Move Vercel deployment to shared maintainable account

Objective

Move the Digital Bone Box Vercel deployment from the contributor's personal Vercel account to the shared account so the project remains maintainable by the team.

Tasks

• Confirm the shared Vercel account/team and project ownership.
• Transfer or recreate the Vercel project under the shared account.
• Connect the project to oss-slu/DigitalBoneBox.
• Confirm the production branch is main.
• Confirm preview deployments are enabled for pull requests/branches.
• Verify the vercel.json deployment configuration.
• Deploy a preview and verify the app, API routes, static assets, images, search, descriptions, overlays, and quiz images.
• Deploy production from main and verify the production URL.
• Remove or revoke the personal account's deployment access when the shared deployment is confirmed.

Related work

• Related to PR #406 (Vercel deployment support).

The issue should remain open until the shared-account deployment is verified end to end.

Start by reviewing PR #406 and the repository's vercel.json deployment configuration. Coordinate with maintainers to confirm the shared Vercel team, then verify the project is connected to oss-slu/DigitalBoneBox with main as production and previews enabled. Done means preview and production deployments are tested end to end and personal deployment access is removed or revoked.