fix(update): discard local changes before pull on production

Prevents merge conflicts when files were manually edited on the server.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

update.ps1

@@ -56,6 +56,11 @@ if (-not $Silent) {
     $commits | ForEach-Object { Write-Host "    $_" -ForegroundColor DarkGray }
 }
 
+# Discard local changes (productia nu trebuie editata manual)
+Log "==> Discard local changes..." "Cyan"
+git checkout -- . 2>&1 | Out-Null
+git clean -fd 2>&1 | Out-Null
+
 # Git pull
 Log "==> Git pull..." "Cyan"
 $pullOutput = & git -c credential.helper="" pull $fetchUrl 2>&1