fix: sync llmwiki embed theme

frontend-web/src/strategy-components/components/resource-management/llmwiki/WeKnoraKnowledgeDetailPage.tsx

@@ -28,7 +28,7 @@ function cssVar(name: string, fallback = ""): string {
 function collectThemePayload(): DeerFlowThemePayload {
   const isDark =
     document.documentElement.classList.contains("dark") ||
-    document.documentElement.dataset.theme === "dark";
+    document.documentElement.getAttribute("theme-mode") === "dark";
   return {
     type: "deerflow-weknora-theme",
     theme: isDark ? "dark" : "light",
@@ -91,7 +91,9 @@ export function WeKnoraKnowledgeDetailPage() {
         const path = session.frame_path.startsWith("/")
           ? session.frame_path
           : `/${session.frame_path}`;
-        setFrameSrc(`${base}${path}`);
+        const nextUrl = new URL(`${base}${path}`);
+        nextUrl.searchParams.set("theme", collectThemePayload().theme);
+        setFrameSrc(nextUrl.toString());
       })
       .catch((error: unknown) => {
         if (cancelled) return;
@@ -112,7 +114,7 @@ export function WeKnoraKnowledgeDetailPage() {
     const observer = new MutationObserver(send);
     observer.observe(document.documentElement, {
       attributes: true,
-      attributeFilter: ["class", "style", "data-theme"],
+      attributeFilter: ["class", "style", "data-theme", "theme-mode"],
     });
     window.addEventListener("storage", send);
     return () => {