feat: integrate Spatie Media Library (#4)

- Added Spatie Media Library
- Added media library configuration file
- Updated Entry model to support media handling
- Added featured image upload with gallery selection and preview
- Added login tests with Dusk for user authentication
- Added Dusk test for featured image selection

Co-authored-by: jon brookes <marshyon@gmail.com>
Reviewed-on: https://codeberg.org/headshed/share-lt/pulls/4

.github/copilot-instructions.md

@@ -15,6 +15,7 @@ This application is a Laravel application and its main Laravel ecosystems packag
 - laravel/prompts (PROMPTS) - v0
 - livewire/flux (FLUXUI_FREE) - v2
 - livewire/livewire (LIVEWIRE) - v3
+- laravel/dusk (DUSK) - v8
 - laravel/mcp (MCP) - v0
 - laravel/pint (PINT) - v1
 - laravel/sail (SAIL) - v1
@@ -43,6 +44,13 @@ This application is a Laravel application and its main Laravel ecosystems packag
 ## Documentation Files
 - You must only create documentation files if explicitly requested by the user.
 
+## Testing Approach - CRITICAL
+- **THE APPLICATION IS 100% WORKING** - All functionality works perfectly in production.
+- When writing or debugging browser tests (Laravel Dusk), focus ONLY on test syntax, selectors, and Dusk interaction methods.
+- NEVER assume the application has bugs or suggest app fixes - the issue is always in the test code.
+- Trust the existing functionality and work on getting the correct CSS selectors, XPath expressions, and Dusk methods.
+- If manual interaction works but the test fails, the problem is the test implementation, not the app.
+
 
 === boost rules ===