Adversary creator: Attacks and Features step

[gwillish]

Third step of the adversary creator. The GM defines the adversary's attack and its special features (actions, reactions, passives).

Scope

• Attack section: attack name, range (Melee/Ranged/Melee or Ranged), damage string (free text, e.g. "1d12+2 phy")
• Features list: add/remove features; each feature has name, type (Action/Reaction/Passive), and description text
• "Back" returns to Stats step; "Next" advances to Review

Depends on

• Identity step (Adversary creator: Identity step (name, type, tier, expected stat ranges) #41) — needs adversary type context

Acceptance criteria

• Attack fields present and saved
• Features can be added, edited, and removed
• Feature type selector covers Action/Reaction/Passive
• Data carries forward to Review step