feat(launcher): add 'Refresh tenant names' menu option

- Menu entry 13 re-queries Graph /organization for every saved tenant
- Updates cached TenantName values in Settings.json
- Refreshes the active tenant display in the menu header

Scripts/Start-IntuneToolkit.ps1

@@ -275,6 +275,7 @@ $commonParams = @{
 }
 
 $menuItems = @(
+    "13. Refresh tenant names"
     "12. Initialize auth (one-time setup)"
     "11. Deploy baseline (dry-run / WhatIf)"
     "10. Deploy baseline"
@@ -333,6 +334,7 @@ while($true)
         10 { $script = "Scripts/Deploy-IntuneBaseline.ps1" }
         11 { $script = "Scripts/Deploy-IntuneBaseline.ps1"; $commonParams.WhatIf = $true }
         12 { $script = "Scripts/Initialize-IntuneAuth.ps1" }
+        13 { $script = $null }
         default { continue }
     }
 
@@ -350,6 +352,38 @@ while($true)
         11 { $commonParams.WhatIf = $true }
     }
 
+    if($choiceNumber -eq 13)
+    {
+        Write-Host "`nRefreshing tenant names..." -ForegroundColor Cyan
+        $tenantsToRefresh = Get-SavedTenants -SettingsPath $settingsPath
+        $refreshed = 0
+        $failed = 0
+        foreach($t in $tenantsToRefresh)
+        {
+            Write-Host "  Resolving $($t.TenantId) ..." -ForegroundColor DarkGray -NoNewline
+            $name = Resolve-TenantName -TenantId $t.TenantId -SettingsPath $settingsPath
+            if($name)
+            {
+                Update-TenantNameCache -SettingsPath $settingsPath -TenantId $t.TenantId -TenantName $name
+                Write-Host " -> $name" -ForegroundColor Green
+                $refreshed++
+                if($t.TenantId -eq $TenantId)
+                {
+                    $currentTenant = [PSCustomObject]@{ TenantId = $TenantId; TenantName = $name; Display = "$name ($TenantId)" }
+                }
+            }
+            else
+            {
+                Write-Host " -> FAILED" -ForegroundColor Red
+                $failed++
+            }
+        }
+        Write-Host "`nRefresh complete. Success: $refreshed, Failed: $failed" -ForegroundColor Cyan
+        Write-Host "`nPress any key to return to the menu..." -ForegroundColor DarkGray
+        $null = $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
+        continue
+    }
+
     $scriptPath = Join-Path $projectRoot $script
     if(-not (Test-Path $scriptPath))
     {