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Three coordinated changes:
1. **VizType.CountryMapV2 = 'country_map_v2'** — new enum value for the
modern plugin's chart type. Existing dashboards continue to use
`country_map` (legacy plugin); new charts get `country_map_v2`.
Naming follows the established pattern (LegacyBubble='bubble',
Bubble='bubble_v2'). Eventual swap (in a major version) can rename
so 'country_map' points to the new plugin.
2. **Legacy plugin marked deprecated**:
- Display name changed to "Country Map (Legacy)" so the chart picker
shows them side-by-side unambiguously
- label: ChartLabel.Deprecated — surfaces the standard deprecation
badge in the UI without hiding from the picker (existing dashboards
keep working; users see "this is deprecated" when editing)
- labelExplanation pointing users at the new chart
3. **MainPreset registers both**:
- CountryMapChartPlugin (legacy) → VizType.CountryMap
- CountryMapV2ChartPlugin (new) → VizType.CountryMapV2
Plus added @superset-ui/plugin-chart-country-map as a workspace
dependency in superset-frontend/package.json so the symlink resolves
during npm install.
Not yet wired (next commits):
- "Switch to new Country Map" button on the legacy plugin's UI
(the deprecation banner shows; the button to migrate form_data
is a separate change in the explore controls)
- Hosting path for the new plugin's GeoJSON outputs (currently
stubbed in transformProps — no static file serving wired yet)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>