fix: route guard and landing page links for institutional login portal

feat: introduce dedicated Senti Institutional Login Portal with technical styling and dynamic role propagation

style: optimize topbar, chat container and sub-pages for fluid flexbox layout and mobile viewport sizes; fix superpacks process logger on crash

feat: support registration and PIN reset in mobile app, optimize chat layout and fix mobile sidebar collapsing

feat: enforce zero-mock multi-user privacy, fix chat overlap, integrate ocr file upload, and launch telegram bot

Fix backend crashes, unify auth registration, remove mock profile data, and sync personal vs business settings

fix: DB tables, signup 405, Brain LLM, favicon, title

feat: add signup page and verify PIN on login securely with bcrypt

fix: commit frontend/.env with relative API base path

Deploy Senti AI to Hugging Face Spaces