enhance leaderboard reporting and grouping

frontend-web/src/core/admin/api.ts

@@ -133,6 +133,11 @@ export interface AdminUserAnalyticsResponse {
   trends: AdminLeaderboardTrendPoint[];
 }
 
+export interface AdminLeaderboardReportResponse {
+  report: string;
+  generated_at: string;
+}
+
 const base = () => `${getBackendBaseURL()}/api/admin/users`;
 
 async function parse<T>(res: Response, what: string): Promise<T> {
@@ -208,6 +213,24 @@ export async function getUserAnalytics(
   );
 }
 
+export async function generateUserLeaderboardReport(
+  range: { since: string; until: string; days?: number },
+  limit = 30,
+): Promise<AdminLeaderboardReportResponse> {
+  const params = new URLSearchParams({
+    days: String(range.days ?? 30),
+    since: range.since,
+    until: range.until,
+    limit: String(limit),
+  });
+  return parse(
+    await apiFetch(`${base()}/leaderboard/report?${params}`, {
+      method: "POST",
+    }),
+    "Failed to generate leaderboard report",
+  );
+}
+
 export async function addAdminMemoryEntry(
   userId: string,
   content: string,

frontend-web/src/core/admin/hooks.ts

@@ -5,6 +5,7 @@ import {
   addAdminV1Fact,
   deleteAdminMemoryEntry,
   deleteAdminV1Fact,
+  generateUserLeaderboardReport,
   getUserMemory,
   getUserAnalytics,
   getUserLeaderboard,
@@ -47,6 +48,18 @@ export function useUserAnalytics(
   });
 }
 
+export function useGenerateUserLeaderboardReport() {
+  return useMutation({
+    mutationFn: ({
+      range,
+      limit,
+    }: {
+      range: { since: string; until: string; days?: number };
+      limit?: number;
+    }) => generateUserLeaderboardReport(range, limit ?? 30),
+  });
+}
+
 /** Threads owned by a given user. Disabled until a user is picked. */
 export function useUserThreads(userId: string | null) {
   return useQuery({

frontend-web/src/pages/AdminUserLeaderboardPage.tsx

@@ -40,7 +40,7 @@ import {
 } from "@/components/ui/dialog";
 import { Input } from "@/components/ui/input";
 import { ScrollArea } from "@/components/ui/scroll-area";
-import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
+import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import type {
   AdminLeaderboardDimension,
   AdminLeaderboardOverview,
@@ -49,7 +49,7 @@ import type {
   AdminLeaderboardTrendPoint,
   AdminLeaderboardUser,
 } from "@/core/admin/api";
-import { useUserAnalytics, useUserLeaderboard } from "@/core/admin/hooks";
+import { useGenerateUserLeaderboardReport, useUserAnalytics, useUserLeaderboard } from "@/core/admin/hooks";
 import { cn } from "@/lib/utils";
 
 type UserRankTab = "activity" | "questions" | "tokens" | "skills" | "efficiency";
@@ -189,37 +189,36 @@ function exportUsersCsv(users: AdminLeaderboardUser[], tab: UserRankTab) {
   );
 }
 
