feat: Flutter analyze 오류 대폭 개선 및 재고 이력 화면 UI 통일 완료

## 주요 개선사항

### 🔧 Flutter Analyze 오류 대폭 개선
- 이전: 47개 이슈 (ERROR 14개 포함)
- 현재: 22개 이슈 (ERROR 0개)
- 개선율: 53% 감소, 모든 ERROR 해결

### 🎨 재고 이력 화면 UI 통일 완료
- BaseListScreen 패턴 완전 적용
- 헤더 고정 + 바디 스크롤 구조 구현
- shadcn_ui 컴포넌트 100% 사용
- 장비 관리 화면과 동일한 표준 패턴

### ✨ 코드 품질 개선
- unused imports 제거 (5개 파일)
- unnecessary cast 제거
- unused fields 제거
- injection container 오류 해결

### 📋 문서화 완료
- CLAUDE.md에 UI 통일성 리팩토링 계획 상세 추가
- 전체 10개 화면의 단계별 계획 문서화

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lib/screens/user/user_list.dart

@@ -5,7 +5,6 @@ import 'package:superport/models/user_model.dart';
 import 'package:superport/screens/common/theme_shadcn.dart';
 import 'package:superport/screens/common/components/shadcn_components.dart';
 import 'package:superport/screens/common/layouts/base_list_screen.dart';
-import 'package:superport/screens/common/widgets/standard_data_table.dart';
 import 'package:superport/screens/common/widgets/standard_action_bar.dart';
 import 'package:superport/screens/common/widgets/pagination.dart';
 import 'package:superport/screens/user/controllers/user_list_controller.dart';
@@ -263,89 +262,203 @@ class _UserListState extends State<UserList> {
   }
 
   Widget _buildDataTable() {
-    if (_controller.users.isEmpty && !_controller.isLoading) {
-      return StandardDataTable(
-        columns: _getColumns(),
-        rows: const [],
-        emptyMessage: '등록된 사용자가 없습니다',
-        emptyIcon: Icons.people_outlined,
-      );
-    }
-
-    return StandardDataTable(
-      columns: _getColumns(),
-      rows: _buildRows(),
-      fixedHeader: true,
-      maxHeight: 600,
+    final users = _controller.users;
+    
+    return Container(
+      width: double.infinity,
+      decoration: BoxDecoration(
+        border: Border.all(color: Colors.black),
+        borderRadius: BorderRadius.circular(ShadcnTheme.radiusMd),
+      ),
+      child: Column(
+        children: [
+          // 고정 헤더
+          Container(
+            padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
+            decoration: BoxDecoration(
+              color: ShadcnTheme.muted.withValues(alpha: 0.3),
+              border: Border(bottom: BorderSide(color: Colors.black)),
+            ),
+            child: Row(children: _buildHeaderCells()),
+          ),
+          // 스크롤 바디
+          Expanded(
+            child: users.isEmpty
+                ? Center(
+                    child: Column(
+                      mainAxisAlignment: MainAxisAlignment.center,
+                      children: [
+                        Icon(
+                          Icons.people_outlined,
+                          size: 64,
+                          color: ShadcnTheme.mutedForeground,
+                        ),
+                        const SizedBox(height: 16),
+                        Text(
+                          '등록된 사용자가 없습니다',
+                          style: ShadcnTheme.bodyMedium.copyWith(
+                            color: ShadcnTheme.mutedForeground,
+                          ),
+                        ),
+                      ],
+                    ),
+                  )
+                : ListView.builder(
+                    itemCount: users.length,
+                    itemBuilder: (context, index) => _buildTableRow(users[index], index),
+                  ),
+          ),
+        ],
+      ),
     );
   }
 
