Keep the job list mounted across sidebar collapse so it does not flash.

Expanding used to replay a fade-in and sometimes remount CronApp onto an
empty state before /jobs returned. Reattach the existing root and skip
setState when the snapshot has not changed.

lib/client.js

@@ -162,6 +162,15 @@ window.__ModuleLoader__.load({
     const API = '/dsh-cron-tasks'
     const LOCALE_NS = 'settings.dshCronTasks'
     const TITLE_PREFIX = '定时任务 · '
+    const listSnapshot = { jobs: [], runs: [], workspaces: [], catalog: { groups: [], current: null } }
+
+    function jobStamp(rows) {
+      return (rows || []).map((row) => `${row.id}:${row.updatedAt}:${row.nextRunAt}:${row.enabled}:${row.lastStatus}:${row.model}:${row.provider}`).join('|')
+    }
+
+    function runStamp(rows) {
+      return (rows || []).map((row) => `${row.id}:${row.status}:${row.actualAt}:${row.summary || ''}`).join('|')
+    }
     const DEFAULTS = {
       enabled: true,
       timezone: 'Asia/Shanghai',
@@ -201,7 +210,7 @@ window.__ModuleLoader__.load({
 [class*="_collapsed"] .dsh-ct-entry .dsh-ct-entryLabel,.dsh-ct-entry[data-collapsed=true] .dsh-ct-entryLabel{display:none!important;max-width:0;min-width:0;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none}
 [class*="_collapsed"] .dsh-ct-entry svg,.dsh-ct-entry[data-collapsed=true] svg{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);margin:0}
 .dsh-ct-region{display:none !important;flex-direction:column;flex:1;min-height:0;overflow:hidden;padding-right:var(--dsh-sidebar-inline-padding,12px);box-sizing:border-box}
-[data-dsh-ct-mode=on] .dsh-ct-region{display:flex !important;animation:dsh-ct-fade-in .18s var(--ds-ease-in-out,ease)}
+[data-dsh-ct-mode=on] .dsh-ct-region{display:flex !important}
 [class*="_collapsed"][data-dsh-ct-mode=on] .dsh-ct-region,[class*="_collapsed"] .dsh-ct-region{display:none !important}
 [data-dsh-ct-mode=on] [class*="regionArea"] > :not(.dsh-ct-region){display:none !important}
 @keyframes dsh-ct-fade-in{0%{opacity:0;transform:translateY(4px)}100%{opacity:1;transform:none}}
@@ -870,15 +879,15 @@ body>.dsh-ct-main{position:fixed;top:0;right:0;bottom:0;left:var(--dsh-ct-sideba
     }
 
     function CronApp({ t, faces }) {
-      const [jobs, setJobs] = useState([])
-      const [runs, setRuns] = useState([])
+      const [jobs, setJobs] = useState(() => listSnapshot.jobs)
+      const [runs, setRuns] = useState(() => listSnapshot.runs)
       const [selection, setSelection] = useState({ type: 'new' })
       const [expanded, setExpanded] = useState({})
       const [form, setForm] = useState(emptyForm())
       const [error, setError] = useState('')
       const [cronMode, setCronMode] = useState(false)
-      const [workspaces, setWorkspaces] = useState([])
-      const [catalog, setCatalog] = useState({ groups: [], current: null })
+      const [workspaces, setWorkspaces] = useState(() => listSnapshot.workspaces)
+      const [catalog, setCatalog] = useState(() => listSnapshot.catalog)
       const [paneHost, setPaneHost] = useState(() => (typeof document === 'undefined' ? null : document.body))
       const skipAutoSelect = useRef(false)
 
@@ -909,11 +918,23 @@ body>.dsh-ct-main{position:fixed;top:0;right:0;bottom:0;left:var(--dsh-ct-sideba
             api('/workspaces').catch(() => ({ workspaces: [] })),
             api('/models').catch(() => ({ groups: [], current: null })),
           ])
-          setJobs(jobBody.jobs || [])
-          setRuns(histBody.runs || [])
-          setWorkspaces(wsBody.workspaces || [])
-          setCatalog({ groups: modelBody.groups || [], current: modelBody.current || null })
-          faces.cronSessionIds = new Set((histBody.runs || []).map((run) => run.sessionId).filter(Boolean))
+          const nextJobs = jobBody.jobs || []
+          const nextRuns = histBody.runs || []
+          const nextWorkspaces = wsBody.workspaces || []
+          const nextCatalog = { groups: modelBody.groups || [], current: modelBody.current || null }
+          if (jobStamp(listSnapshot.jobs) !== jobStamp(nextJobs)) {
+            listSnapshot.jobs = nextJobs
+            setJobs(nextJobs)
+          }
+          if (runStamp(listSnapshot.runs) !== runStamp(nextRuns)) {
+            listSnapshot.runs = nextRuns
+            setRuns(nextRuns)
+          }
+          listSnapshot.workspaces = nextWorkspaces
+          listSnapshot.catalog = nextCatalog
+          setWorkspaces(nextWorkspaces)
+          setCatalog(nextCatalog)
+          faces.cronSessionIds = new Set(nextRuns.map((run) => run.sessionId).filter(Boolean))
           setError('')
         } catch (err) {
           setError(err instanceof Error ? err.message : String(err))
@@ -1329,20 +1350,17 @@ body>.dsh-ct-main{position:fixed;top:0;right:0;bottom:0;left:var(--dsh-ct-sideba
             })
           }
 
-          if (region && (!listRoot || listRoot.parentElement !== region)) {
-            if (appRoot) {
-              try { appRoot.unmount() } catch { /* ignore */ }
-              appRoot = null
-            }
-            if (listRoot) listRoot.remove()
+          if (region) {
+            if (!listRoot) {
               listRoot = document.createElement('div')
               listRoot.className = 'dsh-ct-region'
               listRoot.setAttribute('data-plugin', name)
-            region.appendChild(listRoot)
               const hostApi = require('react-dom/client')
               appRoot = hostApi.createRoot(listRoot)
               appRoot.render(h(CronApp, { t, faces }))
             }
+            if (listRoot.parentElement !== region) region.appendChild(listRoot)
+          }
 
           hideNativeCronRows(sidebar)
           if (sidebar) {

test/package.test.js

@@ -61,6 +61,9 @@ test('installable bundle declares host apply, client half, unique id, and no @de
   assert.match(client, /centerCol/)
   assert.match(client, /data-dsh-ct-host/)
   assert.match(client, /_collapsed"\]\[data-dsh-ct-mode=on\] \.dsh-ct-region/)
+  assert.match(client, /listRoot\.parentElement !== region\) region\.appendChild\(listRoot\)/)
+  assert.match(client, /jobStamp/)
+  assert.doesNotMatch(client, /\[data-dsh-ct-mode=on\] \.dsh-ct-region\{display:flex !important;animation:/)
   assert.match(client, /visibility:hidden/)
   assert.match(client, /createPortal\(editor, paneHost\)/)
   assert.match(client, /sidebarCollapsed/)