diff --git a/src/app/features/body-detail/body-detail-scene.component.ts b/src/app/features/body-detail/body-detail-scene.component.ts
index bf4bcb5..3ef681a 100644
--- a/src/app/features/body-detail/body-detail-scene.component.ts
+++ b/src/app/features/body-detail/body-detail-scene.component.ts
@@ -271,7 +271,6 @@ export class BodyDetailSceneComponent implements AfterViewInit, OnDestroy {
     scene.add(sunLight);
 
     const geometry = new THREE.SphereGeometry(1, 64, 48);
-    const viewModel = this.viewModel();
     this.planetMaterial = new THREE.MeshStandardMaterial({
       // White, always: the map that arrives a moment later carries the colour, whether it is a
       // photograph or a surface derived from the body's own measurements.
diff --git a/src/app/features/galaxy-system/galaxy-system-scene.component.spec.ts b/src/app/features/galaxy-system/galaxy-system-scene.component.spec.ts
index e470776..73fc83a 100644
--- a/src/app/features/galaxy-system/galaxy-system-scene.component.spec.ts
+++ b/src/app/features/galaxy-system/galaxy-system-scene.component.spec.ts
@@ -604,7 +604,7 @@ describe('GalaxySystemSceneComponent camera-flight transitions', () => {
     }
 
     it('links the stars being drawn, and asks again once a new set of them holds still', async () => {
-      const links = vi.fn((_rangePc: number, _drawn: Uint32Array) => Promise.resolve(new Float32Array(0)));
+      const links = vi.fn<LinkScene['routing']['links']>(() => Promise.resolve(new Float32Array(0)));
       const component = linkScene(links);
       await settle();
       expect(links).toHaveBeenCalledTimes(1);
@@ -625,7 +625,7 @@ describe('GalaxySystemSceneComponent camera-flight transitions', () => {
     });
 
     it('asks for as much of the graph as a million pixels of line make, around where the view is centred', async () => {
-      const links = vi.fn((_rangePc: number, _drawn: Uint32Array, _budget?: LinkBudget) => Promise.resolve(new Float32Array(0)));
+      const links = vi.fn<LinkScene['routing']['links']>(() => Promise.resolve(new Float32Array(0)));
       Object.defineProperty((fixture.nativeElement as HTMLElement).querySelector('canvas')!, 'clientHeight', { value: 1080 });
       // A screen scaled to 200%: 1080 CSS pixels are 2160 drawn ones, and the lines are drawn in those.
       engine.pixelRatio = 2;
@@ -641,7 +641,7 @@ describe('GalaxySystemSceneComponent camera-flight transitions', () => {
 
     it('asks again once the view has zoomed past the budget it asked with, though the drawn stars are the same', async () => {
       // All three stars fit the star budget, so the drawn set never changes: only the budget can.
-      const links = vi.fn((_rangePc: number, _drawn: Uint32Array, _budget?: LinkBudget) => Promise.resolve(new Float32Array(0)));
+      const links = vi.fn<LinkScene['routing']['links']>(() => Promise.resolve(new Float32Array(0)));
       Object.defineProperty((fixture.nativeElement as HTMLElement).querySelector('canvas')!, 'clientHeight', { value: 1080 });
       const component = linkScene(links);
       await advanceFrames(engine, 0.3);
@@ -658,7 +658,7 @@ describe('GalaxySystemSceneComponent camera-flight transitions', () => {
     });
 
     it('asks for no graph from inside a system, where distances are in astronomical units', async () => {
-      const links = vi.fn((_rangePc: number, _drawn: Uint32Array, _budget?: LinkBudget) => Promise.resolve(new Float32Array(0)));
+      const links = vi.fn<LinkScene['routing']['links']>(() => Promise.resolve(new Float32Array(0)));
       navigationStore.selectStar(SUN.id);
       await flushAsync();
       await advanceFrames(engine, 2.5);
@@ -695,7 +695,7 @@ describe('GalaxySystemSceneComponent camera-flight transitions', () => {
     });
 
     it('gives a view on the move a new graph at least every quarter second, rather than waiting for it to stop', async () => {
-      const links = vi.fn((_rangePc: number, _drawn: Uint32Array) => Promise.resolve(new Float32Array(0)));
+      const links = vi.fn<LinkScene['routing']['links']>(() => Promise.resolve(new Float32Array(0)));
       const component = linkScene(links);
       await settle();
 
