Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `README.md`:
  Upstream updated its README, while we have a completely different one.
  Kept our README.
- `app/controllers/concerns/web_app_controller_concern.rb`:
  Conflict because of glitch-soc's theming system.
  Additionally, glitch-soc has different behavior regarding moved accounts.
  Ported some of the changes, but kept our overall behavior.
- `app/javascript/packs/admin.js`:
  Code changes actually applied to `app/javascript/core/admin.js`

app/controllers/admin/instances_controller.rb

@@ -49,7 +49,7 @@ module Admin
     private
 
     def set_instance
-      @instance = Instance.find(params[:id])
+      @instance = Instance.find(TagManager.instance.normalize_domain(params[:id]&.strip))
     end
 
     def set_instances

app/controllers/concerns/web_app_controller_concern.rb

@@ -4,8 +4,8 @@ module WebAppControllerConcern
   extend ActiveSupport::Concern
 
   included do
+    prepend_before_action :redirect_unauthenticated_to_permalinks!
     before_action :set_pack
-    before_action :redirect_unauthenticated_to_permalinks!
     before_action :set_app_body_class
     before_action :set_referrer_policy_header
   end
@@ -19,7 +19,7 @@ module WebAppControllerConcern
   end
 
   def redirect_unauthenticated_to_permalinks!
-    return if user_signed_in?
+    return if user_signed_in? # NOTE: Different from upstream because we allow moved users to log in
 
     redirect_path = PermalinkRedirector.new(request.path).redirect_path