feat: 知识库实体筛选、技能白名单收紧、嵌入主题与提问组件优化

- 知识库笔记列表支持按实体精确筛选（路由/服务/仓储层透传，关系图索引查询）
- 自定义智能体技能白名单在 skill_view 与 skill_manage 的 list/view 别名上同样生效；
  config 未声明 skills 时视为无可见技能
- 嵌入圆桌主题解析默认深蓝，强制主题期间不再写 localStorage 覆盖主站选择
- 智能体提问建议拆出 agent-question-chips 组件，编辑器与详情面板联动优化
- 新增 qa-client 问答测试脚本

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend-web/src/App.tsx

@@ -9,6 +9,11 @@ import { I18nProvider } from "@/core/i18n/context";
 import { detectLocale } from "@/core/i18n/locale";
 import { ChatProvider } from "@/contexts/ChatContext";
 import { ThemeProvider } from "@/contexts/ThemeContext";
+import {
+  resolveEmbedRoundtableTheme,
+  resolveEmbedTheme,
+} from "@/core/embed/params";
+import { readWujieProps } from "@/core/embed/wujie";
 
 import { HashRouter, useLocation } from "react-router-dom";
 
@@ -29,7 +34,26 @@ import { NotFoundPage } from "./pages/NotFoundPage";
 function AppProviders({ children }: { children: React.ReactNode }) {
   const locale = useMemo(() => detectLocale(), []);
   const location = useLocation();
-  const forcedTheme = location.pathname === "/landing" ? "light" : undefined;
+  // 嵌入路由的主题用 forcedTheme 强制：只影响当前渲染，不写 localStorage。
+  // 千万不要在嵌入页里调 ThemeContext.setTheme —— 它会持久化主题并打上
+  // 「用户已显式选择」标记。无界子应用与主站同域共享 localStorage，宿主
+  // 注入的 theme 会就此覆盖用户在主站自己选的主题（且每次打开宿主都覆盖）。
+  const forcedTheme = useMemo(() => {
+    if (location.pathname === "/landing") return "light";
+    if (location.pathname === "/embed/roundtable") {
+      const wp = readWujieProps();
+      const raw =
+        (typeof wp.theme === "string" && wp.theme.trim()) ||
+        new URLSearchParams(location.search).get("theme")?.trim() ||
+        "dark";
+      return resolveEmbedRoundtableTheme(raw);
+    }
+    if (location.pathname.startsWith("/embed/chats")) {
+      const raw = new URLSearchParams(location.search).get("theme")?.trim();
+      return raw ? resolveEmbedTheme(raw) : undefined;
+    }
+    return undefined;
+  }, [location.pathname, location.search]);
 
   return (
     <NextThemesProvider