Add Conditions to ManifestHeaderApp

[warrenbuckley]

Prerequisites

• I have added steps to test this contribution in the description below

Fixes: #18979

Description

Adds ManifestWithDynamicConditions to ManifestHeaderApp so Header Apps can be conditionally shown/loaded like other Manifest/Extension types.

Test Notes

• Checkout PR
• Verify it builds
• Update or create a new Header App manifest
• Verify Conditions can be added
• Ensure conditions run and load/unload Header App as needed

Add a simple condition such as this to verify that should make a header app only show if in the Settings section

{
  ...
  "conditions": [
    {
      "alias": "Umb.Condition.SectionAlias",
      "match": "Umb.Section.Settings",
    },
  ]
}

[Copilot]

Pull Request Overview

This PR adds dynamic condition support to Header Apps by extending ManifestHeaderApp so that it can handle conditions similarly to other Manifest/Extension types.

• Updated the ManifestHeaderApp interface to extend ManifestWithDynamicConditions with UmbExtensionConditionConfig.
• Modified the import statement accordingly.

Comments suppressed due to low confidence (1)

src/Umbraco.Web.UI.Client/src/packages/core/extension-registry/extensions/header-app.extension.ts:7

• UmbExtensionConditionConfig is used as a generic parameter but it is not imported. Please ensure that UmbExtensionConditionConfig is imported from its appropriate module to avoid compilation errors.

export interface ManifestHeaderApp extends ManifestElement, ManifestWithDynamicConditions<UmbExtensionConditionConfig> {

[madsrasmussen]

Thanks @warrenbuckley, it makes sense, and works as expected!

[warrenbuckley]

@madsrasmussen still shows as open PR here at my end ?! 😕🙃

[madsrasmussen]

@warrenbuckley I forgot to approve 🙈 All good now. I have cherry-picked to v16 to ensure it gets included. Thanks 👍