fix: redirect root path to default locale

[nb-sb]

fix issues: #32 README中web模块说明不足，默认页面404

• Add root page.tsx that redirects / to /en
• Fixes 404 when accessing http://localhost:3000

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[Copilot]

Pull request overview

Adds an App Router root page to redirect / to the default locale route, addressing the reported 404 when visiting http://localhost:3000 directly.

Changes:

• Added web/src/app/page.tsx to redirect / → /en.

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[Copilot]

The redirect target is hard-coded to "/en" here, while the supported locales are also defined elsewhere (e.g., in app/[locale]/layout.tsx and lib/i18n-server.ts). This can drift over time if the default locale changes. Consider introducing a shared DEFAULT_LOCALE (and possibly LOCALES) constant in a common module and importing it here (and from the other locale lists) so there’s a single source of truth.

Suggested change

	export default function RootPage() {
	redirect("/en");
	const DEFAULT_LOCALE = process.env.NEXT_PUBLIC_DEFAULT_LOCALE || "en";
	export default function RootPage() {
	redirect(`/${DEFAULT_LOCALE}`);

[Copilot]

The PR description mentions that the README’s web-module instructions are insufficient, but this PR only adds a root redirect and does not update any README/docs. Either update the README as part of this PR or adjust the PR title/description to reflect the actual scope (root-path redirect only).

[CrazyBoyM]

Correction: This PR was automatically closed by GitHub when we force-pushed after a git filter-repo operation. It was not reviewed and intentionally closed. Apologies.

The root redirect fix is a valid improvement -- localhost:3000 returning 404 is a real UX issue. We'll implement this and credit you. Thanks!

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更正：这个 PR 是 git filter-repo 后 force push 时被 GitHub 自动关闭的。根路径重定向是有效的改进，我们会实现并注明贡献者。

[CrazyBoyM]

Root redirect is now live in commit 14c7228. Credited in the commit message. Thanks again!

根路径重定向已合并，commit message 中注明了贡献者。