fix(extension): correct API_BASE URL to Netlify web app, store session_id, fix async sidePanel, clean up CRITICAL severity

🔧 v4.2: Critical bug fixes + performance optimizations (7 bugs, 4 perf improvements) (#3)

v3.0: Upload actual extension/background.js content

v3.0: Fix extension - send {text} not {clauses} to API, add rate limit handling

Fix auth sync: handle INITIAL_SESSION + TOKEN_REFRESHED events, sync on tab visibility change, remove flaky scripting.executeScript approach, add console.log for debugging

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 extension: remove module type, add 45s timeout for HF cold start, robust error handling

Point extension at live API: gaurv007-clauseguard-api.hf.space

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