Phone Jump button; docs never scroll sideways; presence sweep timing kept

- Jump (phones / tablets): find a device by name and scroll to its card, or
  jump to a section, the top or the bottom of the page.
- Documentation on phones: long paths, links, code and tables wrap; toolbar is
  title, last edited, then the buttons.
- Filter bar's Clear is the only clear button on phones.
- Card fields: search box and add list as wide as the field rows.
- Presence sweep: the demo uses the hourly schedule too, and the last sweep
  time survives a worker restart (a restart used to trigger an extra sweep).

USMT-Worker.ps1

@@ -146,6 +146,12 @@ $hasLastSeen = [bool](Get-Command Get-DeviceLastSeen -ErrorAction SilentlyContin
 # Every ping the worker makes is recorded here: when the device was last checked, what the
 # ping said, and when it last answered. Kept across restarts in Presence.json.
 $global:Presence = Read-JsonTable $presencePath
+# When the last presence sweep ran survives a worker restart, so a restart doesn't trigger
+# an extra sweep (it's kept in Presence.json under a reserved key)
+if ($global:Presence.ContainsKey('__sweep')) {
+    try { $global:LastPresenceSweep = [datetime]$global:Presence['__sweep'].Last } catch {}
+    $global:Presence.Remove('__sweep')
+}
 $global:PingedThisCycle = [System.Collections.Generic.HashSet[string]]::new([StringComparer]::OrdinalIgnoreCase)
 
 function Set-Presence {
@@ -272,7 +278,9 @@ function Save-AdvancedCache {
         $out[$key] = $entry
     }
     Write-JsonFile $advancedCachePath $out 5
-    Write-JsonFile $presencePath $global:Presence 4
+    $presenceOut = @{} + $global:Presence
+    if ($global:LastPresenceSweep -gt [datetime]::MinValue) { $presenceOut['__sweep'] = @{ Last = $global:LastPresenceSweep.ToString("o") } }
+    Write-JsonFile $presencePath $presenceOut 4
 }
 
 # Cached / skipped rows show the latest presence-sweep result instead of a placeholder
@@ -796,7 +804,7 @@ while ($true) {
         }
         $presenceCount = $toPing.Count
         $global:LastPresenceSweep = Get-Date
-        Write-Host "[Presence Updated]" -ForegroundColor Green
+        Write-Host "[Presence Updated. Next presence sweep after $($global:LastPresenceSweep.AddMinutes($presenceMinutes).ToString('hh:mm tt')), or at midnight]" -ForegroundColor Green
     }
     $presenceSeconds = $phaseWatch.Elapsed.TotalSeconds
     $phaseWatch.Restart()