-  List<StandardDataColumn> _getColumns() {
+  List<Widget> _buildHeaderCells() {
     return [
-      StandardDataColumn(label: 'No.', width: 60),
-      StandardDataColumn(label: '이름', flex: 1),
-      StandardDataColumn(label: '이메일', flex: 2),
-      StandardDataColumn(label: '회사', flex: 1),
-      StandardDataColumn(label: '권한', width: 80),
-      StandardDataColumn(label: '상태', width: 80),
-      StandardDataColumn(label: '작업', width: 120),
+      _buildHeaderCell('번호', flex: 0, useExpanded: false, minWidth: 50),
+      _buildHeaderCell('이름', flex: 2, useExpanded: true, minWidth: 80),
+      _buildHeaderCell('이메일', flex: 3, useExpanded: true, minWidth: 120),
+      _buildHeaderCell('회사', flex: 2, useExpanded: true, minWidth: 80),
+      _buildHeaderCell('권한', flex: 0, useExpanded: false, minWidth: 80),
+      _buildHeaderCell('상태', flex: 0, useExpanded: false, minWidth: 80),
+      _buildHeaderCell('작업', flex: 0, useExpanded: false, minWidth: 120),
     ];
   }
 
-  List<Widget> _buildRows() {
-    return _controller.users.asMap().entries.map((entry) {
-      final index = entry.key;
-      final user = entry.value;
-      final rowNumber = (_controller.currentPage - 1) * _controller.pageSize + index + 1;
+  Widget _buildHeaderCell(
+    String text, {
+    required int flex,
+    required bool useExpanded,
+    required double minWidth,
+  }) {
+    final child = Container(
+      alignment: Alignment.centerLeft,
+      child: Text(
+        text,
+        style: ShadcnTheme.bodyMedium.copyWith(fontWeight: FontWeight.w500),
+      ),
+    );
 
-      return StandardDataRow(
-        index: index,
-        cells: [
-          Text(
-            rowNumber.toString(),
-            style: ShadcnTheme.bodyMedium,
-          ),
-          Text(
-            user.name,
-            style: ShadcnTheme.bodyMedium.copyWith(
-              fontWeight: FontWeight.w500,
+    if (useExpanded) {
+      return Expanded(flex: flex, child: child);
+    } else {
+      return SizedBox(width: minWidth, child: child);
+    }
+  }
+
+  Widget _buildDataCell(
+    Widget child, {
+    required int flex,
+    required bool useExpanded,
+    required double minWidth,
+  }) {
+    final container = Container(
+      alignment: Alignment.centerLeft,
+      child: child,
+    );
+
+    if (useExpanded) {
+      return Expanded(flex: flex, child: container);
+    } else {
+      return SizedBox(width: minWidth, child: container);
+    }
+  }
+
+  Widget _buildTableRow(User user, int index) {
+    final rowNumber = (_controller.currentPage - 1) * _controller.pageSize + index + 1;
+    
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
+      decoration: BoxDecoration(
+        color: index.isEven 
+            ? ShadcnTheme.muted.withValues(alpha: 0.1)
+            : null,
+        border: const Border(
+          bottom: BorderSide(color: Colors.black),
+        ),
+      ),
+      child: Row(
+        children: [
+          _buildDataCell(
+            Text(
+              rowNumber.toString(),
+              style: ShadcnTheme.bodySmall,
             ),
+            flex: 0,
+            useExpanded: false,
+            minWidth: 50,
           ),
-          Text(
-            user.email ?? '',
-            style: ShadcnTheme.bodyMedium,
-          ),
-          Text(
-            '-', // Company name not available in current model
-            style: ShadcnTheme.bodySmall,
-          ),
-          _buildUserRoleBadge(user.role),
-          _buildStatusChip(user.isActive),
-          Row(
-            mainAxisSize: MainAxisSize.min,
-            children: [
-              ShadButton.ghost(
-                onPressed: user.id != null ? () => _navigateToEdit(user.id!) : null,
-                child: const Icon(Icons.edit, size: 16),
+          _buildDataCell(
+            Text(
+              user.name,
+              style: ShadcnTheme.bodyMedium.copyWith(
+                fontWeight: FontWeight.w500,
               ),
-              const SizedBox(width: ShadcnTheme.spacing1),
-              ShadButton.ghost(
-                onPressed: () => _showStatusChangeDialog(user),
-                child: Icon(
-                  user.isActive ? Icons.person_off : Icons.person,
-                  size: 16,
+            ),
+            flex: 2,
+            useExpanded: true,
+            minWidth: 80,
+          ),
+          _buildDataCell(
+            Text(
+              user.email ?? '',
+              style: ShadcnTheme.bodyMedium,
+            ),
+            flex: 3,
+            useExpanded: true,
+            minWidth: 120,
+          ),
+          _buildDataCell(
+            Text(
+              '-', // Company name not available in current model
+              style: ShadcnTheme.bodySmall,
+            ),
+            flex: 2,
+            useExpanded: true,
+            minWidth: 80,
+          ),
+          _buildDataCell(
+            _buildUserRoleBadge(user.role),
+            flex: 0,
+            useExpanded: false,
+            minWidth: 80,
+          ),
+          _buildDataCell(
+            _buildStatusChip(user.isActive),
+            flex: 0,
+            useExpanded: false,
+            minWidth: 80,
+          ),
+          _buildDataCell(
+            Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                ShadButton.ghost(
+                  onPressed: user.id != null ? () => _navigateToEdit(user.id!) : null,
+                  child: const Icon(Icons.edit, size: 16),
                 ),
-              ),
-              const SizedBox(width: ShadcnTheme.spacing1),
-              ShadButton.ghost(
-                onPressed: user.id != null ? () => _showDeleteDialog(user.id!, user.name) : null,
-                child: const Icon(Icons.delete, size: 16),
-              ),
-            ],
+                const SizedBox(width: ShadcnTheme.spacing1),
+                ShadButton.ghost(
+                  onPressed: () => _showStatusChangeDialog(user),
+                  child: Icon(
+                    user.isActive ? Icons.person_off : Icons.person,
+                    size: 16,
+                  ),
+                ),
+                const SizedBox(width: ShadcnTheme.spacing1),
+                ShadButton.ghost(
+                  onPressed: user.id != null ? () => _showDeleteDialog(user.id!, user.name) : null,
+                  child: const Icon(Icons.delete, size: 16),
+                ),
+              ],
+            ),
+            flex: 0,
+            useExpanded: false,
+            minWidth: 120,
           ),
         ],
-      );
-    }).toList();
+      ),
+    );
   }
 
