Enhance development standards and UI components

- Updated .rules to enforce stricter UI/UX standards, including exclusive use of Lucide icons and consistent patterns for entity view pages.
- Added new UI components for entity views, including headers, sections, and quick actions to improve layout and reusability.
- Refactored existing pages (experiments, participants, studies, trials) to utilize the new entity view components, enhancing consistency across the dashboard.
- Improved accessibility and user experience by implementing loading states and error boundaries in async operations.
- Updated package dependencies to ensure compatibility and performance improvements.

Features:
- Comprehensive guidelines for component reusability and visual consistency.
- Enhanced user interface with new entity view components for better organization and navigation.

Breaking Changes: None - existing functionality remains intact.

scripts/seed-dev.ts

@@ -233,8 +233,8 @@ async function main() {
       },
       {
         studyId: study1.id,
-        userId: seanUser.id, // Sean (observer)
-        role: "observer" as const,
+        userId: seanUser.id, // Sean (researcher)
+        role: "researcher" as const,
         joinedAt: new Date(),
       },