fix: optimize leaderboard and agent handoff

frontend-web/src/pages/AdminUserLeaderboardPage.tsx

@@ -39,6 +39,7 @@ import {
   DialogTrigger,
 } from "@/components/ui/dialog";
 import { Input } from "@/components/ui/input";
+import { Pagination } from "@/components/ui/pagination";
 import { ScrollArea } from "@/components/ui/scroll-area";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
@@ -63,6 +64,7 @@ type UserRankTab = "activity" | "questions" | "tokens" | "skills" | "efficiency"
 type RangeState = { since: string; until: string; days?: number };
 type LeaderboardAccent = "crimson" | "rose" | "amber" | "teal";
 const DEFAULT_REPORT_MODEL = "__default__";
+const LEADERBOARD_PAGE_SIZE = 20;
 
 const accentClasses: Record<LeaderboardAccent, { soft: string; text: string; bar: string; border: string }> = {
   crimson: {
@@ -722,11 +724,13 @@ function UserTable({
   users,
   tab,
   selectedUserId,
+  rankOffset = 0,
   onSelect,
 }: {
   users: AdminLeaderboardUser[];
   tab: UserRankTab;
   selectedUserId: string | null;
+  rankOffset?: number;
   onSelect: (user: AdminLeaderboardUser) => void;
 }) {
   const max = Math.max(1, ...users.map((user) => userScore(user, tab)));
@@ -749,7 +753,7 @@ function UserTable({
             )}
           >
             <div className="flex size-8 items-center justify-center rounded-md bg-[#FFF1F1] text-sm font-semibold text-[#C1121F] dark:bg-[#3A1215] dark:text-[#F2B8BB]">
-              {index + 1}
+              {rankOffset + index + 1}
             </div>
             <div className="min-w-0">
               <div className="flex items-center gap-2">
@@ -1041,6 +1045,7 @@ export default function AdminUserLeaderboardPage() {
   const [groupRules, setGroupRules] = useState("zero,two");
   const [showGroupStats, setShowGroupStats] = useState(false);
   const [selectedUserId, setSelectedUserId] = useState<string | null>(null);
+  const [userPage, setUserPage] = useState(1);
   const apiRange = useMemo(
     () => rangeForApi(range),
     [range],
@@ -1083,6 +1088,19 @@ export default function AdminUserLeaderboardPage() {
 
   const overview = data?.overview;
   const topUsers = rankedUsers.slice(0, 3);
+  const userPageCount = Math.max(1, Math.ceil(rankedUsers.length / LEADERBOARD_PAGE_SIZE));
+  const visibleUsers = useMemo(() => {
+    const start = (userPage - 1) * LEADERBOARD_PAGE_SIZE;
+    return rankedUsers.slice(start, start + LEADERBOARD_PAGE_SIZE);
+  }, [rankedUsers, userPage]);
+
+  useEffect(() => {
+    setUserPage(1);
+  }, [apiRange.since, apiRange.until, query, tab]);
+
+  useEffect(() => {
+    setUserPage((page) => Math.min(page, userPageCount));
+  }, [userPageCount]);
 
   useEffect(() => {
     if (rankedUsers.length === 0) {
@@ -1411,9 +1429,14 @@ export default function AdminUserLeaderboardPage() {
         <ScrollArea className="min-h-0 flex-1">
           <div className="space-y-5 p-6">
             {isLoading && (
-              <div className="flex items-center justify-center gap-2 py-20 text-sm text-[#5F6368]">
+              <div className="flex flex-col items-center justify-center gap-3 py-20 text-center text-sm text-[#5F6368]">
-                <Loader2 className="size-4 animate-spin" />
+                <div className="flex items-center gap-2">
-                加载统计数据
+                  <Loader2 className="size-4 animate-spin" />
+                  <span>正在统计排行榜数据</span>
+                </div>
+                <div className="max-w-md text-xs leading-5 text-[#7A5A5A] dark:text-[#D8B8B8]">
+                  线上用户较多或时间范围较大时，统计时间可能较长，请耐心等待。为避免影响其他接口，系统会限制排行榜统计的并发数量。
+                </div>
               </div>
             )}
 
@@ -1492,11 +1515,23 @@ export default function AdminUserLeaderboardPage() {
                       </div>
                     </div>
                     <UserTable
-                      users={rankedUsers}
+                      users={visibleUsers}
                       tab={tab}
                       selectedUserId={selectedUserId}
+                      rankOffset={(userPage - 1) * LEADERBOARD_PAGE_SIZE}
                       onSelect={(user) => setSelectedUserId(user.user_id)}
                     />
+                    <div className="flex flex-wrap items-center justify-between gap-3 text-xs text-[#6B7280] dark:text-slate-400">
+                      <span>
+                        共 {fmtNumber(rankedUsers.length)} 位用户，当前第 {userPage} / {userPageCount} 页
+                      </span>
+                      <Pagination
+                        page={userPage}
+                        pageSize={LEADERBOARD_PAGE_SIZE}
+                        total={rankedUsers.length}
+                        onPageChange={setUserPage}
+                      />
+                    </div>
                   </section>
 
