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/rides/apps.py

@@ -6,4 +6,12 @@ class RidesConfig(AppConfig):
     name = "apps.rides"
 
     def ready(self):
-        pass
+        import apps.rides.choices  # noqa: F401 - Register choices
+        import apps.rides.tasks  # noqa: F401 - Register Celery tasks
+        from apps.core.state_machine import apply_state_machine
+        from apps.rides.models import Ride
+
+        # Register FSM transitions for Ride
+        apply_state_machine(
+            Ride, field_name="status", choice_group="statuses", domain="rides"
+        )