update frontend ui, i18n, filters, and deps

frontend/composables/useApi.ts

@@ -0,0 +1,13 @@
+export const useApi = () => {
+  const config = useRuntimeConfig()
+  const apiBase = config.public.apiBase
+
+  const getErrorMessage = (err: unknown, fallback: string) => {
+    const anyErr = err as { data?: { erreur?: string }; message?: string }
+    if (anyErr?.data?.erreur) return anyErr.data.erreur
+    if (anyErr?.message) return anyErr.message
+    return fallback
+  }
+
+  return { apiBase, getErrorMessage }
+}