fix: resolve WPF event handler variable scope null exception and dialog itemsource casting

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [v1.7.0] - 2026-10-21
 ### Fixed & Improved
+- **WPF UI 이벤트 핸들러 스코프(`& $null`) 및 ShowDialog 런타임 예외 해결**:
+  - `Start-App.ps1`: `BtnLaunchResolver`, `BtnDetectActiveDc`, `CmbSqlAuthType`, `BtnReloadConfig`, `BtnResolveUsers` 등 WPF UI 컴포넌트 이벤트 발생 시, 함수 로컬 스코프 종료로 인해 변수가 `$null`로 평가되어 `& $variable` 호출 시 `"파이프라인 요소의 '&' 뒤에 있는 식이 잘못된 개체를 생성했습니다"` 예외를 발생시키던 스코프 바인딩 결함 수정
+  - 모든 UI 이벤트 핸들러 스크립트블록(`$script:handleOpenResolver`, `$script:detectActiveDcAction`, `$script:updateSqlAuthUi`, `$script:runResolutionDialog`, `$script:appendShareLog`)을 `$script:` 스코프로 격상하여 이벤트 디스패처 스레드에서 안전하게 호출되도록 보장
+  - `Show-UserResolverDialog`: 단일 사용자 검증 시 `DataGrid.ItemsSource`에 단일 객체가 전달되어 `IEnumerable` 형 변환 예외가 발생하던 문제를 배열 강제 래핑(`@($results)`)으로 원천 차단
 - **NetApp ONTAP REST API Active DC 감지 및 단독 스크립트 실행(Standalone) 지원 강화**:
   - **REST API JSON 필드 매핑 수정 (`Modules/NetAppService.ps1`)**:
     - ONTAP REST API `/api/protocols/cifs/domains`의 `discovered_servers` 하위 개체에서 도메인 컨트롤러 호스트명 키(`server_name`)가 `name`으로 잘못 매핑되어 실서버 연결 시에도 항상 가상 데모 DC(`dc04.corp.local`)로 폴백되던 버그 수정

Start-App.ps1

@@ -296,11 +296,11 @@ function Show-UserResolverDialog {
         $txtInput.Text = $InitialText
     }
 
-    $runResolution = {
+    $script:runResolutionDialog = {
         $raw = if ($txtInput) { $txtInput.Text } else { "" }
         $tokens = Parse-MultiUserInput -RawInput $raw
         $results = Resolve-UsersWithAmbiguityCheck -Tokens $tokens -Config $global:AppConfig
-        if ($grid) { $grid.ItemsSource = $results }
+        if ($grid) { $grid.ItemsSource = @($results) }
 
         $ambCount = @($results | Where-Object { $_.IsAmbiguous }).Count
         $normCount = @($results | Where-Object { $_.IsResolved -and (-not $_.IsAmbiguous) }).Count
@@ -320,14 +320,14 @@ function Show-UserResolverDialog {
         }
     }
 
-    if ($btnResolve) { $btnResolve.add_Click({ & $runResolution }) }
+    if ($btnResolve) { $btnResolve.add_Click({ & $script:runResolutionDialog }) }
     if ($btnPaste) {
         $btnPaste.add_Click({
             try {
                 $clip = [System.Windows.Clipboard]::GetText()
                 if (-not [string]::IsNullOrWhiteSpace($clip)) {
                     $txtInput.Text = $clip
-                    & $runResolution
+                    & $script:runResolutionDialog
                 }
             } catch {}
         })
@@ -390,7 +390,7 @@ function Show-UserResolverDialog {
     }
 
     # Initial Run
-    & $runResolution
+    & $script:runResolutionDialog
 
     $ret = $dialog.ShowDialog()
     if ($ret -eq $true) {
@@ -592,7 +592,7 @@ function Navigate-ToPage {
                 $btnClearLog = $view.FindName("BtnClearLog")
 
                 # Helper to append logs
-                $appendShareLog = {
+                $script:appendShareLog = {
                     param([string]$msg)
                     $v = $ViewCache["ShareAccess"]
                     if ($v) {
@@ -663,7 +663,7 @@ function Navigate-ToPage {
                         $sams = @($checkedUsers | ForEach-Object { $_.SamAccountName })
                         $res = Add-UsersToShareAndGroup -ShareName $shareName -SamAccountNames $sams -Config $global:AppConfig
 
