fix(e2e): replace __dirname with import.meta.url in ESM context

[Copilot]

E2E CI fails immediately with ReferenceError: __dirname is not defined in ES module scope because the root package.json sets "type": "module" but mobile-visual-regression.spec.ts uses the CJS-only __dirname global.

• Replace __dirname with the ESM equivalent dirname(fileURLToPath(import.meta.url))

-import { join } from 'path';
+import { dirname, join } from 'path';
+import { fileURLToPath } from 'url';

-const snapshotsDir = join(__dirname, 'mobile-visual-regression.spec.ts-snapshots');
+const snapshotsDir = join(dirname(fileURLToPath(import.meta.url)), 'mobile-visual-regression.spec.ts-snapshots');

Original prompt

引用: https://github.com/objectstack-ai/objectui/actions/runs/22246780952/job/64362623763#step:8:1

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Project	Deployment	Actions	Updated (UTC)
objectui	Ready	Preview, Comment	Feb 21, 2026 1:17am
objectui-demo	Ready	Preview, Comment	Feb 21, 2026 1:17am
objectui-storybook	Ready	Preview, Comment	Feb 21, 2026 1:17am

[Copilot]

Pull request overview

This PR fixes a critical E2E test failure caused by using the CommonJS-only __dirname global in an ES module context. The root package.json sets "type": "module", which makes all .ts/.js files use ESM semantics where __dirname is not defined, causing a ReferenceError during test execution.

Changes:

• Replace __dirname with ESM-compatible dirname(fileURLToPath(import.meta.url)) pattern
• Add required imports (dirname from path, fileURLToPath from url)