feat(detection): implement multi-page token detection system

- 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)

surfsense_browser_extension/sidepanel/chat/ChatInterface.tsx

@@ -21,7 +21,9 @@ import {
 import { SafetyScoreDisplay } from "../crypto/SafetyScoreDisplay";
 import { WatchlistPanel } from "../crypto/WatchlistPanel";
 import { AlertConfigModal } from "../crypto/AlertConfigModal";
+import { DetectedTokensList } from "../components/DetectedTokensList";
 import type { WatchlistItem } from "../widgets";
+import type { TokenData } from "../context/PageContextProvider";
 
 type ViewMode = "chat" | "watchlist" | "safety";
 
@@ -471,6 +473,14 @@ What would you like to know?`;
         }, 500);
     };
 
+    /**
+     * Handle detected token click
+     */
+    const handleDetectedTokenClick = (token: TokenData) => {
+        const query = token.tokenSymbol || token.pairAddress;
+        handleTokenSearch(query);
+    };
+
     return (
         <div className="flex flex-col h-full">
             {/* Header with space selector and settings */}
@@ -495,6 +505,14 @@ What would you like to know?`;
                 />
             )}
 
+            {/* Detected tokens list (on Twitter and other pages) */}
+            {context?.detectedTokens && context.detectedTokens.length > 0 && viewMode === "chat" && (
+                <DetectedTokensList
+                    tokens={context.detectedTokens}
+                    onTokenClick={handleDetectedTokenClick}
+                />
+            )}
+
             {/* Main content area */}
             <div className="flex-1 overflow-y-auto">
                 {viewMode === "chat" && (