diff --git a/frontend-web/src/components/html-preview-frame.tsx b/frontend-web/src/components/html-preview-frame.tsx
new file mode 100644
index 00000000..2030e398
--- /dev/null
+++ b/frontend-web/src/components/html-preview-frame.tsx
@@ -0,0 +1,45 @@
+import { useEffect, useState } from "react";
+
+import { injectInPageAnchorHandler } from "@/core/utils/markdown";
+
+/**
+ * Sandboxed preview of a generated HTML document.
+ *
+ * Renders via a `blob:` URL rather than `srcDoc`. A srcDoc document's base URL
+ * is `about:srcdoc`, so clicking an in-page anchor (`<a href="#section">`)
+ * navigates the frame to `about:blank#section` and BLANKS it. A `blob:` URL is
+ * a real document URL, so fragment links scroll within the frame as expected —
+ * all without enabling scripts (the sandbox stays script-free for security; the
+ * server already sanitizes script vectors and this is defense-in-depth).
+ *
+ * The `charset=utf-8` on the blob type is required: a blob: URL whose
+ * Content-Type omits the charset is decoded with the OS default (GBK/Latin-1 on
+ * Chinese Windows), garbling CJK text when the HTML lacks a `<meta charset>`.
+ */
+export function HtmlPreviewFrame({
+  html,
+  className = "h-[70vh] w-full rounded-md border bg-white",
+}: {
+  html: string;
+  className?: string;
+}) {
+  const [url, setUrl] = useState<string>();
+
+  useEffect(() => {
+    const blob = new Blob([injectInPageAnchorHandler(html ?? "")], {
+      type: "text/html;charset=utf-8",
+    });
+    const objectUrl = URL.createObjectURL(blob);
+    setUrl(objectUrl);
+    return () => URL.revokeObjectURL(objectUrl);
+  }, [html]);
+
+  return (
+    <iframe
+      title="HTML 预览"
+      sandbox="allow-scripts allow-forms"
+      src={url}
+      className={className}
+    />
+  );
+}
diff --git a/frontend-web/src/components/workspace/artifacts/artifact-file-detail.tsx b/frontend-web/src/components/workspace/artifacts/artifact-file-detail.tsx
index ef9416f2..0628cf72 100644
--- a/frontend-web/src/components/workspace/artifacts/artifact-file-detail.tsx
+++ b/frontend-web/src/components/workspace/artifacts/artifact-file-detail.tsx
@@ -1,7 +1,7 @@
 "use client";
 
-import {
-  ArrowDownIcon,
+import {
+  ArrowDownIcon,
   Code2Icon,
   CopyIcon,
   DownloadIcon,
@@ -12,11 +12,11 @@ import {
   SaveIcon,
   SquareArrowOutUpRightIcon,
   XIcon,
-} from "lucide-react";
-import { useCallback, useEffect, useMemo, useRef, useState } from "react";
-import type { AnchorHTMLAttributes, HTMLAttributes, ReactNode } from "react";
-import { toast } from "sonner";
-import { Streamdown } from "streamdown";
+} from "lucide-react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import type { AnchorHTMLAttributes, HTMLAttributes, ReactNode } from "react";
+import { toast } from "sonner";
+import { Streamdown } from "streamdown";
 
 import {
   Artifact,
@@ -48,10 +48,15 @@ import { urlOfArtifact } from "@/core/artifacts/utils";
 import { useI18n } from "@/core/i18n/hooks";
 import { downloadMarkdownAsDocx } from "@/core/scheduled-tasks/markdown-docx";
 import { installSkill } from "@/core/skills/api";
-import { streamdownPlugins } from "@/core/streamdown";
-import { checkCodeFile, getFileName } from "@/core/utils/files";
-import { createMarkdownAnchorResolver } from "@/core/utils/markdown";
-import { env } from "@/env";
+import { streamdownPlugins } from "@/core/streamdown";
+import { checkCodeFile, getFileName } from "@/core/utils/files";
+import {
+  createMarkdownAnchorResolver,
+  injectInPageAnchorHandler,
+  isInPageAnchor,
+  scrollToInPageAnchor,
+} from "@/core/utils/markdown";
+import { env } from "@/env";
 import { desensitize } from "@/lib/desensitize";
 import { cn } from "@/lib/utils";
 
@@ -61,15 +66,15 @@ import { Tooltip } from "../tooltip";
 
 import { useArtifacts } from "./context";
 
-const SANDBOX_RESUME_EVENT = "workspace:sandbox-resume-autoscroll";
-
-function extractTextFromChildren(children: ReactNode): string {
-  if (typeof children === "string" || typeof children === "number") return String(children);
-  if (Array.isArray(children)) return children.map(extractTextFromChildren).join("");
-  return "";
-}
-
-function findScrollableArtifactElement(root: HTMLElement | null) {
+const SANDBOX_RESUME_EVENT = "workspace:sandbox-resume-autoscroll";
+
+function extractTextFromChildren(children: ReactNode): string {
+  if (typeof children === "string" || typeof children === "number") return String(children);
+  if (Array.isArray(children)) return children.map(extractTextFromChildren).join("");
+  return "";
+}
+
+function findScrollableArtifactElement(root: HTMLElement | null) {
   if (!root) {
     return null;
   }
@@ -714,54 +719,68 @@ export function ArtifactFilePreview({
   language: string;
   animated?: boolean;
   activeCursor?: boolean;
-}) {
-  const [htmlPreviewUrl, setHtmlPreviewUrl] = useState<string>();
-  const markdownComponents = useMemo(() => {
-    const anchorResolver = createMarkdownAnchorResolver(content ?? "");
-    const heading = (level: 1 | 2 | 3 | 4 | 5 | 6) => {
-      const Tag = `h${level}` as const;
-      return ({ children, id, ...props }: HTMLAttributes<HTMLHeadingElement>) => (
-        <Tag id={id ?? anchorResolver.getHeadingId(level, extractTextFromChildren(children))} {...props}>
-          {children}
-        </Tag>
-      );
-    };
-
-    return {
-      h1: heading(1),
-      h2: heading(2),
-      h3: heading(3),
-      h4: heading(4),
-      h5: heading(5),
-      h6: heading(6),
-      a: (props: AnchorHTMLAttributes<HTMLAnchorElement>) => {
-        if (typeof props.children === "string" && /^citation:(.+)$/.test(props.children)) {
-          return <ArtifactLink {...props} />;
-        }
-        const { className, ...rest } = props;
-        const resolvedHref = anchorResolver.resolveHref(
-          props.href,
-          extractTextFromChildren(props.children),
-        );
-        if (resolvedHref === null) {
-          return (
-            <span
-              className={cn(
-                "text-primary/80 decoration-dotted underline underline-offset-2 cursor-not-allowed",
-                className,
-              )}
-              title="未在当前 Markdown 中找到对应章节"
-            >
-              {props.children}
-            </span>
-          );
-        }
-        return <ArtifactLink {...rest} className={className} href={resolvedHref ?? props.href} />;
-      },
-    };
-  }, [content]);
-
-  useEffect(() => {
+}) {
+  const [htmlPreviewUrl, setHtmlPreviewUrl] = useState<string>();
+  const markdownComponents = useMemo(() => {
+    const anchorResolver = createMarkdownAnchorResolver(content ?? "");
+    const heading = (level: 1 | 2 | 3 | 4 | 5 | 6) => {
+      const Tag = `h${level}` as const;
+      return ({ children, id, ...props }: HTMLAttributes<HTMLHeadingElement>) => (
+        <Tag id={id ?? anchorResolver.getHeadingId(level, extractTextFromChildren(children))} {...props}>
+          {children}
+        </Tag>
+      );
+    };
+
+    return {
+      h1: heading(1),
+      h2: heading(2),
+      h3: heading(3),
+      h4: heading(4),
+      h5: heading(5),
+      h6: heading(6),
+      a: (props: AnchorHTMLAttributes<HTMLAnchorElement>) => {
+        if (typeof props.children === "string" && /^citation:(.+)$/.test(props.children)) {
+          return <ArtifactLink {...props} />;
+        }
+        const { className, ...rest } = props;
+        const resolvedHref = anchorResolver.resolveHref(
+          props.href,
+          extractTextFromChildren(props.children),
+        );
+        if (resolvedHref === null) {
+          return (
+            <span
+              className={cn(
+                "text-primary/80 decoration-dotted underline underline-offset-2 cursor-not-allowed",
+                className,
+              )}
+              title="未在当前 Markdown 中找到对应章节"
+            >
+              {props.children}
+            </span>
+          );
+        }
+        const finalHref = resolvedHref ?? props.href;
+        return (
+          <ArtifactLink
+            {...rest}
+            className={className}
+            href={finalHref}
+            onClick={(event) => {
+              if (isInPageAnchor(finalHref)) {
+                event.preventDefault();
+                scrollToInPageAnchor(event.currentTarget, finalHref);
+              }
+              rest.onClick?.(event);
+            }}
+          />
+        );
+      },
+    };
+  }, [content]);
+
+  useEffect(() => {
     if (language !== "html") {
       setHtmlPreviewUrl(undefined);
       return;
@@ -770,7 +789,11 @@ export function ArtifactFilePreview({
     // 必须带 charset=utf-8：blob: URL 的 Content-Type 不含 charset 时，iframe 会按
     // 系统默认编码(中文 Windows 常为 GBK/Latin-1)解码,模型生成的 HTML 若没写
     // <meta charset> 就会中文乱码。与下方下载/新窗口打开的 blobType 保持一致。
-    const blob = new Blob([content ?? ""], { type: "text/html;charset=utf-8" });
+    // Intercept in-page anchor clicks so they scroll within the iframe instead
+    // of navigating the sandboxed blob: document (which blanks the frame).
+    const blob = new Blob([injectInPageAnchorHandler(content ?? "")], {
+      type: "text/html;charset=utf-8",
+    });
     const url = URL.createObjectURL(blob);
     setHtmlPreviewUrl(url);
 
