- Add extractTwitterTokens() to detect $TOKEN mentions (e.g., $BONK, $SOL)
- Add extractContractAddresses() for Solana (base58) and Ethereum (0x) addresses
- Add extractTradingPairs() to detect TOKEN/SOL, TOKEN/USDT patterns
- Update extractPageContext() to use new detection functions
- Add detectedTokens field to PageContext interface
- Create DetectedTokensList component to display detected tokens
- Integrate DetectedTokensList into ChatInterface
- Add handleDetectedTokenClick to analyze selected tokens
- Support auto-detection on Twitter, generic pages, and DexScreener
Implements Task 2: Multi-Page Token Detection
Part of hybrid token detection system (manual search + auto-detect)
