chore: fix pghistory migration deps and improve htmx utilities

- Update pghistory dependency from 0007 to 0006 in account migrations
- Add docstrings and remove unused imports in htmx_forms.py
- Add DJANGO_SETTINGS_MODULE bash commands to Claude settings
- Add state transition definitions for ride statuses

backend/apps/accounts/migrations/0003_emailverificationevent_passwordresetevent_userevent_and_more.py

@@ -12,7 +12,7 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
     dependencies = [
         ("accounts", "0002_remove_toplistevent_pgh_context_and_more"),
-        ("pghistory", "0007_auto_20250421_0444"),
+        ("pghistory", "0006_delete_aggregateevent"),
     ]
 
     operations = [

backend/apps/accounts/migrations/0004_userdeletionrequest_userdeletionrequestevent_and_more.py

@@ -14,7 +14,7 @@ class Migration(migrations.Migration):
             "accounts",
             "0003_emailverificationevent_passwordresetevent_userevent_and_more",
         ),
-        ("pghistory", "0007_auto_20250421_0444"),
+        ("pghistory", "0006_delete_aggregateevent"),
     ]
 
     operations = [

backend/apps/accounts/migrations/0009_notificationpreference_notificationpreferenceevent_and_more.py

@@ -13,7 +13,7 @@ class Migration(migrations.Migration):
         ("accounts", "0008_remove_first_last_name_fields"),
         ("contenttypes", "0002_remove_content_type_name"),
         ("django_cloudflareimages_toolkit", "0001_initial"),
-        ("pghistory", "0007_auto_20250421_0444"),
+        ("pghistory", "0006_delete_aggregateevent"),
     ]
 
     operations = [