✨ 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/IssueCard.tsx

@@ -67,6 +67,16 @@ export const IssueCard = forwardRef<HTMLDivElement, IssueCardProps>(
               </span>
             )
           : null}
+        {issue.handoffAttachmentId
+          ? (
+              <span
+                className="absolute bottom-1 right-1.5 rounded border border-blue-400/50 bg-blue-400/10 px-1 text-[9px] text-blue-400"
+                title={`${issue.handoffFrom ?? '?'} 已移交，待接管`}
+              >
+                待接管
+              </span>
+            )
+          : null}
         <div className={cn('truncate', locked && 'pr-5')}>
           <span className="font-mono opacity-60">
             {issue.source === 'youtrack' ? issue.externalId : `#${issue.number}`}