Add comprehensive test scripts for various models and services

- Implement tests for RideLocation and CompanyHeadquarters models to verify functionality and data integrity.
- Create a manual trigger test script for trending content calculation endpoint, including authentication and unauthorized access tests.
- Develop a manufacturer sync test to ensure ride manufacturers are correctly associated with ride models.
- Add tests for ParkLocation model, including coordinate setting and distance calculations between parks.
- Implement a RoadTripService test suite covering geocoding, route calculation, park discovery, and error handling.
- Create a unified map service test script to validate map functionality, API endpoints, and performance metrics.

docs/TAILWIND_V4_QUICK_REFERENCE.md

@@ -0,0 +1,80 @@
+# Tailwind CSS v4 Quick Reference Guide
+
+## Common v3 → v4 Utility Migrations
+
+| v3 Utility | v4 Utility | Notes |
+|------------|------------|-------|
+| `outline-none` | `outline-hidden` | Accessibility improvement |
+| `ring` | `ring-3` | Must specify ring width |
+| `shadow-sm` | `shadow-xs` | Renamed for consistency |
+| `shadow` | `shadow-sm` | Renamed for consistency |
+| `flex-shrink-0` | `shrink-0` | Shortened syntax |
+| `bg-blue-500 bg-opacity-50` | `bg-blue-500/50` | New opacity syntax |
+| `text-gray-700 text-opacity-75` | `text-gray-700/75` | New opacity syntax |
+| `!outline-none` | `!outline-hidden` | Updated important syntax |
+
+## Theme Variables (Available in CSS)
+
+```css
+/* Colors */
+var(--color-primary)    /* #4f46e5 - Indigo-600 */
+var(--color-secondary)  /* #e11d48 - Rose-600 */
+var(--color-accent)     /* #8b5cf6 - Violet-500 */
+
+/* Fonts */
+var(--font-family-sans) /* Poppins, sans-serif */
+```
+
+## Usage in Templates
+
+### Before (v3)
+```html
+<button class="outline-none ring hover:ring-2 shadow-sm bg-blue-500 bg-opacity-75">
+  Click me
+</button>
+```
+
+### After (v4)
+```html
+<button class="outline-hidden ring-3 hover:ring-2 shadow-xs bg-blue-500/75">
+  Click me
+</button>
+```
+
+## Development Commands
+
+### Start Development Server
+```bash
+lsof -ti :8000 | xargs kill -9; find . -type d -name "__pycache__" -exec rm -r {} +; uv run manage.py tailwind runserver
+```
+
+### Force CSS Rebuild
+```bash
+uv run manage.py tailwind build
+```
+
+## New v4 Features
+
+- **CSS-first configuration** via `@theme` blocks
+- **Improved opacity syntax** with `/` operator  
+- **Better color-mix() support**
+- **Enhanced dark mode utilities**
+- **Faster compilation**
+
+## Troubleshooting
+
+### Unknown utility class error
+1. Check if utility was renamed (see table above)
+2. Verify custom theme variables are defined
+3. Run clean build process
+
+### Colors not working
+1. Ensure `@theme` block exists in `static/css/src/input.css`
+2. Check CSS variable names match usage
+3. Verify CSS compilation completed
+
+## Resources
+
+- [Full Migration Documentation](./TAILWIND_V4_MIGRATION.md)
+- [Tailwind CSS v4 Official Docs](https://tailwindcss.com/docs)
+- [Django-Tailwind Package](https://django-tailwind.readthedocs.io/)