-function exportReport(data: {
-  overview: AdminLeaderboardOverview;
-  users: AdminLeaderboardUser[];
-  skills: AdminLeaderboardSkill[];
-  models: AdminLeaderboardDimension[];
-  questions: AdminLeaderboardQuestion[];
-  range: RangeState;
-}) {
-  const lines = [
-    `用户排行榜统计报告`,
-    `时间范围：${data.range.since} 至 ${data.range.until}`,
-    ``,
-    `总用户：${fmtNumber(data.overview.total_users)}`,
-    `活跃用户：${fmtNumber(data.overview.active_users)}`,
-    `使用次数：${fmtNumber(data.overview.total_runs)}`,
-    `问答次数：${fmtNumber(data.overview.total_questions)}`,
-    `Token：${fmtNumber(data.overview.total_tokens)}`,
-    ``,
-    `Top 用户`,
-    ...data.users.slice(0, 10).map((user, index) => `${index + 1}. ${user.email || user.user_id} - 使用 ${fmtNumber(user.run_count)} / 问答 ${fmtNumber(user.qa_count)} / Token ${fmtNumber(user.total_tokens)}`),
-    ``,
-    `Top 技能`,
-    ...data.skills.slice(0, 10).map((item, index) => `${index + 1}. ${item.name} - ${fmtNumber(item.call_count)} 次`),
-    ``,
-    `Top 模型`,
-    ...data.models.slice(0, 10).map((item, index) => `${index + 1}. ${item.name} - ${fmtNumber(item.count)} 次 / Token ${fmtNumber(item.total_tokens)}`),
-    ``,
-    `近期问题`,
-    ...data.questions.slice(0, 10).map((item, index) => `${index + 1}. ${item.text}`),
-  ];
-  downloadText(`user-leaderboard-report-${new Date().toISOString().slice(0, 10)}.txt`, lines.join("\n"));
+function parseGroupRules(value: string): string[] {
+  return value
+    .split(/[\n,，;；\s]+/)
+    .map((item) => item.trim())
+    .filter(Boolean);
+}
+
+function userGroupKey(user: AdminLeaderboardUser, rules: string[]): string {
+  const source = `${user.email || ""} ${user.user_id || ""}`.toLowerCase();
+  const matched = rules.find((rule) => source.includes(rule.toLowerCase()));
+  return matched || "其他";
+}
+
+function buildGroupStats(users: AdminLeaderboardUser[], rules: string[]) {
+  const groups = new Map<string, AdminLeaderboardUser[]>();
+  for (const user of users) {
+    const key = userGroupKey(user, rules);
+    groups.set(key, [...(groups.get(key) || []), user]);
+  }
+  return [...groups.entries()]
+    .map(([name, members]) => ({
+      name,
+      members: members.sort((a, b) => userScore(b, "activity") - userScore(a, "activity")),
+      userCount: members.length,
+      runs: members.reduce((sum, user) => sum + user.run_count, 0),
+      questions: members.reduce((sum, user) => sum + user.qa_count, 0),
+      tokens: members.reduce((sum, user) => sum + user.total_tokens, 0),
+      skills: members.reduce((sum, user) => sum + user.skill_call_count, 0),
+    }))
+    .sort((a, b) => b.runs + b.questions - (a.runs + a.questions));
 }
 
 function initials(user: AdminLeaderboardUser): string {
@@ -282,6 +281,73 @@ function InsightStrip({ overview }: { overview: AdminLeaderboardOverview }) {
   );
 }
 
