Minor updates and improvements.

SpeedGunner 1.1.0 is a big update focused on transparency, configurability, and polish. NEW FEATURES: • Monitored Spots — Save location presets with road distance, width, speed limit, and notes. Access from the new Spots tab. • Distance Trust Card — Every saved measurement now shows the distance source (LiDAR Auto, Tap Override, Saved Spot, Manual), with a High/Medium/Low trust grade based on calibration quality and data volume. • Speed Limit Mode — Set a local speed limit and see a red "+X" over-limit badge on the speed display. Option to restrict auto-capture to over-limit vehicles only. • Capture Rule Controls — Configure minimum capture speed, cooldown between captures, and "Every Vehicle" or "First Only" mode. • Session Summary — After closing the camera, see a summary with vehicles captured, fastest speed, average speed, over-limit count, and duration. • Evidence Export — Export a clean evidence card image with the best photo, timestamp, max speed, trust grade, and location/spot name. • Manual Calibration Prompt — On devices without LiDAR, you're now prompted to set a known distance via slider before scanning begins, ensuring accurate speed readings. • Tutorial on First Launch — A guided walkthrough appears on first launch and is always accessible from a button on the home screen. IMPROVEMENTS: • Redesigned home screen with quicker access to tutorial and monitored spots. • New Spots tab replaces the old quick-actions grid. • Simplified measurement result view — focused on the essentials. • Fixed a crash when opening a measurement with no captured frames.

Bug fixes and stability improvements: - Fixed thread safety issues in LiDAR distance calibration - Improved tap-to-override accuracy in all device orientations - Fixed photo saving for users with limited photo library access - Improved session cleanup when stopping mid-capture