feat: implement security, discovery, history, file transfer, web UI (P0-P3)

internal/notify/notify_other.go

@@ -0,0 +1,11 @@
+//go:build !linux && !darwin && !windows
+
+package notify
+
+// Notifier is a no-op on unsupported platforms.
+type notifier struct{}
+
+// New returns a no-op notifier.
+func New() Notifier { return notifier{} }
+
+func (notifier) Notify(string, string) error { return nil }