### Steps to reproduce

1. Go to Administration -> Billing

2. Compare the breadcumb, the page header and the menu structure

1. Breadcrumb: Administration -> Subscription

2. Navigation: Administration -> Billing

3. Page header: Payment options


### What is the buggy behavior?

* The breadcrumb matchs neither the actual navigational structure nor the page header


<img class="image_resized op-uc-image op-uc-image_inline" style="width:354px;" src="/api/v3/attachments/115919/content">

### What is the expected behavior?

* Begin of the insertionIn agreement with product, we decided to

* name the sidebar menu entry `Subscription`

* End of the insertion The Begin of the insertion`new` route,End of the insertion Begin of the deletion PageHeader andEnd of the deletion the Begin of the insertiontitle is `Billing` with the lastEnd of the insertion breadcrumb Begin of the insertionelement: `Subscription: **Billing**`

* OnEnd of the insertion Begin of the deletion should read &quot;Billing&quot;, accepted byEnd of the deletion the Begin of the insertion`index` route, the title is simply `Subscription`

End of the insertion Begin of the deletion product team

End of the deletion * Technial acceptance: Introduce Primer::OpenProject::PageHeaders to solve this.


### Environment information

**OpenProject version**

_14.3_

**Browser**

* [x] Chrome
* [x] Firefox
* [x] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Language**

_German_