Refactor experiment management and update data structures

- Renamed columns in the experimental run sheet CSV for clarity.
- Updated the ExperimentForm component to include new fields for weight per repetition and additional parameters specific to Meyer Cracker experiments.
- Enhanced the data entry logic to handle new experiment phases and machine types.
- Refactored repetition scheduling logic to use scheduled_date instead of schedule_status for better clarity in status representation.
- Improved the user interface for displaying experiment phases and their associated statuses.
- Removed outdated seed data and updated database migration scripts to reflect the new schema changes.

management-dashboard-web-app/supabase/migrations/20250102000001_add_conductor_availability.sql

@@ -72,7 +72,78 @@ CREATE INDEX IF NOT EXISTS idx_experiment_phase_assignments_scheduled_start ON p
 CREATE INDEX IF NOT EXISTS idx_experiment_phase_assignments_created_by ON public.experiment_phase_assignments(created_by);
 
 -- =============================================
--- 4. FUNCTIONS FOR OVERLAP PREVENTION
+-- 4. UTILITY FUNCTIONS
+-- =============================================
+
+-- Function to handle updated_at timestamp
+CREATE OR REPLACE FUNCTION public.handle_updated_at()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Helper function to get current user's roles
+CREATE OR REPLACE FUNCTION public.get_user_roles()
+RETURNS TEXT[] AS $$
+BEGIN
+    RETURN ARRAY(
+        SELECT r.name
+        FROM public.user_roles ur
+        JOIN public.roles r ON ur.role_id = r.id
+        WHERE ur.user_id = auth.uid()
+    );
+END;
+$$ LANGUAGE plpgsql SECURITY DEFINER;
+
+-- Helper function to get current user's first role (for backward compatibility)
+CREATE OR REPLACE FUNCTION public.get_user_role()
+RETURNS TEXT AS $$
+BEGIN
+    -- Return the first role found (for backward compatibility)
+    RETURN (
+        SELECT r.name
+        FROM public.user_roles ur
+        JOIN public.roles r ON ur.role_id = r.id
+        WHERE ur.user_id = auth.uid()
+        LIMIT 1
+    );
+END;
+$$ LANGUAGE plpgsql SECURITY DEFINER;
+
+-- Helper function to check if user is admin
+CREATE OR REPLACE FUNCTION public.is_admin()
+RETURNS BOOLEAN AS $$
+BEGIN
+    RETURN 'admin' = ANY(public.get_user_roles());
+END;
+$$ LANGUAGE plpgsql SECURITY DEFINER;
+
+-- Helper function to check if user has specific role
+CREATE OR REPLACE FUNCTION public.has_role(role_name TEXT)
+RETURNS BOOLEAN AS $$
+BEGIN
+    RETURN role_name = ANY(public.get_user_roles());
+END;
+$$ LANGUAGE plpgsql SECURITY DEFINER;
+
+-- Helper function to check if user can manage experiments
+CREATE OR REPLACE FUNCTION public.can_manage_experiments()
+RETURNS BOOLEAN AS $$
+BEGIN
+    RETURN EXISTS (
+        SELECT 1
+        FROM public.user_roles ur
+        JOIN public.roles r ON ur.role_id = r.id
+        WHERE ur.user_id = auth.uid()
+        AND r.name IN ('admin', 'conductor')
+    );
+END;
+$$ LANGUAGE plpgsql SECURITY DEFINER;
+
+-- =============================================
+-- 5. FUNCTIONS FOR OVERLAP PREVENTION
 -- =============================================
 
 -- Function to check for overlapping availabilities
@@ -156,7 +227,7 @@ END;
 $$ LANGUAGE plpgsql;
 
 -- =============================================
--- 5. TRIGGERS
+-- 6. TRIGGERS
 -- =============================================
 
 -- Create trigger for updated_at on conductor_availability
@@ -239,7 +310,7 @@ END;
 $$ LANGUAGE plpgsql SECURITY DEFINER;
 
 -- =============================================
--- 7. ROW LEVEL SECURITY (RLS)
+-- 8. ROW LEVEL SECURITY (RLS)
 -- =============================================
 
 -- Enable RLS on new tables