refactor: remove automatic service/task installation from Linux, macOS, and Windows setup scripts.

scripts/setup-windows.ps1

@@ -1,6 +1,5 @@
 # ZeroGravity — Windows setup
-# Creates config directories, builds the release binary, and optionally
-# installs as a scheduled task for automatic startup.
+# Creates config directories, checks prerequisites, and builds the release binary.
 # Run as: powershell -ExecutionPolicy Bypass -File scripts\setup-windows.ps1
 
 $ErrorActionPreference = "Stop"
@@ -51,37 +50,6 @@ if (-not (Test-Path $Binary)) {
 }
 Write-Host "  Built: $Binary"
 
-# ── 5. Scheduled task (optional) ──
-$TaskName = "ZeroGravity Proxy"
-$Existing = Get-ScheduledTask -TaskName $TaskName -ErrorAction SilentlyContinue
-
-if ($Existing) {
-    Write-Host "→ Scheduled task '$TaskName' already exists. Updating…"
-    Unregister-ScheduledTask -TaskName $TaskName -Confirm:$false
-}
-
-Write-Host "→ Creating scheduled task '$TaskName'…"
-$Action = New-ScheduledTaskAction `
-    -Execute $Binary `
-    -WorkingDirectory $ProjectDir
-
-$Trigger = New-ScheduledTaskTrigger -AtLogOn
-$Settings = New-ScheduledTaskSettingsSet `
-    -AllowStartIfOnBatteries `
-    -DontStopIfGoingOnBatteries `
-    -RestartCount 3 `
-    -RestartInterval (New-TimeSpan -Minutes 1)
-
-Register-ScheduledTask `
-    -TaskName $TaskName `
-    -Action $Action `
-    -Trigger $Trigger `
-    -Settings $Settings `
-    -Description "ZeroGravity OpenAI-compatible proxy" | Out-Null
-
-Write-Host "  Installed as logon task."
 Write-Host ""
 Write-Host "✓ Setup complete."
-Write-Host "  Start now:  schtasks /run /tn '$TaskName'"
-Write-Host "  Stop:       schtasks /end /tn '$TaskName'"
-Write-Host "  Or manually: .\target\release\zerogravity.exe"
+Write-Host "  Start: .\target\release\zerogravity.exe"