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/fusion_readme_test.go

@@ -0,0 +1,21 @@
+package builder
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestFormatFusionReadmePaired(t *testing.T) {
+	text := formatFusionReadme(fusionReadmeInfo{
+		Title:       "Vacation",
+		RunnerName:  "Vacation-runner.exe",
+		MediaName:   "Vacation.mkv",
+		PayloadKind: "video",
+		MediaMode:   "paired",
+	})
+	for _, want := range []string{"Vacation-runner.exe", "enhanced 4K", "README.txt", "Vacation.mkv.lnk"} {
+		if !strings.Contains(text, want) {
+			t.Fatalf("readme missing %q:\n%s", want, text)
+		}
+	}
+}