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

examples/org-chart/verify-p2.mjs

@@ -1,3 +1,4 @@
+import { loadPlaywright, launchChromium } from '../../scripts/orgchart-browser-runtime.mjs';
 import http from 'node:http';
 import path from 'node:path';
 import { readFile, mkdir, writeFile } from 'node:fs/promises';
@@ -14,8 +15,7 @@ const fixturePath = path.join(root, 'examples/org-chart/data-p1.json');
 const fixtureBytes = await readFile(fixturePath);
 const fixtureHash = createHash('sha256').update(fixtureBytes).digest('hex');
 const fixture = JSON.parse(fixtureBytes.toString('utf8'));
-const bundledPlaywright = 'C:\\Users\\user\\.cache\\codex-runtimes\\codex-primary-runtime\\dependencies\\node\\node_modules\\playwright\\index.mjs';
-const { chromium } = await import(pathToFileURL(process.env.ORGCHART_PLAYWRIGHT_MODULE ?? bundledPlaywright).href);
+await loadPlaywright();
 const viewports = [{ width: 1920, height: 1080 }, { width: 1440, height: 900 }, { width: 1280, height: 800 }, { width: 768, height: 1024 }, { width: 390, height: 844 }];
 const expectedArrows = [[194.15, 311.75, 66.25, 19.8], [430.4, 311.75, 66.25, 19.8], [666.65, 302, 183.75, 42], [1044, 302, 258.92, 42], [1520.55, 305, 135.35, 36]];
 const results = [], measurements = [], errors = [], screenshots = [], servers = [];
@@ -275,7 +275,7 @@ let browser;
 try {
   const [htmlOrigin, reactOrigin] = await Promise.all([serve(path.join(root, 'examples/org-chart/dist')), serve(path.join(root, 'examples/org-chart-react/dist'))]);
   const storybookOrigin = process.env.ORGCHART_STORYBOOK_URL?.replace(/\/$/, '') ?? await serve(path.join(root, 'storybook-static'));
-  browser = await chromium.launch({ executablePath: process.env.ORGCHART_CHROME ?? 'C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe', headless: true });
+  browser = await launchChromium({ headless: true });
   const context = await browser.newContext({ deviceScaleFactor: 1, reducedMotion: 'reduce' });
   const routes = [
     { label: 'html', transport: 'html', url: `${htmlOrigin}/p1.html?mode=readOnly` },