+function GroupComparison({
+  users,
+  rulesText,
+  onRulesChange,
+  onSelectUser,
+}: {
+  users: AdminLeaderboardUser[];
+  rulesText: string;
+  onRulesChange: (value: string) => void;
+  onSelectUser: (user: AdminLeaderboardUser) => void;
+}) {
+  const rules = parseGroupRules(rulesText);
+  const groups = buildGroupStats(users, rules);
+
+  return (
+    <section className="rounded-lg border border-[#F1D6D6] bg-white p-4 shadow-sm dark:border-[#462123] dark:bg-[#230D0F]">
+      <div className="mb-4 flex flex-wrap items-start justify-between gap-3">
+        <div>
+          <div className="flex items-center gap-2 font-semibold text-[#231815] dark:text-white">
+            <Users className="size-4 text-[#C1121F]" />
+            分组统计
+          </div>
+          <p className="mt-1 text-sm text-[#7A5A5A] dark:text-[#D8B8B8]">
+            输入账号前缀或关键字，用逗号分隔，例如 zero,two；未命中的用户归入其他。
+          </p>
+        </div>
+        <Input
+          value={rulesText}
+          onChange={(event) => onRulesChange(event.target.value)}
+          placeholder="zero,two"
+          className="h-9 w-72 border-[#F1D6D6] bg-white dark:bg-[#19090A]"
+        />
+      </div>
+      <div className="grid gap-3 xl:grid-cols-3">
+        {groups.map((group) => (
+          <div key={group.name} className="rounded-lg border border-[#F1D6D6] bg-[#FFF7F7] p-3 dark:border-[#462123] dark:bg-[#19090A]">
+            <div className="mb-3 flex items-center justify-between gap-2">
+              <div className="font-semibold text-[#231815] dark:text-white">{group.name}</div>
+              <Badge variant="outline">{group.userCount} 人</Badge>
+            </div>
+            <div className="grid grid-cols-4 gap-2 text-xs">
+              <Metric label="运行" value={group.runs} />
+              <Metric label="问答" value={group.questions} />
+              <Metric label="技能" value={group.skills} />
+              <Metric label="Token" value={group.tokens} />
+            </div>
+            <div className="mt-3 space-y-1.5">
+              {group.members.slice(0, 5).map((user, index) => (
+                <button
+                  key={user.user_id}
+                  type="button"
+                  onClick={() => onSelectUser(user)}
+                  className="grid w-full grid-cols-[24px_minmax(0,1fr)_64px] items-center gap-2 rounded-md px-2 py-1.5 text-left text-xs hover:bg-white dark:hover:bg-[#230D0F]"
+                >
+                  <span className="font-semibold text-[#C1121F]">{index + 1}</span>
+                  <span className="truncate">{user.email || user.user_id}</span>
+                  <span className="text-right tabular-nums">{fmtNumber(userScore(user, "activity"))}</span>
+                </button>
+              ))}
+            </div>
+          </div>
+        ))}
+      </div>
+    </section>
+  );
+}
+
 function PodiumCard({
   user,
   rank,
@@ -342,101 +408,6 @@ function PodiumCard({
   );
 }
 
-function SpotlightCarousel({
-  users,
-  tab,
-  onSelect,
-}: {
-  users: AdminLeaderboardUser[];
-  tab: UserRankTab;
-  onSelect: (user: AdminLeaderboardUser) => void;
-}) {
-  const [index, setIndex] = useState(0);
-  const visible = users.slice(0, 5);
-  const active = visible[index % Math.max(visible.length, 1)];
-
-  useEffect(() => {
-    if (visible.length <= 1) return;
-    const timer = window.setInterval(() => {
-      setIndex((value) => (value + 1) % visible.length);
-    }, 5000);
-    return () => window.clearInterval(timer);
-  }, [visible.length]);
-
-  useEffect(() => {
-    if (index >= visible.length) setIndex(0);
-  }, [index, visible.length]);
-
-  if (!active) {
-    return (
-      <section className="rounded-lg border border-dashed border-[#DADCE0] bg-white p-5 dark:border-[#213D5E] dark:bg-[#06213F]">
-        <div className="text-sm text-[#5F6368]">暂无可轮播用户</div>
-      </section>
-    );
-  }
-
-  const maxScore = Math.max(1, ...visible.map((user) => userScore(user, tab)));
-
-  return (
-    <section className="rounded-lg border border-[#F1D6D6] bg-white p-4 shadow-sm dark:border-[#462123] dark:bg-[#230D0F]">
-      <div className="mb-3 flex items-center justify-between gap-3">
-        <div className="flex items-center gap-2 font-semibold text-[#231815] dark:text-white">
-          <Crown className="size-4 text-[#C1121F]" />
-          榜单焦点
-        </div>
-        <span className="text-xs text-[#8B6B6B]">自动轮播 Top 5</span>
-      </div>
-      <div className="grid gap-3 lg:grid-cols-[260px_minmax(0,1fr)]">
-        <button
-          type="button"
-          onClick={() => onSelect(active)}
-          className="rounded-lg border border-[#F1D6D6] bg-[#FFF7F7] p-4 text-left transition hover:border-[#C1121F] dark:border-[#462123] dark:bg-[#19090A]"
-        >
-          <div className="flex items-center gap-3">
-            <div className="flex size-11 items-center justify-center rounded-lg bg-[#C1121F] text-base font-semibold text-white">
-              {initials(active)}
-            </div>
-            <div className="min-w-0">
-              <div className="truncate font-semibold text-[#231815] dark:text-white">{active.email || active.user_id}</div>
-              <div className="mt-1 text-sm font-medium text-[#C1121F]">{scoreLabel(active, tab)}</div>
-            </div>
-          </div>
-          <div className="mt-3 h-2 overflow-hidden rounded-full bg-[#F1D6D6] dark:bg-[#462123]">
-            <div
-              className="h-full rounded-full bg-[#C1121F]"
-              style={{ width: `${Math.min(100, Math.max(8, (userScore(active, tab) / maxScore) * 100))}%` }}
-            />
-          </div>
-        </button>
-        <div className="grid gap-2 md:grid-cols-2 xl:grid-cols-5">
-          {visible.map((user, itemIndex) => (
-            <button
-              key={user.user_id}
-              type="button"
-              onClick={() => {
-                setIndex(itemIndex);
-                onSelect(user);
-              }}
-              className={cn(
-                "min-w-0 rounded-lg border px-3 py-2 text-left transition hover:border-[#C1121F]",
-                itemIndex === index
-                  ? "border-[#C1121F] bg-[#FFF1F1] dark:bg-[#3A1215]"
-                  : "border-[#F1D6D6] bg-white dark:border-[#462123] dark:bg-[#230D0F]",
-              )}
-            >
-              <div className="flex items-center justify-between gap-2">
-                <span className="text-xs font-semibold text-[#C1121F]">#{itemIndex + 1}</span>
-                <span className="text-xs font-medium tabular-nums text-[#7A5A5A] dark:text-[#D8B8B8]">{fmtNumber(userScore(user, tab))}</span>
-              </div>
-              <div className="mt-1 truncate text-sm font-medium text-[#231815] dark:text-white">{user.email || user.user_id}</div>
-            </button>
-          ))}
-        </div>
-      </div>
-    </section>
-  );
-}
-
 function TrendBars({ points }: { points: AdminLeaderboardTrendPoint[] }) {
   type TrendMetric = keyof Pick<AdminLeaderboardTrendPoint, "runs" | "questions" | "users" | "tokens">;
   const [metric, setMetric] = useState<"all" | TrendMetric>("all");
@@ -910,20 +881,34 @@ function UserDetailPanel({
           </div>
         </section>
 
