[rozyczko]

• Introduced two new dataclasses, _ReflectivitySeries and _SldSeries, to clearly represent entries in the reflectivity and SLD figures, encapsulating both measured and calculated data, their labels, colors, and vertical offsets.
• Replaced the old _measured_series and _model_curve logic with a new _reflectivity_series method, which comprehensively determines what to plot for each experiment/model, including correct handling for spin channels, overlays, and vertical shifts.
• Updated the SLD and reflectivity plotting methods (save_sld_plot, save_fit_experiment_plot, _sld_plotly_figure, _fit_experiment_plotly_figure) to use the new series dataclasses, ensuring consistent appearance and correct legend/grouping in both matplotlib and Plotly figures.

Data Handling and Visualization Improvements

• Improved handling of polarized experiments: each spin channel now gets its own color and label, and spin-flip channels for non-magnetic models are correctly omitted from overlays to avoid misleading plots.
• Added logic to shift multiple experiments vertically in reflectivity plots to prevent overlap, and clarified legend entries for shifted curves.
• Ensured that the correct datasets are plotted after a fit, even if experiments have changed since the fit, by tracking drawn datasets and their channels.

Internal Utilities

• Refactored _named_parameters to correctly collect and display parameter ownership across shared models, improving parameter table accuracy.

[codecov]

Codecov Report

❌ Patch coverage is 98.94737% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 95.97%. Comparing base (67141e7) to head (c9f3cb9).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/easyreflectometry/summary/summary.py	98.94%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #447      +/-   ##
===========================================
+ Coverage    95.68%   95.97%   +0.28%     
===========================================
  Files           60       60              
  Lines         7300     7349      +49     
===========================================
+ Hits          6985     7053      +68     
+ Misses         315      296      -19     

Flag	Coverage Δ
integration	38.64% <0.00%> (-0.26%)	⬇️
unittests	95.97% <98.94%> (+0.28%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/easyreflectometry/summary/summary.py	98.19% <98.94%> (+7.00%)	⬆️

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