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/hooks/use-pagination.ts

@@ -23,12 +23,12 @@ export function usePagination() {
 
   function setParams(updates: Partial<PaginationSearch>) {
     navigate({
-      search: ((prev: Record<string, unknown>) => ({
+      search: (prev: any) => ({
         ...prev,
         ...updates,
         // Reset to page 1 when search or sort changes
         page: updates.q !== undefined || updates.sort !== undefined ? 1 : (updates.page ?? (prev as PaginationSearch).page),
-      })) as (prev: Record<string, unknown>) => Record<string, unknown>,
+      }),
       replace: true,
     })
   }