fix(lint): import sort + eslint-disable for timer-handle ref clear in effect

CI-caught: cron-jobs-section had an extra blank line between sorted imports; use-message-stream's visibility-flush effect assigns flushHandleRef.current=null inside a useEffect (legitimate timer-clear, not an atom mirror) — eslint-disable-next-line per the rule's documented convention.

apps/desktop/src/app/chat/sidebar/cron-jobs-section.tsx

@@ -2,7 +2,6 @@ import { useStore } from '@nanostores/react'
 import { useEffect, useMemo, useState } from 'react'
 
 import { usePaneVisible } from '@/components/pane-shell/pane-visibility'
-
 import { ActionsContextMenu, type MenuKit, renderActionItem } from '@/components/ui/actions-menu'
 import { Codicon } from '@/components/ui/codicon'
 import { DisclosureCaret } from '@/components/ui/disclosure-caret'

apps/desktop/src/app/session/hooks/use-message-stream/index.ts

@@ -360,6 +360,7 @@ export function useMessageStream({
   // Page Visibility does not report every Windows/Linux focus transition.
   // Flush queued deltas on both signals so returning to a chat cannot leave a
   // completed chunk waiting for the next throttled timer.
+  // eslint-disable-next-line no-restricted-syntax -- timer-handle clear inside effect, not an atom mirror
   useEffect(() => {
     const flushPendingDeltas = () => {
       if (flushHandleRef.current !== null) {