Align preview typography with FFmpeg output, add video/song title split, and ship OSS updates.

Separate YouTube video titles from on-video song/artist fields with Pro gating, serve curated fonts and watermark assets for 1:1 preview parity, and include billing/API/docs/deploy stack for self-hosted release.

app/api/branding/watermark/route.ts

@@ -0,0 +1,17 @@
+import fs from "fs/promises";
+import { NextResponse } from "next/server";
+import { getWatermarkPath } from "@/lib/storage";
+
+export async function GET() {
+  try {
+    const buf = await fs.readFile(getWatermarkPath());
+    return new NextResponse(buf, {
+      headers: {
+        "Content-Type": "image/png",
+        "Cache-Control": "public, max-age=86400, immutable",
+      },
+    });
+  } catch {
+    return NextResponse.json({ error: "Watermark asset not found" }, { status: 404 });
+  }
+}