MeshMapper

### New Features
- Zone grace period for region transitions: driving between zones no longer disconnects you. The app pauses pinging and shows an "Out of Zone" overlay with the nearest zone name, distance, and a 5-minute countdown. Once you enter the next zone, pinging resumes automatically without reconnecting.
- Client-side zone transfers during active wardriving. When you cross into a new zone (e.g., BOS → PVD), the app handles the transfer directly: releases the old session, acquires a new one, updates channels and scopes, and resumes auto-ping automatically. A "Changing Zone..." overlay shows during the transfer with a cancel option.
- Color vision deficiency support now extends to map coverage tiles. When a color vision type is selected in Settings, the tile server returns adjusted coverage squares to match your palette. Supports protanopia, deuteranopia, tritanopia, and achromatopsia.
- Custom API endpoint forwarding: optionally forward your wardrive data to a third-party HTTPS endpoint alongside MeshMapper. Configure in Settings > API Endpoints with your URL and API key. Supports clipboard import for quick setup, optional device public key prefix and IATA zone code in payloads. Best-effort, never blocks wardriving. Full docs at https://wiki.meshmapper.net/app_third_party_api/.
- Ping Focus Mode: tap any ping marker to see which repeaters heard it. Draws dotted lines color-coded by signal quality with distance tags, fades unrelated markers, and zooms to fit. Works for all ping types. Ambiguous repeater matches get a white border outline. Dismiss to snap back to your previous view.
- Chomper GPS marker: a new marker style in Settings > GPS Marker. Cyan color, wide mouth that faces your direction of travel and rotates with heading.

### Bug Fixes
- Fixed noise floor graph showing wildly incorrect values (e.g., 13,000+ dBm) on certain devices. Some firmware versions return oversized BLE responses on the same response code as radio stats. Added frame validation to reject these responses.
- Tapping a repeater ID in the ping focus popup now shows distance from the ping location, not your current GPS position.
- Offline upload now shows "GPS required" instead of the misleading "Advert your device on the mesh" when GPS is disabled. Only GPS and network connectivity are needed, not a device connection.
- Improved error handling for malformed mesh packets. Corrupted packets with oversized path lengths now produce a clear diagnostic message instead of an unclear RangeError.
- Seeed Xiao nRF52840 boards are now automatically recognized during connection. Previously required manual power level selection on every connect.
- Repeater info popup no longer shows "Repeater data not available" for the entire session after a network timeout. A failed fetch is now automatically retried on the next zone check.
- Tapping a repeater ID chip no longer gets stuck on "Repeater data not available." Now fetches on demand with a loading indicator and tap-to-retry. Works in offline mode too.
- Zone check retry loop no longer continues after enabling Offline Mode. Retry timers and maintenance polling are now cancelled immediately.
- Zone check no longer gets stuck at "Checking Zone..." if the repeater list fails to load. The zone check now completes immediately and repeaters load in the background.
- Top-heard display and API payload now only track direct single-hop TX echoes for more accurate signal readings.
- Fixed iOS App Store upload rejection (ITMS-90683) caused by unused permission macros in the build. Only location and notification permissions are now included.
- Fixed power level hint on the Map tab incorrectly directing users to Settings instead of the Connect tab.

### Improvements
- Enhanced offline sessions display.
- Improved error logging when the API returns unexpected HTML responses (e.g., CDN/proxy error pages). Now logs a clear diagnostic instead of a raw FormatException.