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

Conflicts:
- `app/controllers/admin/base_controller.rb`:
  Minor conflict caused by glitch-soc's theming system.
- `app/javascript/mastodon/initial_state.js`:
  Minor conflict caused by glitch-soc making use of max_toot_chars.
- `app/models/form/admin_settings.rb`:
  Minor conflict caused by glitch-soc's theming system.
- `app/models/trends.rb`:
  Minor conflict caused by glitch-soc having more granular
  notification settings for trends.
- `app/views/admin/accounts/index.html.haml`:
  Minor conflict caused by glitch-soc's theming system.
- `app/views/admin/instances/show.html.haml`:
  Minor conflict caused by glitch-soc's theming system.
- `app/views/layouts/application.html.haml`:
  Minor conflict caused by glitch-soc's theming system.
- `app/views/settings/preferences/notifications/show.html.haml`:
  Minor conflict caused by glitch-soc having more granular
  notification settings for trends.
- `config/navigation.rb`:
  Minor conflict caused by glitch-soc having additional
  navigation items for the theming system while upstream
  slightly changed every line.

1 files changed, 10 insertions, 0 deletions

diff --git a/app/views/custom_css/show.css.erb b/app/views/custom_css/show.css.erb
new file mode 100644
index 000000000..521834832
--- /dev/null
+++ b/app/views/custom_css/show.css.erb
@@ -0,0 +1,10 @@
+<%- if Setting.custom_css.present? %>
+<%= Setting.custom_css %>
+
+<%- end %>
+<%- UserRole.where(highlighted: true).select { |role| role.color.present? }.each do |role| %>
+.user-role-<%= role.id %> {
+  --user-role-accent: <%= role.color %>;
+}
+
+<%- end %>