fix(web): replayed tool call after resume reuses its card (duplicate React key)

A suspended agent.propose_options / approval call is replayed on resume with the
same toolCallId; foldEvents pushed a second item with the same key, which also
inflated the tool call meter. Also use 「」 in the report footnote.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/components/agent/agent-conversation.tsx

@@ -789,7 +789,7 @@ export function FinalReport({
             ) : null}
             <p className="mt-2 text-meta text-muted-foreground">
               取自下载计划、下载任务和整理记录（生成于 {formatDateTime(report.generatedAt)}
-              ）。"已提交"指已进入下载器，整理成功才算入库。
+              ）。「已提交」指已进入下载器，整理成功才算入库。
             </p>
           </>
         ) : (