feat(ui-flow): set-threads-panel-sort IPC (v0.8.98)

Wire threads panel sort mode through the UI flow bridge.

Co-authored-by: Cursor <[email protected]>

index.js

@@ -668,6 +668,11 @@ async function dispatchUiMessage (platform, msg, hooks = {}) {
     pushState()
     return true
   }
+  if (t === 'set-threads-panel-sort') {
+    platform.setThreadsPanelSort(msg.panelSort || 'activity')
+    pushState()
+    return true
+  }
   if (t === 'archive-thread') {
     await platform.archiveThread(msg.threadId, msg.archived !== false)
     pushState()