fix(ui): add navbar link to API Docs alongside system reset

feat: user-controlled pipeline depth sliders for stage1/stage2 retrieval caps

feat: add system reset page and centralize API utility functions

feat: implement session management UI and pre-bake AI models into Docker image

fix: enforce relative api routing in production

feat: implement automated ingestion pipeline with state persistence and add database maintenance utilities

refactor: unified session view, pipeline polling, db wipe

feat: add pipeline page, session delete with Qdrant cleanup, explain worker, and final frontend polish

feat: finalize frontend candidate UI and containerization workflow

feat: build Next.js frontend design system and upload flow