fix(web): address review feedback on the monitoring column (#1616)

- ResizeHandle: clear the `resizing-col` body class on unmount so a drag
  interrupted by the handle unmounting (narrow past the breakpoint / disconnect)
  can't leave page-wide user-select:none / col-resize applied.
- Embedded monitor column now shows the full unfiltered stream instead of
  silently mirroring the full-size screen's live filter (the column has no
  filter control to explain an empty/partial list).
- MonitoringControls: give the SegmentedControl an aria-label ("Monitoring
  screen") so the tab group has an accessible name.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

clients/web/src/components/groups/LogStreamPanel/LogStreamPanel.tsx

@@ -80,13 +80,16 @@ export function LogStreamPanel({
 }: LogStreamPanelProps) {
   const viewportRef = useScrollMemory("logs-stream");
   const filteredEntries = useMemo(() => {
-    // `.filter()` returns a fresh array, so sorting in-place is safe.
+    // The embedded column has no filter sidebar, so it shows the full stream
+    // rather than mirroring the full-size screen's live filter with no visible
+    // control to explain it (#1616). `.filter()` returns a fresh array, so
+    // sorting in-place is safe.
     const sorted = entries
-      .filter((e) => matchesFilters(e, filterText, visibleLevels))
+      .filter((e) => embedded || matchesFilters(e, filterText, visibleLevels))
       .sort((a, b) => a.receivedAt.getTime() - b.receivedAt.getTime());
     if (sortDirection === "newest-first") sorted.reverse();
     return sorted;
-  }, [entries, filterText, visibleLevels, sortDirection]);
+  }, [entries, filterText, visibleLevels, sortDirection, embedded]);
 
   return (
     <PanelContainer>