added support for username variable for logging

scripts/Start-OBSReplayBuffer.ps1

@@ -17,7 +17,7 @@ $config     = Import-PowerShellDataFile -Path $configPath
 
 # --- Start transcript logging ---
 try {
-    $logDir = Join-Path $config.LogPath $env:USERNAME
+    $logDir = [System.Environment]::ExpandEnvironmentVariables($config.LogPath)
     New-Item -ItemType Directory -Path $logDir -Force -ErrorAction SilentlyContinue | Out-Null
     Start-Transcript -Path (Join-Path $logDir 'OBSReplayBuffer.log') -Append -ErrorAction Stop
 } catch {
@@ -69,6 +69,7 @@ Write-Host "$(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') [INFO] Detected resolution
 $obsConfigRoot = "$env:APPDATA\obs-studio"
 $sourceConfig  = Join-Path $PSScriptRoot '..\obs-config'
 
+New-Item -ItemType Directory -Path $obsConfigRoot -Force | Out-Null
 Copy-Item -Path "$sourceConfig\global.ini" -Destination "$obsConfigRoot\global.ini" -Force
 
 $wsConfigDir = "$obsConfigRoot\plugin_config\obs-websocket"