Fix the follow-up review findings in import, layers, startup and engines

- KML/KMZ import: a per-file canvas budget and cache for ground overlays,
  limits on rings and vertices of raised polygons, overlays across 360° and
  near the poles, degenerate holes, polar and single-latitude fills,
  absolute overlays at their altitude, overlay order by drawOrder as on
  Cesium, and pins on tiles keep their measured height.
- Points on the surface: OSM Places and Street Level cones share the
  surface sampler and sit on the terrain before they are measured, within
  a sampling budget per pass; Cockpit's contact-dot bank keeps the dot
  atlas, and a failed fleet model loads again after a pause.
- Startup: the loading screen lifts after the share-link view is restored,
  the retry screen names the failed engine and takes focus, and the
  fallback toast stays for 6 s.
- Engines: an engine switch lands a running camera flight at its
  destination (camera.completeFlight on both engines), the sighting card
  leaves focus on the engine picker after a switch, and a Cesium model
  error stays with the instance that failed.
- The MCP panel builds again: its wind-mesh alias resolves to the stub.
- QA: the wildlife switch waits for the camera to rest, GBFS --w2 says it
  needs the dev server, and test fixtures are shared instead of copied.

build/panel.js

@@ -30,7 +30,7 @@ export function panelBuildConfig(config) {
         // The panel runs Cesium: the Navara mode and Navara's wind mesh
         // (the panel's only paths to Navara and three) become stubs.
         {
-          find: /^(?:\.\/|.*\/app\/)navaraMode\.js$|\/globe\/navara\/windFlowMesh\.js$/,
+          find: /^(?:\.\/|.*\/app\/)navaraMode\.js$|^.*\/globe\/navara\/windFlowMesh\.js$/,
           replacement: fileURLToPath(
             new URL('./panelNavara.js', import.meta.url),
           ),

build/panelAlias.test.mjs

@@ -0,0 +1,45 @@
+// A Vite build through the panel alias resolves renderers.js's relative
+// import of Navara's wind mesh to the stub (scripts/build-panel.mjs uses the
+// same alias).
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { mkdtempSync, mkdirSync, rmSync, writeFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import { build } from 'vite';
+import { panelBuildConfig } from './panel.js';
+
+test('a Vite build resolves the relative wind-mesh import through the panel alias', async (t) => {
+  const root = mkdtempSync(join(tmpdir(), 'panel-alias-'));
+  t.after(() => rmSync(root, { recursive: true, force: true }));
+  mkdirSync(join(root, 'src/app/layers'), { recursive: true });
+  mkdirSync(join(root, 'src/globe/navara'), { recursive: true });
+  writeFileSync(
+    join(root, 'src/app/layers/renderers.js'),
+    "export const load = () => import('../../globe/navara/windFlowMesh.js');\n",
+  );
+  writeFileSync(
+    join(root, 'src/globe/navara/windFlowMesh.js'),
+    'export const real = true;\n',
+  );
+  const { resolve } = panelBuildConfig({ plugins: [] });
+  const [output] = await build({
+    configFile: false,
+    root,
+    logLevel: 'silent',
+    resolve,
+    build: {
+      outDir: join(root, 'out'),
+      write: false,
+      lib: {
+        entry: join(root, 'src/app/layers/renderers.js'),
+        formats: ['es'],
+        fileName: 'x',
+      },
+      rollupOptions: { output: { inlineDynamicImports: true } },
+    },
+  });
+  const [chunk] = output.output;
+  assert.match(chunk.code, /Navara is unavailable in the panel/);
+  assert.doesNotMatch(chunk.code, /real = true/);
+});

build/panelResources.test.mjs

@@ -27,7 +27,10 @@ test('the panel replaces Navara entry points and retains browser aliases', () =>
   );
   assert.ok(alias.replacement.endsWith('/build/panelNavara.js'));
   // Navara's wind mesh imports three; the Cesium wind backend stays.
-  assert.ok(alias.find.test('../../globe/navara/windFlowMesh.js'));
+  assert.equal(
+    '../../globe/navara/windFlowMesh.js'.replace(alias.find, alias.replacement),
+    alias.replacement,
+  );
   assert.equal(alias.find.test('../../globe/cesium/windFlow.js'), false);
   assert.ok(config.resolve.alias.includes(browser.resolve.alias[0]));
 });