PM-39707: feat: Display unique unpaid subscription UI

[david-livefront]

🎟️ Tracking

PM-39707

📔 Objective

This PR adds a unique UI for the Unpaid subscription state and addresses some minor UI discrepancies.

📸 Screenshots

Before	After

[github-actions]

🤖 Bitwarden Claude Code Review

Overall Assessment: APPROVE

Reviewed the addition of a dedicated Unpaid premium subscription state and the accompanying UI refinements on the Plan screen. The new UNPAID enum value is handled exhaustively across every when over PremiumSubscriptionStatus (badge colors, feature-list visibility, cancel eligibility, premium-view eligibility, description text, and the premium card state), and the JSON mapping correctly splits UNPAID out of the former UPDATE_PAYMENT bucket. Theme additions (labelLargeEmphasis typography, badge shape) are additive with single construction sites, and the test changes align with the behavioral change.

No blocking findings.

Code Review Details

No findings. The change is well-scoped:

• UNPAID follows the existing suspensionDateText ?: PLACEHOLDER_TEXT fallback pattern used by UPDATE_PAYMENT and PAST_DUE.
• All enum when branches remain exhaustive (compile-time enforced), so no status is silently unhandled.
• The split of toSubscriptionInfo maps UNPAID to UNPAID from the old combined test correctly reflects the new mapping.

[david-livefront]

Thanks @SaintPatrck