- Remove shebang from bin/folk-server (breaks strict_types via Composer proxy)
- chdir() to project root derived from autoload path (ZTS CWD differs)
- SpiralHttpHandler: run inside Scope('http') for middleware resolution
- SpiralHttpHandler: implements HttpModeHandler directly with PSR-7 conversion

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>