Replace custom CSS (.form-section, gradients, var(--racing-green)) with
standard Bootstrap card-based layout matching the rest of the modernized UI:
dark card headers, responsive grid rows, consistent shadow-sm styling.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Change all form templates from col-md-6 to col-12 layout
- Affects destinataer_form.html, paechter_form.html, and land_form.html
- Ensures consistent single-column layout across all entity forms
- All input fields now appear underneath their labels instead of side-by-side
- Improves form readability and user experience on all screen sizes
- Add dotenv loading to Django settings
- Update CI workflow to use correct environment variables
- Set POSTGRES_* variables instead of DATABASE_URL
- Add environment variables to all Django management commands
- Fixes CI test failures due to database connection issues
