Polish DHCP inactive time display

public/assets/app.js

@@ -1226,7 +1226,7 @@
 
     function wifiRateCells(row) {
         if (row?.band === 'LAN') {
-            return `<td colspan="2">${escapeHtml(wifiCellValue(row, 'tx_bitrate'))}</td>`;
+            return `<td colspan="2" class="lan-link-speed">${escapeHtml(wifiCellValue(row, 'tx_bitrate'))}</td>`;
         }
 
         return `${wifiMetricCell(row, 'tx_bitrate')}${wifiMetricCell(row, 'rx_bitrate')}`;
@@ -1354,6 +1354,24 @@
         return formatDhms(parseWifiDurationSeconds(value)) || value;
     }
 
+    function wifiInactiveTime(value) {
+        const text = String(value ?? '').trim();
+        if (text === '' || text.toUpperCase() === 'N/A' || text === '-') {
+            return '-';
+        }
+
+        const msMatch = text.match(/^(\d+(?:\.\d+)?)\s*ms$/i);
+        if (msMatch) {
+            const ms = Number(msMatch[1]);
+            if (Number.isFinite(ms) && ms <= 1000) {
+                return `${Math.round(ms)} ms`;
+            }
+            return formatDhms(ms / 1000) || text;
+        }
+
+        return formatDhms(parseWifiDurationSeconds(text)) || text;
+    }
+
     function wifiCellValue(row, key) {
         const value = row?.[key];
         const text = String(value ?? '').trim();
@@ -1440,7 +1458,7 @@
                     ${wifiMetricCell(row, 'signal')}
                     ${wifiRateCells(row)}
                     ${td(wifiConnectedCellValue(row))}
-                    ${td(wifiCellValue(row, 'inactive_time'))}
+                    ${td(wifiInactiveTime(row.inactive_time))}
                 </tr>
             `).join('')
             : `<tr><td colspan="9">${escapeHtml(t('noWifiClients'))}</td></tr>`;