fix: correct TanStack Router search types for all navigate/Link calls

Each destination route's search must match its validateSearch shape exactly:
- Detail pages (tab-based): { tab: '...' }
- List pages with extra filters: include status, instructorId, view, categoryId etc.
- Form pages (enrollments/new, repairs/new): include only their specific fields
- use-pagination.ts: fix search reducer to use (prev: any) instead of invalid cast

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

packages/admin/src/routes/_authenticated/lessons/sessions/$sessionId.tsx

@@ -126,7 +126,7 @@ function SessionDetailPage() {
   return (
     <div className="space-y-6 max-w-3xl">
       <div className="flex items-center gap-3">
-        <Button variant="ghost" size="sm" onClick={() => navigate({ to: '/lessons/sessions', search: { page: 1, limit: 25, q: undefined, sort: undefined, order: 'asc' as const } })}>
+        <Button variant="ghost" size="sm" onClick={() => navigate({ to: '/lessons/sessions', search: { view: 'list' as const, page: 1, limit: 25, q: undefined, sort: undefined, order: 'desc' as const, status: undefined, instructorId: undefined } })}>
           <ArrowLeft className="h-4 w-4" />
         </Button>
         <div className="flex-1">