v3.6.0

Main

Prepare for the release of GeoPathSampleR package and GeoTwilight paper:

• Strengthen fitted-location estimation with multi-start optimization, normalized twilight residuals, and a zenith-angle prior.
• Refine fitted calibration anchors using local twilight likelihoods before global calibration.
• Expose fitted-anchor diagnostics in the calibration workflow and plotting functions.

Minor

• Add time_shift to tag_create() with corresponding parameter display and test coverage.
• Improve find_stap() handling of non-regular stationary-period IDs while preserving the correct IDs.
• Add land_threshold to mask_water() for configurable land masking.
• Rename max_twl_gap_hours to max_twl_gap in daily stationary-period generation.
• Rename tag_stap_daily() arguments: stap0 becomes stap_long and twl_grouping becomes movement_period, with deprecated aliases retained for compatibility.
• Allow plot_twl_calib() without a zenith column by defaulting to known zenith values.
• Improve Plotly relayout and range-selection handling, including epoch-millisecond event times and hidden overview traces (8efc6f9c, 51efd0e5).
• Fix map-setting invalidation when labels change and handle missing values in logical indexing.
• Add grouped Leaflet layers to plot_path() for clearer posterior-path visualization.
• Preserve pressure metadata during geopressure_timeseries() normalization.
• Fix the maxSample request parameter used by geopressure_map_mismatch().
• Improve GeoPressureViz background pressure queries when running from a development source tree (f13c1e7a, f61a3fff) and provide clearer query errors.
• Add an explicit close button to the Trainset Checks modal.
• Expose likelihood and distance helpers for companion packages while keeping them internal to GeoPressureR.

Full Changelog: v3.5.4...v3.6.0