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.

lib/constants.ts

@@ -1,10 +1,12 @@
 export const FREE_PLAN = {
-  monthlyQuota: 14,
+  monthlyQuota: 10,
   maxFileSizeBytes: 30 * 1024 * 1024,
-  watermarkRequired: true,
+  maxBatchSize: 3,
+  watermarkOptional: true,
 } as const;
 
 export const RESOLUTIONS = [
+  { value: "1920x1080", label: "1920x1080 (16:9)", width: 1920, height: 1080 },
   { value: "1280x720", label: "1280x720 (16:9)", width: 1280, height: 720 },
   { value: "854x480", label: "854x480 (16:9)", width: 854, height: 480 },
   { value: "720x720", label: "720x720 (1:1)", width: 720, height: 720 },