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/data/repositories/auth_repository_impl.dart

@@ -1,6 +1,7 @@
 import 'package:dartz/dartz.dart';
 import 'package:injectable/injectable.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import '../../core/errors/failures.dart';
 import '../../domain/repositories/auth_repository.dart';
 import '../datasources/remote/auth_remote_datasource.dart';
@@ -17,6 +18,7 @@ import '../models/auth/token_response.dart';
 class AuthRepositoryImpl implements AuthRepository {
   final AuthRemoteDataSource remoteDataSource;
   final SharedPreferences sharedPreferences;
+  final FlutterSecureStorage secureStorage;
   
   // SharedPreferences 키 상수
   static const String _keyAccessToken = 'access_token';
@@ -26,6 +28,7 @@ class AuthRepositoryImpl implements AuthRepository {
   AuthRepositoryImpl({
     required this.remoteDataSource,
     required this.sharedPreferences,
+    required this.secureStorage,
   });
 
   @override
@@ -36,7 +39,7 @@ class AuthRepositoryImpl implements AuthRepository {
       return result.fold(
         (failure) => Left(failure),
         (loginResponse) async {
-          // 로그인 성공 시 토큰과 사용자 정보를 로컬에 저장
+          // 로그인 성공 시 토큰과 사용자 정보를 로컬에 저장 (보안 저장소)
           await _saveTokens(loginResponse.accessToken, loginResponse.refreshToken);
           await _saveUserData(loginResponse.user);
           
@@ -93,7 +96,7 @@ class AuthRepositoryImpl implements AuthRepository {
       return result.fold(
         (failure) => Left(failure),
         (tokenResponse) async {
-          // 새 토큰 저장
+          // 새 토큰 저장 (보안 저장소)
           await _saveTokens(tokenResponse.accessToken, tokenResponse.refreshToken);
           return Right(tokenResponse);
         },
@@ -219,10 +222,10 @@ class AuthRepositoryImpl implements AuthRepository {
 
   // Private 헬퍼 메서드들
   
-  /// 액세스 토큰과 리프레시 토큰을 로컬에 저장
+  /// 액세스 토큰과 리프레시 토큰을 로컬에 저장 (보안 저장소 사용)
   Future<void> _saveTokens(String accessToken, String refreshToken) async {
-    await sharedPreferences.setString(_keyAccessToken, accessToken);
-    await sharedPreferences.setString(_keyRefreshToken, refreshToken);
+    await secureStorage.write(key: _keyAccessToken, value: accessToken);
+    await secureStorage.write(key: _keyRefreshToken, value: refreshToken);
   }
   
   /// 사용자 데이터를 로컬에 저장
@@ -231,20 +234,22 @@ class AuthRepositoryImpl implements AuthRepository {
     await sharedPreferences.setString(_keyUserData, user.toJson().toString());
   }
   
-  /// 액세스 토큰 조회
+  /// 액세스 토큰 조회 (보안 저장소)
   Future<String?> _getAccessToken() async {
-    return sharedPreferences.getString(_keyAccessToken);
+    return await secureStorage.read(key: _keyAccessToken);
   }
   
-  /// 리프레시 토큰 조회
+  /// 리프레시 토큰 조회 (보안 저장소)
   Future<String?> _getRefreshToken() async {
-    return sharedPreferences.getString(_keyRefreshToken);
+    return await secureStorage.read(key: _keyRefreshToken);
   }
   
-  /// 로컬 데이터 전체 삭제
+  /// 로컬 데이터 전체 삭제 (토큰은 보안 저장소에서 삭제)
   Future<void> _clearLocalData() async {
-    await sharedPreferences.remove(_keyAccessToken);
-    await sharedPreferences.remove(_keyRefreshToken);
+    // 토큰 삭제
+    await secureStorage.delete(key: _keyAccessToken);
+    await secureStorage.delete(key: _keyRefreshToken);
+    // 사용자 데이터는 SharedPreferences에 저장되어 있으므로 제거
     await sharedPreferences.remove(_keyUserData);
   }
 }