
+  it('dismisses each toast after about 4 seconds', () => {
+    expect(TOAST_TIMEOUT).toBe(4000)
+    showToast('one')
+    vi.advanceTimersByTime(1000)
+    showToast('two')
+    vi.advanceTimersByTime(TOAST_TIMEOUT - 1000)
+    expect(toasts.value.map((item) => item.text)).toEqual(['two'])
+    vi.advanceTimersByTime(1000)
+    expect(toasts.value).toEqual([])
+  })
+
+  it('dismisses on request and cancels that toast timer', () => {
+    const id = showToast('bye')
+    const other = showToast('stay')
+    dismissToast(id)
+    expect(toasts.value.map((item) => item.id)).toEqual([other])
+    dismissToast(id)
+    dismissToast(999_999)
+    expect(vi.getTimerCount()).toBe(1)
+  })
+
+  it('clears every toast and timer', () => {
+    showToast('a')
+    showToast('b')
+    clearToasts()
+    expect(toasts.value).toEqual([])
+    expect(vi.getTimerCount()).toBe(0)
+    expect(useToasts().showToast).toBe(showToast)
+  })
+})