# Data Model: Redesign Top Bar with Dedicated Round and Turn Fields

**Feature**: 034-topbar-redesign | **Date**: 2026-03-11

## Summary

No data model changes required. This feature is a purely presentational refactor of the `TurnNavigation` component. All data needed for the new layout already exists in the `Encounter` type:

- `encounter.roundNumber` — displayed in the round badge
- `encounter.combatants[encounter.activeIndex].name` — displayed as the centered combatant name
- `encounter.combatants.length` — used to determine the no-combatants state

## Existing Entities (no changes)

- **Encounter**: Contains `roundNumber` (number), `activeIndex` (number), and `combatants` (array). Already passed to `TurnNavigation` as a prop.
- **Combatant**: Contains `name` (string). Already accessed via `encounter.combatants[encounter.activeIndex]`.

## Component Interface (no changes)

The `TurnNavigationProps` interface remains unchanged:

```
encounter: Encounter
onAdvanceTurn: () => void
onRetreatTurn: () => void
onClearEncounter: () => void
onRollAllInitiative: () => void
onOpenSourceManager: () => void
```