chore(catalog): remove 13 interactive-first specs

[MarkusNeusinger]

Summary

Removes 13 specs whose core value is interactivity (click drilldown, brushing & linking, hover sync, play controls, animation) that anyplot's static renders fundamentally cannot capture.

Why

• The spec notes of these entries literally require interaction ("Click on a column to drill into its sub-level breakdown", "Show visual indicator (cursor change)", "Animate transitions") — unachievable in a static PNG.
• Static libraries can only fake the interaction, and each library fakes something different (e.g. the matplotlib bar-drilldown renders a multi-panel exploded view), breaking cross-library comparability.
• The static fallback always collapses into an existing spec: one drill level of bar-drilldown = bar-basic, one frame of bar-race-animated = sorted bar-horizontal, one frame of scatter-animated-controls = bubble-basic, static SPLOM = scatter-matrix, treemap/sunburst toggle = treemap-basic + sunburst-basic, etc.
• None of the 13 had any JS implementations; all sat at 5–10 of 15 libraries.

Removed specs

Spec	Static render collapses into
bar-drilldown	bar-basic
pie-drilldown	pie-basic
map-drilldown-geographic	choropleth-basic
pie-portfolio-interactive	donut-basic / donut-nested
hierarchy-toggle-view	treemap-basic + sunburst-basic
scatter-matrix-interactive	scatter-matrix
scatter-brush-zoom	scatter with a drawn rectangle
linked-views-selection	not representable statically
dashboard-synchronized-crosshair	multi-panel time series with frozen crosshair
line-navigator	line chart with a mini copy below
bar-race-animated	sorted bar-horizontal
scatter-animated-controls	bubble-basic
map-animated-temporal	scatter-map-geographic

Kept despite interactive-keyword matches (interactivity only incidental, static value intact): candlestick-volume, contour-3d, scatter-3d, line-3d-trajectory, hexbin-map-geographic, line-annotated-events, network-force-directed, stock-event-flags, dashboard-metrics-tiles, map-tile-background. Borderline map-marker-clustered kept for now.

Cleanup after merge

• Postgres: handled automatically by sync_to_postgres on push to main (removes specs/impls no longer in the repo).
• GCS: gs://anyplot-images/plots/<spec-id>/ preview images will be deleted manually after merge.
• Origin issues of the removed specs will be closed with a comment.

🤖 Generated with Claude Code

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