[BUG] Claude Pro Gift subscription auto-canceled after 7 days — Stripe proration issue (related to #44163, #41499)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

My Claude Pro Gift subscription (Invoice F6PAUVTX-0001) was redeemed on April 6, 2026 and should be valid until May 6, 2026. After 7 days, on April 13, my account was automatically downgraded to Free plan with no notification.

• Invoice shows: $0.00 Paid, period April 6 – May 6, 2026
• Settings > Billing shows: Free plan, only "Upgrade plan" button (no "Resubscribe")
• This appears to be the same Stripe proration bug reported in #44163 and #41499, where gift subscriptions using 100% off coupons get auto-canceled

Fin AI Agent support loop was unable to resolve this and refused to escalate to a human agent.

<img width="1332" height="913" alt="Image" src="https://github.com/user-attachments/assets/5a0d9d4b-242f-4d2e-8bc5-028972bd6cc2" />

What Should Happen?

Gift Pro subscription should remain active for the full duration (until May 6, 2026). Account should show Pro plan, not Free.

Error Messages/Logs

Steps to Reproduce

1. Redeem a Claude Pro Gift subscription on claude.ai
2. Use Pro features normally for several days
3. After ~7 days, check Settings > Billing
4. Account shows Free plan despite gift being valid for 1 month

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

April 6-13, 2026 (web, not Claude Code)

Claude Code Version

N/A - billing issue on claude.ai web

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

<img width="1332" height="913" alt="Image" src="https://github.com/user-attachments/assets/29ce9729-f012-4f2c-bbae-59cef00bc09c" />