⚡ perf(vscode): 开会话去掉多余远程往返，spinner 跟随真实进度

开会话原先要先全量拉工单（含每张工单的评论、依赖、PR）做前置锁检查，
再各读一次 state JSON 给 pre-create 钩子和终端图标，几秒后才 createTerminal。

- 锁检查改用主进程已算好的工单快照，快照里没有该工单才回落全量拉取
- state JSON 一次读两处用，且提前发起与本地准备重叠
- 会话行 spinner 由扩展的 session/tab-settled 消息驱动，不再是固定 1.5s 假动画，
  消息丢失时 60s 超时兜底

Claude-Session: https://claude.ai/code/session_01Kgmb1LvrPmFX3NoUDB4zZC

vscode/webview-ui/src/hooks/useIssues.ts

@@ -184,6 +184,8 @@ export interface UseIssuesResult {
   dismissToast: (id: string) => void
   openUrl: (url: string) => void
   resumeSession: (sessionId: string, kind: 'implement' | 'brainstorm', profilePath?: string, cwd?: string, issueNumber?: number) => void
+  /** 该会话 id 的开 tab 请求还没被扩展处理完 → 行内转 spinner。 */
+  isSessionTabPending: (sessionId: string) => boolean
   resumeReviewSession: (sessionId: string, issueNumber: number, cwd?: string) => void
   startTestSession: (issueNumber: number) => void
   resumeTestSession: (sessionId: string, issueNumber: number, cwd?: string) => void
@@ -479,6 +481,50 @@ export function useIssues(): UseIssuesResult {
     postMessage({ type: 'toast/open-url', url })
   }, [])
 
+  // 开 tab 是秒级操作（要读 state JSON、跑 pre-create 钩子），行内 spinner 要
+  // 真实反映进度：发请求时标 pending，扩展回 session/tab-settled 时清。消息万一
+  // 丢了就靠 PENDING_TIMEOUT_MS 兜底，spinner 不会永远转下去。
+  const [pendingSessionTabs, setPendingSessionTabs] = useState<Set<string>>(() => new Set())
+  const pendingTimersRef = useRef<Map<string, number>>(new Map())
+  const PENDING_TIMEOUT_MS = 60_000
+
+  const clearSessionTabPending = useCallback((sessionId: string): void => {
+    const timer = pendingTimersRef.current.get(sessionId)
+    if (timer !== undefined) {
+      window.clearTimeout(timer)
+      pendingTimersRef.current.delete(sessionId)
+    }
+    setPendingSessionTabs((prev) => {
+      if (!prev.has(sessionId))
+        return prev
+      const next = new Set(prev)
+      next.delete(sessionId)
+      return next
+    })
+  }, [])
+
+  const markSessionTabPending = useCallback((sessionId: string): void => {
+    const existing = pendingTimersRef.current.get(sessionId)
+    if (existing !== undefined)
+      window.clearTimeout(existing)
+    pendingTimersRef.current.set(
+      sessionId,
+      window.setTimeout(() => clearSessionTabPending(sessionId), PENDING_TIMEOUT_MS),
+    )
+    setPendingSessionTabs(prev => new Set(prev).add(sessionId))
+  }, [clearSessionTabPending])
+
+  const isSessionTabPending = useCallback(
+    (sessionId: string): boolean => pendingSessionTabs.has(sessionId),
+    [pendingSessionTabs],
+  )
+
+  useEffect(() => () => {
+    for (const timer of pendingTimersRef.current.values())
+      window.clearTimeout(timer)
+    pendingTimersRef.current.clear()
+  }, [])
+
   const resumeSession = useCallback((
     sessionId: string,
     kind: 'implement' | 'brainstorm',
@@ -486,24 +532,27 @@ export function useIssues(): UseIssuesResult {
     cwd?: string,
     issueNumber?: number,
   ): void => {
+    markSessionTabPending(sessionId)
     postMessage({ type: 'session/resume', sessionId, kind, profilePath, cwd, issueNumber })
-  }, [])
+  }, [markSessionTabPending])
 
