feat(bokeh): implement scatter-basic

[claude]

Summary

Implements scatter-basic for bokeh library.

Parent Issue: #207
Sub-Issue: #255
Base Branch: plot/scatter-basic
Attempt: 2/3

Implementation

• plots/bokeh/scatter/scatter-basic/default.py

Details

• Uses bokeh.plotting.figure with scatter() method
• Target dimensions: 4800 × 2700 px (16:9 aspect ratio)
• Uses Python Blue color (#306998) from style guide
• Font sizes follow style guide recommendations (20pt for title/labels, 16pt for tick labels)
• Grid alpha set to 0.3 for subtle grid lines
• Exports as PNG using export_png()

⚠️ CI Blocker - Workflow Change Required

The CI tests are failing because the workflow needs to setup Chrome for bokeh (just like highcharts). This requires workflows permission and must be applied by a maintainer.

Error: RuntimeError: To use bokeh.io image export functions you need selenium

Fix required in .github/workflows/ci-plottest.yml:

# Change line 69-70 from:
- name: Setup Chrome for Highcharts
  if: steps.detect_libs.outputs.has_plots == 'true' && contains(steps.detect_libs.outputs.libraries, 'highcharts')

# To:
- name: Setup Chrome for Bokeh/Highcharts
  if: steps.detect_libs.outputs.has_plots == 'true' && (contains(steps.detect_libs.outputs.libraries, 'bokeh') || contains(steps.detect_libs.outputs.libraries, 'highcharts'))

Note: The implementation itself is correct and works locally. The lib-bokeh extras in pyproject.toml already include selenium and webdriver-manager.

[github-actions]

✅ Plot Tests Passed

Python 3.13 (required): passed

Compatibility:

Note: Only Python 3.13 is required to pass. Python 3.12 is tested for compatibility.