feat: add API optimizations, cache invalidation and comprehensive test suite

- Add abort controllers and request deduplication to composables
- Add entity type cache invalidation on create/update/delete flows
- Add 179 new tests (utilities, services, composables, components)
- Fix Vue runtime warnings in structure editors

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/composables/useMachines.ts

@@ -17,6 +17,7 @@ export interface Machine {
 
 const machines = ref<Machine[]>([])
 const loading = ref(false)
+const loaded = ref(false)
 
 const resolveLinkCollection = (source: Record<string, unknown>, keys: string[]): unknown[] | undefined => {
   if (!source || typeof source !== 'object') {
@@ -73,10 +74,11 @@ const normalizeMachineResponse = (payload: unknown): Machine | null => {
 }
 
 export function useMachines() {
-  const { showSuccess, showError, showInfo } = useToast()
+  const { showSuccess, showError } = useToast()
   const { get, post, patch, delete: del } = useApi()
 
-  const loadMachines = async (): Promise<void> => {
+  const loadMachines = async (options: { force?: boolean } = {}): Promise<void> => {
+    if (!options.force && loaded.value) return
     loading.value = true
     try {
       const result = await get('/machines')
@@ -86,7 +88,7 @@ export function useMachines() {
           .map((item) => normalizeMachineResponse(item))
           .filter((item): item is Machine => item !== null)
         machines.value = normalized
-        showInfo(`Chargement de ${normalized.length} machine(s) réussi`)
+        loaded.value = true
       }
     } catch (error) {
       console.error('Erreur lors du chargement des machines:', error)