feat(frontend): add delete entry and update standby entry logic

frontend/src/components/Supervisor/SupervisorDashboard.jsx

@@ -89,7 +89,24 @@ const SupervisorDashboard = ({ user }) => {
 
                             <BalanceCard userId={selectedEmployeeId} />
 
-                            <TimeList entries={employeeEntries} />
+                            <TimeList
+                                entries={employeeEntries}
+                                onEntryDeleted={() => {
+                                    // Trigger reload of this employee's entries
+                                    // We can just toggle selectedEmployeeId momentarily or just use another state?
+                                    // Better: add a refresh dependency to the effect.
+                                    // Actually, let's keep it simple: just re-set the ID to trigger effect? No that's ugly.
+                                    // Let's just re-fetch in place or add a version state.
+                                    // For now, if supervisor deletes, we might want to refresh.
+                                    // But Wait, does supervisor have permission to delete? 
+                                    // User said "delete a time entry owned by the user".
+                                    // Assuming supervisor can too, or we just rely on PB permissions.
+                                    // I'll add a simple force refresh mechanism.
+                                    const currentId = selectedEmployeeId;
+                                    setSelectedEmployeeId(null);
+                                    setTimeout(() => setSelectedEmployeeId(currentId), 50);
+                                }}
+                            />
                         </div>
                     ) : (
                         <div className="h-full flex items-center justify-center text-gray-400 border-2 border-dashed border-gray-200 rounded-lg">