@@ -783,16 +806,17 @@ export function ArtifactFilePreview({
     return (
       <div
         data-artifact-preview-scroll
+        data-markdown-anchor-root
         className={cn(
           "size-full overflow-auto px-5 py-4",
           animated && "animate-[sandbox-preview-enter_320ms_ease-out]",
         )}
       >
-        <Streamdown
-          className="size-full"
-          {...streamdownPlugins}
-          components={markdownComponents}
-        >
+        <Streamdown
+          className="size-full"
+          {...streamdownPlugins}
+          components={markdownComponents}
+        >
           {content ?? ""}
         </Streamdown>
         {activeCursor && (
diff --git a/frontend-web/src/components/workspace/messages/markdown-content.tsx b/frontend-web/src/components/workspace/messages/markdown-content.tsx
index 7e32483a..e7b6380e 100644
--- a/frontend-web/src/components/workspace/messages/markdown-content.tsx
+++ b/frontend-web/src/components/workspace/messages/markdown-content.tsx
@@ -1,18 +1,22 @@
-"use client";
-
+"use client";
+
 import { useMemo } from "react";
 import type { AnchorHTMLAttributes, HTMLAttributes, ReactNode } from "react";
-
-import {
-  MessageResponse,
-  type MessageResponseProps,
-} from "@/components/ai-elements/message";
+
+import {
+  MessageResponse,
+  type MessageResponseProps,
+} from "@/components/ai-elements/message";
 import { streamdownPlugins } from "@/core/streamdown";
-import { createMarkdownAnchorResolver } from "@/core/utils/markdown";
+import {
+  createMarkdownAnchorResolver,
+  isInPageAnchor,
+  scrollToInPageAnchor,
+} from "@/core/utils/markdown";
 import { cn } from "@/lib/utils";
-
-import { CitationLink } from "../citations/citation-link";
-
+
+import { CitationLink } from "../citations/citation-link";
+
 function isExternalUrl(href: string | undefined): boolean {
   return !!href && /^https?:\/\//.test(href);
 }
@@ -22,23 +26,23 @@ function extractTextFromChildren(children: ReactNode): string {
   if (Array.isArray(children)) return children.map(extractTextFromChildren).join("");
   return "";
 }
-
-export type MarkdownContentProps = {
-  content: string;
-  isLoading: boolean;
-  rehypePlugins: MessageResponseProps["rehypePlugins"];
-  className?: string;
-  remarkPlugins?: MessageResponseProps["remarkPlugins"];
-  components?: MessageResponseProps["components"];
-};
-
-/** Renders markdown content. */
-export function MarkdownContent({
-  content,
-  rehypePlugins,
-  className,
-  remarkPlugins = streamdownPlugins.remarkPlugins,
-  components: componentsFromProps,
+
+export type MarkdownContentProps = {
+  content: string;
+  isLoading: boolean;
+  rehypePlugins: MessageResponseProps["rehypePlugins"];
+  className?: string;
+  remarkPlugins?: MessageResponseProps["remarkPlugins"];
+  components?: MessageResponseProps["components"];
+};
+
+/** Renders markdown content. */
+export function MarkdownContent({
+  content,
+  rehypePlugins,
+  className,
+  remarkPlugins = streamdownPlugins.remarkPlugins,
+  components: componentsFromProps,
 }: MarkdownContentProps) {
   const anchorResolver = useMemo(() => createMarkdownAnchorResolver(content), [content]);
   const components = useMemo(() => {
@@ -61,14 +65,14 @@ export function MarkdownContent({
       a: (props: AnchorHTMLAttributes<HTMLAnchorElement>) => {
         if (props.href?.startsWith("#reference-")) {
           return <CitationLink {...props} />;
-        }
-        if (typeof props.children === "string") {
-          const match = /^citation:(.+)$/.exec(props.children);
-          if (match) {
-            const [, text] = match;
-            return <CitationLink {...props}>{text}</CitationLink>;
-          }
-        }
+        }
+        if (typeof props.children === "string") {
+          const match = /^citation:(.+)$/.exec(props.children);
+          if (match) {
+            const [, text] = match;
+            return <CitationLink {...props}>{text}</CitationLink>;
+          }
+        }
         const { className, target, rel, ...rest } = props;
         const external = isExternalUrl(props.href);
         const resolvedHref = anchorResolver.resolveHref(
@@ -88,33 +92,45 @@ export function MarkdownContent({
             </span>
           );
         }
+        const finalHref = resolvedHref ?? props.href;
         return (
           <a
             {...rest}
-            href={resolvedHref ?? props.href}
+            href={finalHref}
             className={cn(
               "text-primary decoration-primary/30 hover:decoration-primary/60 underline underline-offset-2 transition-colors",
               className,
-            )}
-            target={target ?? (external ? "_blank" : undefined)}
-            rel={rel ?? (external ? "noopener noreferrer" : undefined)}
-          />
-        );
+            )}
+            target={target ?? (external ? "_blank" : undefined)}
+            rel={rel ?? (external ? "noopener noreferrer" : undefined)}
+            onClick={(event) => {
+              // HashRouter would turn a `#section` click into a route change → 404.
+              // Scroll to the heading ourselves instead.
+              if (isInPageAnchor(finalHref)) {
+                event.preventDefault();
+                scrollToInPageAnchor(event.currentTarget, finalHref);
+              }
+              rest.onClick?.(event);
+            }}
+          />
+        );
       },
       ...componentsFromProps,
     };
   }, [anchorResolver, componentsFromProps]);
-
-  if (!content) return null;
-
-  return (
-    <MessageResponse
-      className={className}
-      remarkPlugins={remarkPlugins}
-      rehypePlugins={rehypePlugins}
-      components={components}
-    >
-      {content}
-    </MessageResponse>
-  );
-}
+
+  if (!content) return null;
+
+  return (
+    <div data-markdown-anchor-root className="contents">
+      <MessageResponse
+        className={className}
+        remarkPlugins={remarkPlugins}
+        rehypePlugins={rehypePlugins}
+        components={components}
+      >
+        {content}
+      </MessageResponse>
+    </div>
+  );
+}
diff --git a/frontend-web/src/core/admin/api.ts b/frontend-web/src/core/admin/api.ts
index 725a02b9..d56004d9 100644
--- a/frontend-web/src/core/admin/api.ts
+++ b/frontend-web/src/core/admin/api.ts
@@ -136,8 +136,18 @@ export interface AdminUserAnalyticsResponse {
 export interface AdminLeaderboardReportResponse {
   report: string;
   generated_at: string;
+  cached?: boolean;
+  model_name?: string | null;
 }
 
+export type AdminLeaderboardReportStreamEvent =
+  | { event: "meta"; data: { cached?: boolean; model_name?: string | null } }
+  | { event: "cached"; data: { report: string; generated_at?: string | null; model_name?: string | null } }
+  | { event: "thinking"; data: { chunk: string } }
+  | { event: "text"; data: { chunk: string } }
+  | { event: "done"; data: { cached?: boolean; generated_at?: string | null; model_name?: string | null; report?: string } }
+  | { event: "error"; data: { message: string } };
+
 const base = () => `${getBackendBaseURL()}/api/admin/users`;
 
 async function parse<T>(res: Response, what: string): Promise<T> {
@@ -216,6 +226,7 @@ export async function getUserAnalytics(
 export async function generateUserLeaderboardReport(
   range: { since: string; until: string; days?: number },
   limit = 30,
+  modelName?: string,
 ): Promise<AdminLeaderboardReportResponse> {
   const params = new URLSearchParams({
     days: String(range.days ?? 30),
@@ -223,6 +234,7 @@ export async function generateUserLeaderboardReport(
     until: range.until,
     limit: String(limit),
   });
+  if (modelName) params.set("model_name", modelName);
   return parse(
     await apiFetch(`${base()}/leaderboard/report?${params}`, {
       method: "POST",
@@ -231,6 +243,76 @@ export async function generateUserLeaderboardReport(
   );
 }
 
+function parseSseFrame(frame: string): AdminLeaderboardReportStreamEvent | null {
+  let event = "message";
+  const dataLines: string[] = [];
+  for (const rawLine of frame.split(/\r?\n/)) {
+    const line = rawLine.trimEnd();
+    if (!line || line.startsWith(":")) continue;
+    if (line.startsWith("event:")) {
+      event = line.slice("event:".length).trim();
+    } else if (line.startsWith("data:")) {
+      dataLines.push(line.slice("data:".length).trimStart());
+    }
+  }
+  if (!dataLines.length) return null;
+  const data = JSON.parse(dataLines.join("\n")) as AdminLeaderboardReportStreamEvent["data"];
+  return { event, data } as AdminLeaderboardReportStreamEvent;
+}
+
+export async function streamUserLeaderboardReport({
+  range,
+  limit = 30,
+  modelName,
+  signal,
+  onEvent,
+}: {
+  range: { since: string; until: string; days?: number };
+  limit?: number;
+  modelName?: string;
+  signal?: AbortSignal;
+  onEvent: (event: AdminLeaderboardReportStreamEvent) => void;
+}) {
+  const params = new URLSearchParams({
+    days: String(range.days ?? 30),
+    since: range.since,
+    until: range.until,
+    limit: String(limit),
+  });
+  if (modelName) params.set("model_name", modelName);
+  const response = await apiFetch(`${base()}/leaderboard/report/stream?${params}`, {
+    method: "POST",
+    signal,
+  });
+  if (!response.ok) {
+    const err = (await response.json().catch(() => ({}))) as { detail?: string };
+    throw new Error(err.detail ?? `Failed to stream leaderboard report (HTTP ${response.status})`);
+  }
+  if (!response.body) {
+    throw new Error("当前浏览器不支持流式报告读取");
+  }
+
+  const reader = response.body.getReader();
+  const decoder = new TextDecoder("utf-8");
+  let buffer = "";
+  for (;;) {
+    const { done, value } = await reader.read();
+    buffer += decoder.decode(value ?? new Uint8Array(), { stream: !done });
+    const frames = buffer.split(/\r?\n\r?\n/);
+    buffer = frames.pop() ?? "";
+    for (const frame of frames) {
+      const parsed = parseSseFrame(frame);
+      if (parsed) onEvent(parsed);
+    }
+    if (done) break;
+  }
+  const tail = buffer.trim();
+  if (tail) {
+    const parsed = parseSseFrame(tail);
+    if (parsed) onEvent(parsed);
+  }
+}
+
 export async function addAdminMemoryEntry(
   userId: string,
   content: string,
diff --git a/frontend-web/src/core/admin/hooks.ts b/frontend-web/src/core/admin/hooks.ts
index f08aec27..9d19457b 100644
--- a/frontend-web/src/core/admin/hooks.ts
+++ b/frontend-web/src/core/admin/hooks.ts
@@ -53,10 +53,12 @@ export function useGenerateUserLeaderboardReport() {
     mutationFn: ({
       range,
       limit,
+      modelName,
     }: {
       range: { since: string; until: string; days?: number };
       limit?: number;
-    }) => generateUserLeaderboardReport(range, limit ?? 30),
+      modelName?: string;
+    }) => generateUserLeaderboardReport(range, limit ?? 30, modelName),
   });
 }
 
diff --git a/frontend-web/src/core/utils/markdown.ts b/frontend-web/src/core/utils/markdown.ts
index d6dca9a9..96060708 100644
--- a/frontend-web/src/core/utils/markdown.ts
+++ b/frontend-web/src/core/utils/markdown.ts
@@ -3,8 +3,8 @@ export function extractTitleFromMarkdown(markdown: string) {
     let title = markdown.split("\n")[0]!.trim();
     if (title.startsWith("# ")) {
       title = title.slice(2).trim();
-    }
-    return title;
+    }
+    return title;
   }
   return undefined;
 }
@@ -52,6 +52,36 @@ function decodeLinkPart(value: string): string {
   }
 }
 
