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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/shared/state/navigation.store.spec.ts

@@ -0,0 +1,37 @@
+import { TestBed } from '@angular/core/testing';
+import { describe, beforeEach, expect, it } from 'vitest';
+
+import { NavigationStore } from './navigation.store';
+
+describe('NavigationStore', () => {
+  let store: NavigationStore;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    store = TestBed.inject(NavigationStore);
+  });
+
+  it('starts at the galaxy view with nothing selected', () => {
+    expect(store.viewLevel()).toBe('galaxy');
+    expect(store.selectedStarId()).toBeNull();
+    expect(store.selectedBodyId()).toBeNull();
+  });
+
+  it('selectStar updates selectedStarId', () => {
+    store.selectStar(42);
+
+    expect(store.selectedStarId()).toBe(42);
+  });
+
+  it('selectBody updates selectedBodyId', () => {
+    store.selectBody('mars');
+
+    expect(store.selectedBodyId()).toBe('mars');
+  });
+
+  it('setViewLevel switches between galaxy and system', () => {
+    store.setViewLevel('system');
+
+    expect(store.viewLevel()).toBe('system');
+  });
+});

src/app/shared/state/navigation.store.ts

@@ -0,0 +1,27 @@
+import { Injectable, signal } from '@angular/core';
+
+export type ViewLevel = 'galaxy' | 'system';
+
+/**
+ * App-wide navigation state: which zoom level is active and what's currently selected.
+ * Scene components read these signals to drive rendering; UI (search, picking) writes to
+ * them to trigger navigation.
+ */
+@Injectable({ providedIn: 'root' })
+export class NavigationStore {
+  readonly viewLevel = signal<ViewLevel>('galaxy');
+  readonly selectedStarId = signal<number | null>(null);
+  readonly selectedBodyId = signal<string | null>(null);
+
+  selectStar(starId: number | null): void {
+    this.selectedStarId.set(starId);
+  }
+
+  selectBody(bodyId: string | null): void {
+    this.selectedBodyId.set(bodyId);
+  }
+
+  setViewLevel(viewLevel: ViewLevel): void {
+    this.viewLevel.set(viewLevel);
+  }
+}