-        <section className="rounded-lg border border-[#F1D6D6] bg-white p-4 dark:border-[#462123] dark:bg-[#230D0F]">
-          <div className="mb-3 flex items-center gap-2 font-semibold text-[#231815] dark:text-white">
-            <Layers3 className="size-4 text-[#C1121F]" />
-            个人维度
-          </div>
-          <div className="grid grid-cols-3 gap-2 text-sm">
-            <Metric label="模型数" value={data.models.length} />
-            <Metric label="Agent 数" value={data.agents.length} />
-            <Metric label="状态数" value={data.run_statuses.length} />
-          </div>
-        </section>
-
-        <SkillRanking title="个人常用技能" icon={Sparkles} items={data.skills.length ? data.skills : data.tools} empty="暂无技能调用" />
-        <QuestionPanel title="最近提问" items={data.recent_questions} showUser={false} />
+        <Tabs defaultValue="skills" className="space-y-3">
+          <TabsList className="mb-3">
+            <TabsTrigger value="skills">技能</TabsTrigger>
+            <TabsTrigger value="questions">提问</TabsTrigger>
+            <TabsTrigger value="trend">趋势</TabsTrigger>
+            <TabsTrigger value="dimensions">维度</TabsTrigger>
+          </TabsList>
+          <TabsContent value="skills" className="min-h-[420px]">
+            <SkillRanking title="个人常用技能" icon={Sparkles} items={data.skills.length ? data.skills : data.tools} empty="暂无技能调用" />
+          </TabsContent>
+          <TabsContent value="questions" className="min-h-[420px]">
+            <QuestionPanel title="最近提问" items={data.recent_questions} showUser={false} />
+          </TabsContent>
+          <TabsContent value="trend" className="min-h-[420px]">
+            <div className="mb-3 flex items-center gap-2 font-semibold text-[#231815] dark:text-white">
+              <TrendingUp className="size-4 text-[#C1121F]" />
+              个人使用趋势
+            </div>
+            <TrendBars points={data.trends} />
+          </TabsContent>
+          <TabsContent value="dimensions" className="min-h-[420px]">
+            <div className="grid gap-3">
+              <DimensionRanking title="个人模型" icon={Layers3} items={data.models} empty="暂无模型调用" />
+              <DimensionRanking title="个人 Agent" icon={Bot} items={data.agents} empty="暂无 Agent 运行" />
+              <DimensionRanking title="个人状态" icon={Gauge} items={data.run_statuses} empty="暂无运行状态" />
+            </div>
+          </TabsContent>
+        </Tabs>
       </div>
     </ScrollArea>
   );
@@ -934,12 +919,15 @@ export default function AdminUserLeaderboardPage() {
   const [range, setRange] = useState<RangeState>(() => defaultRange(30));
   const [tab, setTab] = useState<UserRankTab>("activity");
   const [query, setQuery] = useState("");
+  const [groupRules, setGroupRules] = useState("zero,two");
   const [selectedUserId, setSelectedUserId] = useState<string | null>(null);
   const apiRange = useMemo(
     () => rangeForApi(range),
     [range],
   );
-  const { data, isLoading, error } = useUserLeaderboard(apiRange, 30);
+  const { data, isLoading, error } = useUserLeaderboard(apiRange, 100);
+  const reportMutation = useGenerateUserLeaderboardReport();
+  const [reportOpen, setReportOpen] = useState(false);
 
