feaute: burn to ship

[Stephen01623]

Multi-Step Physical Redemption Flow

• Introduced a step-based state machine with select → shipping → verify → processing → success.
• Added holdings validation for gold, silver, and platinum before allowing redemption.
• Implemented shipping address validation to ensure proper input.
• Added Burn & Redeem button with a simulated blockchain transaction animation.
• Preserved existing dark gold aesthetic and card UI components.
• Created success confirmation screen
• Refactored bullion selection grid for dynamic price and token requirements.
• Updated RedemptionView to handle multi-step navigation and state transitions.
• Added visual feedback and loading states for high-fidelity user experience.

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After: