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/src/views/ListView.vue

@@ -39,7 +39,11 @@ const schema = ref<ListSchema | null>(null)
 const rows = ref<AdminRecord[]>([])
 const meta = ref<ListMeta | null>(null)
 const loading = ref(true)
-const failed = ref(false)
+// The schema and the rows load in parallel; either failing is announced, so a
+// list response that arrives after a failed schema never hides the failure.
+const schemaFailed = ref(false)
+const listFailed = ref(false)
+const failed = computed(() => schemaFailed.value || listFailed.value)
 const selected = ref<RowId[]>([])
 const deleting = ref(false)
 const confirm = useConfirm()
@@ -92,24 +96,22 @@ let generation = 0
 async function loadList(): Promise<void> {
   const current = ++generation
   loading.value = true
-  failed.value = false
+  listFailed.value = false
   const result = await api.GET('/{vendor}/{plugin}/{controller}', { params: { path, query: query.value } })
   if (current !== generation) {
     return
   }
   rows.value = result.data?.data ?? []
   meta.value = result.data?.meta ?? null
-  failed.value = !result.data
+  listFailed.value = !result.data
   loading.value = false
 }
 
 async function load(): Promise<void> {
   const result = await api.GET('/{vendor}/{plugin}/{controller}/schema/list', { params: { path } })
   schema.value = result.data?.data ?? null
-  if (!schema.value) {
-    failed.value = true
-    loading.value = false
-  }
+  schemaFailed.value = !schema.value
+
 }
 
 void load()