feat(sankey_plot_template): add sankey_plot_template function and uni…

[fangliu117]

…t tests

[Copilot]

Pull Request Overview

This PR adds a new Sankey plot template function with comprehensive unit tests. The implementation converts an existing NIDAP template to a platform-agnostic Python function that creates Sankey diagrams from single-cell analysis data.

• Adds sankey_plot_template.py with run_from_json function for creating Sankey plots from AnnData objects
• Implements comprehensive test suite with mocking for I/O operations and plot generation
• Supports multiple output formats (static PNG, interactive HTML) with configurable parameters

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
src/spac/templates/sankey_plot_template.py	Main template implementation with JSON parameter parsing and multi-format plot output
tests/templates/test_sankey_plot_template.py	Comprehensive unit tests with mocked data and I/O operations

Comments suppressed due to low confidence (1)

src/spac/templates/sankey_plot_template.py:113

• The variable name 'static' is confusing as it refers to a matplotlib figure object, not a static value. Consider renaming to 'fig_static' or 'matplotlib_fig' for clarity.

    static, axs = plt.subplots(1, 1, figsize=(width_num, height_num), dpi=dpi)