Cut duplicated and dead code across the engines, the layers and the QA scripts

- src/geo drops the ported debug argument checks and the tests that
  bitExact already covers; package boundaries accept a directory entry,
  so src/geo/ is listed once per group.
- Cesium no longer carries movers and lines nobody draws with: they are
  optional engine capabilities. The fake engine and the Cesium camera use
  the shared cameraMath; unused contract tables, clock.ticked, the
  'finest' surface detail and Navara click statistics are gone.
- ALPR keeps one overlay core and one presentation model for both
  engines, bikeshare one station bookkeeping, the Navara ground effects
  one definition helper; image atlases, view centres, mover banks and
  colours are shared.
- The legacy switch route, the clock offset and rate controls and other
  unused exports are removed.
- The acceptance runs the Navara draw, geo import and scope checks;
  scenarios use the harness switch and page helpers; the main chunk
  check keeps the size budget only and runs once in CI.

scripts/qa-browserEvidence.mjs

@@ -45,7 +45,7 @@ export function isExpectedPreviewSetupError(
   }
 }
 
-// W1 acceptance shares one strict runtime verdict across its main page and
+// The runtime evidence gate shares one strict runtime verdict across its main page and
 // every share-link page. Response diagnostics never retain query credentials.
 export function watchW1Page(page, report, { name, preview = false, baseUrl }) {
   const errors = (report.browserErrors ??= []);