Changelog

Critical stability release — three E2E-identified issues resolved with zero breaking changes.

Bug Fixes

• Maintenance Reminders now accessible from main menu — added vehicle selector UI when no vehicle is pre-selected, eliminating the dead-end "No Vehicle Selected" screen.
• Trip speed statistics now display correctly — fixed GPS speed capture (added hasSpeed() check), corrected average speed calculation to exclude zero-speed data points, added trip-end warnings for very short trips.
• VIN scanner manual entry now transfers to form — scanned or manually typed VINs are now reliably passed back to the Add Vehicle screen via shared ViewModel state; VIN is auto-formatted and cleared after use to prevent stale data.

Phase 2.1 feature release — major new tools and significant performance improvements.

New Features

• VIN Decoding via NHTSA vPIC API — one-tap VIN decode automatically populates Year, Make, Model, Trim, Engine, Transmission, and Drive Type.
• Trip Recorder — GPS trip tracking with OBD data overlays, adaptive GPS intervals for battery efficiency, trip statistics (distance, duration, avg/max speed, fuel consumption), and CSV export.
• Maintenance Reminders — 12 service categories with mileage-based reminders, recurring intervals, urgency badges, and service history tracking.
• Theme Customization — 4 themes (Classic, Sunset, Forest, Midnight) with Material You dynamic colors and instant preview.

Performance & Quality

• 40% reduction in battery drain during background operation.
• 30% reduction in memory usage.
• Pull-to-refresh added across all major screens.
• Proper loading state indicators throughout the app.
• 40+ unit tests added.
• Result pattern adopted for consistent error handling.

Dashboard view and connection management overhaul.

New Features

• Dial Gauge Dashboard — automotive-style dial gauges for up to 4 parameters simultaneously in a 2×2 grid; sweeping needle animations; color-coded warning and danger zones for RPM, coolant temp, and engine load.
• "Scan for Codes" shortcut on main menu — direct access without navigating through the connect flow first.
• Connection status indicators — compact color-coded badge in every screen's top bar showing live connection state.
• Smart connection banners — full-width one-tap "Connect" banner shown on any screen that requires an active connection.
• Disabled state management — Refresh, Clear, Play, and Record buttons automatically disabled when no scanner is connected.

Screens Updated

• Codes Screen — connection indicator, banner, disabled button states.
• Live Data Screen — connection indicator, banner, dashboard toggle.
• Graph Dashboard — connection indicator, banner, disabled record button.
• Readiness Check — connection indicator, banner, disabled refresh.