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/common/layouts/base_list_screen.dart

@@ -16,6 +16,8 @@ class BaseListScreen extends StatelessWidget {
   final VoidCallback? onRefresh;
   final String emptyMessage;
   final IconData emptyIcon;
+  // 데이터 테이블 영역 좌우 패딩(기본: spacing6). 화면별로 전체폭 사용이 필요할 경우 0으로 설정.
+  final EdgeInsetsGeometry dataAreaPadding;
 
   const BaseListScreen({
     super.key,
@@ -30,6 +32,8 @@ class BaseListScreen extends StatelessWidget {
     this.onRefresh,
     this.emptyMessage = '데이터가 없습니다',
     this.emptyIcon = Icons.inbox_outlined,
+    // 기본값을 0으로 설정해 테이블 영역이 가용 폭을 모두 사용하도록 함
+    this.dataAreaPadding = EdgeInsets.zero,
   });
 
   @override
@@ -78,7 +82,7 @@ class BaseListScreen extends StatelessWidget {
           // 데이터 테이블 - 헤더 고정, 바디만 스크롤
           Expanded(
             child: Padding(
-              padding: const EdgeInsets.symmetric(horizontal: ShadcnTheme.spacing6),
+              padding: dataAreaPadding,
               child: dataTable,
             ),
           ),
@@ -125,7 +129,7 @@ class BaseListScreen extends StatelessWidget {
               onPressed: onRefresh,
               style: ElevatedButton.styleFrom(
                 backgroundColor: ShadcnTheme.primary,
-                foregroundColor: Colors.white,
+                foregroundColor: ShadcnTheme.primaryForeground,
                 shape: RoundedRectangleBorder(
                   borderRadius: BorderRadius.circular(ShadcnTheme.radiusMd),
                 ),
@@ -153,4 +157,4 @@ class BaseListScreen extends StatelessWidget {
       ),
     );
   }
-}
+}