feat(content): add products, services and legal pages

- Add /products/, covering the one product actually in service. It is
  written to match reality rather than padded out to look like a matrix.
- Add /services/, describing the work taken on and, deliberately, the
  work that is not a good fit.
- Add the privacy policy and terms, linked from the footer. Both describe
  what the site actually does — no cookies, no analytics — and carry
  TODO notes for the parts needing legal review.

docs/en-gb/legal/privacy.md

@@ -0,0 +1,86 @@
+---
+title: Privacy Policy
+description: How Changsha Onix Byte Technology Co., Ltd handles personal information on this website and in the tools we publish.
+sidebar: false
+outline: false
+---
+
+<!-- TODO(legal): reviewed for factual accuracy against the actual build (no
+cookies, no analytics, two localStorage keys), but it has not been reviewed by
+a lawyer. Have it checked before relying on it. -->
+
+**Last updated: 25 September 2026.**
+
+This policy covers this website and the tools we publish under it. It is issued
+by Changsha Onix Byte Technology Co., Ltd ("we", "us"), the operator of
+onixbyte.com and onixbyte.cn.
+
+## What we collect
+
+Almost nothing.
+
+There is no account to create, no newsletter to sign up for and no form to
+submit. We do not run analytics, advertising or tracking scripts of any kind,
+and we do not build profiles of visitors.
+
+We do not ask for your name, email address, phone number or any other personal
+information, and there is nowhere on this site to give it to us.
+
+## Tools that run in your browser
+
+The tools we publish, including Dev Lab, run entirely in your browser. Data you
+paste into them — configuration files, API responses, anything else — is
+processed on your own machine and is never transmitted to us or to anyone else.
+There is no upload step, and no code in those tools that could perform one.
+
+This is a deliberate design decision. We use these tools on real data
+ourselves, and a tool that sends your data somewhere is a tool we would not be
+able to use.
+
+## Local storage, and no cookies
+
+We do not set cookies.
+
+The site does store two small pieces of information in your browser's local
+storage. Both stay on your device, and neither is readable by us:
+
+| Key                        | What it holds                                     |
+| -------------------------- | ------------------------------------------------- |
+| `rspress-theme-appearance` | Whether you chose the light or dark theme         |
+| `rspress-visited`          | A flag so the language redirect only happens once |
+
+Clearing your browser's site data removes both, and the site continues to work
+without them.
+
+## Server logs
+
+Like any web server, the hosts that serve this site may record standard access
+logs — IP address, browser user agent, and the page requested — for security and
+troubleshooting. These are not used to identify or profile individuals, and we
+do not combine them with any other information.
+
+<!-- TODO(legal): confirm your actual log retention period on both hosts
+(Vercel and the onixbyte.cn server) and state it here. -->
+
+## Your rights
+
+Because we do not hold personal information about you, there is generally
+nothing for us to show, correct or delete. If you believe we hold something
+about you, write to us and we will look into it.
+
+If you are in a jurisdiction that grants you rights over your personal data,
+those rights are not affected by anything in this policy.
+
+## Contact
+
+Questions about this policy, or about how we handle data:
+
+**business@onixbyte.com**
+
+Changsha Onix Byte Technology Co., Ltd
+Hunan Province, China
+
+## Changes to this policy
+
+If we start collecting something, this page will say so before we do it. The
+date at the top shows when it was last changed.