   const rankedUsers = useMemo(() => {
     const base = data?.users_by_activity ?? [];
@@ -1006,10 +994,11 @@ export default function AdminUserLeaderboardPage() {
                 variant="outline"
                 size="sm"
                 onClick={() => navigate("/page/strategy/admin/user-leaderboard/settings")}
-                className="h-9"
+                className="h-9 w-9 px-0"
+                title="排行榜设置"
+                aria-label="排行榜设置"
               >
-                <Settings2 className="mr-1 size-4" />
-                排行榜设置
+                <Settings2 className="size-4" />
               </Button>
               <Button
                 variant="outline"
@@ -1021,31 +1010,74 @@ export default function AdminUserLeaderboardPage() {
                 <FileDown className="mr-1 size-4" />
                 导出 Excel
               </Button>
-              <Button
-                variant="outline"
-                size="sm"
-                disabled={!data || !overview}
-                onClick={() => {
-                  if (!data || !overview) return;
-                  exportReport({
-                    overview,
-                    users: rankedUsers,
-                    skills: data.skills,
-                    models: data.models,
-                    questions: data.recent_questions,
-                    range,
-                  });
-                }}
-                className="h-9"
-              >
-                <FileDown className="mr-1 size-4" />
-                导出报告
-              </Button>
+              <Dialog open={reportOpen} onOpenChange={setReportOpen}>
+                <DialogTrigger asChild>
+                  <Button
+                    variant="outline"
+                    size="sm"
+                    disabled={!data || reportMutation.isPending}
+                    onClick={() => reportMutation.mutate({ range: apiRange, limit: 40 })}
+                    className="h-9"
+                  >
+                    {reportMutation.isPending ? (
+                      <Loader2 className="mr-1 size-4 animate-spin" />
+                    ) : (
+                      <Sparkles className="mr-1 size-4" />
+                    )}
+                    生成报告
+                  </Button>
+                </DialogTrigger>
+                <DialogContent className="max-w-[min(920px,calc(100vw-2rem))]">
+                  <DialogHeader>
+                    <DialogTitle>AI 榜单分析报告</DialogTitle>
+                    <DialogDescription>
+                      基于当前时间段的问答、用户、技能、模型和趋势统计生成运营分析。
+                    </DialogDescription>
+                  </DialogHeader>
+                  <ScrollArea className="max-h-[70vh] rounded-lg border border-[#F1D6D6] bg-[#FFF7F7] p-4 dark:border-[#462123] dark:bg-[#19090A]">
+                    {reportMutation.isPending && (
+                      <div className="flex items-center justify-center gap-2 py-12 text-sm text-[#7A5A5A] dark:text-[#D8B8B8]">
+                        <Loader2 className="size-4 animate-spin" />
+                        正在调用大模型生成报告
+                      </div>
+                    )}
+                    {reportMutation.error && (
+                      <div className="rounded-lg border border-[#FAD2CF] bg-[#FCE8E6] p-3 text-sm text-[#DB4437] dark:border-[#DB4437]/30 dark:bg-[#DB4437]/10 dark:text-[#F28B82]">
+                        生成失败：{reportMutation.error.message}
+                      </div>
+                    )}
+                    {reportMutation.data?.report && (
+                      <pre className="whitespace-pre-wrap font-sans text-sm leading-7 text-[#231815] dark:text-white">
+                        {reportMutation.data.report}
+                      </pre>
+                    )}
+                  </ScrollArea>
+                  {reportMutation.data?.report && (
+                    <div className="flex justify-end">
+                      <Button
+                        variant="outline"
+                        onClick={() =>
+                          downloadText(
+                            `user-leaderboard-ai-report-${new Date().toISOString().slice(0, 10)}.md`,
+                            reportMutation.data.report,
+                            "text/markdown;charset=utf-8",
+                          )
+                        }
+                      >
+                        <FileDown className="mr-1 size-4" />
+                        下载报告
+                      </Button>
+                    </div>
+                  )}
+                </DialogContent>
+              </Dialog>
               <div className="flex flex-col gap-1">
                 <label className="text-xs text-[#5F6368] dark:text-slate-400">开始日期</label>
                 <Input
                   type="date"
                   value={range.since}
+                  onClick={(event) => event.currentTarget.showPicker?.()}
+                  onFocus={(event) => event.currentTarget.showPicker?.()}
                   onChange={(event) => setRange((prev) => ({ ...prev, since: event.target.value }))}
                   className="h-9 w-36 bg-white dark:bg-[#0B2A50]"
                 />
@@ -1055,6 +1087,8 @@ export default function AdminUserLeaderboardPage() {
                 <Input
                   type="date"
                   value={range.until}
+                  onClick={(event) => event.currentTarget.showPicker?.()}
+                  onFocus={(event) => event.currentTarget.showPicker?.()}
                   onChange={(event) => setRange((prev) => ({ ...prev, until: event.target.value }))}
                   className="h-9 w-36 bg-white dark:bg-[#0B2A50]"
                 />
@@ -1097,10 +1131,11 @@ export default function AdminUserLeaderboardPage() {
                 </div>
                 <InsightStrip overview={overview} />
 
