chore: remove the remaining unused local bindings

An ESLint no-unused-vars scan over src, server, scripts, tools, build
and pinokio, repeated until it is stable, reported these.

Runtime modules keep every call and drop only the unread binding:
- src/ui/cockpitInput.js: the unread result of enter()/exit().
- src/layers/launches/rendering.js: the unread entity returned by
  entities.add().
- src/layers/radio/rendering.js: the unread map key in the horizon scan,
  which now iterates the map's values.

QA scripts and tools drop an unused helper, two unused in-page module
imports, unused counters and destructured fields, and an unread wait
result. Tests drop source files read into variables that no assertion
uses, redundant StyleManager imports (the shell-source helper already
imports it), and unused destructured fields.

The one remaining report is the `_` loop variable in src/tools/schema.js,
which counts iterations and is intentional.

tools/streetview-panorama.mjs

@@ -157,7 +157,7 @@ async function fetchTile(apiKey, session, panoId, z, x, y) {
 // ---------------------------------------------------------------------------
 
 async function stitchPanorama(apiKey, session, panoId, metadata, zoom) {
-  const { imageWidth, imageHeight, tileWidth, tileHeight } = metadata;
+  const { tileWidth, tileHeight } = metadata;
 
   // Street View tile grids follow a fixed power-of-2 scheme:
   //   zoom 0: 1×1    (360° FOV, entire panorama in one tile)