feat(web): import oh-my-openagent-web Next.js + Cloudflare Workers site

Imports the public marketing site previously living in
../oh-my-opencode-web. Independent of the npm plugin: own package.json,
bun.lock, tsconfig.json. Not included in the published package — root
files: array still only ships dist/, bin/, postinstall.mjs.

Stack:
- Next.js 15.5 App Router + RSC, deployed to Cloudflare Workers via
  @opennextjs/cloudflare (build target .open-next/worker.js).
- Tailwind v4 + shadcn/ui primitives.
- next-intl with 4 locales (en/ja/ko/zh) under app/[locale]/.
- Playwright e2e tests under web/e2e/.
- Custom domains ohmyopenagent.com (primary) and ohmyopencode.org
  (legacy alias) declared in web/wrangler.toml.

Source files were re-formatted via `bun run format` to bring them in
line with the existing .prettierrc (singleQuote: false). Functional code
unchanged.

web/middleware.ts

@@ -0,0 +1,26 @@
+import { NextResponse, type NextRequest } from "next/server"
+import createMiddleware from "next-intl/middleware"
+import { routing } from "./i18n/routing"
+
+const handleI18nRouting = createMiddleware(routing)
+const oldHosts = new Set(["ohmyopencode.org", "www.ohmyopencode.org"])
+const primaryHost = "ohmyopenagent.com"
+
+export default function middleware(request: NextRequest) {
+  const forwardedHost = request.headers.get("x-forwarded-host")
+  const requestHost = request.headers.get("host")
+  const hostname = (forwardedHost ?? requestHost ?? request.nextUrl.hostname).split(":")[0]
+
+  if (hostname && oldHosts.has(hostname)) {
+    const redirectUrl = request.nextUrl.clone()
+    redirectUrl.protocol = "https"
+    redirectUrl.host = primaryHost
+    return NextResponse.redirect(redirectUrl, 308)
+  }
+
+  return handleI18nRouting(request)
+}
+
+export const config = {
+  matcher: ["/", "/((?!api|_next|_vercel|.*\\..*).+)"],
+}