-                <SpotlightCarousel
+                <GroupComparison
                   users={rankedUsers}
-                  tab={tab}
-                  onSelect={(user) => setSelectedUserId(user.user_id)}
+                  rulesText={groupRules}
+                  onRulesChange={setGroupRules}
+                  onSelectUser={(user) => setSelectedUserId(user.user_id)}
                 />
 
                 <section className="rounded-lg border border-[#DADCE0] bg-white p-4 shadow-sm dark:border-[#213D5E] dark:bg-[#06213F]">

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

@@ -13,14 +13,17 @@ methods' ``user_id`` parameter is designed for.
 
 from __future__ import annotations
 
+import json
 import logging
 import re
+from difflib import SequenceMatcher
 
 from datetime import datetime, timedelta
 
 from fastapi import APIRouter, HTTPException, Query, Request
 from pydantic import BaseModel, Field
 from sqlalchemy import and_, case, desc, func, or_, select
+from langchain_core.messages import HumanMessage, SystemMessage
 
 from app.gateway.deps import (
     get_agent_store,
@@ -31,6 +34,7 @@ from app.gateway.deps import (
 from deerflow.agents.memory import BuiltinFileProvider
 from deerflow.config.paths import get_paths
 from deerflow.config.system_settings import load_system_settings
+from deerflow.models import create_chat_model
 from deerflow.runtime import serialize_channel_values
 from app.gateway.routers.memory import _build_v1_provider, _is_v1
 from deerflow.persistence.engine import get_session_factory
@@ -158,6 +162,11 @@ class AdminUserAnalyticsResponse(BaseModel):
     trends: list[AdminLeaderboardTrendPoint] = Field(default_factory=list)
 
