feat: use authored category names for mods

Store categories as authored strings. Trim and deduplicate without changing case, compare without case sensitivity, and keep all observed categories available to filters and editors.

locale/ui_es.properties

@@ -57,20 +57,20 @@ mods/catalog_export = Exportar al catálogo
 mods/catalog_title = Exportar entrada del catálogo
 mods/catalog_download_url = URL de descarga
 mods/catalog_category = Categoría
-mods/category_story = Historia
-mods/category_characters = Personajes
-mods/category_gameplay = Jugabilidad
-mods/category_visual = Visual
-mods/category_audio = Audio
-mods/category_ui = Interfaz
-mods/category_locale = Idioma
-mods/category_library = Biblioteca
-mods/category_engine = Motor
-mods/category_overhaul = Conversión total
-mods/category_tools = Herramientas
-mods/category_editor = Editor
-mods/category_debug = Depuración
-mods/category_other = Otros
+mod_category/story = Historia
+mod_category/characters = Personajes
+mod_category/gameplay = Jugabilidad
+mod_category/visual = Visual
+mod_category/audio = Audio
+mod_category/ui = Interfaz
+mod_category/locale = Idioma
+mod_category/library = Biblioteca
+mod_category/engine = Motor
+mod_category/overhaul = Conversión total
+mod_category/tools = Herramientas
+mod_category/editor = Editor
+mod_category/debug = Depuración
+mod_category/other = Otros
 mods/catalog_tags = Etiquetas (separadas por comas)
 mods/catalog_changelog = Cambios
 mods/catalog_status = Estado