fix(org-chart): improve auto connector contrast and test portability

scripts/orgchart-browser-runtime.mjs

@@ -0,0 +1,37 @@
+import path from 'node:path';
+import { pathToFileURL } from 'node:url';
+
+let playwrightPromise;
+
+// Resolve project dependencies normally; an external installation is optional.
+export async function loadPlaywright() {
+  playwrightPromise ??= (async () => {
+    const modulePath = process.env.ORGCHART_PLAYWRIGHT_MODULE?.trim();
+    try {
+      const runtime = await import(modulePath ? pathToFileURL(path.resolve(modulePath)).href : 'playwright');
+      if (typeof runtime.chromium?.launch !== 'function') throw new Error('Module does not export chromium.launch');
+      return runtime;
+    } catch (cause) {
+      throw new Error(
+        `OrgChart browser verification cannot load Playwright (${modulePath || 'project module: playwright'}). ` +
+        'Use an existing project Playwright installation, or set ORGCHART_PLAYWRIGHT_MODULE to an existing Playwright entry file.',
+        { cause },
+      );
+    }
+  })();
+  return playwrightPromise;
+}
+
+export async function launchChromium(options = {}) {
+  const { chromium } = await loadPlaywright();
+  const executablePath = process.env.ORGCHART_CHROME?.trim();
+  try {
+    return await chromium.launch({ ...options, ...(executablePath ? { executablePath: path.resolve(executablePath) } : {}) });
+  } catch (cause) {
+    throw new Error(
+      `OrgChart browser verification cannot launch Chromium (${executablePath || 'Playwright-managed browser'}). ` +
+      'Ensure this Playwright installation has its Chromium browser, or set ORGCHART_CHROME to an existing browser executable.',
+      { cause },
+    );
+  }
+}