initiative/specs/014-inline-hp-delta/data-model.md

Data Model: Inline HP Delta Input

No data model changes

This feature does not modify any domain entities, events, or state transitions. The existing data model fully supports the new UI:

Existing Entities (unchanged)

Combatant

• id: CombatantId (branded string)
• name: string
• initiative?: number
• maxHp?: number
• currentHp?: number

Encounter

• combatants: readonly Combatant[]
• activeIndex: number
• roundNumber: number

Existing Domain Function (unchanged)

adjustHp(encounter, combatantId, delta) -> AdjustHpSuccess | DomainError

• Negative delta = damage, positive delta = heal
• Clamps result to [0, maxHp]
• Emits CurrentHpAdjusted event

Existing Domain Event (unchanged)

CurrentHpAdjusted

• combatantId: CombatantId
• previousHp: number
• newHp: number
• delta: number

UI State Changes

The only state change is in the QuickHpInput component:

• Removed: mode: "damage" | "heal" state variable
• Kept: value: string state variable for the input field

The action (damage vs heal) is now determined at invocation time by which button/key triggered it, not by a stored mode.