Changelog

• Navigation input filters (experimental)
• NTRIP caster, client, and server with optional TLS
• CLI tools: gnsshat-info, gnsshat-probe
• gnsshat-rtk-base - RTK base station tool with TOML config and a systemd service unit
• Helpers for reading the HAT EEPROM device-tree entries without instantiating IGnssHat - JimmyPaputto::Hat namespace
• Many CMake fixes including Version.hpp generation for single version source
• CI workflows for self hosted services including RPI4, RPI5 and x64 machine for more frequent checks

• Tests link against shared library instead of recompiling sources
• Visualization app: new Altitude tab - one-axis tape altimeter
• Visualization app: Configuration tab gained a NavigationFilters section with an Elevation Mask slider (0–60°)
• Visualization app: per-chart light / dark theme toggle
• Visualization app: RF Analyzer no longer flickers “No RF data” when only one of spectrum / rf_blocks is present in a frame; spectrum x-axis tick density is now width-aware
• Visualization app: Relative Map and Altitude charts support mouse wheel zoom on hover plus +/- zoom buttons next to the range slider;
• Visualization app: Grid ladder extended down to 1 cm for RTK-grade ranges
• Visualization app: Sky View and RF Analyzer theme toggles moved intoa proper .map-info toolbar matching the other tabs

Initial release — C++, C, and Python driver library for NEO-M9N, NEO-F10T, and NEO-F9P GNSS HATs. Includes UBX protocol support, navigation, RTK, geofencing, time base/mark, timepulse, gpsd forwarding, examples, and a Flask visualization app.