feat(ui): full‑width ShadTable across app; fix rent dialog width; correct equipment pagination

- ShadTable: ensure full-width via LayoutBuilder+ConstrainedBox minWidth
- BaseListScreen: default data area padding = 0 for table edge-to-edge
- Vendor/Model/User/Company/Inventory/Zipcode: set columnSpanExtent per column
  and add final filler column to absorb remaining width; pin date/status/actions
  widths; ensure date text is single-line
- Equipment: unify card/border style; define fixed column widths + filler;
  increase checkbox column to 56px to avoid overflow
- Rent list: migrate to ShadTable.list with fixed widths + filler column
- Rent form dialog: prevent infinite width by bounding ShadProgress with
  SizedBox and remove Expanded from option rows; add safe selectedOptionBuilder
- Admin list: fix const with non-const argument in table column extents
- Services/Controller: remove hardcoded perPage=10; use BaseListController
  perPage; trust server meta (total/totalPages) in equipment pagination
- widgets/shad_table: ConstrainedBox(minWidth=viewport) so table stretches

Run: flutter analyze → 0 errors (warnings remain).

lib/screens/equipment/controllers/equipment_list_controller.dart

@@ -72,11 +72,11 @@ class EquipmentListController extends BaseListController<UnifiedEquipment> {
     required PaginationParams params,
     Map<String, dynamic>? additionalFilters,
   }) async {
-    // API 호출 (페이지 크기를 명시적으로 10개로 고정)
+    // API 호출: BaseListController에서 넘겨준 page/perPage를 그대로 전달
     final apiEquipmentDtos = await ErrorHandler.handleApiCall(
       () => _equipmentService.getEquipmentsWithStatus(
         page: params.page,
-        perPage: 10, // 🎯 장비 리스트는 항상 10개로 고정
+        perPage: params.perPage,
         status: _statusFilter != null ? 
           EquipmentStatusConverter.clientToServer(_statusFilter) : null,
         search: params.search,
@@ -598,4 +598,4 @@ class EquipmentListController extends BaseListController<UnifiedEquipment> {
       (statusItem) => statusItem,
     );
   }
-}
+}