[Feature] Battle Pass system — 6-week seasons, free and paid tiers

[iiamlewis]

Overview

6-week season Battle Pass with free and paid tiers. Subscription gives free access to the paid tier. Unique items per season, only earnable through the pass — never restocked.

Scope

• Season structure: 6-week cycles
• Free tier: available to all players, limited rewards
• Paid tier: purchasable or included with subscription
• Season-exclusive cosmetics — flags, patterns, effects
• Progress tracked per player per season
• Season end: unclaimed rewards expire, pass closes permanently

Acceptance criteria

• Season timer visible in UI
• Free and paid tier tracks clearly differentiated
• Progress visible on player profile / HUD
• Subscription holders automatically granted paid tier access
• Season cosmetics marked as season-exclusive and never restocked
• Previous seasons archived and visible but not purchasable

Dependencies

• Depends on: Subscription tiers, OAuth