feat(frontend): support static website demo mode (#3170)

* feat(frontend): support static website demo mode

* fix(frontend): render html artifact previews from blob content

* chore(frontend): apply pre-commit formatting

* fix(frontend): address static demo PR review comments

* Update the release information of DeerFlow

---------

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

frontend/src/core/models/api.ts

@@ -1,8 +1,18 @@
 import { getBackendBaseURL } from "../config";
+import { isStaticWebsiteOnly } from "../static-mode";
 
 import type { ModelsResponse } from "./types";
 
+const STATIC_MODELS_RESPONSE: ModelsResponse = {
+  models: [],
+  token_usage: { enabled: false },
+};
+
 export async function loadModels(): Promise<ModelsResponse> {
+  if (isStaticWebsiteOnly()) {
+    return STATIC_MODELS_RESPONSE;
+  }
+
   const res = await fetch(`${getBackendBaseURL()}/api/models`);
   const data = (await res.json()) as Partial<ModelsResponse>;
   return {