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

examples/org-chart/verify-quality-p1.mjs

@@ -1,14 +1,15 @@
+import { loadPlaywright, launchChromium } from '../../scripts/orgchart-browser-runtime.mjs';
 import http from 'node:http';
 import path from 'node:path';
 import { readFile, writeFile, mkdir } from 'node:fs/promises';
 import { createHash } from 'node:crypto';
-import { fileURLToPath, pathToFileURL } from 'node:url';
+import { fileURLToPath } from 'node:url';
 
 // Quality-only verification. No data/source/lifecycle regression suite is run.
 const root = fileURLToPath(new URL('../../', import.meta.url));
 const output = path.join(root, 'test-results/org-chart-quality');
 await mkdir(output, { recursive: true });
-const { chromium } = await import(process.env.ORGCHART_PLAYWRIGHT_MODULE ? pathToFileURL(process.env.ORGCHART_PLAYWRIGHT_MODULE).href : 'playwright');
+await loadPlaywright();
 const results = [], errors = [], measurements = [], screenshots = [];
 const check = (value, name, detail) => results.push({ name, status: value ? 'PASS' : 'FAIL', ...(detail === undefined ? {} : { detail }) });
 const mime = { '.html': 'text/html', '.js': 'text/javascript', '.css': 'text/css', '.json': 'application/json', '.png': 'image/png', '.ttf': 'font/ttf' };
@@ -108,7 +109,7 @@ let browser;
 const servers = [];
 try {
   for (const directory of ['storybook-static', 'examples/org-chart/dist', 'examples/org-chart-react/dist']) servers.push(await serve(path.join(root, directory)));
-  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({ viewport: { width: 1440, height: 1000 }, deviceScaleFactor: 1, reducedMotion: 'reduce' });
   const canonical = ['logo', 'department-colors', 'position-summary', 'affiliation-summary', 'full-composition'];
   const index = JSON.parse(await readFile(path.join(root, 'storybook-static/index.json'), 'utf8'));