refactor(members): consolidate Platform Admin + Org members into shared useMembers

- useMembers.ts gains a scope param ('organisation' | 'platform') on list,
  invite, update-role, and remove; endpoints branch accordingly.
- Platform Admin's [id].vue now consumes useMembers via scope='platform';
  deleted the duplicated useInviteOrganisationMember / useRemoveOrganisationMember
  / useUpdateOrganisationMemberRole helpers from useAdmin.ts.
- Deduplicated InviteMemberPayload / UpdateMemberRolePayload / AdminOrganisationMember
  from types/admin.ts; Member is now the canonical type.
- SettingsMembers.vue and EditMemberRoleDialog.vue removed (no remaining imports).
- InviteMemberDialog accepts an optional scope prop and is restricted to the
  two organisation-level roles matching the /members UX.

apps/app/src/pages/platform/organisations/[id].vue

@@ -3,13 +3,16 @@ import {
   useAdminOrganisation,
   useUpdateAdminOrganisation,
   useDeleteAdminOrganisation,
-  useInviteOrganisationMember,
-  useRemoveOrganisationMember,
-  useUpdateOrganisationMemberRole,
 } from '@/composables/api/useAdmin'
+import {
+  useInviteMember,
+  useRemoveMember,
+  useUpdateMemberRole,
+} from '@/composables/api/useMembers'
 import { useAuthStore } from '@/stores/useAuthStore'
 import { useOrganisationStore } from '@/stores/useOrganisationStore'
-import type { BillingStatus, InviteMemberPayload, UpdateAdminOrganisationPayload } from '@/types/admin'
+import type { BillingStatus, UpdateAdminOrganisationPayload } from '@/types/admin'
+import type { InviteMemberPayload, OrganisationRole } from '@/types/member'
 
 definePage({
   meta: {
@@ -166,7 +169,7 @@ function openAsOrganiser() {
 const isInviteDialogOpen = ref(false)
 const inviteForm = ref<InviteMemberPayload>({ email: '', role: 'org_member' })
 const inviteError = ref('')
-const { mutate: inviteMember, isPending: isInviting } = useInviteOrganisationMember()
+const { mutate: inviteMember, isPending: isInviting } = useInviteMember('platform', orgId)
 
 function openInviteDialog() {
   inviteForm.value = { email: '', role: 'org_member' }
@@ -177,11 +180,11 @@ function openInviteDialog() {
 function submitInvite() {
   inviteError.value = ''
   inviteMember(
-    { organisationId: orgId.value, payload: inviteForm.value },
+    inviteForm.value,
     {
-      onSuccess: (data) => {
+      onSuccess: () => {
         isInviteDialogOpen.value = false
-        showSnackbar(data.message ?? 'Uitnodiging verstuurd', 'success')
+        showSnackbar('Uitnodiging verstuurd', 'success')
       },
       onError: (err: unknown) => {
         const error = err as { response?: { data?: { message?: string } } }
@@ -194,7 +197,7 @@ function submitInvite() {
 // ─── Remove Member ─────────────────────────────────────────
 const isRemoveDialogOpen = ref(false)
 const memberToRemove = ref<{ id: string; full_name: string } | null>(null)
-const { mutate: removeMember, isPending: isRemoving } = useRemoveOrganisationMember()
+const { mutate: removeMember, isPending: isRemoving } = useRemoveMember('platform', orgId)
 
 function openRemoveDialog(member: { id: string; full_name: string }) {
   memberToRemove.value = member
@@ -203,24 +206,21 @@ function openRemoveDialog(member: { id: string; full_name: string }) {
 
 function confirmRemove() {
   if (!memberToRemove.value) return
-  removeMember(
-    { organisationId: orgId.value, userId: memberToRemove.value.id },
-    {
-      onSuccess: () => {
-        isRemoveDialogOpen.value = false
-        memberToRemove.value = null
-        showSnackbar('Lid verwijderd', 'success')
-      },
+  removeMember(memberToRemove.value.id, {
+    onSuccess: () => {
+      isRemoveDialogOpen.value = false
+      memberToRemove.value = null
+      showSnackbar('Lid verwijderd', 'success')
     },
-  )
+  })
 }
 
 // ─── Update Member Role ────────────────────────────────────
-const { mutate: updateMemberRole } = useUpdateOrganisationMemberRole()
+const { mutate: updateMemberRole } = useUpdateMemberRole('platform', orgId)
 
 function onRoleChange(userId: string, newRole: string) {
   updateMemberRole(
-    { organisationId: orgId.value, userId, payload: { role: newRole } },
+    { userId, role: newRole as OrganisationRole },
     {
       onSuccess: () => {
         showSnackbar('Rol bijgewerkt', 'success')