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

examples/org-chart-react/verify-boundaries.mjs

@@ -1,3 +1,4 @@
+import { loadPlaywright, launchChromium } from '../../scripts/orgchart-browser-runtime.mjs';
 import assert from 'node:assert/strict';
 import http from 'node:http';
 import path from 'node:path';
@@ -5,7 +6,7 @@ import { readFile, writeFile } from 'node:fs/promises';
 import { fileURLToPath, pathToFileURL } from 'node:url';
 
 const root = fileURLToPath(new URL('../../', import.meta.url));
-const { chromium } = await import(process.env.ORGCHART_PLAYWRIGHT_MODULE ? pathToFileURL(process.env.ORGCHART_PLAYWRIGHT_MODULE).href : 'playwright');
+await loadPlaywright();
 const server = http.createServer(async (request, response) => {
   try {
     const url = new URL(request.url, 'http://localhost');
@@ -18,7 +19,7 @@ const server = http.createServer(async (request, response) => {
   } catch { response.writeHead(404).end(); }
 });
 await new Promise(resolve => server.listen(0, '127.0.0.1', resolve));
-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 });
 const results = [], errors = [];
 const check = (condition, name, detail) => { results.push({ name, status: condition ? 'PASS' : 'FAIL', detail }); assert.ok(condition, name); };
 try {