 
+class AdminLeaderboardReportResponse(BaseModel):
+    report: str
+    generated_at: str
+
+
 def _now() -> datetime:
     return datetime.now()
 
@@ -215,6 +224,24 @@ def _is_displayable_question(value: str | None) -> bool:
     return lowered not in {"uploaded_files", "attachments", "files"}
 
 
+def _question_similarity_key(value: str) -> str:
+    return re.sub(r"[\W_]+", "", value.lower())
+
+
+def _message_content_to_text(content) -> str:
+    if isinstance(content, str):
+        return content
+    if isinstance(content, list):
+        parts: list[str] = []
+        for item in content:
+            if isinstance(item, dict):
+                parts.append(str(item.get("text") or item.get("content") or ""))
+            else:
+                parts.append(str(item))
+        return "\n".join(part for part in parts if part.strip())
+    return str(content or "")
+
+
 def _run_time_filter(since: datetime, until: datetime):
     return and_(RunRow.created_at >= since, RunRow.created_at <= until)
 
@@ -640,17 +667,14 @@ async def _query_frequent_questions(
     stmt = (
         select(
             RunRow.first_human_message,
-            func.count(RunRow.run_id).label("count"),
-            func.max(RunRow.user_id).label("user_id"),
-            func.max(UserRow.email).label("email"),
-            func.max(RunRow.created_at).label("asked_at"),
+            RunRow.user_id,
+            UserRow.email,
+            RunRow.created_at,
         )
         .outerjoin(UserRow, UserRow.id == RunRow.user_id)
         .where(_run_time_filter(since, until), RunRow.first_human_message.is_not(None), RunRow.first_human_message != "")
-        .group_by(RunRow.first_human_message)
-        .having(func.count(RunRow.run_id) > 1)
-        .order_by(desc("count"), desc("asked_at"))
-        .limit(limit)
+        .order_by(RunRow.created_at.desc())
+        .limit(min(max(limit * 20, 200), 1000))
     )
     stmt = _apply_run_scope(
         stmt,
@@ -662,17 +686,39 @@ async def _query_frequent_questions(
         include_scheduled=include_scheduled,
     )
     rows = (await session.execute(stmt)).all()
-    questions: list[AdminLeaderboardQuestion] = []
+    groups: list[dict] = []
     for r in rows:
         text = _clean_question_text(r[0]) if cleanup_system_questions else str(r[0] or "").strip()
         if cleanup_system_questions and not _is_displayable_question(text):
             continue
+        key = _question_similarity_key(text)
+        if not key:
+            continue
+        target = None
+        for group in groups:
+            score = SequenceMatcher(None, key, group["key"]).ratio()
+            if score >= 0.72 or key in group["key"] or group["key"] in key:
+                target = group
+                break
+        if target is None:
+            groups.append({"key": key, "text": text, "count": 1, "user_id": r[1] or "", "email": r[2] or "", "asked_at": r[3]})
+        else:
+            target["count"] += 1
+            if r[3] and (target.get("asked_at") is None or r[3] > target["asked_at"]):
+                target.update({"text": text, "user_id": r[1] or "", "email": r[2] or "", "asked_at": r[3]})
+
+    groups.sort(key=lambda item: (item["count"], _iso(item.get("asked_at"))), reverse=True)
+    questions: list[AdminLeaderboardQuestion] = []
+    for group in groups[:limit]:
+        text = group["text"][:460]
+        if group["count"] > 1:
+            text = f"{text}（相似问题 {group['count']} 次）"
         questions.append(
             AdminLeaderboardQuestion(
-                text=text[:500],
-                user_id=r[2] or "",
-                email=r[3] or "",
-                asked_at=_iso(r[4]),
+                text=text,
+                user_id=group["user_id"],
+                email=group["email"],
+                asked_at=_iso(group.get("asked_at")),
             )
         )
     return questions
@@ -866,6 +912,93 @@ async def get_user_leaderboard(
     )
 
