feat: add market stats endpoint, wallet integration, and browser wallet link
- Update devnet genesis timestamp to 1767000206
- Add market statistics endpoint with 24h volume, price change, and payment counts
- Add wallet balance and info API endpoints in exchange router
- Remove unused SessionDep dependencies from exchange endpoints
- Integrate real AITBC wallet extension connection in trade-exchange UI
- Add market data fetching with API fallback for price and volume display
- Add cache-busting query
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