Optimize bundle size for 10MB limit

[chitcommit]

Description\nCloudflare Workers have a 10MB size limit. Need to optimize bundle to stay well under.\n\nTasks\n- [ ] Analyze current bundle size\n- [ ] Identify largest dependencies\n- [ ] Implement code splitting where possible\n- [ ] Remove unused code\n- [ ] Use dynamic imports for large modules\n\nTarget\n- Bundle size < 8MB (80% of limit)\n- Cold start < 100ms\n