Add Block ability button (pending smart contract support)

[0x1NotMe]

Problem

The game is missing a 'Block' ability button that players need for defensive gameplay.

Current State

• No Block ability exists in the current ability system
• Warrior class has ShieldWall (defensive buff) but no dedicated Block action
• Ability enum and metadata would need to be updated once smart contract supports it

Dependencies

⚠️ This feature requires smart contract changes first before frontend implementation can begin

Proposed Implementation (once contract is ready)

1. Add Block to Ability enum in src/types/domain/enums.ts
2. Update ability metadata in src/data/abilities.ts with:
   • Name: "Block"
   • Description: "Reduce incoming damage for the next turn"
   • requiresTarget: false
3. Add ability button to the UI with appropriate icon
4. Handle cooldown and ability stages if applicable

Files to Update

• src/types/domain/enums.ts - Add Block to Ability enum
• src/data/abilities.ts - Add Block metadata
• src/components/game/controls/AbilityButton.tsx - Handle Block ability icon/styling
• Contract ABI files once updated

Acceptance Criteria

• Block ability appears in the ability bar
• Block ability has appropriate icon and tooltip
• Block ability correctly interacts with the smart contract
• Cooldowns and stages work as designed
• Visual feedback when Block is active

Context

Feedback from Alex FastLane: Players need a Block ability for defensive gameplay options.

Note: Frontend work blocked until smart contract implementation is complete.

Labels: by-claude, enhancement, blocked, contract-dependency