v1.21.8 — Fix download progress bar format crash

ETA calculation in Write-ProgressBar used {0:D2} format specifier
with a floating-point value from [math]::Ceiling(), which only
accepts integral types. Cast to [int] to fix FormatException
during file downloads.

Author: TheAbider

Changelog.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## v1.21.8
+
+- **Bug Fix:** Download progress bar crash — ETA calculation used a format specifier incompatible with floating-point values, causing "Format specifier was invalid" error during file downloads (04-Navigation).
+- 64 modules, 2291 tests
+
 ## v1.21.7
 
 - **UX:** Agent installer "NOT CONFIGURED" screen cleaned up — removed debug output, now shows a concise error message if the company defaults JSON file has syntax errors (57-AgentInstaller).

Header.ps1

@@ -30,10 +30,10 @@
     7h3 4b1d3r
 
 .VERSION
-    1.21.7
+    1.21.8
 
 .LAST UPDATED
-    03/09/2026
+    03/10/2026
 
 .CHANGELOG v1.21.1
     ROBUSTNESS, UX, CACHE CONSISTENCY:

Modules/00-Initialization.ps1

@@ -139,7 +139,7 @@ if (-not $PSCommandPath -and $script:ScriptPath) {
 if (-not $script:ModuleRoot -and $script:ScriptPath) {
     $script:ModuleRoot = [System.IO.Path]::GetDirectoryName($script:ScriptPath)
 }
-$script:ScriptVersion = "1.21.7"
+$script:ScriptVersion = "1.21.8"
 $script:ScriptStartTime = Get-Date
 
 # OS version detection (for feature compatibility)

Modules/04-Navigation.ps1

@@ -442,7 +442,7 @@ function Write-ProgressBar {
         $etaStr = ""
         if ($SpeedBytesPerSec -gt 0 -and $CurrentBytes -lt $TotalBytes) {
             $remaining = $TotalBytes - $CurrentBytes
-            $etaSec = [math]::Ceiling($remaining / $SpeedBytesPerSec)
+            $etaSec = [int][math]::Ceiling($remaining / $SpeedBytesPerSec)
             $etaMin = [math]::Floor($etaSec / 60)
             $etaSecRem = $etaSec % 60
             $etaStr = "  ETA ${etaMin}m $("{0:D2}" -f $etaSecRem)s"

RackStack.ps1

@@ -13,7 +13,7 @@
     Environment-specific settings are configured via defaults.json.
 
 .VERSION
-    1.21.7
+    1.21.8
 
 .NOTES
     - Requires Windows Server 2012 R2 or later (or Windows 10/11 for testing)

Tests/Run-Tests.ps1

@@ -1,6 +1,6 @@
 <#
 .SYNOPSIS
-    Automated Test Runner for RackStack v1.21.7
+    Automated Test Runner for RackStack v1.21.8
 
 .DESCRIPTION
     Comprehensive non-interactive test suite covering: