Same overlay look, with fixed poster URL handoff. If a poster file is selected and the URL is empty, Submit auto-uploads it before creating the submission.
Creator fills in title, description, public video URL and optional poster.
Upload fills the URL box and shows a visible uploaded link confirmation.
Creates pending `sb_submissions` only. No `sb_movies` publish.
No API keys, secret links, private dashboards or credentials.
Poster upload goes to existing Supabase Storage bucket.
If a file is selected and URL is blank, Submit uploads first.
This page never writes directly to `sb_movies`.
Complete the form. This creates a pending `sb_submissions` row only.
Submit result will appear here.