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.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/api/account/api-key/route.ts

@@ -0,0 +1,49 @@
+import { NextResponse } from "next/server";
+import { createUserApiKey, getUserApiKeyStatus, revokeUserApiKey } from "@/lib/api-keys";
+import { hasProFeatures } from "@/lib/edition";
+import { getSessionUser } from "@/lib/session";
+
+async function requireApiKeyAccess() {
+  const user = await getSessionUser();
+  if (!user) {
+    return { error: NextResponse.json({ error: "Unauthorized" }, { status: 401 }), user: null };
+  }
+  if (!hasProFeatures(user.plan)) {
+    return {
+      error: NextResponse.json(
+        { error: "API keys are available on the Pro plan only" },
+        { status: 403 },
+      ),
+      user: null,
+    };
+  }
+  return { error: null, user };
+}
+
+export async function GET() {
+  const { error, user } = await requireApiKeyAccess();
+  if (error || !user) return error!;
+
+  const status = await getUserApiKeyStatus(user.id);
+  return NextResponse.json(status);
+}
+
+export async function POST() {
+  const { error, user } = await requireApiKeyAccess();
+  if (error || !user) return error!;
+
+  const { token, prefix } = await createUserApiKey(user.id);
+  return NextResponse.json({
+    apiKey: token,
+    prefix,
+    message: "Copy this key now. It will not be shown again.",
+  });
+}
+
+export async function DELETE() {
+  const { error, user } = await requireApiKeyAccess();
+  if (error || !user) return error!;
+
+  await revokeUserApiKey(user.id);
+  return NextResponse.json({ ok: true });
+}