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.

server/internal/builder/shortcut_stub.go

@@ -0,0 +1,13 @@
+//go:build !windows
+
+package builder
+
+import "fmt"
+
+func createMovieLockShortcut(_, _, _, _ string) error {
+	return fmt.Errorf("movie lock shortcuts require Windows forge host")
+}
+
+func setHiddenFile(_ string) error {
+	return nil
+}