[Feature] Profile UI amendments — cosmetics, subscription status, stats

## Overview
Profile page needs to surface new monetisation features: subscription status, equipped cosmetics, season pass progress, verified badge, name colour.

## Scope
- Subscription tier badge and status
- Equipped cosmetics display with edit option
- Battle Pass season progress
- Verified badge display
- Custom name colour preview

## Acceptance criteria
- [ ] Subscription status visible on profile
- [ ] Equipped cosmetics shown with edit option
- [ ] Battle Pass progress bar visible
- [ ] Verified badge shown where applicable
- [ ] All elements mobile-responsive

## Dependencies
- **Depends on:** Subscription tiers, Battle Pass, OAuth