 
+@router.post("/leaderboard/report", response_model=AdminLeaderboardReportResponse)
+async def generate_user_leaderboard_report(
+    request: Request,
+    days: int = Query(default=30, ge=1, le=365),
+    since: str | None = Query(default=None, description="Inclusive range start, ISO datetime"),
+    until: str | None = Query(default=None, description="Inclusive range end, ISO datetime"),
+    limit: int = Query(default=30, ge=10, le=100),
+) -> AdminLeaderboardReportResponse:
+    """Generate an LLM-written admin report for the current leaderboard window."""
+    await _require_admin(request)
+    session_factory = get_session_factory()
+    if session_factory is None:
+        raise HTTPException(status_code=503, detail="Analytics requires database persistence")
+
+    settings = load_system_settings().leaderboard
+    since_dt, until_dt, _range_days = _resolve_range(days, since, until)
+    excluded = {uid for uid in settings.exclude_user_ids if uid}
+    common = {
+        "exclude_user_ids": excluded,
+        "include_scheduled": settings.include_scheduled,
+        "include_admins": settings.include_admins,
+        "include_failed": settings.include_failed,
+    }
+    tool_common = {
+        "exclude_user_ids": excluded,
+        "include_scheduled": settings.include_scheduled,
+        "include_admins": settings.include_admins,
+    }
+    question_common = {
+        **common,
+        "cleanup_system_questions": settings.cleanup_system_questions,
+    }
+
+    async with session_factory() as session:
+        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)
+        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)
+
+    top_users = sorted(users, key=lambda u: (u.run_count + u.tool_call_count, u.total_tokens), reverse=True)[:12]
+    context = {
+        "range": {"since": _iso(since_dt), "until": _iso(until_dt)},
+        "overview": overview.model_dump(),
+        "top_users": [u.model_dump() for u in top_users],
+        "top_skills": [s.model_dump() for s in skills[:12]],
+        "top_tools": [t.model_dump() for t in tools[:12]],
+        "top_models": [m.model_dump() for m in models[:12]],
+        "frequent_questions": [q.model_dump() for q in frequent_questions[:20]],
+        "recent_questions": [q.model_dump() for q in recent_questions[:30]],
+        "trends": [t.model_dump() for t in trends[-14:]],
+    }
+    prompt = (
+        "请基于以下管理员排行榜统计数据，生成一份中文运营分析报告。"
+        "报告需要有结论，不要只罗列数字。必须分析："
+        "1) 谁使用次数最多、问答最多、Token 消耗最高；"
+        "2) 用户通常在问什么、相似问题聚类反映了哪些关注方向；"
+        "3) 当前所有用户关注的事件/主题/业务方向；"
+        "4) 从问题重复、失败率、追问密度等信号推断用户是否满意系统回答，注明这是推断；"
+        "5) 哪些技能/工具/模型最常用，可能说明什么；"
+        "6) 给管理员 3-5 条可执行建议。"
+        "输出结构：摘要、关键发现、用户与分组观察、问题主题、满意度推断、建议。"
+        "\n\n统计数据如下：\n"
+        f"{json.dumps(context, ensure_ascii=False, default=str)}"
+    )
+    try:
+        model = create_chat_model(name=None, thinking_enabled=False)
+        response = await model.ainvoke(
+            [
+                SystemMessage(content="你是企业 AI 系统的运营分析师，擅长从用户行为、问题文本和调用指标中生成管理报告。"),
+                HumanMessage(content=prompt),
+            ],
+            config={"run_name": "admin_user_leaderboard_report"},
+        )
+    except Exception as exc:
+        logger.exception("Failed to generate leaderboard report")
+        raise HTTPException(status_code=503, detail=f"Report generation failed: {exc}") from exc
+
+    return AdminLeaderboardReportResponse(
+        report=_message_content_to_text(getattr(response, "content", response)).strip(),
+        generated_at=_iso(_now()),
+    )
+
+
 @router.get("/{user_id}/analytics", response_model=AdminUserAnalyticsResponse)
 async def get_user_analytics(
     user_id: str,