fix(chat/demo): remove memory search — bubble chat is a public guide bot only, no db access

fix(chat): lower similarity threshold to 0.70 and use raw_text for CSV-ingested data

feat: add /chat/demo endpoint to power KaalChat widget with memory

refactor: centralise all magic numbers into config.py driven by env vars

feat: bi-temporal supersession, scope isolation, configurable threshold, benchmark adapter

fix: billing body binding (Pydantic model), surface real error in WelcomeScreen

security: add Turnstile captcha + IP rate limiting + email dedup to key generation

feat: store Amber voice as base64 py constant to avoid binary in git, fix speaker_wav references in TTS route

feat: add XTTSv2 TTS endpoint + public demo chat with Amber voice, template-first responses, and Chronos memory consent storage

Rebrand to Kaal — rename from Chronos OS, add Logo component with serif seal design, swap all Hexagon icons for Logo

Security: Enforce strict tenant data isolation across all API routes (query, connectors, agent)

Migrate to Vercel Next.js UI Frontend, prune 10x SVO model overhead payload

Initial commit for Chronos OS MVP