User management resource with editable is_admin field, postcode support,
admin filter, and inline delete action. Includes list and edit pages.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Includes verified API authentication flow, correct base URL, all DB
table schemas for stations, current prices, history, and archive.
Fuel types corrected to match live API (B7_STANDARD, B7_PREMIUM).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>