BTHLABS-60: Appearance settings

Co-authored-by: Tomek Wójcik <labs@tomekwojcik.pl>
Co-committed-by: Tomek Wójcik <labs@tomekwojcik.pl>

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

@@ -143,13 +143,18 @@ class SettingsForm(Form):
 
     theme = forms.ChoiceField(
         label=_('Theme'),
-        disabled=True,
+        disabled=False,
         required=False,
         choices=[
-            (None, _('Bootstrap')),
+            (None, _('BTHLabs')),
+            ('bootstrap', _('Bootstrap')),
             ('cosmo', _('Cosmo')),
+            ('solar', _('Solar')),
         ],
-        show_hidden_initial=True,
+    )
+    light_mode = forms.BooleanField(
+        label=_('Use light mode'),
+        required=False,
     )
     auto_load_embeds = forms.ChoiceField(
         label=_('Auto load embedded content'),
@@ -168,6 +173,7 @@ class SettingsForm(Form):
     def get_layout_fields(self) -> list[str]:
         return [
             'theme',
+            'light_mode',
             'auto_load_embeds',
         ]