style(landing): update stats cards to be authentic to backend metrics and agent pipeline

feat(ui): implement workspace section for deploying and viewing live agent investigations

feat(auth): implement Google OAuth and Email/Password authentication

feat(hero): remove Watch Demo, center CTA, fix footer tech strip gap, add Verifier Agent stat, improve headline split

style(frontend): prevent cutting off stats cards at bottom boundary by removing overflow-hidden and using min-h-screen

style(frontend): make background video page-wide and fixed for unified single-page layout

style(frontend): fix hero title overlap and adjust typography

adapt Hero and Capabilities copy to match Agentic Investigation Core features

implement HeroSection component with dynamic full-viewport design

initialize React Vite frontend project with Tailwind v4 setup