feat: implement automated data type coercion and introduce dedicated agents and PDF export utilities to replace the deprecated application structure.

feat: implement web-based frontend and optimize metadata handling for project sessions

feat: implement PDF export module, workflow pipeline, and web-based dashboard UI

feat: implement web UI, expand data analysis pipeline, and add sample datasets

feat: upgrade visualizations, business insights depth, and PDF report design

feat(v3): modular ui/ package, subprocess sandboxing, per-session isolation, content-hash caching