fix(dism-progress): make percent parser locale-safe and resilient

- Accept “4.9%” and “4,9%”; strip %; use integer part only
- Prevent conversion warnings; steady progress output

SRGAdminMenu.ps1

@@ -230,13 +230,11 @@ function Invoke-DismWithProgress {
     $outf = Join-Path $env:TEMP "dism_out_$ts.txt"
     $errf = Join-Path $env:TEMP "dism_err_$ts.txt"
 
-    # Ensure we get a log file too (helps debugging)
     if (-not ($Arguments -match '/LogPath:')) {
         $logFile = Join-Path $env:TEMP "dism_log_$ts.log"
         $Arguments += "/LogPath:$logFile"
     }
 
-    # Launch DISM and redirect output so we can parse percentages safely
     $p = Start-Process -FilePath dism.exe `
                        -ArgumentList ($Arguments -join ' ') `
                        -NoNewWindow `
@@ -247,18 +245,21 @@ function Invoke-DismWithProgress {
     $lastPct = -1
     while (-not $p.HasExited) {
         if (Test-Path $outf) {
-            # Read current output and grab the latest percentage like "63.8%" or "63%"
             $content = Get-Content -Path $outf -Raw -ErrorAction SilentlyContinue
             if ($content) {
-                $m = [regex]::Matches($content, '(\d{1,3}(?:\.\d+)?)%')
+                # Capture "NN", optionally followed by decimal with . or , then %
+                # Examples matched: "4.9%", "4,9 %", "62%" -> group 1 = integer part
+                $m = [regex]::Matches($content, '(\d{1,3})(?:[.,]\d+)?\s*%')
                 if ($m.Count -gt 0) {
-                    $pct = [int][math]::Min(100, [double]$m[$m.Count-1].Groups[1].Value)
+                    $pctText = $m[$m.Count-1].Groups[1].Value
+                    $pct = 0
+                    [void][int]::TryParse($pctText, [ref]$pct)
+                    if ($pct -gt 100) { $pct = 100 }
                     if ($pct -ne $lastPct) {
                         Write-Progress -Activity "DISM $($Arguments -join ' ')" -Status "$pct%" -PercentComplete $pct
                         $lastPct = $pct
                     }
                 } else {
-                    # No explicit percent yet<65>show a spinner
                     Write-Progress -Activity "DISM $($Arguments -join ' ')" -Status "Working..." -PercentComplete 0
                 }
             }
@@ -266,17 +267,13 @@ function Invoke-DismWithProgress {
         Start-Sleep -Milliseconds 400
     }
 
-    # Complete the bar cleanly
     Write-Progress -Activity "DISM $($Arguments -join ' ')" -Completed
 
     $exit = $p.ExitCode
-
-    # Show a quick summary if it failed
     if ($exit -ne 0) {
         Write-Warning "DISM exited with code $exit"
         if (Test-Path $errf) { Get-Content $errf -Tail 25 | Write-Warning }
     }
-
     return $exit
 }