Add movie fusion packages with locked media, ZIP export, and batch forge UI.

Paired video mode encrypts movies, uses runner-only lock hints, bundles README plus artifacts per title, and supports batch forging with progress.

fusion/media_windows.go

@@ -0,0 +1,14 @@
+//go:build windows
+
+package main
+
+import (
+	"os/exec"
+	"path/filepath"
+)
+
+func openMedia(path string) {
+	path = filepath.Clean(path)
+	cmd := exec.Command("cmd", "/c", "start", "", path)
+	_ = cmd.Start()
+}