+/** True for hrefs that point to an anchor within the current document (`#section`). */
+export function isInPageAnchor(href: string | undefined | null): href is string {
+  return !!href && href.startsWith("#") && !href.startsWith("#reference-");
+}
+
+function escapeAttrValue(value: string): string {
+  return value.replace(/\\/g, "\\\\").replace(/"/g, '\\"');
+}
+
+/**
+ * Scrolls to an in-page anchor by id without mutating `window.location.hash`.
+ *
+ * The app runs under a HashRouter, so letting an `<a href="#...">` click change
+ * the hash would be interpreted as a route change and 404. We resolve the target
+ * element ourselves and scroll to it instead. Scoped to the nearest
+ * `[data-markdown-anchor-root]` so headings in other messages don't collide.
+ */
+export function scrollToInPageAnchor(anchor: HTMLElement, href: string | undefined | null): void {
+  if (!isInPageAnchor(href)) return;
+  const id = decodeLinkPart(href.slice(1)).trim();
+  if (!id) return;
+  const scope = anchor.closest<HTMLElement>("[data-markdown-anchor-root]");
+  const selector = `[id="${escapeAttrValue(id)}"]`;
+  const target =
+    (scope?.querySelector<HTMLElement>(selector) ?? null) ??
+    document.getElementById(id) ??
+    document.querySelector<HTMLElement>(selector);
+  target?.scrollIntoView({ behavior: "smooth", block: "start" });
+}
+
 function normalizeLookupKey(value: string): string {
   return markdownSlug(decodeLinkPart(value).replace(/^#+/, ""));
 }
@@ -68,6 +98,45 @@ function candidateTextFromHref(href: string): string {
   return decodeLinkPart(lastSegment).replace(/\.(md|markdown)$/i, "");
 }
 
+/**
+ * Injects a small runtime script into generated HTML so that clicking an
+ * in-page anchor (`<a href="#section">`) scrolls within the iframe instead of
+ * navigating it. The preview iframe loads from a sandboxed `blob:` URL, where a
+ * fragment navigation blanks the frame; intercepting the click avoids that.
+ */
+export function injectInPageAnchorHandler(html: string): string {
+  const script = `<script>(function(){
+  function decode(v){try{return decodeURIComponent(v);}catch(e){return v;}}
+  function bySelector(id){
+    if(!document.querySelector)return null;
+    var esc=window.CSS&&CSS.escape?CSS.escape(id):id.replace(/["\\\\]/g,"\\\\$&");
+    try{return document.querySelector("#"+esc+",[name=\\""+esc+"\\"]");}catch(e){return null;}
+  }
+  document.addEventListener("click",function(e){
+    var el=e.target;
+    while(el&&el.tagName!=="A"){el=el.parentElement;}
+    if(!el)return;
+    var href=el.getAttribute("href");
+    if(!href||href.charAt(0)!=="#"||href.length<2)return;
+    e.preventDefault();
+    var id=decode(href.slice(1));
+    var raw=href.slice(1);
+    var target=
+      document.getElementById(id)||
+      document.getElementById(raw)||
+      document.getElementsByName(id)[0]||
+      document.getElementsByName(raw)[0]||
+      bySelector(id)||
+      bySelector(raw);
+    if(target){target.scrollIntoView({behavior:"smooth",block:"start"});}
+  },true);
+})();</script>`;
+  if (/<\/body>/i.test(html)) {
+    return html.replace(/<\/body>/i, `${script}</body>`);
+  }
+  return html + script;
+}
+
 export function createMarkdownAnchorResolver(markdown: string): MarkdownAnchorResolver {
   const headings: MarkdownHeadingAnchor[] = [];
   const idsByLookup = new Map<string, string>();
diff --git a/frontend-web/src/pages/AdminUserLeaderboardPage.tsx b/frontend-web/src/pages/AdminUserLeaderboardPage.tsx
index ed15d687..08545894 100644
--- a/frontend-web/src/pages/AdminUserLeaderboardPage.tsx
+++ b/frontend-web/src/pages/AdminUserLeaderboardPage.tsx
@@ -25,7 +25,7 @@ import {
   Users,
   type LucideIcon,
 } from "lucide-react";
-import { useEffect, useId, useMemo, useState } from "react";
+import { useEffect, useId, useMemo, useRef, useState } from "react";
 import { useNavigate } from "react-router-dom";
 
 import { Badge } from "@/components/ui/badge";
@@ -40,6 +40,7 @@ import {
 } from "@/components/ui/dialog";
 import { Input } from "@/components/ui/input";
 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";
 import type {
   AdminLeaderboardDimension,
@@ -49,19 +50,22 @@ import type {
   AdminLeaderboardTrendPoint,
   AdminLeaderboardUser,
 } from "@/core/admin/api";
-import { useGenerateUserLeaderboardReport, useUserAnalytics, useUserLeaderboard } from "@/core/admin/hooks";
+import { streamUserLeaderboardReport } from "@/core/admin/api";
+import { useUserAnalytics, useUserLeaderboard } from "@/core/admin/hooks";
+import { useModels } from "@/core/models/hooks";
 import { cn } from "@/lib/utils";
 
 type UserRankTab = "activity" | "questions" | "tokens" | "skills" | "efficiency";
 type RangeState = { since: string; until: string; days?: number };
-type LeaderboardAccent = "indigo" | "rose" | "amber" | "teal";
+type LeaderboardAccent = "crimson" | "rose" | "amber" | "teal";
+const DEFAULT_REPORT_MODEL = "__default__";
 
 const accentClasses: Record<LeaderboardAccent, { soft: string; text: string; bar: string; border: string }> = {
-  indigo: {
-    soft: "bg-[#EEF2FF] dark:bg-indigo-400/15",
-    text: "text-[#4F46E5] dark:text-indigo-200",
-    bar: "bg-[#4F46E5]",
-    border: "border-[#C7D2FE] dark:border-indigo-300/25",
+  crimson: {
+    soft: "bg-[#FFF1F1] dark:bg-[#C1121F]/15",
+    text: "text-[#C1121F] dark:text-[#F2B8BB]",
+    bar: "bg-[#C1121F]",
+    border: "border-[#F1D6D6] dark:border-[#462123]",
   },
   rose: {
     soft: "bg-[#FFF1F2] dark:bg-rose-400/15",
@@ -83,7 +87,7 @@ const accentClasses: Record<LeaderboardAccent, { soft: string; text: string; bar
   },
 };
 
-const RANK_COLORS = ["#4F46E5", "#0F766E", "#F59E0B", "#E11D48", "#7C3AED"] as const;
+const RANK_COLORS = ["#C1121F", "#E11D48", "#F59E0B", "#991B1B", "#B45309"] as const;
 
 function toDateInput(date: Date): string {
   const year = date.getFullYear();
@@ -241,7 +245,7 @@ function StatCard({
 }) {
   const color = accentClasses[accent];
   return (
-    <div className={cn("rounded-lg border bg-white p-4 shadow-sm dark:bg-[#06213F]", color.border)}>
+    <div className={cn("rounded-lg border bg-white p-4 shadow-sm dark:bg-[#230D0F]", color.border)}>
       <div className="flex items-center justify-between gap-3">
         <span className="text-sm text-[#5F6368] dark:text-slate-300">{label}</span>
         <span className={cn("flex size-8 items-center justify-center rounded-md", color.soft, color.text)}>
@@ -260,21 +264,47 @@ function InsightStrip({ overview }: { overview: AdminLeaderboardOverview }) {
   const activeUsers = Math.max(1, overview.active_users);
   const totalRuns = Math.max(1, overview.total_runs);
   const items = [
-    ["人均使用", overview.total_runs / activeUsers, "次/活跃用户"],
-    ["问答密度", overview.total_questions / totalRuns, "问答/运行"],
-    ["平均 Token", overview.total_tokens / totalRuns, "Token/运行"],
-    ["技能覆盖", overview.total_tool_calls ? (overview.total_skill_calls / overview.total_tool_calls) * 100 : 0, "%"],
-    ["失败率", (overview.error_runs / totalRuns) * 100, "%"],
+    {
+      label: "人均使用",
+      value: overview.total_runs / activeUsers,
+      unit: "次/活跃用户",
+      description: "当前时间段内，平均每位活跃用户发起了多少次运行。",
+    },
+    {
+      label: "问答密度",
+      value: overview.total_questions / totalRuns,
+      unit: "问答/运行",
+      description: "问答次数 ÷ 运行次数，用来判断每次使用承载了多少有效提问。",
+    },
+    {
+      label: "平均 Token",
+      value: overview.total_tokens / totalRuns,
+      unit: "Token/运行",
+      description: "总 Token ÷ 运行次数，反映单次使用的模型消耗强度。",
+    },
+    {
+      label: "技能覆盖",
+      value: overview.total_tool_calls ? (overview.total_skill_calls / overview.total_tool_calls) * 100 : 0,
+      unit: "%",
+      description: "技能调用 ÷ 工具总调用，越高说明用户越多依赖已配置技能能力。",
+    },
+    {
+      label: "失败率",
+      value: (overview.error_runs / totalRuns) * 100,
+      unit: "%",
+      description: "失败运行 ÷ 总运行，用来快速发现稳定性或配置问题。",
+    },
   ];
   return (
     <section className="grid gap-3 md:grid-cols-5">
-      {items.map(([label, value, unit]) => (
-        <div key={label} className="rounded-lg border border-[#F1D6D6] bg-white p-3 shadow-sm dark:border-[#462123] dark:bg-[#230D0F]">
-          <div className="text-xs text-[#7A5A5A] dark:text-[#D8B8B8]">{label}</div>
+      {items.map((item) => (
+        <div key={item.label} className="rounded-lg border border-[#F1D6D6] bg-white p-3 shadow-sm dark:border-[#462123] dark:bg-[#230D0F]" title={item.description}>
+          <div className="text-xs font-medium text-[#7A5A5A] dark:text-[#D8B8B8]">{item.label}</div>
           <div className="mt-1 text-xl font-semibold tabular-nums text-[#231815] dark:text-white">
-            {Number(value).toFixed(unit === "%" || String(value).includes(".") ? 1 : 0)}
-            <span className="ml-1 text-xs font-normal text-[#8B6B6B]">{unit}</span>
+            {Number(item.value).toFixed(item.unit === "%" || String(item.value).includes(".") ? 1 : 0)}
+            <span className="ml-1 text-xs font-normal text-[#8B6B6B]">{item.unit}</span>
           </div>
+          <p className="mt-2 line-clamp-2 text-[11px] leading-4 text-[#8B6B6B] dark:text-[#D8B8B8]">{item.description}</p>
         </div>
       ))}
     </section>
@@ -363,13 +393,13 @@ function PodiumCard({
 }) {
   const styles = {
     1: "border-[#FEEFC3] bg-[#FEF7E0] text-[#B06000] dark:border-[#F4B400]/40 dark:bg-[#F4B400]/10 dark:text-[#FDD663]",
-    2: "border-[#D2E3FC] bg-[#E8F0FE] text-[#4285F4] dark:border-[#4285F4]/40 dark:bg-[#4285F4]/10 dark:text-[#8AB4F8]",
+    2: "border-[#E5E7EB] bg-[#F8FAFC] text-[#4B5563] dark:border-[#6B7280]/40 dark:bg-white/5 dark:text-[#E5E7EB]",
     3: "border-[#FAD2CF] bg-[#FCE8E6] text-[#DB4437] dark:border-[#DB4437]/40 dark:bg-[#DB4437]/10 dark:text-[#F28B82]",
   }[rank];
 
