feat(client-archive): bulk-archive wizard with per-high-stakes confirmation

Replaces the single window.confirm() with a 3-stage wizard:
- preflight: counts auto/needs-reason/blocked (POST /bulk-archive-preflight)
- reasons: carousel through high-stakes clients capturing per-client
  reason (≥5 chars) — bulk endpoint accepts reasonsByClientId map
- confirm: shows the final archivable count and submits

Low-stakes still auto-archives with safe defaults; blocked clients
are skipped with a per-row reason in the preflight summary.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/clients/client-list.tsx

@@ -16,6 +16,7 @@ import { ArchiveConfirmDialog } from '@/components/shared/archive-confirm-dialog
 import { PermissionGate } from '@/components/shared/permission-gate';
 import { TagPicker } from '@/components/shared/tag-picker';
 import { BulkHardDeleteDialog } from '@/components/clients/bulk-hard-delete-dialog';
+import { BulkArchiveWizard } from '@/components/clients/bulk-archive-wizard';
 import { usePermissions } from '@/hooks/use-permissions';
 import {
   Dialog,
@@ -46,6 +47,7 @@ export function ClientList() {
   );
   const [tagChoice, setTagChoice] = useState<string[]>([]);
   const [bulkDeleteIds, setBulkDeleteIds] = useState<string[]>([]);
+  const [bulkArchiveIds, setBulkArchiveIds] = useState<string[]>([]);
 
   const { can } = usePermissions();
   const canHardDelete = can('admin', 'permanently_delete_clients');
@@ -183,14 +185,7 @@ export function ClientList() {
               variant: 'destructive',
               onClick: (ids) => {
                 if (ids.length === 0) return;
-                if (
-                  !window.confirm(
-                    `Archive ${ids.length} client${ids.length === 1 ? '' : 's'}? This can be undone from the archived list.`,
-                  )
-                ) {
-                  return;
-                }
-                bulkMutation.mutate({ action: 'archive', ids });
+                setBulkArchiveIds(ids);
               },
             },
             ...(canHardDelete
@@ -298,6 +293,13 @@ export function ClientList() {
         clientIds={bulkDeleteIds}
         onDeleted={() => setBulkDeleteIds([])}
       />
+
+      <BulkArchiveWizard
+        open={bulkArchiveIds.length > 0}
+        onOpenChange={(open) => !open && setBulkArchiveIds([])}
+        clientIds={bulkArchiveIds}
+        onSuccess={() => setBulkArchiveIds([])}
+      />
     </div>
   );
 }