feat(routes-f): channel content rating

[chinelo002]

Summary

Manage channel content rating (family, teen, mature) with viewer override.

Requirements

• GET ?creator_id returns { rating }
• PUT { creator_id, rating: family|teen|mature }
• POST /viewer-confirm { viewer_id, creator_id, accept_mature: bool }
• Track viewer mature confirmations per creator
• Tests cover set, confirm, gating

Scope Constraint - READ BEFORE STARTING

All files for this task must live inside app/api/routes-f/. This includes the route handler, helpers/utilities, types, and tests. Do NOT modify, import from, or add files to lib/, utils/, types/, components/, or anywhere else outside app/api/routes-f/. If you need shared logic, duplicate it inside your subfolder. Keeping everything scoped to this folder is intentional - it keeps these tasks independent and mergeable in any order.

Product Context

StreamFi is a blockchain-powered live streaming platform. Streamers broadcast via Mux, viewers tip in Stellar XLM/USDC, creators have stream privacy modes (public/unlisted/subscribers-only). Build these issues as practice implementations - use realistic data shapes that match the platform domain, but do not import from the real app code.

[bade2brazy]

@bade2brazy has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

assign this issue to me

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[drips-wave]

Congratulations, @bade2brazy! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

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