Release 0.4.5: installer DB wizard, credential key, lean offline Setup.

Choose bundled or external PostgreSQL in the Setup wizard with connection
validation; optional NETX_CREDENTIAL_SECRET_KEY; single desktop shortcut;
faster uninstall and tray startup for offline Windows packages.

Co-authored-by: Cursor <cursoragent@cursor.com>

packaging/uninstall_prepare.ps1

@@ -0,0 +1,71 @@
+param(
+    [string]$ProgramRoot = "",
+    [string]$DataRoot = ""
+)
+
+# Fast, non-blocking uninstall prep for Inno [UninstallRun].
+# Must return within a few seconds and never kill unins000.exe / _unins.tmp.
+
+$ErrorActionPreference = "Continue"
+
+$prog = if ($ProgramRoot) { $ProgramRoot } else { "C:\Program Files\NetX" }
+$data = if ($DataRoot) { $DataRoot } else { Join-Path $env:ProgramData "NetX" }
+$prog = ($prog -replace '/', '\').TrimEnd('\')
+$data = ($data -replace '/', '\').TrimEnd('\')
+
+function Test-Protected([string]$Name, [string]$Cmd) {
+    if ($Name -match '^(unins\d*|_unins\.tmp|setup)\.exe$') { return $true }
+    if ($Cmd -match 'unins\d*\.exe|_unins\.tmp|uninstall_prepare\.ps1|uninstall_delete_data\.ps1') { return $true }
+    return $false
+}
+
+function Stop-Pid([int]$Id, [string]$Label) {
+    if ($Id -le 4 -or $Id -eq $PID) { return }
+    Write-Host "stop $Id $Label"
+    try { Stop-Process -Id $Id -Force -ErrorAction SilentlyContinue } catch {}
+}
+
+Write-Host "==> uninstall_prepare fast-stop prog=$prog"
+
+$patterns = @(
+    'netx_tray\.ps1',
+    'netx_api\.(main|worker|biz_state_worker)',
+    'start_netx_app\.ps1',
+    'stop_netx_app\.ps1',
+    'launch_shortcut\.ps1',
+    [regex]::Escape((Join-Path $prog '.venv\Scripts\python.exe')),
+    [regex]::Escape((Join-Path $prog 'postgres\pgsql\bin'))
+)
+
+Get-CimInstance Win32_Process -ErrorAction SilentlyContinue | ForEach-Object {
+    $cl = [string]$_.CommandLine
+    $name = [string]$_.Name
+    if (-not $cl) { return }
+    if (Test-Protected -Name $name -Cmd $cl) { return }
+    foreach ($pat in $patterns) {
+        if ($cl -match $pat) {
+            Stop-Pid -Id ([int]$_.ProcessId) -Label $name
+            break
+        }
+    }
+}
+
+# Best-effort postgres stop (no hang: immediate + ignore)
+$pgCtl = Join-Path $prog "postgres\pgsql\bin\pg_ctl.exe"
+$pgData = Join-Path $data "pgdata"
+if ((Test-Path $pgCtl) -and (Test-Path $pgData)) {
+    try {
+        $p = Start-Process -FilePath $pgCtl -ArgumentList @('-D', $pgData, 'stop', '-m', 'immediate') `
+            -WindowStyle Hidden -PassThru
+        if (-not $p.WaitForExit(5000)) {
+            try { Stop-Process -Id $p.Id -Force -ErrorAction SilentlyContinue } catch {}
+        }
+    } catch {}
+}
+
+try {
+    Remove-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Run" -Name "NetX" -ErrorAction SilentlyContinue
+} catch {}
+
+Write-Host "==> uninstall_prepare done"
+exit 0