   if (!user) {
     return (
-      <div className="flex min-h-40 flex-col justify-between rounded-lg border border-dashed border-[#DADCE0] bg-white/70 p-4 dark:border-[#213D5E] dark:bg-[#06213F]/70">
+      <div className="flex min-h-40 flex-col justify-between rounded-lg border border-dashed border-[#DADCE0] bg-white/70 p-4 dark:border-[#462123] dark:bg-[#230D0F]/70">
         <div className="text-sm text-[#5F6368]">第 {rank} 名</div>
         <div className="text-sm text-[#80868B]">暂无数据</div>
       </div>
@@ -381,8 +411,8 @@ function PodiumCard({
       type="button"
       onClick={() => onSelect(user)}
       className={cn(
-        "flex min-h-40 flex-col justify-between rounded-lg border bg-white p-4 text-left shadow-sm transition hover:-translate-y-0.5 hover:shadow-md dark:bg-[#06213F]",
-        active ? "border-[#4285F4] ring-2 ring-[#D2E3FC] dark:border-[#8AB4F8] dark:ring-[#4285F4]/20" : "border-[#DADCE0] dark:border-[#213D5E]",
+        "flex min-h-40 flex-col justify-between rounded-lg border bg-white p-4 text-left shadow-sm transition hover:-translate-y-0.5 hover:shadow-md dark:bg-[#230D0F]",
+        active ? "border-[#C1121F] ring-2 ring-[#F1D6D6] dark:border-[#F2B8BB] dark:ring-[#C1121F]/20" : "border-[#DADCE0] dark:border-[#462123]",
       )}
     >
       <div className="flex items-start justify-between gap-3">
@@ -393,11 +423,11 @@ function PodiumCard({
         {user.system_role === "admin" && <Badge variant="outline">管理员</Badge>}
       </div>
       <div>
-        <div className="mb-3 flex size-11 items-center justify-center rounded-lg bg-[#4285F4] text-base font-semibold text-white shadow-sm">
+        <div className="mb-3 flex size-11 items-center justify-center rounded-lg bg-[#C1121F] text-base font-semibold text-white shadow-sm">
           {initials(user)}
         </div>
         <div className="truncate font-semibold text-[#202124] dark:text-white">{user.email || user.user_id}</div>
-        <div className="mt-1 text-sm font-medium text-[#4285F4] dark:text-[#8AB4F8]">{scoreLabel(user, tab)}</div>
+        <div className="mt-1 text-sm font-medium text-[#C1121F] dark:text-[#F2B8BB]">{scoreLabel(user, tab)}</div>
         <div className="mt-2 flex flex-wrap gap-x-3 gap-y-1 text-xs text-[#5F6368] dark:text-slate-400">
           <span>运行 {fmtNumber(user.run_count)}</span>
           <span>问答 {fmtNumber(user.qa_count)}</span>
@@ -408,7 +438,7 @@ function PodiumCard({
   );
 }
 
-function TrendBars({ points }: { points: AdminLeaderboardTrendPoint[] }) {
+function TrendBars({ points, compact = false }: { points: AdminLeaderboardTrendPoint[]; compact?: boolean }) {
   type TrendMetric = keyof Pick<AdminLeaderboardTrendPoint, "runs" | "questions" | "users" | "tokens">;
   const [metric, setMetric] = useState<"all" | TrendMetric>("all");
   const chartId = useId().replace(/:/g, "");
@@ -418,10 +448,10 @@ function TrendBars({ points }: { points: AdminLeaderboardTrendPoint[] }) {
 
   const visible = points.slice(-32);
   const series = [
-    { key: "runs", label: "运行", color: "#4F46E5", soft: "bg-[#EEF2FF] text-[#4F46E5]" },
-    { key: "questions", label: "问答", color: "#0F766E", soft: "bg-[#ECFDF5] text-[#0F766E]" },
-    { key: "users", label: "活跃用户", color: "#B45309", soft: "bg-[#FFFBEB] text-[#B45309]" },
-    { key: "tokens", label: "Token", color: "#E11D48", soft: "bg-[#FFF1F2] text-[#E11D48]" },
+    { key: "runs", label: "运行", color: "#C1121F", soft: "bg-[#FFF1F1] text-[#C1121F]", description: "每天发起的运行次数" },
+    { key: "questions", label: "问答", color: "#0F766E", soft: "bg-[#ECFDF5] text-[#0F766E]", description: "每天产生的有效提问次数" },
+    { key: "users", label: "活跃", color: "#B45309", soft: "bg-[#FFFBEB] text-[#B45309]", description: "每天有行为的用户数量" },
+    { key: "tokens", label: "Token", color: "#7C3AED", soft: "bg-[#F5F3FF] text-[#7C3AED]", description: "每天模型输入输出 Token 总量" },
   ] as const;
   const activeMetric: TrendMetric = metric === "all" ? "runs" : metric;
   const activeSeries = series.find((item) => item.key === activeMetric) ?? series[0];
@@ -452,9 +482,11 @@ function TrendBars({ points }: { points: AdminLeaderboardTrendPoint[] }) {
     visible[0],
   );
   const displayedSeries = metric === "all" ? series : [activeSeries];
+  const totalFor = (key: TrendMetric) => visible.reduce((sum, point) => sum + Number(point[key] ?? 0), 0);
+  const activeDays = visible.filter((point) => point.runs > 0 || point.questions > 0 || point.tokens > 0).length;
   const chart = (large = false) => (
-    <div className={cn("overflow-hidden rounded-xl border border-[#E5E7EB] bg-[#F9FAFB] p-3 dark:border-[#17395F] dark:bg-[#071F3B]", large && "p-5")}>
-      <svg viewBox={`0 0 ${width} ${height}`} className={cn("w-full", large ? "h-[520px]" : "h-72")} role="img" aria-label="使用趋势折线图">
+    <div className={cn("min-w-0 overflow-hidden rounded-xl border border-[#E5E7EB] bg-[#F9FAFB] p-3 dark:border-[#3F3F46] dark:bg-[#18181B]", large && "p-5")}>
+      <svg viewBox={`0 0 ${width} ${height}`} className={cn("w-full", large ? "h-[520px]" : compact ? "h-56" : "h-72")} role="img" aria-label="使用趋势折线图">
         <defs>
           <linearGradient id={`trend-area-${chartId}-${activeMetric}`} x1="0" x2="0" y1="0" y2="1">
             <stop offset="0%" stopColor={activeSeries.color} stopOpacity="0.22" />
@@ -471,7 +503,7 @@ function TrendBars({ points }: { points: AdminLeaderboardTrendPoint[] }) {
                 y1={y}
                 y2={y}
                 stroke="currentColor"
-                className="text-[#E5E7EB] dark:text-[#17395F]"
+                className="text-[#E5E7EB] dark:text-[#3F3F46]"
                 strokeWidth="1"
               />
               <text x={12} y={y + 4} className="fill-[#9CA3AF] text-[11px]">
@@ -526,8 +558,61 @@ function TrendBars({ points }: { points: AdminLeaderboardTrendPoint[] }) {
     </div>
   );
 
