✨ feat(vscode): webview 移交/接管按钮、选人弹窗与待接管角标

Claude-Session: https://claude.ai/code/session_011cEyL6k351U2BzX1Qmygph

vscode/webview-ui/src/components/IssueDetailPanel.tsx

@@ -1,6 +1,6 @@
 import type { ReactNode } from 'react'
 import { useMemo, useRef } from 'react'
-import { CircleSlash, ExternalLink, GitMerge, Play, RotateCcw, Terminal, Trash2, X } from 'lucide-react'
+import { ArrowRightLeft, CircleSlash, Download, ExternalLink, GitMerge, Loader2, Play, RotateCcw, Terminal, Trash2, X } from 'lucide-react'
 import type { ClaudeProfile } from '../hooks/useIssues'
 import type { Issue, IssueColumn } from '../types'
 import { COLUMN_LABELS, COLUMN_ORDER } from '../types'
@@ -90,6 +90,11 @@ interface IssueDetailPanelProps {
   onUpdateTestProfilePath: (issueNumber: number, testProfilePath: string) => void
   /** Open the in-webview log modal. */
   onOpenLogs: () => void
+  /** 当前 Gitea login；undefined = 身份未知（接管按钮不显示）。 */
+  me?: string
+  onStartHandoff: (issueNumber: number) => void
+  onAcceptHandoff: (issueNumber: number) => void
+  isHandoffRunning: (issueNumber: number) => boolean
 }
 
 /**
@@ -128,6 +133,10 @@ export function IssueDetailPanel({
   onUpdateBrainstormProfilePath,
   onUpdateTestProfilePath,
   onOpenLogs,
+  me,
+  onStartHandoff,
+  onAcceptHandoff,
+  isHandoffRunning,
 }: IssueDetailPanelProps) {
   // 前置工单未完成 → 锁定。锁定时禁用"实施"等启动新工作的动作按钮，
   // 但已存在的会话恢复链接保持可用（属于用户已操作过的入口）。
@@ -575,6 +584,36 @@ export function IssueDetailPanel({
             avoid acting on a gitea issue of the same number. */}
         {issue.source !== 'youtrack' && (
           <>
+            {issue.handoffAttachmentId && me !== undefined && (issue.assignees ?? []).includes(me) && (
+              <button
+                type="button"
+                disabled={isHandoffRunning(issue.number)}
+                onClick={() => onAcceptHandoff(issue.number)}
+                title={`接管（${issue.handoffFrom ?? '?'} 移交）`}
+                aria-label="接管"
+                className="inline-flex shrink-0 items-center gap-1 rounded border border-green-500/60 bg-green-500/10 px-2 py-1 text-xs text-green-500 hover:bg-green-500/20 disabled:opacity-50"
+              >
+                {isHandoffRunning(issue.number) ? <Loader2 className="size-3.5 animate-spin" /> : <Download className="size-3.5" />}
+                接管
+              </button>
+            )}
+            {!issue.handoffAttachmentId && issue.column !== 'done' && (
+              <button
+                type="button"
+                disabled={isHandoffRunning(issue.number)}
+                onClick={() => onStartHandoff(issue.number)}
+                title="移交给同事"
+                aria-label="移交"
+                className="inline-flex shrink-0 items-center justify-center rounded border border-[var(--vscode-panel-border)] p-1 text-xs text-[var(--vscode-foreground)] hover:border-blue-500/60 hover:bg-blue-500/10 hover:text-blue-500 disabled:opacity-50"
+              >
+                {isHandoffRunning(issue.number) ? <Loader2 className="size-3.5 animate-spin" /> : <ArrowRightLeft className="size-3.5" />}
+              </button>
+            )}
+            {issue.handoffAttachmentId && !(me !== undefined && (issue.assignees ?? []).includes(me)) && (
+              <span className="inline-flex shrink-0 items-center rounded border border-[var(--vscode-panel-border)] px-1.5 py-0.5 text-[10px] opacity-70" title={`${issue.handoffFrom ?? '?'} 已移交，等待 ${(issue.assignees ?? []).join(', ') || '?'} 接管`}>
+                待接管
+              </span>
+            )}
             {(issue.column === 'in-progress' || issue.column === 'review') && (
               <button
                 type="button"