Initial commit: YouTube Studio Flow (backend, frontend, infrastructure, docs)

backend/prisma/migrations/20260525000001_rename_youtube_handle_to_link/migration.sql

@@ -0,0 +1,9 @@
+-- Rename youtubeHandle -> youtubeLink for consistency with other platform fields
+ALTER TABLE "Collaborator" RENAME COLUMN "youtubeHandle" TO "youtubeLink";
+
+-- Convert existing handle values (@handle or handle) to full YouTube URLs
+UPDATE "Collaborator"
+SET "youtubeLink" = 'https://www.youtube.com/@' || LTRIM("youtubeLink", '@')
+WHERE "youtubeLink" IS NOT NULL
+  AND "youtubeLink" != ''
+  AND "youtubeLink" NOT LIKE 'https://%';