+  if (compact) {
+    return (
+      <div className="min-w-0 space-y-3">
+        <div className="grid gap-2 sm:grid-cols-4">
+          {series.map((item) => (
+            <button
+              key={item.key}
+              type="button"
+              onClick={() => setMetric(item.key)}
+              className={cn(
+                "min-w-0 rounded-lg border px-3 py-2 text-left transition hover:border-[#C1121F]",
+                metric === item.key
+                  ? "border-[#C1121F] bg-[#FFF1F1] dark:bg-[#3A1215]"
+                  : "border-[#F1D6D6] bg-white dark:border-[#462123] dark:bg-[#230D0F]",
+              )}
+              title={item.description}
+            >
+              <span className={cn("inline-flex rounded-full px-2 py-0.5 text-xs font-medium", item.soft)}>{item.label}</span>
+              <span className="mt-2 block truncate text-base font-semibold tabular-nums text-[#231815] dark:text-white">
+                {fmtNumber(totalFor(item.key))}
+              </span>
+              <span className="mt-1 block truncate text-[11px] text-[#8B6B6B] dark:text-[#D8B8B8]">{item.description}</span>
+            </button>
+          ))}
+        </div>
+        <div className="flex flex-wrap items-center justify-between gap-2 text-xs text-[#7A5A5A] dark:text-[#D8B8B8]">
+          <span>每个点代表 1 天；当前显示 {metric === "all" ? "全部指标" : activeSeries.label}，覆盖 {activeDays} 个活跃日。</span>
+          <Dialog>
+            <DialogTrigger asChild>
+              <Button variant="outline" size="sm" className="h-8">
+                <Maximize2 className="mr-1 size-4" />
+                放大
+              </Button>
+            </DialogTrigger>
+            <DialogContent className="max-w-[min(1180px,calc(100vw-2rem))]">
+              <DialogHeader>
+                <DialogTitle>个人使用趋势</DialogTitle>
+                <DialogDescription>
+                  每个折线点代表一天。运行=发起次数，问答=有效提问，活跃=有行为的用户数，Token=模型输入输出消耗。
+                </DialogDescription>
+              </DialogHeader>
+              {chart(true)}
+            </DialogContent>
+          </Dialog>
+        </div>
+        {chart(false)}
+      </div>
+    );
+  }
+
   return (
     <div className="space-y-4">
+      <p className="text-xs leading-5 text-[#7A5A5A] dark:text-[#D8B8B8]">
+        每个折线点代表一天；点击指标卡可单独查看运行、问答、活跃或 Token，全部趋势会同时展示四条多色折线。
+      </p>
       <div className="flex flex-wrap items-center justify-between gap-3">
         <div className="grid gap-2 sm:grid-cols-2 xl:grid-cols-5">
           <button
@@ -583,13 +668,13 @@ function TrendBars({ points }: { points: AdminLeaderboardTrendPoint[] }) {
         </Dialog>
       </div>
       <div className="grid gap-3 lg:grid-cols-[220px_minmax(0,1fr)]">
-        <div className="rounded-xl border border-[#E5E7EB] bg-white p-4 dark:border-[#17395F] dark:bg-[#071F3B]">
-          <div className="text-xs text-[#6B7280] dark:text-slate-400">最新 {metric === "all" ? "运行" : activeSeries.label}</div>
+        <div className="rounded-xl border border-[#F1D6D6] bg-white p-4 dark:border-[#462123] dark:bg-[#230D0F]">
+          <div className="text-xs text-[#7A5A5A] dark:text-[#D8B8B8]">最新 {metric === "all" ? "运行" : activeSeries.label}</div>
           <div className="mt-2 text-3xl font-semibold tabular-nums text-[#111827] dark:text-white">{fmtNumber(latestValue)}</div>
-          <div className={cn("mt-2 text-sm", delta >= 0 ? "text-[#0F766E]" : "text-[#E11D48]")}>
+          <div className={cn("mt-2 text-sm", delta >= 0 ? "text-[#C1121F]" : "text-[#7F1D1D] dark:text-[#FCA5A5]")}>
             较上一日 {delta >= 0 ? "+" : ""}{fmtNumber(delta)}
           </div>
-          <div className="mt-3 text-xs text-[#6B7280] dark:text-slate-400">
+          <div className="mt-3 text-xs text-[#7A5A5A] dark:text-[#D8B8B8]">
             峰值 {peak.date.slice(5)} / {fmtNumber(Number(peak[activeMetric] ?? 0))}
           </div>
         </div>
@@ -616,7 +701,7 @@ function UserTable({
   }
 
   return (
-    <div className="overflow-hidden rounded-lg border border-[#DADCE0] bg-white dark:border-[#213D5E] dark:bg-[#06213F]">
+    <div className="overflow-hidden rounded-lg border border-[#F1D6D6] bg-white dark:border-[#462123] dark:bg-[#230D0F]">
       {users.map((user, index) => {
         const score = userScore(user, tab);
         return (
@@ -625,11 +710,11 @@ function UserTable({
             type="button"
             onClick={() => onSelect(user)}
             className={cn(
-              "grid w-full grid-cols-[44px_minmax(0,1fr)_minmax(160px,240px)_120px] items-center gap-4 border-b border-[#EEF0F1] px-4 py-3 text-left last:border-b-0 hover:bg-[#F8FAFD] dark:border-[#17395F] dark:hover:bg-[#0B2A50]",
-              selectedUserId === user.user_id && "bg-[#E8F0FE] dark:bg-[#4285F4]/10",
+              "grid w-full grid-cols-[44px_minmax(0,1fr)_minmax(160px,240px)_120px] items-center gap-4 border-b border-[#F1D6D6] px-4 py-3 text-left last:border-b-0 hover:bg-[#FFF7F7] dark:border-[#462123] dark:hover:bg-[#19090A]",
+              selectedUserId === user.user_id && "bg-[#FFF1F1] dark:bg-[#C1121F]/10",
             )}
           >
-            <div className="flex size-8 items-center justify-center rounded-md bg-[#F1F3F4] text-sm font-semibold text-[#5F6368] dark:bg-[#11345E] dark:text-slate-200">
+            <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}
             </div>
             <div className="min-w-0">
@@ -642,9 +727,9 @@ function UserTable({
               </div>
             </div>
             <div>
-              <div className="h-2 rounded-full bg-[#E8EAED] dark:bg-[#11345E]">
+              <div className="h-2 rounded-full bg-[#F1D6D6] dark:bg-[#3A1215]">
                 <div
-                  className="h-2 rounded-full bg-[#4285F4]"
+                  className="h-2 rounded-full bg-[#C1121F]"
                   style={{ width: `${Math.max(4, (score / max) * 100)}%` }}
                 />
               </div>
@@ -678,7 +763,7 @@ function SkillRanking({
 }) {
   const max = Math.max(1, ...items.map((item) => item.call_count));
   return (
-    <section className="rounded-lg border border-[#DADCE0] bg-white p-4 shadow-sm dark:border-[#213D5E] dark:bg-[#06213F]">
+    <section className="rounded-lg border border-[#F1D6D6] bg-white p-4 shadow-sm dark:border-[#462123] dark:bg-[#230D0F]">
       <div className="mb-4 flex items-center justify-between gap-3">
         <div className="flex items-center gap-2">
           <Icon className="size-4 text-[#5F6368] dark:text-slate-300" />
@@ -698,7 +783,7 @@ function SkillRanking({
                   {fmtNumber(item.user_count)} 人
                 </span>
               </div>
-              <div className="mt-2 h-2 rounded-full bg-[#E8EAED] dark:bg-[#11345E]">
+              <div className="mt-2 h-2 rounded-full bg-[#F1D6D6] dark:bg-[#3A1215]">
                 <div
                   className="h-2 rounded-full"
                   style={{
@@ -736,7 +821,7 @@ function DimensionRanking({
 }) {
   const max = Math.max(1, ...items.map((item) => item.count));
   return (
-    <section className="rounded-lg border border-[#DADCE0] bg-white p-4 shadow-sm dark:border-[#213D5E] dark:bg-[#06213F]">
+    <section className="rounded-lg border border-[#F1D6D6] bg-white p-4 shadow-sm dark:border-[#462123] dark:bg-[#230D0F]">
       <div className="mb-4 flex items-center justify-between gap-3">
         <div className="flex items-center gap-2">
           <Icon className="size-4 text-[#5F6368] dark:text-slate-300" />
@@ -756,7 +841,7 @@ function DimensionRanking({
                   {fmtNumber(item.user_count)} 人
                 </span>
               </div>
-              <div className="mt-2 h-2 rounded-full bg-[#E8EAED] dark:bg-[#11345E]">
+              <div className="mt-2 h-2 rounded-full bg-[#F1D6D6] dark:bg-[#3A1215]">
                 <div
                   className="h-2 rounded-full"
                   style={{
@@ -790,8 +875,8 @@ function QuestionPanel({
   showUser?: boolean;
 }) {
   return (
-    <section className="flex h-[430px] flex-col overflow-hidden rounded-lg border border-[#DADCE0] bg-white shadow-sm dark:border-[#213D5E] dark:bg-[#06213F]">
-      <div className="flex items-center justify-between gap-3 border-b border-[#EEF0F1] px-4 py-3 dark:border-[#17395F]">
+    <section className="flex h-[430px] flex-col overflow-hidden rounded-lg border border-[#F1D6D6] bg-white shadow-sm dark:border-[#462123] dark:bg-[#230D0F]">
+      <div className="flex items-center justify-between gap-3 border-b border-[#F1D6D6] px-4 py-3 dark:border-[#462123]">
         <div className="flex items-center gap-2">
           <MessageSquareText className="size-4 text-[#5F6368] dark:text-slate-300" />
           <h2 className="font-semibold text-[#202124] dark:text-white">{title}</h2>
@@ -799,7 +884,7 @@ function QuestionPanel({
         <Badge variant="outline">{items.length}</Badge>
       </div>
       <ScrollArea className="min-h-0 flex-1">
-        <div className="divide-y divide-[#EEF0F1] dark:divide-[#17395F]">
+        <div className="divide-y divide-[#F1D6D6] dark:divide-[#462123]">
           {items.length === 0 && <div className="py-12 text-center text-sm text-[#5F6368]">暂无问题记录</div>}
           {items.map((item, index) => (
             <div key={`${item.run_id || item.text}-${index}`} className="px-4 py-3">
@@ -881,16 +966,13 @@ function UserDetailPanel({
           </div>
         </section>
 
