What's New

Performance optimization, URL state, and developer experience

• —Use-case selector on pricing page recommends the right plan for hobby, club, pro, and team drivers
• —Lazy loading for 7 heavy session detail components (charts, debrief, corners, focus mode)
• —URL state management for session list filters — bookmarkable and shareable filtered views
• —React Query devtools in development mode for query inspection and debugging
• —Build-time environment variable validation — fail-fast on missing NEXT_PUBLIC_API_URL
• —CSS containment extended to chart wrappers, sidebar, and main sections for layout performance
• —SVG favicon, web app manifest, and proper icon metadata
• —Hydration error auto-recovery with friendly UI and Sentry tagging
• —Node.js version enforcement via engines field and .nvmrc
• —Click-to-copy lap times in session detail table
• —Navigation progress bar for page transitions
• —Social sharing buttons (X, LinkedIn, Facebook) on product and customer pages
• —Dismissible announcement bar for new feature notifications
• —nofollow on third-party external links for SEO hygiene
• —CSP hardened with object-src none and upgrade-insecure-requests
• —Breadcrumb navigation on all marketing pages (Home > Page)
• —Chart crosshair sync toggle in session detail tab bar
• —formatDateTime and formatDateFromTimestamp utilities for consistent date rendering
• —Last-uploaded session quick-access card on dashboard
• —Accessibility compliance statement page (WCAG 2.2 AA)
• —Removed all TypeScript any types — replaced with Record<string, unknown> and proper typing
• —Console error/warning monitoring in development diagnostics overlay (Ctrl+Shift+D)
• —CDN-Cache-Control headers for optimized Cloudflare edge caching
• —useMemo optimization for column definitions in session list and leaderboard
• —API response gzip compression for JSON payloads over 1 KB
• —PostgreSQL connection and statement timeout configuration via environment variables
• —PostgreSQL connection retry with backoff on transient failures
• —CSP report-uri directive wired to backend /csp-report endpoint
• —ESLint rules for React performance (exhaustive-deps, no-array-index-key)
• —Section error boundary component with retry for graceful degradation of page sections
• —Zustand dev-only action logging middleware for state debugging
• —Next.js build cache in CI for faster rebuilds
• —Dependabot for automated npm and GitHub Actions dependency updates
• —Workspace-scoped rate limiting for team API quota sharing
• —Optimistic updates on session deletion for instant UI feedback
• —Request context propagation (request_id, user_id, workspace_id) to Celery background tasks
• —Comprehensive OpenAPI 3.0.3 spec auto-generated from Flask routes with Pydantic schema extraction
• —Swagger UI at /api/v1/docs for interactive API exploration with all 150+ endpoints documented
• —Route metadata registry for query params, request bodies, error codes, and rate limit tiers
• —AI coaching engine with session narrative synthesis, lap progression analysis, and practice drill generation
• —GET /api/v1/sessions/:id/coaching endpoint returns structured debrief with theme, focus areas, and goals
• —Predictive lap time model using weighted k-nearest-neighbor regression over historical sessions
• —Conditions-based adjustments for grip, temperature, and driver improvement trends
• —GET /api/v1/sessions/:id/predict endpoint with improvement potential vs theoretical minimum
• —Corner detection accuracy improved for tight circuits: adaptive min-length, peak separation, and expansion ratio
• —Low-speed hairpin detection with reduced minimum speed threshold (3.0 → 1.5 m/s)
• —Chicane annotation on alternating-direction corner sequences within 80m
• —Multi-session comparison endpoint (GET /api/v1/compare/multi) supports 2-8 sessions with pairwise delta matrix

Design system components, accessibility, and developer experience

• —Chart accessibility: all 12 chart containers now have aria-label descriptions for screen readers
• —Command palette (Ctrl+K / Cmd+K) for fast navigation across 20 app pages
• —Animated score counter with IntersectionObserver-triggered count-up effect
• —Sticky app header with backdrop blur for persistent navigation access
• —Chart fade-in animations on render for smoother visual transitions
• —Undo toast system with 5-second countdown for destructive actions
• —HowTo structured data schema on help page for rich search results
• —Review schema markup for customer testimonials
• —Organization schema with social proof metrics on product page
• —New design system components: Avatar, Badge, Card, Input, Dropdown, DataTable, Modal, Spinner, Truncate, AutoSaveIndicator
• —LAP vs Spreadsheets comparison page with 12-feature table
• —Enhanced HTML sitemap with use cases and resource pages
• —Button micro-interactions: deeper active press with brightness feedback

Marketing and onboarding improvements

• —A/B tested CTA button text on pricing page via experiment cookies
• —Platform stats strip on homepage (sessions, drivers, tracks, uptime)
• —Feature tooltips in pricing comparison matrix
• —Quick comparison table with checkmarks for at-a-glance plan view
• —Optimized signup form — 2 required fields, social login prominent
• —Post-signup activation checklist on dashboard
• —NPS survey for active users with 90-day cooldown
• —Social proof notification popups on homepage
• —Sticky mobile CTA bar on pricing page
• —Pricing card hover micro-animations
• —Promotional countdown timer component
• —Customer logo wall section on homepage
• —SEO meta descriptions for all marketing pages

Corner coaching with cause-ranked delta maps

• —Identify braking, turn-in, and throttle deltas per corner
• —Ranked coaching suggestions based on time-loss magnitude
• —New corner overlay in GPS trace view

Multi-session comparison and cross-chart hover sync

• —Compare up to 4 sessions side-by-side
• —Distance-based hover sync across speed, GPS, and G-G charts
• —Improved lap-time delta visualization

Security audit fixes and auth hardening

• —Refresh tokens moved to httpOnly cookies
• —Security headers added to API and frontend
• —Upload content validation strengthened

Workspace isolation and team management

• —Multi-tenant workspace support with RLS
• —Team invitations with role-based access control
• —Personal workspace auto-created on registration

Streaming ingest pipeline for large files

• —Process 10GB+ files with under 1GB peak memory
• —Chunked Parquet caching with resume support
• —Adaptive chunk sizing based on column count

Initial release: 14-stage telemetry pipeline

• —RaceChrono and RaceBox CSV ingestion
• —Automatic track detection and corner identification
• —Pace, Consistency, Execution, and Robustness scoring
• —Speed trace, GPS trace, and G-G diagram visualizations