refactor(composables): migrate JS composables to TypeScript (F3.2)

Convert 7 composables from JS to TS with proper type annotations:
useApi, useCustomFields, useProfileSession, useProfiles, useToast,
useMachineTypesApi, useMachines. Remove deprecated stubs
useComponentModels.js and usePieceModels.js.

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

app/composables/useProfiles.ts

@@ -0,0 +1,74 @@
+import { useState, useRequestHeaders, useRuntimeConfig } from '#imports'
+
+export interface Profile {
+  id: string
+  firstName: string
+  lastName: string
+  [key: string]: unknown
+}
+
+const buildUrl = (path: string): string => {
+  const config = useRuntimeConfig()
+  const base = (config.public.apiBaseUrl as string)?.replace(/\/$/, '') || ''
+  return `${base}${path}`
+}
+
+export function useProfiles() {
+  const profiles = useState<Profile[]>('profiles:list', () => [])
+  const loadingProfiles = useState<boolean>('profiles:loading', () => false)
+  const profilesLoaded = useState<boolean>('profiles:loaded', () => false)
+
+  const getSessionHeaders = (): Record<string, string> | undefined => {
+    if (!import.meta.server) { return undefined }
+    const headers = useRequestHeaders(['cookie'])
+    return headers?.cookie ? { cookie: headers.cookie } : undefined
+  }
+
+  const fetchProfiles = async (): Promise<Profile[]> => {
+    loadingProfiles.value = true
+    try {
+      profiles.value = await $fetch<Profile[]>(buildUrl('/session/profiles'), {
+        method: 'GET',
+        credentials: 'include',
+        headers: getSessionHeaders(),
+      })
+      profilesLoaded.value = true
+    } catch (error) {
+      console.error('Erreur lors du chargement des profils', error)
+      profiles.value = []
+      profilesLoaded.value = false
+    } finally {
+      loadingProfiles.value = false
+    }
+    return profiles.value
+  }
+
+  const createProfile = async ({ firstName, lastName }: { firstName: string; lastName: string }): Promise<Profile> => {
+    const profile = await $fetch<Profile>(buildUrl('/session/profiles'), {
+      method: 'POST',
+      credentials: 'include',
+      body: { firstName, lastName },
+      headers: getSessionHeaders(),
+    })
+    await fetchProfiles()
+    return profile
+  }
+
+  const deleteProfile = async (profileId: string): Promise<void> => {
+    await $fetch(buildUrl(`/session/profiles/${profileId}`), {
+      method: 'DELETE',
+      credentials: 'include',
+      headers: getSessionHeaders(),
+    })
+    await fetchProfiles()
+  }
+
+  return {
+    profiles,
+    loadingProfiles,
+    profilesLoaded,
+    fetchProfiles,
+    createProfile,
+    deleteProfile,
+  }
+}