## Summary
Implements `scatter-basic` for **altair** library.

- Basic scatter plot with 100 sample data points showing positive
correlation
- Python Blue color (#306998) with appropriate opacity
- Proper axis labels and chart title
- Output: 4800x2700px (via scale_factor=3.0)
- Includes tooltips for interactivity

**Parent Issue:** #207
**Sub-Issue:** #262
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/altair/point/scatter-basic/default.py`

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **seaborn** library.

**Parent Issue:** #207
**Sub-Issue:** #241
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/seaborn/scatterplot/scatter-basic/default.py`

## Changes
- Simplified implementation following KISS principle (no functions, no
classes, no type hints)
- Uses sequential script structure matching matplotlib gallery examples
- Python Blue (#306998) color from default style guide
- Proper figure size (16x9) with appropriate font sizes (20pt for
labels/title, 16pt for ticks)
- Grid with subtle alpha (0.3) for visual clarity

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **plotnine** library.

**Parent Issue:** #207
**Sub-Issue:** #268
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/plotnine/point/scatter-basic/default.py`

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **plotly** library.

**Parent Issue:** #207
**Sub-Issue:** #248
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/plotly/scatter/scatter-basic/default.py`

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **pygal** library.

**Parent Issue:** #207
**Sub-Issue:** #272
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/pygal/xy/scatter-basic/default.py`

## Details
- Uses pygal's XY chart type for scatter plot visualization
- Follows pyplots color palette (Python Blue #306998)
- Generates 100 correlated random data points
- Output: 4800 × 2700 px PNG image
- Grid guides enabled for visual clarity

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **highcharts** library.

**Parent Issue:** #207
**Sub-Issue:** #275
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/highcharts/scatter/scatter-basic/default.py`

## Details
- Uses highcharts-core Python library with Selenium for PNG export
- Follows pyplots style guide with Python Blue (#306998) color
- Target image dimensions: 4800 × 2700 px
- Generates 100 random data points with clear correlation pattern
- Clean axis labels and title with appropriate font sizes

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **letsplot** library.

**Parent Issue:** #207
**Sub-Issue:** #278
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/letsplot/point/scatter-basic/default.py`

### Features
- Uses lets-plot's ggplot2-style grammar of graphics
- Generates 4800 × 2700 px output (16:9 aspect ratio)
- Python Blue (#306998) color from style guide
- Proper alpha transparency for overlapping points
- Clear axis labels and title with appropriate font sizes

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **plotly** library.

**Parent Issue:** #207
**Sub-Issue:** #405
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/plotly/scatter/scatter-basic/default.py`

## Changes
- Uses `plotly.graph_objects.Scatter` with markers mode
- Python Blue (#306998) color with 0.7 opacity
- Proper font sizing for 4800x2700 output (title/axis: 40pt, ticks:
32pt)
- Clean white template with subtle grid
- Margins adjusted for label visibility

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **altair** library.

**Parent Issue:** #207
**Sub-Issue:** #406
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/altair/point/scatter-basic/default.py`

## Changes
- KISS-style scatter plot implementation
- Uses Python Blue color (#306998)
- Proper axis labels (X Value, Y Value) and title
- 100 random data points with correlation pattern
- Output: 4800x2700px PNG (via scale_factor=3.0)

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **highcharts** library.

**Parent Issue:** #207
**Sub-Issue:** #409
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/highcharts/scatter/scatter-basic/default.py`

## Changes
- Basic scatter plot with 100 random data points showing positive
correlation
- Python Blue (#306998) markers for data points
- X and Y axis labels with clear font sizes (40px)
- Grid lines for readability
- Chart dimensions: 4800 x 2700 px
- Uses element screenshot for accurate PNG capture

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **plotnine** library.

**Parent Issue:** #207
**Sub-Issue:** #407
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/plotnine/point/scatter-basic/default.py`

## Changes
- Added typography settings (plot_title, axis_title, axis_text) for
proper font sizes at 4800x2700px
- Uses Python Blue (#306998) from style guide
- Generates 4800x2700px PNG output at 300 DPI

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **letsplot** library.

**Parent Issue:** #207
**Sub-Issue:** #410
**Base Branch:** `plot/scatter-basic`
**Attempt:** 2/3

## Implementation
- `plots/letsplot/point/scatter-basic/default.py`

## Features
- Uses lets-plot ggplot2-style grammar of graphics
- Python Blue (#306998) color for data points
- Proper sizing (4800x2700px via scale=3)
- theme_minimal() with custom font sizes for readability
- Follows all quality criteria and style guide requirements

## Note
Previous PR #449 was closed due to transient GitHub Actions
infrastructure timeout (unrelated to code).

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **matplotlib** library.

**Parent Issue:** #207
**Sub-Issue:** #319
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/matplotlib/scatter/scatter-basic/default.py`

## Details
- 100 random data points with linear correlation pattern
- Python Blue (#306998) markers with alpha transparency
- Font sizes optimized for 4800x2700 output (20pt labels, 16pt ticks)
- Grid enabled with subtle alpha for visual clarity
- Marker size increased to 80 for better visibility at high resolution

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **highcharts** library.

**Parent Issue:** #207
**Sub-Issue:** #442
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/highcharts/scatter/scatter-basic/default.py`

## Details
- Basic scatter plot with 100 random data points showing positive
correlation
- Uses Python Blue (#306998) color for data points (from style guide)
- X and Y axis labels with readable font sizes
- Grid lines at 10% opacity for subtle visual guidance
- Chart dimensions: exactly 4800 x 2700 px (16:9 aspect ratio)
- Uses PIL to crop screenshot to exact dimensions required
- Headless Chrome + Selenium for PNG export
- Inline Highcharts JS embedding (required for headless Chrome)

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## 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`:**

```yaml
# 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.

---------

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Markus Neusinger <2921697+MarkusNeusinger@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **altair** library.

- Basic scatter plot with 100 random data points showing correlation
- Uses Python Blue (#306998) from style guide
- Configured for 4800x2700px output (1600x900 with scale_factor=3)
- Includes tooltips for interactivity
- Proper axis labels, title, and font sizing

**Parent Issue:** #207
**Sub-Issue:** #441
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/altair/point/scatter-basic/default.py`

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

## Summary
Implements `scatter-basic` for **highcharts** library.

**Parent Issue:** #207
**Sub-Issue:** #491
**Base Branch:** `plot/scatter-basic`
**Attempt:** 1/3

## Implementation
- `plots/highcharts/scatter/scatter-basic/default.py`

## Changes
- Uses spec example data (8 data points) for the scatter plot
- Screenshots the chart container element directly for exact 4800x2700
dimensions
- Removed PIL dependency by using Selenium element screenshot
- Adjusted font sizes for better readability at high resolution (60px
title, 48px axis labels, 40px tick labels)
- Uses Python Blue (#306998) color from the style guide

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>