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

Conflicts:
- `app/views/admin/announcements/edit.html.haml`:
  Upstream change too close to theming-related glitch-soc change.
  Ported upstream changes.
- `app/views/admin/announcements/new.html.haml`
  Upstream change too close to theming-related glitch-soc change.
  Ported upstream changes.

app/services/import_service.rb

@@ -136,7 +136,7 @@ class ImportService < BaseService
   end
 
   def import_data
-    Paperclip.io_adapters.for(@import.data).read
+    Paperclip.io_adapters.for(@import.data).read.force_encoding(Encoding::UTF_8)
   end
 
   def relations_map_for_account(account, account_ids)