upd: stack trace hide/show toggle and date format DD/MM/YYYY 24h

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/frontend/routes/bug-reports.tsx

@@ -535,7 +535,7 @@ function ListErrorsPage() {
                           </Group>
                           <Group gap="md">
                             <Text size="xs" c="dimmed">
-                              {new Date(bug.createdAt).toLocaleString()} • {bug.appId?.toUpperCase()} • v{bug.affectedVersion}
+                              {new Date(bug.createdAt).toLocaleString('en-GB', { day: '2-digit', month: '2-digit', year: 'numeric', hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false })} • {bug.appId?.toUpperCase()} • v{bug.affectedVersion}
                             </Text>
                           </Group>
                         </Box>