BTHLABS-0000: sandstone and sketchy Bootswatch themes

NOTICE.txt

@@ -88,3 +88,7 @@ Copyright (c) Icons8
 Licensed under terms of the MIT License
 
 Spinner Loader CSS from https://css-loaders.com/
+
+cosmo, sandstone, sketchy and solar Bootswatch Themes
+Copyright 2012-2025 Thomas Park
+Licensed under terms of the MIT License

services/backend/hotpocket_backend/apps/ui/context_processors.py

@@ -73,6 +73,12 @@ def appearance_settings(request: HttpRequest) -> dict:
         case 'solar':
             result['theme_css'] = 'ui/css/solar.min.css'
 
+        case 'sandstone':
+            result['theme_css'] = 'ui/css/sandstone.min.css'
+
+        case 'sketchy':
+            result['theme_css'] = 'ui/css/sketchy.min.css'
+
     return {
         'APPEARANCE_SETTINGS': result,
     }

services/backend/hotpocket_backend/apps/ui/forms/accounts/settings.py

@@ -150,6 +150,8 @@ class SettingsForm(Form):
             ('bootstrap', _('Bootstrap')),
             ('cosmo', _('Cosmo')),
             ('solar', _('Solar')),
+            ('sandstone', _('Sandstone')),
+            ('sketchy', _('Sketchy')),
         ],
     )
     light_mode = forms.BooleanField(