Fix installer: use if-not fallbacks so iex piping works (param defaults don't apply via iex)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public_html/agent/install-windows.ps1

@@ -10,11 +10,16 @@
 #   irm https://jarvis.orbishosting.com/agent/install-windows.ps1 | iex
 
 param(
-    [string]$JarvisUrl = "https://jarvis.orbishosting.com",
-    [string]$Key       = "f846a9aaf7ce9a61742c63c87c4186052a71d2a580c65518",
-    [string]$AgentName = $env:COMPUTERNAME.ToLower()
+    [string]$JarvisUrl = "",
+    [string]$Key       = "",
+    [string]$AgentName = ""
 )
 
+# param() defaults don't apply when piped through iex — set here as fallback
+if (-not $JarvisUrl) { $JarvisUrl = "https://jarvis.orbishosting.com" }
+if (-not $Key)       { $Key       = "f846a9aaf7ce9a61742c63c87c4186052a71d2a580c65518" }
+if (-not $AgentName) { $AgentName = $env:COMPUTERNAME.ToLower() }
+
 $ErrorActionPreference = "Stop"
 $InstallDir  = "C:\ProgramData\jarvis-agent"
 $AgentScript = "$InstallDir\jarvis-agent-windows.py"