⚡ 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/components/IssueDetailPanel.tsx

@@ -39,6 +39,8 @@ interface IssueDetailPanelProps {
   globalAutoReview: boolean
   onOpenInBrowser: (url: string) => void
   onResumeSession: (sessionId: string, kind: 'implement' | 'brainstorm', profilePath?: string, cwd?: string, issueNumber?: number) => void
+  /** 会话 id 行的 spinner：该会话的开 tab 请求还没被扩展处理完就为 true。 */
+  isSessionTabPending: (sessionId: string) => boolean
   /**
    * Open a new terminal that runs `codex resume <id>` for the auto-review
    * conversation associated with this issue.
@@ -153,6 +155,7 @@ export function IssueDetailPanel({
   onUpdateTestProfilePath,
   onOpenLogs,
   me,
+  isSessionTabPending,
   onStartHandoff,
   onAcceptHandoff,
   isHandoffRunning,
@@ -252,6 +255,7 @@ export function IssueDetailPanel({
               key: 'sessionId',
               label: '头脑风暴会话id',
               type: 'action' as const,
+              pending: hasSession ? isSessionTabPending(issue!.sessionId!) : false,
               description: hasSession
                 ? '双击在新终端运行 claude --resume <id> 恢复对话；点 ▶ 续聊'
                 : '工单尚未关联 cc 会话；点 ▶ 新开一个规划会话并续聊',
@@ -274,6 +278,7 @@ export function IssueDetailPanel({
             key: 'implementSessionId',
             label: '实施会话id',
             type: 'action',
+            pending: issue?.implementSessionId ? isSessionTabPending(issue.implementSessionId) : false,
             description: issue?.worktreeExists
               ? '双击在新终端运行 claude --resume <id> 恢复实施对话（cwd 为 worktree）'
               : 'worktree 已清理，将在工作区根目录恢复（cc 可能提示原 cwd 不存在）',
@@ -298,6 +303,7 @@ export function IssueDetailPanel({
                 key: 'reviewSessionId',
                 label: '审查会话id',
                 type: 'action',
+                pending: issue.reviewSessionId ? isSessionTabPending(issue.reviewSessionId) : false,
                 description: '双击在新终端运行 codex resume <id> 查看审查会话（worktree 在则用之，否则工作区根目录）',
                 actionIcon: <Terminal className="size-3.5" />,
                 onAction: (v) => {
@@ -355,6 +361,7 @@ export function IssueDetailPanel({
               key: 'testSessionId',
               label: '测试会话id',
               type: 'action' as const,
+              pending: hasSession ? isSessionTabPending(issue!.testSessionId!) : false,
               description: hasSession
                 ? '双击在新终端运行 claude --resume <id> 在工作区根（main）恢复测试对话'
                 : '工单 PR 合并后点击右侧 ▶ 在工作区根（main）启动一个测试 cc tab（让 cc 了解代码后告诉你怎么测试）',
@@ -535,7 +542,7 @@ export function IssueDetailPanel({
         ],
       },
     ],
-    [onResumeSession, onResumeReviewSession, onResumeTestSession, onStartTestSession, onOpenFile, onImplement, onOpenPr, onGeneratePrDiffSummary, onOpenWorktree, onDeleteWorktree, onMergeBranch, onCloseSessionTab, onContinueBrainstorm, onClearBrainstormSession, onOpenLogs, issue, locked, lockTitle, globalAutoReview, prDiffSummaryRunning, profiles],
+    [onResumeSession, onResumeReviewSession, onResumeTestSession, onStartTestSession, onOpenFile, onImplement, onOpenPr, onGeneratePrDiffSummary, onOpenWorktree, onDeleteWorktree, onMergeBranch, onCloseSessionTab, onContinueBrainstorm, onClearBrainstormSession, onOpenLogs, issue, locked, lockTitle, globalAutoReview, prDiffSummaryRunning, profiles, isSessionTabPending],
   )
 
   // 同事的工单只读：属性表统一消毒，顶部只留查看类按钮。