diff --git a/packages/core/src/ai/llm-provider.ts b/packages/core/src/ai/llm-provider.ts
index f1b0e5b8..01cbbf9f 100644
--- a/packages/core/src/ai/llm-provider.ts
+++ b/packages/core/src/ai/llm-provider.ts
@@ -230,6 +230,10 @@ export async function createChatModelFromEndpoint(
   const temperature = options.temperature ?? 0.7;
   const maxTokens = options.maxTokens ?? 4096;
   const streaming = options.streaming ?? true;
+  // 3，AI提问，如果是 Ollama 且桌面端（Tauri 环境），替换 _streamingFetch 为原生 fetch
+  if (endpoint.provider === "ollama" && typeof window !== "undefined" && "__TAURI_INTERNALS__" in window) {
+    setStreamingFetch(globalThis.fetch);
+  }
   const endpointFetch = getEndpointFetch(endpoint, model);
 
   switch (endpoint.provider) {
diff --git a/packages/core/src/ai/test-endpoint.ts b/packages/core/src/ai/test-endpoint.ts
index 96ceddbb..ecca29c2 100644
--- a/packages/core/src/ai/test-endpoint.ts
+++ b/packages/core/src/ai/test-endpoint.ts
@@ -1,7 +1,7 @@
 import type { AIEndpoint } from "../types";
 import { getDefaultBaseUrl, providerRequiresApiKey } from "../utils";
 import { logAIEndpointDebug, summarizeDebugText } from "./request-debug";
-import { getEndpointFetch } from "./llm-provider";
+import { getEndpointFetch, setStreamingFetch } from "./llm-provider";
 import {
   buildOpenAICompatibleUrl,
   buildProviderModelsUrl,
@@ -242,6 +242,10 @@ async function listOllamaModels(endpoint: AIEndpoint): Promise<string[]> {
     endpoint.apiKey,
     endpoint.useExactRequestUrl,
   );
+  // 1, 未获取模型列表，如果是 Ollama 且桌面端（Tauri 环境），替换 _streamingFetch 为原生 fetch
+  if (endpoint.provider === "ollama" && typeof window !== "undefined" && "__TAURI_INTERNALS__" in window) {
+    setStreamingFetch(globalThis.fetch);
+  }
   const data = await fetchJson(requestUrl, undefined, {
     endpoint,
     action: "list-models",
@@ -458,6 +462,10 @@ export async function testAIEndpoint(
     case "ollama":
       // Pre-check: verify the Ollama server is reachable before running the full test
       try {
+        // 2, 已获取模型列表，如果是 Ollama 且桌面端（Tauri 环境），替换 _streamingFetch 为原生 fetch
+        if (endpoint.provider === "ollama" && typeof window !== "undefined" && "__TAURI_INTERNALS__" in window) {
+          setStreamingFetch(globalThis.fetch);
+        }
         const tagsUrl = buildProviderModelsUrl("ollama", endpoint.baseUrl, endpoint.apiKey, endpoint.useExactRequestUrl);
         await fetchJson(tagsUrl, undefined, { endpoint, action: "ollama-ping" });
       } catch (pingErr) {