fix(zipcode): cap table width in dialog to half screen via optional maxWidthCap; pass 0.5 fraction when used in Company/Warehouse dialogs

- ZipcodeTable: add maxWidthCap and use min(viewport, cap) to compute width
- ZipcodeSearchScreen: allow tableMaxWidthFraction and forward to table
- Apply 0.5 in CompanyForm and WarehouseLocationForm dialogs

flutter analyze: 0 errors, warnings unaffected

lib/screens/company/company_form.dart

@@ -109,6 +109,7 @@ _controller = CompanyFormController(
                 GetIt.instance<ZipcodeUseCase>(),
               ),
               child: ZipcodeSearchScreen(
+                tableMaxWidthFraction: 0.5,
                 onSelect: (zipcode) {
                   Navigator.of(dialogContext).pop(zipcode);
                 },

lib/screens/warehouse_location/warehouse_location_form.dart

@@ -80,6 +80,7 @@ class _WarehouseLocationFormScreenState
                 GetIt.instance<ZipcodeUseCase>(),
               ),
               child: ZipcodeSearchScreen(
+                tableMaxWidthFraction: 0.5,
                 onSelect: (zipcode) {
                   Navigator.of(dialogContext).pop(zipcode);
                 },

lib/screens/zipcode/components/zipcode_table.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'dart:math' as math;
 import 'package:flutter/services.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 import 'package:superport/data/models/zipcode_dto.dart';
@@ -9,6 +10,8 @@ class ZipcodeTable extends StatelessWidget {
   final int totalPages;
   final Function(int) onPageChanged;
   final Function(ZipcodeDto) onSelect;
+  // Optional: cap the effective viewport width used by the table
+  final double? maxWidthCap;
 
   const ZipcodeTable({
     super.key,
@@ -17,6 +20,7 @@ class ZipcodeTable extends StatelessWidget {
     required this.totalPages,
     required this.onPageChanged,
     required this.onSelect,
+    this.maxWidthCap,
   });
 
   void _copyToClipboard(BuildContext context, String text, String label) {
@@ -43,7 +47,13 @@ class ZipcodeTable extends StatelessWidget {
               builder: (context, constraints) {
                 // 고정폭 + 마지막 filler
                 const double minW = 160 + 180 + 180 + 320 + 140 + 24;
-                final double tableW = constraints.maxWidth >= minW ? constraints.maxWidth : minW;
+                final double viewportW = constraints.maxWidth.isFinite
+                    ? constraints.maxWidth
+                    : MediaQuery.sizeOf(context).width;
+                final double cappedW = maxWidthCap != null
+                    ? math.min(viewportW, maxWidthCap!)
+                    : viewportW;
+                final double tableW = cappedW >= minW ? cappedW : minW;
                 const double etcW = 320.0;
 
                 return SingleChildScrollView(

lib/screens/zipcode/zipcode_search_screen.dart

@@ -8,7 +8,10 @@ import 'package:superport/screens/zipcode/components/zipcode_table.dart';
 
 class ZipcodeSearchScreen extends StatefulWidget {
   final Function(ZipcodeDto)? onSelect;
-  const ZipcodeSearchScreen({super.key, this.onSelect});
+  // When used in a dialog/popup, you can cap the table width
+  // by setting this fraction (0.0–1.0) of the screen width.
+  final double? tableMaxWidthFraction;
+  const ZipcodeSearchScreen({super.key, this.onSelect, this.tableMaxWidthFraction});
 
   @override
   State<ZipcodeSearchScreen> createState() => _ZipcodeSearchScreenState();
@@ -236,6 +239,9 @@ class _ZipcodeSearchScreenState extends State<ZipcodeSearchScreen> {
                                         _showSuccessToast('우편번호 ${zipcode.zipcode}를 선택했습니다');
                                       }
                                     },
+                                    maxWidthCap: widget.tableMaxWidthFraction != null
+                                        ? MediaQuery.sizeOf(context).width * widget.tableMaxWidthFraction!
+                                        : null,
                                   ),
                                 ),
                               ],