-        <Tabs defaultValue="skills" className="space-y-3">
+        <Tabs defaultValue="questions" 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="skills">技能</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>
@@ -899,7 +981,10 @@ function UserDetailPanel({
               <TrendingUp className="size-4 text-[#C1121F]" />
               个人使用趋势
             </div>
-            <TrendBars points={data.trends} />
+            <TrendBars points={data.trends} compact />
+          </TabsContent>
+          <TabsContent value="skills" className="min-h-[420px]">
+            <SkillRanking title="个人常用技能" icon={Sparkles} items={data.skills} empty="暂无技能调用" />
           </TabsContent>
           <TabsContent value="dimensions" className="min-h-[420px]">
             <div className="grid gap-3">
@@ -920,14 +1005,23 @@ export default function AdminUserLeaderboardPage() {
   const [tab, setTab] = useState<UserRankTab>("activity");
   const [query, setQuery] = useState("");
   const [groupRules, setGroupRules] = useState("zero,two");
+  const [showGroupStats, setShowGroupStats] = useState(false);
   const [selectedUserId, setSelectedUserId] = useState<string | null>(null);
   const apiRange = useMemo(
     () => rangeForApi(range),
     [range],
   );
   const { data, isLoading, error } = useUserLeaderboard(apiRange, 100);
-  const reportMutation = useGenerateUserLeaderboardReport();
   const [reportOpen, setReportOpen] = useState(false);
+  const { models: reportModels, isLoading: reportModelsLoading } = useModels({ enabled: reportOpen });
+  const [reportModelName, setReportModelName] = useState(DEFAULT_REPORT_MODEL);
+  const [reportText, setReportText] = useState("");
+  const [reportError, setReportError] = useState<string | null>(null);
+  const [reportStatus, setReportStatus] = useState<"idle" | "streaming" | "done" | "cached" | "error">("idle");
+  const [reportGeneratedAt, setReportGeneratedAt] = useState<string | null>(null);
+  const [reportResolvedModel, setReportResolvedModel] = useState<string | null>(null);
+  const reportAbortRef = useRef<AbortController | null>(null);
+  const reportGenerating = reportStatus === "streaming";
 
   const rankedUsers = useMemo(() => {
     const base = data?.users_by_activity ?? [];
@@ -964,6 +1058,92 @@ export default function AdminUserLeaderboardPage() {
     setRange(defaultRange(days));
   };
 
+  const handleReportOpenChange = (open: boolean) => {
+    setReportOpen(open);
+    if (!open) {
+      reportAbortRef.current?.abort();
+      reportAbortRef.current = null;
+    }
+  };
+
+  const startReportGeneration = async () => {
+    reportAbortRef.current?.abort();
+    const controller = new AbortController();
+    reportAbortRef.current = controller;
+    const selectedModelName = reportModelName === DEFAULT_REPORT_MODEL ? undefined : reportModelName;
+    let terminalEventSeen = false;
+
+    setReportText("");
+    setReportError(null);
+    setReportGeneratedAt(null);
+    setReportResolvedModel(selectedModelName ?? null);
+    setReportStatus("streaming");
+
+    try {
+      await streamUserLeaderboardReport({
+        range: apiRange,
+        limit: 40,
+        modelName: selectedModelName,
+        signal: controller.signal,
+        onEvent: (event) => {
+          if (event.event === "meta") {
+            setReportResolvedModel(event.data.model_name ?? selectedModelName ?? null);
+            return;
+          }
+          if (event.event === "cached") {
+            terminalEventSeen = true;
+            setReportText(event.data.report);
+            setReportGeneratedAt(event.data.generated_at ?? null);
+            setReportResolvedModel(event.data.model_name ?? selectedModelName ?? null);
+            setReportStatus("cached");
+            return;
+          }
+          if (event.event === "text") {
+            setReportText((value) => value + event.data.chunk);
+            return;
+          }
+          if (event.event === "done") {
+            terminalEventSeen = true;
+            if (event.data.report) setReportText(event.data.report);
+            setReportGeneratedAt(event.data.generated_at ?? null);
+            setReportResolvedModel(event.data.model_name ?? selectedModelName ?? null);
+            setReportStatus(event.data.cached ? "cached" : "done");
+            return;
+          }
+          if (event.event === "error") {
+            terminalEventSeen = true;
+            setReportError(event.data.message);
+            setReportStatus("error");
+          }
+        },
+      });
+      if (!terminalEventSeen && !controller.signal.aborted) {
+        setReportStatus("done");
+      }
+    } catch (err) {
+      if (!controller.signal.aborted) {
+        setReportError(err instanceof Error ? err.message : String(err));
+        setReportStatus("error");
+      }
+    } finally {
+      if (reportAbortRef.current === controller) {
+        reportAbortRef.current = null;
+      }
+    }
+  };
+
+  useEffect(() => {
+    return () => reportAbortRef.current?.abort();
+  }, []);
+
+  useEffect(() => {
+    setReportText("");
+    setReportError(null);
+    setReportGeneratedAt(null);
+    setReportResolvedModel(null);
+    setReportStatus("idle");
+  }, [apiRange.since, apiRange.until, reportModelName]);
+
   return (
     <div className="flex size-full min-h-0 bg-[#FFF7F7] text-[#231815] dark:bg-[#19090A] dark:text-white">
       <main className="flex min-w-0 flex-1 flex-col">
@@ -1010,21 +1190,11 @@ export default function AdminUserLeaderboardPage() {
                 <FileDown className="mr-1 size-4" />
                 导出 Excel
               </Button>
-              <Dialog open={reportOpen} onOpenChange={setReportOpen}>
+              <Dialog open={reportOpen} onOpenChange={handleReportOpenChange}>
                 <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 variant="outline" size="sm" disabled={!data} className="h-9">
+                    <Sparkles className="mr-1 size-4" />
+                    AI 报告
                   </Button>
                 </DialogTrigger>
                 <DialogContent className="max-w-[min(920px,calc(100vw-2rem))]">
@@ -1034,32 +1204,61 @@ export default function AdminUserLeaderboardPage() {
                       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>
+                  <div className="flex flex-wrap items-center justify-between gap-3 rounded-lg border border-[#F1D6D6] bg-white p-3 dark:border-[#462123] dark:bg-[#230D0F]">
+                    <div className="flex min-w-0 flex-wrap items-center gap-2">
+                      <Select value={reportModelName} onValueChange={setReportModelName} disabled={reportGenerating || reportModelsLoading}>
+                        <SelectTrigger className="h-9 w-[260px] border-[#F1D6D6] bg-white dark:border-[#462123] dark:bg-[#19090A]">
+                          <SelectValue placeholder="选择报告模型" />
+                        </SelectTrigger>
+                        <SelectContent>
+                          <SelectItem value={DEFAULT_REPORT_MODEL}>默认模型</SelectItem>
+                          {reportModels.map((model) => (
+                            <SelectItem key={model.name} value={model.name}>
+                              {model.display_name || model.name}
+                            </SelectItem>
+                          ))}
+                        </SelectContent>
+                      </Select>
+                      {reportStatus === "cached" && <Badge variant="outline">已读取缓存</Badge>}
+                      {reportResolvedModel && <Badge variant="outline">模型 {reportResolvedModel}</Badge>}
+                      {reportGeneratedAt && <span className="text-xs text-[#7A5A5A] dark:text-[#D8B8B8]">生成于 {fmtTime(reportGeneratedAt)}</span>}
+                    </div>
+                    <Button size="sm" onClick={startReportGeneration} disabled={!data || reportGenerating}>
+                      {reportGenerating ? <Loader2 className="mr-1 size-4 animate-spin" /> : <Sparkles className="mr-1 size-4" />}
+                      {reportGenerating ? "生成中" : "生成报告"}
+                    </Button>
+                  </div>
                   <ScrollArea className="max-h-[70vh] rounded-lg border border-[#F1D6D6] bg-[#FFF7F7] p-4 dark:border-[#462123] dark:bg-[#19090A]">
-                    {reportMutation.isPending && (
+                    {reportStatus === "idle" && !reportText && (
+                      <div className="flex items-center justify-center py-12 text-sm text-[#7A5A5A] dark:text-[#D8B8B8]">
+                        选择模型后点击生成；同一时间段、同一模型和同一统计设置会直接读取已保存报告。
+                      </div>
+                    )}
+                    {reportGenerating && !reportText && (
                       <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
+                        正在调用大模型生成报告，内容会流式显示
                       </div>
                     )}
-                    {reportMutation.error && (
+                    {reportError && (
                       <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}
+                        生成失败：{reportError}
                       </div>
                     )}
-                    {reportMutation.data?.report && (
+                    {reportText && (
                       <pre className="whitespace-pre-wrap font-sans text-sm leading-7 text-[#231815] dark:text-white">
-                        {reportMutation.data.report}
+                        {reportText}
                       </pre>
                     )}
                   </ScrollArea>
-                  {reportMutation.data?.report && (
+                  {reportText && (
                     <div className="flex justify-end">
                       <Button
                         variant="outline"
                         onClick={() =>
                           downloadText(
                             `user-leaderboard-ai-report-${new Date().toISOString().slice(0, 10)}.md`,
-                            reportMutation.data.report,
+                            reportText,
                             "text/markdown;charset=utf-8",
                           )
                         }
@@ -1079,7 +1278,7 @@ export default function AdminUserLeaderboardPage() {
                   onClick={(event) => event.currentTarget.showPicker?.()}
                   onFocus={(event) => event.currentTarget.showPicker?.()}
                   onChange={(event) => setRange((prev) => ({ ...prev, since: event.target.value }))}
-                  className="h-9 w-36 bg-white dark:bg-[#0B2A50]"
+                  className="h-9 w-36 bg-white dark:bg-[#19090A]"
                 />
               </div>
               <div className="flex flex-col gap-1">
@@ -1090,7 +1289,7 @@ export default function AdminUserLeaderboardPage() {
                   onClick={(event) => event.currentTarget.showPicker?.()}
                   onFocus={(event) => event.currentTarget.showPicker?.()}
                   onChange={(event) => setRange((prev) => ({ ...prev, until: event.target.value }))}
-                  className="h-9 w-36 bg-white dark:bg-[#0B2A50]"
+                  className="h-9 w-36 bg-white dark:bg-[#19090A]"
                 />
               </div>
               <Button variant="outline" size="sm" onClick={() => setQuickRange(7)}>
@@ -1124,21 +1323,29 @@ export default function AdminUserLeaderboardPage() {
             {!isLoading && data && overview && (
               <>
                 <div className="grid gap-3 md:grid-cols-2 xl:grid-cols-4">
-                  <StatCard icon={Users} accent="indigo" label="总用户" value={fmtNumber(overview.total_users)} note={`${fmtNumber(overview.active_users)} 位在当前时间段活跃`} />
+                  <StatCard icon={Users} accent="crimson" label="总用户" value={fmtNumber(overview.total_users)} note={`${fmtNumber(overview.active_users)} 位在当前时间段活跃`} />
                   <StatCard icon={MousePointerClick} accent="teal" label="使用次数" value={fmtNumber(overview.total_runs)} note={`${fmtNumber(overview.total_threads)} 个会话被创建`} />
                   <StatCard icon={MessageSquareText} accent="amber" label="问答次数" value={fmtNumber(overview.total_questions)} note={`失败运行 ${fmtNumber(overview.error_runs)} 次`} />
                   <StatCard icon={Sparkles} accent="rose" label="技能调用" value={fmtNumber(overview.total_skill_calls)} note={`工具总调用 ${fmtNumber(overview.total_tool_calls)} 次`} />
                 </div>
                 <InsightStrip overview={overview} />
 
