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

examples/org-chart/verify-p5-1a.mjs

@@ -1,15 +1,15 @@
+import { loadPlaywright, launchChromium } from '../../scripts/orgchart-browser-runtime.mjs';
 import http from 'node:http';
 import path from 'node:path';
 import fs from 'node:fs/promises';
-import { fileURLToPath, pathToFileURL } from 'node:url';
+import { fileURLToPath } from 'node:url';
 
 // P5-1A only: preserve previous suites and the baseline-files.json snapshot.
 // Copy the pre-change public Core dist to baseline-dist before rebuilding.
 const root = fileURLToPath(new URL('../../', import.meta.url));
 const output = path.join(root, 'test-results/org-chart-p5-1a');
 const storyOrigin = process.env.ORGCHART_STORY_ORIGIN ?? 'http://127.0.0.1:6052';
-const { chromium } = await import(pathToFileURL(process.env.ORGCHART_PLAYWRIGHT_MODULE
-  ?? 'C:/Users/user/.cache/codex-runtimes/codex-primary-runtime/dependencies/node/node_modules/playwright/index.mjs').href);
+const { chromium } = await loadPlaywright();
 const fixedFixture = JSON.parse(await fs.readFile(path.join(root, 'examples/org-chart/data-p1.json'), 'utf8'));
 const expandedFixture = JSON.parse(await fs.readFile(path.join(root, 'examples/org-chart/data-expanded.json'), 'utf8'));
 const presets = [
@@ -44,7 +44,7 @@ const server = http.createServer(async (request, response) => {
 });
 await new Promise(resolve => server.listen(0, '127.0.0.1', resolve));
 const origin = `http://127.0.0.1:${server.address().port}`;
-const browser = await chromium.launch({ executablePath: process.env.ORGCHART_CHROME ?? 'C:/Program Files/Google/Chrome/Application/chrome.exe', headless: true });
+const browser = await launchChromium({ headless: true });
 
 async function newPage(name, viewport = { width: 1440, height: 900 }) {
   const page = await browser.newPage({ viewport });