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).

test/api_integration_test.dart

@@ -1,12 +1,16 @@
 import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter/widgets.dart';
 import 'package:get_it/get_it.dart';
 import 'package:superport/injection_container.dart' as di;
 import 'package:superport/data/datasources/remote/dashboard_remote_datasource.dart';
 import 'package:superport/data/datasources/remote/lookup_remote_datasource.dart';
 import 'package:superport/core/services/lookups_service.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 void main() {
   setUpAll(() async {
+    TestWidgetsFlutterBinding.ensureInitialized();
+    SharedPreferences.setMockInitialValues({});
     await di.init();
   });
 
@@ -61,4 +65,4 @@ void main() {
       expect(result.isLeft() || result.isRight(), isTrue);
     });
   });
-}
+}