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Add star-map Angular app, ETL pipeline, and caveman plugin

Angular 3D star map (galaxy/system/body views, Three.js rendering,
navigation store) plus the NASA ETL tooling that builds the star,
exoplanet and solar-system datasets, Playwright e2e suite, and the
cs:caveman Claude Code plugin (command, agent, skill).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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src/app/features/body-detail/body-detail.model.ts

@@ -0,0 +1,19 @@
+import { OrbitalElements } from '../../shared/models/body.model';
+
+export type BodyDetailKind = 'planet' | 'moon' | 'dwarf' | 'exoplanet';
+
+/**
+ * Flattened view model combining the fields `InfoPanelComponent` displays, regardless of
+ * whether the selected body came from `bodies.json` (solar-system `BodyRecord`) or
+ * `exoplanets.json` (`ExoplanetRecord`) — the two sources report different subsets of data.
+ */
+export interface BodyDetailViewModel {
+  id: string;
+  name: string;
+  kind: BodyDetailKind;
+  hostStarName: string;
+  radiusKm?: number;
+  massEarth?: number;
+  discoveryYear?: number;
+  orbit: Partial<OrbitalElements>;
+}