fix: standardize card/list action buttons and hover states (refs #51)

- Documents page: Convert from text buttons to icon buttons (Eye for
  View Details, Trash for Delete), add card hover shadow effect,
  convert to MUI components for consistency
- Fuel Logs: Add row hover background effect on list items
- Maintenance Records: Add card hover shadow effect
- Maintenance Schedules: Add card hover shadow effect

All changes follow the VehicleCard pattern with:
- Light gray shadow/elevation on hover with 0.2s transition
- Consistent icon button styling with mobile-responsive touch targets
- Proper MUI component usage throughout

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/features/fuel-logs/components/FuelLogsList.tsx

@@ -162,7 +162,12 @@ export const FuelLogsList: React.FC<FuelLogsListProps> = ({ logs, onEdit, onDele
                   flexDirection: isMobile ? 'column' : 'row',
                   alignItems: isMobile ? 'stretch' : 'center',
                   gap: isMobile ? 1 : 0,
-                  py: isMobile ? 2 : 1
+                  py: isMobile ? 2 : 1,
+                  '&:hover': {
+                    backgroundColor: 'action.hover',
+                  },
+                  transition: 'background-color 0.2s ease-in-out',
+                  cursor: 'default',
                 }}
               >
                 <Box sx={{