Fix custom navbar content display and GitHub icon in ng-doc v19 documentation app

[Copilot]

Problem

The custom navbar content (title and GitHub link) was not displaying in the documentation app after upgrading to ng-doc version 19. The navbar appeared empty where the "Charts-on-FHIR" title and GitHub repository link should have been visible.

Root Cause

ng-doc version 19 introduced breaking changes to:

1. Navbar customization API: The previous implementation used ng-template elements with ngDocNavbarLeft and ngDocNavbarRight directive attributes, which is the v18 syntax. In v19, these directives must be applied directly to the content elements instead of template containers.
2. Icon configuration: Custom icons require explicit configuration of the icons path in the ng-doc app configuration.

Solution

1. Updated navbar template syntax in apps/documentation/src/app/app.component.html:

Before (ng-doc v18 syntax):

<ng-template ngDocNavbarLeft>
  <h3 style="margin: 0">Charts-on-FHIR</h3>
</ng-template>
<ng-template ngDocNavbarRight>
  <div class="ng-doc-header-controls">
    <a ng-doc-button-icon size="large" href="https://github.com/elimuinformatics/charts-on-fhir" ngDocTooltip="GitHub Repository">
      <ng-doc-icon customIcon="github" [size]="24"></ng-doc-icon>
    </a>
  </div>
</ng-template>

After (ng-doc v19 syntax):

<h3 ngDocNavbarLeft style="margin: 0">Charts-on-FHIR</h3>
<div ngDocNavbarRight class="ng-doc-header-controls">
  <a ng-doc-button-icon size="large" href="https://github.com/elimuinformatics/charts-on-fhir" ngDocTooltip="GitHub Repository">
    <ng-doc-icon icon="github" [size]="24"></ng-doc-icon>
  </a>
</div>

2. Configured custom icons path in apps/documentation/src/app/app.module.ts:

provideNgDocApp({
  uiKit: {
    assetsPath: 'assets',
    customIconsPath: 'assets/icons',
  },
})

Result

The navbar now correctly displays the custom content across all documentation pages:

• ✅ "Charts-on-FHIR" title appears on the left side of the navbar
• ✅ GitHub repository link with icon appears on the right side
• ✅ All functionality preserved (link navigation, tooltips, styling)
• ✅ Consistent branding across the documentation site

This change ensures the documentation app maintains its proper branding and provides users with easy access to the project's GitHub repository.

Original prompt

Custom navbar content is no longer showing up in the documentation app. The documentation app uses ng-doc library. Check the docs for the version of ng-doc that we are using and update our documentation app to use the correct approach for custom navbar content.

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[semicolin]

@copilot I don't see the github icon in your screenshot

[Copilot]

@copilot I don't see the github icon in your screenshot

You're absolutely right! The GitHub icon wasn't showing up initially. I've now fixed this issue by:

1. Updating the ng-doc configuration to properly set the custom icons path
2. Using the built-in GitHub icon instead of the custom one

The navbar now displays both the title and the GitHub icon correctly. Here's the fixed result:

The fix is in commit 1762b94.