                   <section className="overflow-hidden rounded-lg border border-[#F1D6D6] bg-white shadow-sm dark:border-[#462123] dark:bg-[#230D0F]">

frontend-web/src/pages/AgentChatPage.tsx

@@ -131,7 +131,7 @@ export default function AgentChatPage() {
   const pendingMessageHandled = useRef(false);
   useEffect(() => {
     if (pendingMessageHandled.current) return;
-    if (!agent_id || !isNewThread || hasStartedConversation) return;
+    if (!agent_id || !isNewThread) return;
     let pending: { agentId?: string; text?: string } | null = null;
     try {
       const raw = sessionStorage.getItem("pendingAgentMessage");
@@ -143,7 +143,7 @@ export default function AgentChatPage() {
     pendingMessageHandled.current = true;
     sessionStorage.removeItem("pendingAgentMessage");
     handleSubmit({ text: pending.text, files: [] });
-  }, [agent_id, isNewThread, hasStartedConversation, handleSubmit]);
+  }, [agent_id, isNewThread, handleSubmit]);
 
   const handleClarificationSubmit = useCallback(
     (answer: string) => {

offline-backend-20260512/backend/app/gateway/routers/admin_users.py

@@ -13,8 +13,10 @@ methods' ``user_id`` parameter is designed for.
 
 from __future__ import annotations
 
+import asyncio
 import json
 import logging
+import os
 import re
 from collections.abc import AsyncIterator
 from difflib import SequenceMatcher
@@ -53,6 +55,20 @@ from deerflow.persistence.user.model import UserRow
 logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/api/admin/users", tags=["admin-users"])
 
+_LEADERBOARD_MAX_CONCURRENT = max(
+    1,
+    int(os.getenv("ADMIN_LEADERBOARD_MAX_CONCURRENT", "1")),
+)
+_LEADERBOARD_TIMEOUT_SECONDS = max(
+    5.0,
+    float(os.getenv("ADMIN_LEADERBOARD_TIMEOUT_SECONDS", "45")),
+)
+_LEADERBOARD_ACQUIRE_TIMEOUT_SECONDS = max(
+    0.1,
+    float(os.getenv("ADMIN_LEADERBOARD_ACQUIRE_TIMEOUT_SECONDS", "0.5")),
+)
+_leaderboard_semaphore = asyncio.Semaphore(_LEADERBOARD_MAX_CONCURRENT)
+
 
 async def _require_admin(request: Request) -> None:
     """Reject non-admin callers. In no-auth mode there is no user → allow."""
@@ -983,59 +999,84 @@ async def get_user_leaderboard(
     if session_factory is None:
         raise HTTPException(status_code=503, detail="Analytics requires database persistence")
 
-    settings = load_system_settings().leaderboard
+    try:
-    since_dt, until_dt, range_days = _resolve_range(days, since, until)
+        await asyncio.wait_for(
-    excluded = {uid for uid in settings.exclude_user_ids if uid}
+            _leaderboard_semaphore.acquire(),
-    excluded.update({uid for uid in (exclude_user_ids or []) if uid})
+            timeout=_LEADERBOARD_ACQUIRE_TIMEOUT_SECONDS,
-    include_scheduled = settings.include_scheduled if include_scheduled is None else include_scheduled
+        )
-    include_admins = settings.include_admins if include_admins is None else include_admins
+    except TimeoutError as exc:
-    include_failed = settings.include_failed if include_failed is None else include_failed
+        raise HTTPException(
-    async with session_factory() as session:
+            status_code=429,
-        common = {
+            detail="排行榜正在统计中，请稍后再试。线上用户较多时统计时间可能较长，请耐心等待。",
-            "exclude_user_ids": excluded,
+        ) from exc
-            "include_scheduled": include_scheduled,
-            "include_admins": include_admins,
-            "include_failed": include_failed,
-        }
-        tool_common = {
-            "exclude_user_ids": excluded,
-            "include_scheduled": include_scheduled,
-            "include_admins": include_admins,
-        }
-        question_common = {
-            **common,
-            "cleanup_system_questions": settings.cleanup_system_questions,
-        }
-        overview = await _query_overview(session, since_dt, until_dt, **common)
-        users = await _query_user_leaderboard(session, since_dt, until_dt, **common)
-        skills = await _query_call_rankings(session, since_dt, until_dt, user_id=None, field="skill", limit=limit, **tool_common)
-        tools = await _query_call_rankings(session, since_dt, until_dt, user_id=None, field="tool", limit=limit, **tool_common)
-        models = await _query_model_rankings(session, since_dt, until_dt, user_id=None, limit=limit, **common)
-        if not models:
-            models = await _query_run_dimensions(session, since_dt, until_dt, user_id=None, field="model", limit=limit, **common)
-        agents = await _query_run_dimensions(session, since_dt, until_dt, user_id=None, field="agent", limit=limit, **common)
-        run_statuses = await _query_run_dimensions(session, since_dt, until_dt, user_id=None, field="status", limit=limit, **common)
-        recent_questions = await _query_recent_questions(session, since_dt, until_dt, user_id=None, limit=limit, **question_common)
-        frequent_questions = await _query_frequent_questions(session, since_dt, until_dt, limit=limit, **question_common)
-        trends = await _query_trends(session, since_dt, until_dt, **common)
 
