Auth Response Overhaul & Codebase Refactoring

What’s New

• Standardized all auth API responses with statusCode, message, and timestamp envelope
• Renamed token fields to camelCase (accessToken, refreshToken, tokenType, expiresIn)
• Removed PublicUser from login/register responses — tokens only
• Added Google OAuth login support
• Redesigned /apps/settings page with Resend design system
• Redesigned /apps/endpoints page with Resend design system
• Redesigned /about page with cinematic Resend-inspired layout
• New 404 and 500 error pages with minimal Resend design

Improvements

• Made /docs/* pages fully responsive for mobile devices
• Added mobile hamburger menu to docs navbar
• Fixed docs breadcrumb overflow on small screens
• Reduced docs heading/text sizes on mobile for better readability
• Optimized docs inline script — removed is:inline for Vite bundling and caching
• Extracted extractErrorMessage to shared @/lib/error-utils.ts (removed 5 duplicates)
• Fixed useState violations in UsersDataTable, TrueFocus, Magnet — migrated to useReducer
• Removed dead normalizeName/normalizeEmail methods from auth service
• Removed /careers and /blog pages

Fixes

• Fixed missing CacheService and PublicUserSource imports in auth service
• Fixed auth service spec test assertions for new response format