feat(mobile): Create pool creation screen with pre-flight checks

[rafamiziara]

Overview

Create CreatePoolScreen with pre-flight validation and complete pool creation flow.

Tasks

• Create screens/CreatePoolScreen.tsx
• Implement pre-flight checks (gas balance, optional chain verification)
• Integrate CreatePoolForm component
• Wire up form submission to usePoolCreation hook
• Handle transaction submission flow
• Show transaction status (submitting → submitted → confirmed/failed)
• Navigate to pools list after submission
• Show appropriate toasts for success/error states

Pre-flight Checks

• Check sufficient balance for gas
• Optional: Verify user on supported chain
• Show clear error messages for failed checks

Acceptance Criteria

• Screen only visible to authenticated users
• Pre-flight checks prevent invalid submissions
• Complete transaction flow from form to confirmation
• Proper navigation and user feedback
• Error handling for all failure scenarios

Related Documentation

• See docs/POOL_CREATION_ARCHITECTURE.md Phase 1 & 3
• See docs/POOL_CREATION_TASKS.md Task 14

Labels: comp: frontend, type: feature

Milestone: Sprint 3: Pool Creation

Part of Epic: #35