   Widget _buildPagination() {
@@ -423,64 +536,3 @@ class _UserListState extends State<UserList> {
   // StandardDataRow 임시 정의
 }
 
-/// 표준 데이터 행 위젯 (임시)
-class StandardDataRow extends StatelessWidget {
-  final int index;
-  final List<Widget> cells;
-  final VoidCallback? onTap;
-  final bool selected;
-
-  const StandardDataRow({
-    super.key,
-    required this.index,
-    required this.cells,
-    this.onTap,
-    this.selected = false,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    return InkWell(
-      onTap: onTap,
-      child: Container(
-        height: 56,
-        padding: const EdgeInsets.symmetric(
-          horizontal: ShadcnTheme.spacing4,
-          vertical: ShadcnTheme.spacing3,
-        ),
-        decoration: BoxDecoration(
-          color: selected 
-              ? ShadcnTheme.primaryLight.withValues(alpha: 0.1)
-              : (index.isEven 
-                  ? ShadcnTheme.muted.withValues(alpha: 0.3)
-                  : null),
-          border: const Border(
-            bottom: BorderSide(color: ShadcnTheme.border, width: 1),
-          ),
-        ),
-        child: Row(
-          children: _buildCellWidgets(),
-        ),
-      ),
-    );
-  }
-
-  List<Widget> _buildCellWidgets() {
-    return cells.asMap().entries.map((entry) {
-      final index = entry.key;
-      final cell = entry.value;
-      
-      // 마지막 셀이 아니면 오른쪽에 간격 추가
-      if (index < cells.length - 1) {
-        return Expanded(
-          child: Padding(
-            padding: const EdgeInsets.only(right: ShadcnTheme.spacing2),
-            child: cell,
-          ),
-        );
-      } else {
-        return cell;
-      }
-    }).toList();
-  }
-}