[FE] Creator Quests hub UI

[Kaylahray]

Description

Build the Creator Quests hub to match [DESIGN] Creator Quests hub: search chrome, Active / Drafted / Completed tabs, quest rows, empty Active state, “+ Add new Quest”. Fixture data OK until API wiring.

User Story

As a Founder,
I want the Quests hub in the app,
so that I can manage campaigns as designed.

Requirements and Context

• Files: frontend/src/app/creator/quests/, new components under components/creator/quests/ as needed
• Implement from approved Figma
• Tabs with counts; empty Active; populated rows (pool, per winner, responses, time)
• Per-tab actions: Review responses / Edit quest / View quest
• “+ Add new Quest” → create wizard route

Suggested Implementation

// Quests hub page + QuestRow + EmptyActive
// CTA → /creator/quests/new
// Fixtures until GET /missions/me

Acceptance Criteria

• Matches design breakpoints in Figma
• Empty Active + three tabs work
• Add new Quest opens wizard
• Row actions match tab

Submission Guidelines

• Branch: feat/fe-creator-quests-hub
• Depends on: [DESIGN] Creator Quests hub
• PR: feat(frontend): creator Quests hub UI