List stars in search and routes by the type their colour gives them, and say where archive positions come from

5333be6 gave the star card an estimated type for the 383 695 stars the ETL files as "Unknown",
but search rows, the route search index and the current-star route option still printed that
literal: TRAPPIST-1 read "STAR · UNKNOWN" in search beside "Spectral type ~M8, from colour" on its
card, audit #17's own symptom. spectralClassification (spectral.ts) now gives the catalogue's type,
else the colour's marked "~", else nothing, and all three and the card's subtitle use it; a search
row with nothing to add prints its kind alone rather than a trailing " · ".

The neighbourhood note still read "Positions from measured parallaxes" after 4c8e4a0 placed 3 277
stars at the Exoplanet Archive's sy_dist, 343 of them without a usable parallax and 281 of those
past 1 kpc — microlensing hosts such as OGLE-2005-BLG-390L at 6.6 kpc, from a lensing model.
positionsNote now says so, with the count. Neither the note nor the census subtitle (audit #16) had
a test: putting back "Hipparcos · Yale Bright Star · Gliese" passed all 775.

In the app on :4302: the note reads "Positions from measured parallaxes, and for the 3,277 planet
hosts only the NASA Exoplanet Archive places, from its distances. Grid marks the galactic plane
through the Sun."; search reads "TRAPPIST-1 STAR · ~M8", "OGLE-2005-BLG-390L STAR", "Sirius STAR ·
A0M"; TRAPPIST-1's route option has subtitle "~M8".

The scene spec gains an archive-placed fixture star. Controls, each failing its named test: the
search row printing the raw type, keeping the separator with nothing after it, the route index
and the current-star option printing the raw type, the note back to parallaxes only, the subtitle
back to the old catalogue list (1 of 797 each), the note never counting the archive (2 of 797),
and the classification without its estimate (3 of 797).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/app/features/galaxy-system/galaxy-system-scene.component.spec.ts

@@ -14,6 +14,7 @@ import { LinkBudget } from '../../shared/astro/jump-links';
 import { HudDisplay } from '../hud/hud-dock.component';
 import { GalaxySystemSceneComponent } from './galaxy-system-scene.component';
 import { galacticNormal } from './grid-plane';
+import { catalogueCensus, positionsNote } from './star-readouts';
 import { closestApproachAu, SUN_RADIUS_AU } from './system-framing';
 import { blackbodyColor, SOLAR_EFFECTIVE_TEMPERATURE_K } from '../../shared/astro/stellar';
 import { JumpLinkRenderer } from './jump-link-renderer';
@@ -38,7 +39,10 @@ const PROXIMA: StarRecord = { id: 42, name: 'Proxima Centauri', x: 0, y: 1.3, z:
 const ANTARES: StarRecord = { id: 80519, name: 'Antares', x: -58.54, y: -140.31, z: -75.57, magnitude: 1.06, magnitudeBand: 'V', spectralType: 'M1Ib + B2.5V', colorIndex: 1.865, colorSystem: 'B-V' };
 const PROCYON_B: StarRecord = { id: 37279, name: 'Gl 280B', x: -1.08, y: 3.19, z: 0.34, magnitude: 10.7, magnitudeBand: 'V', spectralType: 'DA', colorIndex: null };
 
-const STARS: StarRecord[] = [SUN, ALPHA_CENTAURI, PROXIMA, ANTARES, PROCYON_B];
+// A host only the archive places, at the stand-in magnitude, with no type and no colour.
+const LENS: StarRecord = { id: 1070000536, name: 'KMT-2016-BLG-1107L', x: 6651, y: 0, z: 0, magnitude: 15, spectralType: 'Unknown', colorIndex: null, source: 'exoplanet-archive' };
+
+const STARS: StarRecord[] = [SUN, ALPHA_CENTAURI, PROXIMA, ANTARES, PROCYON_B, LENS];
 const STAR_POSITIONS = new Float32Array(STARS.flatMap((star) => [star.x, star.y, star.z]));
 
 // Proxima's planet as the archive gives it, with its host's radius, temperature and luminosity.
@@ -290,7 +294,7 @@ describe('GalaxySystemSceneComponent camera-flight transitions', () => {
       const [focus] = refocus.mock.calls[0];
       expect(focus.view).toBeDefined();
       // The Sun has Earth and Proxima its b, so both are hosts; the others have nothing catalogued.
-      expect(Array.from(focus.hosts ?? [])).toEqual([1, 0, 1, 0, 0]);
+      expect(Array.from(focus.hosts ?? [])).toEqual([1, 0, 1, 0, 0, 0]);
     });
 
     it('chooses again once the camera has turned half the margin, and not for less', async () => {
@@ -951,6 +955,24 @@ describe('GalaxySystemSceneComponent camera-flight transitions', () => {
     expect(navigationStore.viewLevel()).toBe('galactic');
   });
 
+  it('names what the neighbourhood holds, and where the positions of the stars in it come from', async () => {
+    await advanceFrames(engine, 0.3);
+    const component = fixture.componentInstance as unknown as { hudSubtitle(): string; hudNote(): string };
+    expect(component.hudSubtitle()).toBe(catalogueCensus(STARS));
+    expect(component.hudNote()).toBe(positionsNote(STARS));
+    expect(component.hudNote()).toContain('1 planet hosts only the NASA Exoplanet Archive places, from its distances');
+  });
+
+  it('offers a star for a route by its classification, and a star with none by its name alone', () => {
+    const component = fixture.componentInstance as unknown as { starSearchIndex(): { entry: { starId?: number; subtitle: string } }[]; currentStarOption(): { subtitle: string } | null };
+    expect(component.starSearchIndex().find(({ entry }) => entry.starId === LENS.id)?.entry.subtitle).toBe('');
+    expect(component.starSearchIndex().find(({ entry }) => entry.starId === PROXIMA.id)?.entry.subtitle).toBe('M5V');
+    navigationStore.selectStar(LENS.id);
+    expect(component.currentStarOption()?.subtitle).toBe('');
+    navigationStore.selectStar(PROXIMA.id);
+    expect(component.currentStarOption()?.subtitle).toBe('M5V');
+  });
+
   describe('each star at its own size and in its own colour', () => {
     type DrawnStar = {
       starMarkerGeometry: THREE.SphereGeometry;