-    return AdminLeaderboardResponse(
+    async def build_response() -> AdminLeaderboardResponse:
-        range_days=range_days,
+        settings = load_system_settings().leaderboard
-        since=_iso(since_dt),
+        since_dt, until_dt, range_days = _resolve_range(days, since, until)
-        until=_iso(until_dt),
+        excluded = {uid for uid in settings.exclude_user_ids if uid}
-        overview=overview,
+        excluded.update({uid for uid in (exclude_user_ids or []) if uid})
-        users_by_activity=sorted(users, key=lambda u: (u.run_count + u.tool_call_count, u.total_tokens), reverse=True)[:limit],
+        resolved_include_scheduled = settings.include_scheduled if include_scheduled is None else include_scheduled
-        users_by_questions=sorted(users, key=lambda u: (u.qa_count, u.run_count), reverse=True)[:limit],
+        resolved_include_admins = settings.include_admins if include_admins is None else include_admins
-        users_by_tokens=sorted(users, key=lambda u: u.total_tokens, reverse=True)[:limit],
+        resolved_include_failed = settings.include_failed if include_failed is None else include_failed
-        skills=skills,
+        async with session_factory() as session:
-        tools=tools,
+            common = {
-        models=models,
+                "exclude_user_ids": excluded,
-        agents=agents,
+                "include_scheduled": resolved_include_scheduled,
-        run_statuses=run_statuses,
+                "include_admins": resolved_include_admins,
-        recent_questions=recent_questions,
+                "include_failed": resolved_include_failed,
-        frequent_questions=frequent_questions,
+            }
-        trends=trends,
+            tool_common = {
-    )
+                "exclude_user_ids": excluded,
+                "include_scheduled": resolved_include_scheduled,
+                "include_admins": resolved_include_admins,
+            }
+            question_common = {
+                **common,
+                "cleanup_system_questions": settings.cleanup_system_questions,
+            }
+            overview = await _query_overview(session, since_dt, until_dt, **common)
+            users = await _query_user_leaderboard(session, since_dt, until_dt, **common)
+            skills = await _query_call_rankings(session, since_dt, until_dt, user_id=None, field="skill", limit=limit, **tool_common)
+            tools = await _query_call_rankings(session, since_dt, until_dt, user_id=None, field="tool", limit=limit, **tool_common)
+            models = await _query_model_rankings(session, since_dt, until_dt, user_id=None, limit=limit, **common)
+            if not models:
+                models = await _query_run_dimensions(session, since_dt, until_dt, user_id=None, field="model", limit=limit, **common)
+            agents = await _query_run_dimensions(session, since_dt, until_dt, user_id=None, field="agent", limit=limit, **common)
+            run_statuses = await _query_run_dimensions(session, since_dt, until_dt, user_id=None, field="status", limit=limit, **common)
+            recent_questions = await _query_recent_questions(session, since_dt, until_dt, user_id=None, limit=limit, **question_common)
+            frequent_questions = await _query_frequent_questions(session, since_dt, until_dt, limit=limit, **question_common)
+            trends = await _query_trends(session, since_dt, until_dt, **common)
+
+        return AdminLeaderboardResponse(
+            range_days=range_days,
+            since=_iso(since_dt),
+            until=_iso(until_dt),
+            overview=overview,
+            users_by_activity=sorted(users, key=lambda u: (u.run_count + u.tool_call_count, u.total_tokens), reverse=True)[:limit],
+            users_by_questions=sorted(users, key=lambda u: (u.qa_count, u.run_count), reverse=True)[:limit],
+            users_by_tokens=sorted(users, key=lambda u: u.total_tokens, reverse=True)[:limit],
+            skills=skills,
+            tools=tools,
+            models=models,
+            agents=agents,
+            run_statuses=run_statuses,
+            recent_questions=recent_questions,
+            frequent_questions=frequent_questions,
+            trends=trends,
+        )
+
+    try:
+        return await asyncio.wait_for(
+            build_response(),
+            timeout=_LEADERBOARD_TIMEOUT_SECONDS,
+        )
+    except TimeoutError as exc:
+        raise HTTPException(
+            status_code=504,
+            detail="排行榜统计时间过长，请缩短时间范围后重试，或稍后再查看。",
+        ) from exc
+    finally:
+        _leaderboard_semaphore.release()
 
 
 async def _build_leaderboard_report_prompt(