Refactor: enhance dashboard layout and experiment management features

- Added functionality to save and retrieve the current dashboard view in localStorage for improved user experience.
- Updated DashboardLayout component to handle view changes with access control based on user roles.
- Renamed Experiments component to ExperimentManagement for clarity.
- Introduced new ExperimentPhase interface and related utility functions for managing experiment phases.
- Updated seed data to include initial roles and experiment phases for testing.
- Cleaned up unnecessary blank lines in various files for better code readability.

management-dashboard-web-app/src/App.tsx

@@ -71,6 +71,7 @@ function App() {
 
       // Clear any local storage items
       localStorage.removeItem('supabase.auth.token')
+      localStorage.removeItem('dashboard-current-view')
 
       // Reset state
       setIsAuthenticated(false)
@@ -79,6 +80,7 @@ function App() {
     } catch (error) {
       console.error('Logout error:', error)
       // Still reset state even if there's an error
+      localStorage.removeItem('dashboard-current-view')
       setIsAuthenticated(false)
       setCurrentRoute('/')
       window.history.pushState({}, '', '/')