fix(popup.js): async sidePanel.open, add CRITICAL severity count, show session_id source

Replace all clauseguard.com URLs with clauseguardweb.netlify.app

Website↔Extension bridge: auto-detect login, sync user/plan to extension, guest mode, scan history, user bar in popup

Fix: add forgot password + magic link, /privacy, /terms, fix all # links, extension upgrade banner on limit

Fix popup.js: match new HTML element IDs, null-safe all DOM access, wrap all chrome calls in try/catch

🛡️ ClauseGuard v1.0 — Full codebase: Extension + Website + API + ML