[DSL] 7.5 Optimization + Final Official Release Cleanup

**Size:** M **Description:** Performance optimization and bundle size reduction. **Implementation:** - Profile render performance - Optimize string concatenation - Verify tree-shaking works - Measure bundle sizes **Acceptance:** - [ ] Benchmark suite created - [ ] No performance regressions - [ ] Tree-shaking verified (unused code eliminated) - [ ] Bundle size documented - [ ] ESM and CJS both optimized