fix(tests) : fix stale unit tests for useToast and useEntityTypes

useToast.clearAll() now clears the dedup map to prevent test pollution,
and useEntityTypes error test expectation matches actual French message.

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

app/composables/useToast.ts

@@ -76,6 +76,7 @@ export function useToast() {
 
   const clearAll = (): void => {
     toasts.value = []
+    recentMessages.clear()
   }
 
   return {