[FE] Quest and Will Interaction

[MelonChicken]

Goal

Connect quest completion and will reward interaction on the frontend.

Tasks

• Show today's quest list
• Show quest status
• Add claim reward button
• Connect quest claim API
• Update will balance after reward claim
• Show success/error message

Done When

• User can see today's quests
• User can claim quest reward
• Will balance updates after claiming reward
• Duplicate claim is handled clearly

[Driedoutjerky]

Closed by #30