feat(qmd): warm the index and daemon from a SessionStart hook

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shared/hooks/scripts/Start-QmdWarm.ps1

@@ -0,0 +1,11 @@
+# SessionStart: warm the QMD index and daemon in the background; never blocks or fails the session.
+$ErrorActionPreference = 'SilentlyContinue'
+$script = Join-Path $HOME '.my-ai-configuration/qmd/qmd-warm.mjs'
+$node = Get-Command node -ErrorAction SilentlyContinue
+if ((Test-Path -LiteralPath $script) -and $node) {
+    $null = git rev-parse --show-toplevel 2>$null
+    if ($LASTEXITCODE -eq 0) {
+        Start-Process -FilePath $node.Source -ArgumentList @("`"$script`"") -WindowStyle Hidden -WorkingDirectory (Get-Location).Path
+    }
+}
+exit 0