[Frontend] StreamEventType union missing FEE_COLLECTED

[ogazboiz]

Telegram: https://t.me/+DOylgFv1jyJlNzM0

Why this matters

frontend/src/lib/api-types.ts defines StreamEventType as CREATED | TOPPED_UP | WITHDRAWN | CANCELLED | COMPLETED | PAUSED | RESUMED — it omits FEE_COLLECTED, which the backend emits and stores (see prisma/schema.prisma and the /v1/events filter enum). BackendStreamEvent.eventType is consequently too narrow; a FEE_COLLECTED event from the API is not representable in the type, and exhaustive switches over event types won't account for it.

Acceptance criteria

• Add "FEE_COLLECTED" to the StreamEventType union
• typecheck passes; any switch/style maps that enumerate event types are reviewed (e.g. EVENT_STYLES in stream-detail already includes FEE_COLLECTED)

Files to touch

• frontend/src/lib/api-types.ts

Out of scope

• Backend swagger enum ([Backend] Sync swagger schemas: StreamEvent eventType enum + Stream pause fields #540).

[joannamach250-collab]

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