docs: translate gitlab-ops to en-gb, enhance gravatar article, fix heading levels

- Translate GitLab Operations article from Chinese to British English
- Add comprehensive Gravatar usage guide with code examples in both locales
- Fix heading levels on notification pages (h1 -> h2)
- Enable line numbers in code blocks via rspress config

docs/en-gb/blog/contents/gitlab-ops.md

@@ -0,0 +1,50 @@
+---
+title: GitLab Operations
+---
+
+## Setting the Default Language to Chinese in GitLab
+
+GitLab filters out languages with less than 90% translation coverage via the `SWITCHER_MINIMUM_TRANSLATION_LEVEL` variable in the code. Simplified Chinese sits at 84% and Traditional Chinese at 83%.
+
+Navigate to `/path/to/gitlab/embedded/service/gitlab-rails/app/helpers/preferred_language_switcher_helper.rb` and modify the code as follows:
+
+```diff title="/path/to/gitlab/embedded/service/gitlab-rails/app/helpers/preferred_language_switcher_helper.rb" 
+- SWITCHER_MINIMUM_TRANSLATION_LEVEL = 90
++ SWITCHER_MINIMUM_TRANSLATION_LEVEL = 80
+```
+
+Then restart GitLab with `gitlab-ctl restart`.
+
+## Adding ICP Filing Information to the Homepage
+
+Navigate to `/path/to/gitlab/embedded/service/gitlab-rails/app/views/devise/shared/_footer.html.haml` and add the following:
+
+```diff
++ = link_to _("Your ICP Filing Number"), "https://beian.miit.gov.cn/", target: '_blank', class: 'text-nowrap', rel: 'noopener noreferrer'
+```
+
+## Upgrading GitLab
+
+### Downloading the GitLab CE Package
+
+Download the deb package from the [GitLab Package page](https://packages.gitlab.com/gitlab/gitlab-ce) and transfer it to the server using `scp` or a similar tool.
+
+### Stopping Memory-Intensive Services
+
+```shell
+gitlab-ctl stop puma
+gitlab-ctl stop sidekiq
+```
+
+### Running a Backup
+
+```shell
+# Example: skip build artefacts and container registry, backing up only the database and repositories
+sudo gitlab-backup create SKIP=artifacts,registry
+```
+
+### Installing
+
+```shell
+sudo dpkg -i gitlab-package.deb
+```

docs/en-gb/blog/contents/use-of-gravatar.md

@@ -2,4 +2,78 @@
 title: Use Gravatar in First-party Systems
 ---
 
-Insert a `<img src="https://gravatar.com/avatar/$SHA256(email)/?d=identicon">`.
+[Gravatar](https://gravatar.com) (Globally Recognised Avatar) is a service that associates avatar images with email
+addresses. When a user registers on your platform with their email, you can display their Gravatar as a default avatar
+without building your own image upload and storage pipeline.
+
+## How It Works
+
+Gravatar exposes a simple HTTP endpoint. You compute the SHA256 hash of the user's **lowercased and trimmed** email
+address, then embed it in an image URL:
+
+```
+https://gravatar.com/avatar/<hash>
+```
+
+## Generating the Hash
+
+### Node.js
+
+```js
+import { createHash } from "node:crypto";
+
+const email = "user@example.com".trim().toLowerCase();
+const hash = createHash("sha256").update(email).digest("hex");
+const url = `https://gravatar.com/avatar/${hash}`;
+```
+
+### Python
+
+```python
+import hashlib
+
+email = "user@example.com".strip().lower()
+hash = hashlib.sha256(email.encode()).hexdigest()
+url = f"https://gravatar.com/avatar/{hash}"
+```
+
+### Shell
+
+```shell
+echo -n "user@example.com" | tr '[:upper:]' '[:lower:]' | sha256sum | cut -d ' ' -f1
+```
+
+## URL Parameters
+
+The `/avatar/` endpoint accepts several query parameters to customise the result:
+
+| Parameter | Description                             | Example        |
+|-----------|-----------------------------------------|----------------|
+| `s`       | Size in pixels (default: 80)            | `?s=200`       |
+| `d`       | Default image when no Gravatar is found | `?d=identicon` |
+| `r`       | Content rating (`g`, `pg`, `r`, `x`)    | `?r=g`         |
+
+### Default Image Options (`d`)
+
+- `identicon` — a geometric pattern based on the hash
+- `robohash` — a generated robot image
+- `retro` — an 8-bit style pixelated face
+- `monsterid` — a generated monster cartoon
+- `wavatar` — a generated face
+- `mp` — a generic silhouette (Mystery Person)
+- `blank` — a transparent PNG
+- A custom URL (must be URL-encoded)
+
+### Putting It Together
+
+```html
+<img
+  src="https://gravatar.com/avatar/a3b4c5d6e7f8?s=160&d=robohash&r=g"
+  alt="User avatar"
+  width="160"
+  height="160"
+/>
+```
+
+Always pass the `d` parameter to avoid broken images for users who have not set up a Gravatar. `identicon` and
+`robohash` are popular choices because they generate a unique, recognisable image for every hash.

docs/en-gb/notifications/index.md

@@ -2,7 +2,7 @@
 title: Notifications
 ---
 
-# Microsoft Email Delivery Issues (@outlook, @hotmail, @live, @msn and custom domain emails hosted on Microsoft)
+## Microsoft Email Delivery Issues (@outlook, @hotmail, @live, @msn and custom domain emails hosted on Microsoft)
 
 > Updated at *19 May 2026*.
 
@@ -12,7 +12,7 @@ Please be advised that our automated email service is currently experiencing sev
 
 To ensure uninterrupted service, please follow the guidance below based on your account status:
 
-- For Prospective Users (Before Registration): Please **do not** use a Microsoft-hosted email address to register your account. You will not receive the essential activation link. Kindly use an alternative email service provider, such as your corporate email, QQ Mail, or NetEase (163) Mail to complete your registration.
+- For Prospective Users (Before Registration): Please **do not** use a Microsoft-hosted email address to register your account. You will not receive the essential activation link. Kindly use an alternative email service provider, such as your corporate email, Gmail, etc. to complete your registration.
 - For Existing Registered Users: If your profile is currently linked to an Outlook or Hotmail address, please log in immediately and update your primary email address. You can change this by navigating to your **[User Settings -> Preferences -> Emails](https://git.onixbyte.cn/-/profile/emails)** page. Failing to do so will result in missing critical repository updates, CI/CD pipeline failure logs, and Merge Request notifications.
 
 We are actively working to appeal this block with the Microsoft Postmaster Centre. We sincerely apologise for any inconvenience caused and appreciate your prompt cooperation in updating your contact details.