diff --git a/src/app/features/galaxy-system/galaxy-system-scene.component.ts b/src/app/features/galaxy-system/galaxy-system-scene.component.ts
index 05bf8ad..1ecc13e 100644
--- a/src/app/features/galaxy-system/galaxy-system-scene.component.ts
+++ b/src/app/features/galaxy-system/galaxy-system-scene.component.ts
@@ -484,7 +484,7 @@ export class GalaxySystemSceneComponent implements AfterViewInit, OnDestroy {
     // Reads both signals, so flipping the layer on and dragging the range each land here.
     effect(() => {
       this.jumpRangePc();
-      this.display().jumpLinks;
+      void this.display().jumpLinks;
       this.scheduleJumpLinks();
     });
   }
@@ -1804,8 +1804,6 @@ export class GalaxySystemSceneComponent implements AfterViewInit, OnDestroy {
   }
 
   private swapToSystemSpace(star: StarRecord, direction: THREE.Vector3, onComplete: () => void): void {
-    const camera = this.engine.getCamera();
-
     this.systemRenderer?.dispose();
     if (this.starMarker) {
       this.systemGroup.remove(this.starMarker);
@@ -1912,7 +1910,6 @@ export class GalaxySystemSceneComponent implements AfterViewInit, OnDestroy {
   }
 
   private swapToGalaxySpace(exitingStarId: number, direction: THREE.Vector3, isSwitchingSystems: boolean, onComplete: () => void): void {
-    const camera = this.engine.getCamera();
     const star = this.starsById.get(exitingStarId);
     const starPc = star ? new THREE.Vector3(star.x, star.y, star.z) : GALAXY_OVERVIEW_TARGET.clone();
 
diff --git a/src/app/features/galaxy-system/grid-plane.ts b/src/app/features/galaxy-system/grid-plane.ts
index 687c758..7794783 100644
--- a/src/app/features/galaxy-system/grid-plane.ts
+++ b/src/app/features/galaxy-system/grid-plane.ts
@@ -1,6 +1,6 @@
 import * as THREE from 'three/webgpu';
 
-import { GALACTIC_BASIS_EQUATORIAL, SUN_HEIGHT_ABOVE_MIDPLANE_PC } from '../../shared/astro/galaxy';
+import { GALACTIC_BASIS_EQUATORIAL } from '../../shared/astro/galaxy';
 
 const SEGMENTS_PER_RING = 180;
 
diff --git a/src/app/features/galaxy-system/milky-way-model.ts b/src/app/features/galaxy-system/milky-way-model.ts
index c90a45f..cfde7be 100644
--- a/src/app/features/galaxy-system/milky-way-model.ts
+++ b/src/app/features/galaxy-system/milky-way-model.ts
@@ -87,9 +87,9 @@ export function createRandom(seed: number): () => number {
 
 /** Standard normal sample, by the polar form of Box-Muller. */
 function gaussian(random: () => number): number {
-  let u = 0;
-  let v = 0;
-  let s = 0;
+  let u: number;
+  let v: number;
+  let s: number;
   do {
     u = random() * 2 - 1;
     v = random() * 2 - 1;
diff --git a/src/app/features/galaxy-system/star-field-renderer.ts b/src/app/features/galaxy-system/star-field-renderer.ts
index 4014bf6..b86f345 100644
--- a/src/app/features/galaxy-system/star-field-renderer.ts
+++ b/src/app/features/galaxy-system/star-field-renderer.ts
@@ -5,7 +5,7 @@ import { BrightnessIndex, brightnessIndex, Positioned } from '../../shared/astro
 import { spectralTypeToColorIndex } from '../../shared/astro/spectral';
 import { SceneCamera } from '../../core/engine/engine.service';
 import { StarRecord } from '../../shared/models/star.model';
-import { PIXELS_TO_ANGULAR_SIZE, REFERENCE_FOV_DEGREES, REFERENCE_VIEWPORT_HEIGHT_PX } from './angular-size';
+import { PIXELS_TO_ANGULAR_SIZE, REFERENCE_FOV_DEGREES } from './angular-size';
 
 /** Apparent star diameters, in pixels at {@link REFERENCE_VIEWPORT_HEIGHT_PX}. */
 const MIN_POINT_SIZE = 1.5;
diff --git a/src/app/shared/state/bookmarks.store.ts b/src/app/shared/state/bookmarks.store.ts
index 704e28d..8e64306 100644
--- a/src/app/shared/state/bookmarks.store.ts
+++ b/src/app/shared/state/bookmarks.store.ts
@@ -82,7 +82,7 @@ export class BookmarksStore {
   }
 
   private read(): Bookmark[] {
-    let raw: string | null = null;
+    let raw: string | null;
     try {
       raw = localStorage.getItem(STORAGE_KEY);
     } catch {