committed 10:39AM - 06 Nov 23 UTC
The motivation of this PR is to remove our dependence on Ember's 'named outlets'…, which are removed in Ember 4+.
At a high-level, the changes can be summarized as:
- The top-level `discovery` route is totally emptied of all logic. The HTML structure of the template is moved into the `<Discovery::Layout />` component for use by child routes.
- `AbstractTopicRoute` and `AbstractCategoryRoute` routes now both lean on the `DiscoverySortableController` and associated template. This controller is where most of the logic from the old top-level `discovery` controller has ended up.
- All navigation controllers/templates have been replaced with components. `navigation/categories`, `navigation/category` and `navigation/default` were very similar, and so they've all been combined into `<Navigation::Default>`. `navigation/filter` gets its own component.
- The `discovery/topics` controller/template have been moved into a new `<Discovery::Topics>` component.
Various other parts of the app have been tweaked to support these changes, but I've tried to keep that to a minimum.
Anything from `<TopicList>` down is untouched, which should hopefully mean that a large proportion of topic-list-customizing themes are unaffected.
For more information, see https://meta.discourse.org/t/282816
