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

examples/org-chart/verify-p3.1.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 fs from 'node:fs/promises';
@@ -9,7 +10,7 @@ const root = fileURLToPath(new URL('../../', import.meta.url));
 const output = path.join(root, 'test-results/org-chart-p3.1');
 const fixtureBytes = await fs.readFile(path.join(root, 'examples/org-chart/data-p1.json'));
 const fixture = JSON.parse(fixtureBytes);
-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);
+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 results = [], measurements = [], fontEvidence = [], errors = [], servers = [];
 const check = (pass, name, detail) => results.push({ name, status: pass ? 'PASS' : 'FAIL', ...(detail === undefined ? {} : { detail }) });
@@ -139,7 +140,7 @@ let browser;
 try {
   const htmlOrigin = await serve(path.join(root,'examples/org-chart/dist'));
   const reactOrigin = await serve(path.join(root,'examples/org-chart-react/dist'));
-  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();
   const routes = [{name:'html',url:`${htmlOrigin}/p1.html?mode=readOnly`},{name:'file-classic',url:pathToFileURL(path.join(root,'examples/org-chart/dist/p1-classic.html')).href+'?mode=readOnly'},{name:'react',url:`${reactOrigin}/p1.html?mode=readOnly`},{name:'storybook',url:'http://127.0.0.1:6041/iframe.html?id=orgchart--full-composition&viewMode=story'}];
   for(const route of routes) {