   const focusSession = useCallback((issueNumber: number): void => {
     postMessage({ type: 'session/focus', issueNumber })
   }, [])
 
   const resumeReviewSession = useCallback((sessionId: string, issueNumber: number, cwd?: string): void => {
+    markSessionTabPending(sessionId)
     postMessage({ type: 'session/resume-review', sessionId, issueNumber, cwd })
-  }, [])
+  }, [markSessionTabPending])
 
   const startTestSession = useCallback((issueNumber: number): void => {
     postMessage({ type: 'session/start-test', issueNumber })
   }, [])
 
   const resumeTestSession = useCallback((sessionId: string, issueNumber: number, cwd?: string): void => {
+    markSessionTabPending(sessionId)
     postMessage({ type: 'session/resume-test', sessionId, issueNumber, cwd })
-  }, [])
+  }, [markSessionTabPending])
 
   const openFile = useCallback((path: string): void => {
     postMessage({ type: 'editor/open-file', path })
@@ -722,6 +771,9 @@ export function useIssues(): UseIssuesResult {
   useEffect(() => {
     const cleanup = onMessage((msg) => {
       switch (msg.type) {
+        case 'session/tab-settled':
+          clearSessionTabPending(msg.sessionId)
+          break
         case 'issues/loading':
           setRefreshing(true)
           setState(prev => prev.status === 'ready' ? prev : { status: 'loading' })
@@ -938,5 +990,5 @@ export function useIssues(): UseIssuesResult {
     return cleanup
   }, [clearPrDiffSummaryRunning, markHandoffRunning])
 
-  return { state, settings, avatars, globalAutoReview, youtrackConfigured, importYouTrack, toasts, profiles, setIssues, refresh, refreshing, scope, toggleScope, saveSettings, listYouTrackProjects, youtrackProjects, dismissSettings, requestEditAuth, createIssue, dismissToast, openUrl, resumeSession, resumeReviewSession, startTestSession, resumeTestSession, focusSession, openFile, implement, generatePrDiffSummary, isPrDiffSummaryRunning, openPr, openWorktree, deleteWorktree, mergeBranch, deleteIssue, closeIssue, closeSessionTab, continueBrainstorm, changeColumn, setDependency, clearDependency, updateIssueAutoReview, updateIssueProfilePath, updateIssueBrainstormProfilePath, clearBrainstormSession, updateIssueTestProfilePath, logs, fetchLogs, clearLogs, pendingSelectId, clearPendingSelect, commitRunning, runCommit, hasChanges, release, runRelease, cherryPick, dismissCherryPick, confirmCherryPick, envLocked, envFileCount, envLockRunning, envLockTitle, toggleEnvLock, me, handoffUsers, requestHandoffUsers, startHandoff, acceptHandoff, isHandoffRunning }
+  return { state, settings, avatars, isSessionTabPending, globalAutoReview, youtrackConfigured, importYouTrack, toasts, profiles, setIssues, refresh, refreshing, scope, toggleScope, saveSettings, listYouTrackProjects, youtrackProjects, dismissSettings, requestEditAuth, createIssue, dismissToast, openUrl, resumeSession, resumeReviewSession, startTestSession, resumeTestSession, focusSession, openFile, implement, generatePrDiffSummary, isPrDiffSummaryRunning, openPr, openWorktree, deleteWorktree, mergeBranch, deleteIssue, closeIssue, closeSessionTab, continueBrainstorm, changeColumn, setDependency, clearDependency, updateIssueAutoReview, updateIssueProfilePath, updateIssueBrainstormProfilePath, clearBrainstormSession, updateIssueTestProfilePath, logs, fetchLogs, clearLogs, pendingSelectId, clearPendingSelect, commitRunning, runCommit, hasChanges, release, runRelease, cherryPick, dismissCherryPick, confirmCherryPick, envLocked, envFileCount, envLockRunning, envLockTitle, toggleEnvLock, me, handoffUsers, requestHandoffUsers, startHandoff, acceptHandoff, isHandoffRunning }
 }