page-settings-subscription-upgrade

Trigger

• User asks to improve, polish, fix, or complete route /settings/subscription.
• UI/UX hardening is requested for Subscription page.

Input Context

• Route: /settings/subscription
• Page file: src/pages/settings/subscription.tsx
• Parity: IAP-001
• Priority: P1

Read First

1. docs/status/PAGE-UPGRADE-BOARD.md
2. docs/status/SKILL-DOC-MATRIX.md
3. docs/status/PROJECT-STATUS.md
4. src/components/shared/DevMenu.tsx