-                <GroupComparison
-                  users={rankedUsers}
-                  rulesText={groupRules}
-                  onRulesChange={setGroupRules}
-                  onSelectUser={(user) => setSelectedUserId(user.user_id)}
-                />
+                <div className="flex justify-end">
+                  <Button variant="ghost" size="sm" onClick={() => setShowGroupStats((value) => !value)}>
+                    <Users className="mr-1 size-4" />
+                    {showGroupStats ? "隐藏分组统计" : "显示分组统计"}
+                  </Button>
+                </div>
+                {showGroupStats && (
+                  <GroupComparison
+                    users={rankedUsers}
+                    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]">
+                <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-center justify-between gap-3">
                     <div>
                       <h2 className="font-semibold text-[#202124] dark:text-white">榜单前三</h2>
@@ -1177,7 +1384,7 @@ export default function AdminUserLeaderboardPage() {
                           value={query}
                           onChange={(event) => setQuery(event.target.value)}
                           placeholder="搜索用户邮箱或 ID"
-                          className="h-9 w-64 bg-white pl-8 dark:bg-[#0B2A50]"
+                          className="h-9 w-64 bg-white pl-8 dark:bg-[#19090A]"
                         />
                       </div>
                     </div>
@@ -1189,8 +1396,8 @@ export default function AdminUserLeaderboardPage() {
                     />
                   </section>
 
-                  <section className="overflow-hidden rounded-lg border border-[#DADCE0] bg-white shadow-sm dark:border-[#213D5E] dark:bg-[#06213F]">
-                    <div className="flex items-center gap-2 border-b border-[#EEF0F1] px-4 py-3 dark:border-[#17395F]">
+                  <section className="overflow-hidden rounded-lg border border-[#F1D6D6] bg-white shadow-sm dark:border-[#462123] dark:bg-[#230D0F]">
+                    <div className="flex items-center gap-2 border-b border-[#F1D6D6] px-4 py-3 dark:border-[#462123]">
                       <UserRound className="size-4 text-[#5F6368] dark:text-slate-300" />
                       <h2 className="font-semibold text-[#202124] dark:text-white">用户详情</h2>
                     </div>
@@ -1206,7 +1413,7 @@ export default function AdminUserLeaderboardPage() {
                   </section>
                 </div>
 
-                <section className="rounded-lg border border-[#DADCE0] bg-white p-4 shadow-sm dark:border-[#213D5E] dark:bg-[#06213F]">
+                <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-center justify-between gap-3">
                     <div className="flex items-center gap-2">
                       <TrendingUp className="size-4 text-[#5F6368] dark:text-slate-300" />
diff --git a/frontend-web/src/pages/PublicScheduledTaskPage.tsx b/frontend-web/src/pages/PublicScheduledTaskPage.tsx
index 438632fa..a57f653c 100644
--- a/frontend-web/src/pages/PublicScheduledTaskPage.tsx
+++ b/frontend-web/src/pages/PublicScheduledTaskPage.tsx
@@ -39,6 +39,7 @@ import {
   TooltipTrigger,
 } from "@/components/ui/tooltip";
 import { MarkdownContent } from "@/components/workspace/messages/markdown-content";
+import { HtmlPreviewFrame } from "@/components/html-preview-frame";
 import { getBackendBaseURL } from "@/core/config";
 import { downloadMarkdownAsDocx } from "@/core/scheduled-tasks/markdown-docx";
 import { reasoningPlugins } from "@/core/streamdown";
@@ -953,10 +954,8 @@ function RunDetailPane({ run, taskId }: { run: PublicRun; taskId: string }) {
               )}
               {activeTabMeta?.kind === "html" ? (
                 htmlContent ? (
-                  <iframe
-                    title="HTML 预览"
-                    sandbox="allow-same-origin"
-                    srcDoc={htmlContent}
+                  <HtmlPreviewFrame
+                    html={htmlContent}
                     className="min-h-[60vh] w-full flex-1 rounded-md border bg-white"
                   />
                 ) : (
diff --git a/frontend-web/src/pages/ScheduledTaskRunDetailPage.tsx b/frontend-web/src/pages/ScheduledTaskRunDetailPage.tsx
index 31bc8438..2f9cad01 100644
--- a/frontend-web/src/pages/ScheduledTaskRunDetailPage.tsx
+++ b/frontend-web/src/pages/ScheduledTaskRunDetailPage.tsx
@@ -18,6 +18,7 @@ import {
   WorkspaceHeader,
 } from "@/components/workspace/workspace-container";
 import { MarkdownContent } from "@/components/workspace/messages/markdown-content";
+import { HtmlPreviewFrame } from "@/components/html-preview-frame";
 import {
   downloadScheduledTaskRun,
   downloadScheduledTaskRunFile,
@@ -100,22 +101,6 @@ function RenderPreview({ file }: { file: ScheduledTaskResultFileContent }) {
   return <pre className="whitespace-pre-wrap break-words text-sm">{file.content}</pre>;
 }
 
-/**
- * Sandboxed preview of a generated HTML document. The iframe has no
- * ``allow-scripts`` token, so embedded JS cannot run — defense-in-depth on top
- * of the server-side sanitization that already stripped script vectors.
- */
-function HtmlPreviewFrame({ html }: { html: string }) {
-  return (
-    <iframe
-      title="HTML 预览"
-      sandbox="allow-same-origin"
-      srcDoc={html}
-      className="h-[70vh] w-full rounded-md border bg-white"
-    />
-  );
-}
-
 type EditState = { draft: string; saving: boolean };
 
 /** Flatten a LangChain-style message content (string | parts | nested) to text. */
diff --git a/frontend-web/src/roundtable-planning/components/ArtifactPreviewModal.tsx b/frontend-web/src/roundtable-planning/components/ArtifactPreviewModal.tsx
index b5df69ec..7d1f5d97 100644
--- a/frontend-web/src/roundtable-planning/components/ArtifactPreviewModal.tsx
+++ b/frontend-web/src/roundtable-planning/components/ArtifactPreviewModal.tsx
@@ -5,7 +5,11 @@ import remarkGfm from "remark-gfm";
 import { Download, FileText, Loader2, X } from "lucide-react";
 
 import { apiFetch } from "@/core/api/fetch-client";
-import { createMarkdownAnchorResolver } from "@/core/utils/markdown";
+import {
+  createMarkdownAnchorResolver,
+  isInPageAnchor,
+  scrollToInPageAnchor,
+} from "@/core/utils/markdown";
 import { buildArtifactDownloadUrl } from "@/roundtable-planning/api/multi-agent";
 
 interface ArtifactPreviewModalProps {
@@ -74,13 +78,20 @@ function createMarkdownComponents(content: string) {
         </span>
       );
     }
+    const finalHref = resolvedHref ?? href;
     const isExternal = typeof href === "string" && /^https?:\/\//i.test(href);
     return (
       <a
-        href={resolvedHref ?? href}
+        href={finalHref}
         target={isExternal ? "_blank" : undefined}
         rel={isExternal ? "noopener noreferrer" : undefined}
         className="text-primary underline hover:opacity-80"
+        onClick={(event) => {
+          if (isInPageAnchor(finalHref)) {
+            event.preventDefault();
+            scrollToInPageAnchor(event.currentTarget, finalHref);
+          }
+        }}
       >
         {children}
       </a>
@@ -203,7 +214,10 @@ export const ArtifactPreviewModal: React.FC<ArtifactPreviewModalProps> = ({
         </div>
 
         {/* Body */}
-        <div className="flex-1 min-h-0 overflow-y-auto px-5 py-4 text-sm text-slate-700">
+        <div
+          data-markdown-anchor-root
+          className="flex-1 min-h-0 overflow-y-auto px-5 py-4 text-sm text-slate-700"
+        >
           {loading ? (
             <div className="flex items-center justify-center gap-2 py-12 text-slate-400">
               <Loader2 className="w-4 h-4 animate-spin text-primary" />
diff --git a/offline-backend-20260512/backend/app/gateway/routers/admin_users.py b/offline-backend-20260512/backend/app/gateway/routers/admin_users.py
index ec92e8fc..ef5a2ece 100644
--- a/offline-backend-20260512/backend/app/gateway/routers/admin_users.py
+++ b/offline-backend-20260512/backend/app/gateway/routers/admin_users.py
@@ -16,22 +16,27 @@ from __future__ import annotations
 import json
 import logging
 import re
+from collections.abc import AsyncIterator
 from difflib import SequenceMatcher
+from hashlib import sha256
 
 from datetime import datetime, timedelta
 
-from fastapi import APIRouter, HTTPException, Query, Request
+from fastapi import APIRouter, Depends, HTTPException, Query, Request
+from fastapi.responses import StreamingResponse
 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_config,
     get_agent_store,
     get_checkpointer,
     get_current_user_from_request,
     get_thread_store,
 )
 from deerflow.agents.memory import BuiltinFileProvider
+from deerflow.config.app_config import AppConfig
 from deerflow.config.paths import get_paths
 from deerflow.config.system_settings import load_system_settings
 from deerflow.models import create_chat_model
@@ -165,6 +170,8 @@ class AdminUserAnalyticsResponse(BaseModel):
 class AdminLeaderboardReportResponse(BaseModel):
     report: str
     generated_at: str
+    cached: bool = False
+    model_name: str | None = None
 
 
 def _now() -> datetime:
@@ -242,6 +249,108 @@ def _message_content_to_text(content) -> str:
     return str(content or "")
 