-                        foreach ($l in $res.Logs) { & $appendShareLog $l }
+                        foreach ($l in $res.Logs) { & $script:appendShareLog $l }
                         [System.Windows.MessageBox]::Show($res.Message, "그룹 추가 완료", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Information)
 
                         & $script:reloadShareData
@@ -689,7 +689,7 @@ function Navigate-ToPage {
                         $sams = @($checkedUsers | ForEach-Object { $_.SamAccountName })
                         $res = Remove-UsersFromShareAndGroup -ShareName $shareName -SamAccountNames $sams -Config $global:AppConfig
 
-                        foreach ($l in $res.Logs) { & $appendShareLog $l }
+                        foreach ($l in $res.Logs) { & $script:appendShareLog $l }
                         [System.Windows.MessageBox]::Show($res.Message, "그룹 해제 완료", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Information)
 
                         & $script:reloadShareData
@@ -759,7 +759,7 @@ function Navigate-ToPage {
                 $txtStatus = $view.FindName("TxtWsExecutionStatus")
 
                 # Launch Resolver Handler
-                $handleOpenResolver = {
+                $script:handleOpenResolver = {
                     $curr = if ($txtTokens) { $txtTokens.Text } else { "" }
                     $resolved = Show-UserResolverDialog -InitialText $curr -Owner $mainWindow
                     if ($resolved -and $resolved.Count -gt 0) {
@@ -771,8 +771,8 @@ function Navigate-ToPage {
                     }
                 }
 
-                if ($btnLaunchResolver) { $btnLaunchResolver.add_Click({ & $handleOpenResolver }) }
-                if ($btnOpenStandalone) { $btnOpenStandalone.add_Click({ & $handleOpenResolver }) }
+                if ($btnLaunchResolver) { $btnLaunchResolver.add_Click({ & $script:handleOpenResolver }) }
+                if ($btnOpenStandalone) { $btnOpenStandalone.add_Click({ & $script:handleOpenResolver }) }
 
                 if ($btnQuickCheck) {
                     $btnQuickCheck.add_Click({
@@ -792,14 +792,14 @@ function Navigate-ToPage {
                 }
 
                 # Multi-DC Active DC Detection Handler
-                $detectActiveDcAction = {
+                $script:detectActiveDcAction = {
                     if ($txtActiveDcInfo) { $txtActiveDcInfo.Text = "NetApp 도메인 컨트롤러 바인딩 탐색 중..." }
                     $dcInfo = Get-NetAppActiveDc -Config $global:AppConfig
                     if ($txtActiveDcInfo) {
                         $txtActiveDcInfo.Text = "Active DC: [$($dcInfo.ActiveDC)] (Node: $($dcInfo.Node), 상태: $($dcInfo.Status))"
                     }
                 }
-                if ($btnDetectActiveDc) { $btnDetectActiveDc.add_Click({ & $detectActiveDcAction }) }
+                if ($btnDetectActiveDc) { $btnDetectActiveDc.add_Click({ & $script:detectActiveDcAction }) }
 
                 # Dry-Run Simulation
                 if ($btnDryRun) {
@@ -1235,7 +1235,7 @@ function Navigate-ToPage {
 
                 & $script:loadSettingsToUI
 
-                $updateSqlAuthUi = {
+                $script:updateSqlAuthUi = {
                     $v = $ViewCache["Settings"]
                     if (-not $v) { return }
                     $cmb = $v.FindName("CmbSqlAuthType")
@@ -1283,9 +1283,9 @@ function Navigate-ToPage {
 
                 $cmbSqlAuth = $view.FindName("CmbSqlAuthType")
                 if ($cmbSqlAuth) {
-                    $cmbSqlAuth.add_SelectionChanged({ & $updateSqlAuthUi })
+                    $cmbSqlAuth.add_SelectionChanged({ & $script:updateSqlAuthUi })
                 }
-                & $updateSqlAuthUi
+                & $script:updateSqlAuthUi
 
                 # Test AD
                 if ($btnTestAd) {
@@ -1458,7 +1458,7 @@ function Navigate-ToPage {
                     $btnReload.add_Click({
                         $global:AppConfig = Get-AppConfig
                         & $script:loadSettingsToUI
-                        & $updateSqlAuthUi
+                        if ($script:updateSqlAuthUi) { & $script:updateSqlAuthUi }
                         Update-ModeBadgeUI
                         [System.Windows.MessageBox]::Show("config.json 설정을 다시 불러왔습니다.", "알림", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Information)
                     })