updats on the dispatch page

tools/css-hooks.mjs

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+/**
+ * Make `import './thing.css'` a no-op under the Node test runner.
+ *
+ * Vite turns a CSS import into a side effect that injects a stylesheet; Node
+ * has no such notion and refuses the file outright with
+ * ERR_UNKNOWN_FILE_EXTENSION. That is fine for the pure tests, which never
+ * import a component — but the map has to be MOUNTED to be tested at all, and
+ * leaflet's own stylesheet comes with it.
+ *
+ * Styling is not what those tests check. They count polylines and markers in
+ * the document, which leaflet creates regardless of whether any CSS loaded. So
+ * every `.css` specifier resolves to an empty module and the import vanishes.
+ */
+export function resolve(specifier, context, next) {
+  if (specifier.endsWith('.css')) {
+    return { url: 'data:text/javascript,export default {}', shortCircuit: true };
+  }
+  return next(specifier, context);
+}

tools/stub-css.mjs

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+/**
+ * Registers the CSS stub for the test runner.
+ *
+ * Loaded with `node --import`, which has to happen before any test module is
+ * evaluated — a hook registered later cannot intercept an import that has
+ * already been resolved.
+ */
+import { register } from 'node:module';
+register('./css-hooks.mjs', import.meta.url);