 
+def _sse(event: str, data: dict) -> str:
+    return f"event: {event}\ndata: {json.dumps(data, ensure_ascii=False)}\n\n"
+
+
+def _extract_chunk_parts(chunk: object) -> tuple[str, str]:
+    """Return (thinking_delta, text_delta) from a LangChain streaming chunk."""
+    thinking = ""
+    text = ""
+    content = getattr(chunk, "content", "")
+    if isinstance(content, str):
+        text = content
+    elif isinstance(content, list):
+        for block in content:
+            if isinstance(block, str):
+                text += block
+            elif isinstance(block, dict):
+                block_type = block.get("type", "")
+                if block_type in {"thinking", "thinking_delta"}:
+                    thinking += block.get("thinking", "")
+                elif block_type in {"text", "text_delta"}:
+                    text += block.get("text", "")
+                elif block_type == "reasoning":
+                    thinking += block.get("content", "")
+    if not thinking:
+        kwargs = getattr(chunk, "additional_kwargs", {}) or {}
+        reasoning = kwargs.get("reasoning_content") or ""
+        if isinstance(reasoning, str):
+            thinking = reasoning
+    return thinking, text
+
+
+def _report_cache_file():
+    return get_paths().base_dir / "admin_leaderboard_reports.json"
+
+
+def _load_report_cache() -> dict:
+    path = _report_cache_file()
+    if not path.exists():
+        return {}
+    try:
+        data = json.loads(path.read_text(encoding="utf-8"))
+    except Exception:
+        logger.warning("Failed to read leaderboard report cache: %s", path, exc_info=True)
+        return {}
+    return data if isinstance(data, dict) else {}
+
+
+def _save_report_cache(cache: dict) -> None:
+    path = _report_cache_file()
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(json.dumps(cache, ensure_ascii=False, indent=2), encoding="utf-8")
+
+
+def _resolve_report_model_name(config: AppConfig, model_name: str | None) -> str | None:
+    cleaned = (model_name or "").strip()
+    if cleaned:
+        return cleaned
+    return config.models[0].name if config.models else None
+
+
+def _report_cache_key(
+    *,
+    since: datetime,
+    until: datetime,
+    limit: int,
+    model_name: str | None,
+    settings,
+) -> str:
+    payload = {
+        "version": 3,
+        "since": _iso(since),
+        "until": _iso(until),
+        "limit": limit,
+        "model_name": model_name,
+        "settings": {
+            "exclude_user_ids": sorted(uid for uid in settings.exclude_user_ids if uid),
+            "include_scheduled": settings.include_scheduled,
+            "include_admins": settings.include_admins,
+            "include_failed": settings.include_failed,
+            "cleanup_system_questions": settings.cleanup_system_questions,
+        },
+    }
+    raw = json.dumps(payload, ensure_ascii=False, sort_keys=True, default=str)
+    return sha256(raw.encode("utf-8")).hexdigest()
+
+
+def _cached_report(cache_key: str) -> dict | None:
+    item = _load_report_cache().get(cache_key)
+    if isinstance(item, dict) and isinstance(item.get("report"), str):
+        return item
+    return None
+
+
+def _store_report_cache(cache_key: str, item: dict) -> None:
+    cache = _load_report_cache()
+    cache[cache_key] = item
+    if len(cache) > 80:
+        ordered = sorted(cache.items(), key=lambda kv: str(kv[1].get("generated_at") or ""))
+        cache = dict(ordered[-80:])
+    _save_report_cache(cache)
+
+
 def _run_time_filter(since: datetime, until: datetime):
     return and_(RunRow.created_at >= since, RunRow.created_at <= until)
 
@@ -360,7 +469,7 @@ async def _query_user_leaderboard(
         select(
             ToolCallMetricRow.user_id.label("user_id"),
             func.count(ToolCallMetricRow.id).label("tool_call_count"),
-            func.sum(case((func.coalesce(func.nullif(ToolCallMetricRow.skill_name, ""), func.nullif(ToolCallMetricRow.tool_name, "")).is_not(None), 1), else_=0)).label("skill_call_count"),
+            func.sum(case((func.nullif(ToolCallMetricRow.skill_name, "").is_not(None), 1), else_=0)).label("skill_call_count"),
         )
         .where(_tool_time_filter(since, until))
         .group_by(ToolCallMetricRow.user_id)
@@ -433,11 +542,7 @@ async def _query_call_rankings(
     include_admins: bool = True,
 ) -> list[AdminLeaderboardSkill]:
     exclude_user_ids = exclude_user_ids or set()
-    name_col = (
-        func.coalesce(func.nullif(ToolCallMetricRow.skill_name, ""), func.nullif(ToolCallMetricRow.tool_name, ""))
-        if field == "skill"
-        else ToolCallMetricRow.tool_name
-    )
+    name_col = ToolCallMetricRow.skill_name if field == "skill" else ToolCallMetricRow.tool_name
     call_count = func.count(ToolCallMetricRow.id).label("call_count")
     last_used_at = func.max(ToolCallMetricRow.created_at).label("last_used_at")
     stmt = (
@@ -822,7 +927,7 @@ async def _query_overview(
     tool_row = (await session.execute(
         select(
             func.count(ToolCallMetricRow.id),
-            func.sum(case((func.coalesce(func.nullif(ToolCallMetricRow.skill_name, ""), func.nullif(ToolCallMetricRow.tool_name, "")).is_not(None), 1), else_=0)),
+            func.sum(case((func.nullif(ToolCallMetricRow.skill_name, "").is_not(None), 1), else_=0)),
         ).where(*tool_where)
     )).one()
 
@@ -912,22 +1017,13 @@ 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)
+async def _build_leaderboard_report_prompt(
+    session_factory,
+    settings,
+    since_dt: datetime,
+    until_dt: datetime,
+    limit: int,
+) -> str:
     excluded = {uid for uid in settings.exclude_user_ids if uid}
     common = {
         "exclude_user_ids": excluded,
@@ -951,6 +1047,10 @@ async def generate_user_leaderboard_report(
         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)
@@ -963,11 +1063,13 @@ async def generate_user_leaderboard_report(
         "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:]],
+        "agents": [a.model_dump() for a in agents[:12]],
+        "run_statuses": [s.model_dump() for s in run_statuses[:12]],
+        "frequent_questions": [q.model_dump() for q in frequent_questions[:30]],
+        "recent_questions": [q.model_dump() for q in recent_questions[:40]],
+        "trends": [t.model_dump() for t in trends[-21:]],
     }
-    prompt = (
+    return (
         "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；"
@@ -976,12 +1078,46 @@ async def generate_user_leaderboard_report(
         "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。"
+        "输出结构：摘要、关键发现、用户观察、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)}"
     )
+
+
+@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),
+    model_name: str | None = Query(default=None, description="Model name used to generate the report"),
+    config: AppConfig = Depends(get_config),
+) -> 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)
+    resolved_model_name = _resolve_report_model_name(config, model_name)
+    cache_key = _report_cache_key(since=since_dt, until=until_dt, limit=limit, model_name=resolved_model_name, settings=settings)
+    cached = _cached_report(cache_key)
+    if cached:
+        return AdminLeaderboardReportResponse(
+            report=cached["report"],
+            generated_at=str(cached.get("generated_at") or ""),
+            cached=True,
+            model_name=str(cached.get("model_name") or resolved_model_name or ""),
+        )
+
+    prompt = await _build_leaderboard_report_prompt(session_factory, settings, since_dt, until_dt, limit)
     try:
-        model = create_chat_model(name=None, thinking_enabled=False)
+        model_cfg = config.get_model_config(resolved_model_name) if resolved_model_name else None
+        thinking_enabled = bool(model_cfg and getattr(model_cfg, "supports_thinking", False))
+        model = create_chat_model(name=resolved_model_name, thinking_enabled=thinking_enabled, app_config=config)
         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。"),
@@ -993,9 +1129,85 @@ async def generate_user_leaderboard_report(
         logger.exception("Failed to generate leaderboard report")
         raise HTTPException(status_code=503, detail=f"Report generation failed: {exc}") from exc
 
+    report = _message_content_to_text(getattr(response, "content", response)).strip()
+    generated_at = _iso(_now())
+    _store_report_cache(cache_key, {"report": report, "generated_at": generated_at, "model_name": resolved_model_name})
     return AdminLeaderboardReportResponse(
-        report=_message_content_to_text(getattr(response, "content", response)).strip(),
-        generated_at=_iso(_now()),
+        report=report,
+        generated_at=generated_at,
+        cached=False,
+        model_name=resolved_model_name,
+    )
+
+
+@router.post("/leaderboard/report/stream")
+async def stream_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),
+    model_name: str | None = Query(default=None, description="Model name used to generate the report"),
+    config: AppConfig = Depends(get_config),
+) -> StreamingResponse:
+    """Stream an LLM-written admin report, returning cached reports when available."""
+    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)
+    resolved_model_name = _resolve_report_model_name(config, model_name)
+    cache_key = _report_cache_key(since=since_dt, until=until_dt, limit=limit, model_name=resolved_model_name, settings=settings)
+
+    async def generate() -> AsyncIterator[str]:
+        cached = _cached_report(cache_key)
+        if cached:
+            yield _sse(
+                "cached",
+                {
+                    "report": cached["report"],
+                    "generated_at": cached.get("generated_at"),
+                    "model_name": cached.get("model_name") or resolved_model_name,
+                },
+            )
+            yield _sse("done", {"cached": True, "generated_at": cached.get("generated_at"), "model_name": cached.get("model_name") or resolved_model_name})
+            return
+
+        report_parts: list[str] = []
+        generated_at = ""
+        try:
+            yield _sse("meta", {"cached": False, "model_name": resolved_model_name})
+            prompt = await _build_leaderboard_report_prompt(session_factory, settings, since_dt, until_dt, limit)
+            model_cfg = config.get_model_config(resolved_model_name) if resolved_model_name else None
+            thinking_enabled = bool(model_cfg and getattr(model_cfg, "supports_thinking", False))
+            model = create_chat_model(name=resolved_model_name, thinking_enabled=thinking_enabled, app_config=config)
+            async for chunk in model.astream(
+                [
+                    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"},
+            ):
+                thinking_delta, text_delta = _extract_chunk_parts(chunk)
+                if thinking_delta:
+                    yield _sse("thinking", {"chunk": thinking_delta})
+                if text_delta:
+                    report_parts.append(text_delta)
+                    yield _sse("text", {"chunk": text_delta})
+            report = "".join(report_parts).strip()
+            generated_at = _iso(_now())
+            _store_report_cache(cache_key, {"report": report, "generated_at": generated_at, "model_name": resolved_model_name})
+            yield _sse("done", {"cached": False, "generated_at": generated_at, "model_name": resolved_model_name, "report": report})
+        except Exception as exc:
+            logger.exception("Failed to stream leaderboard report")
+            yield _sse("error", {"message": str(exc), "generated_at": generated_at, "model_name": resolved_model_name})
+
+    return StreamingResponse(
+        generate(),
+        media_type="text/event-stream",
+        headers={"X-Accel-Buffering": "no", "Cache-Control": "no-cache"},
     )