Add documentation site and API enhancements

- Add Nextra documentation site with comprehensive guides
- Add Drift integration for Solana prediction markets
- Add all-markets aggregation endpoint
- Update existing API routes with improvements

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Leihyn

check-sx.js

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+const https = require('https');
+
+// Get a bettor's full history
+const bettor = '0xf59e93290383ed15f73ee923ebbf29f79e37b6d8';
+
+https.get(`https://api.sx.bet/trades?bettor=${bettor}&pageSize=100`, (res) => {
+  let data = '';
+  res.on('data', chunk => data += chunk);
+  res.on('end', () => {
+    const j = JSON.parse(data);
+    const trades = j.data.trades;
+
+    console.log('Total trades for bettor:', trades.length);
+    console.log('Count from API:', j.data.count);
+
+    // Count by settleValue (rounded for display)
+    const settleValues = {};
+    trades.forEach(t => {
+      const sv = Math.round(t.settleValue * 100) / 100;
+      if (!settleValues[sv]) settleValues[sv] = 0;
+      settleValues[sv]++;
+    });
+
+    console.log('\nSettleValue distribution:');
+    Object.entries(settleValues)
+      .sort((a, b) => b[1] - a[1])
+      .forEach(([k, v]) => console.log(`  ${k}: ${v} trades`));
+
+    // Check actual wins vs losses based on bettingOutcomeOne and outcome
+    let wins = 0, losses = 0, voids = 0;
+    trades.forEach(t => {
+      // If outcome matches bettingOutcomeOne, bettor won
+      if (t.outcome === 0) {
+        voids++;
+      } else if (t.bettingOutcomeOne && t.outcome === 1) {
+        wins++;
+      } else if (!t.bettingOutcomeOne && t.outcome === 2) {
+        wins++;
+      } else {
+        losses++;
+      }
+    });
+
+    console.log('\nActual results (based on outcome vs bettingOutcomeOne):');
+    console.log(`  Wins: ${wins}`);
+    console.log(`  Losses: ${losses}`);
+    console.log(`  Voids: ${voids}`);
+    console.log(`  Win rate: ${((wins / (wins + losses)) * 100).toFixed(1)}%`);
+
+    // Compare to what we're currently showing
+    console.log('\nCompare to settleValue=1 count:', settleValues[1] || 0);
+  });
+}).on('error', e => console.error(e));

docs-site/.gitignore

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+# Dependencies
+node_modules/
+.pnp
+.pnp.js
+
+# Build
+.next/
+out/
+build/
+dist/
+
+# Debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Local env files
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Vercel
+.vercel
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# TypeScript
+*.tsbuildinfo
+next-env.d.ts

docs-site/next.config.mjs

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+import nextra from 'nextra'
+
+const withNextra = nextra({
+  theme: 'nextra-theme-docs',
+  themeConfig: './theme.config.tsx',
+  defaultShowCopyCode: true,
+  flexsearch: {
+    codeblocks: true
+  },
+  staticImage: true,
+})
+
+export default withNextra({
+  reactStrictMode: true,
+  images: {
+    unoptimized: true,
+  },
+})