feat: expand intelligent investigation workspace

src/features/agent/speech-voice-catalog.test.ts

@@ -0,0 +1,18 @@
+import { afterEach, expect, it, vi } from "vitest";
+import { fetchSpeechVoiceCatalog } from "./speech-voice-catalog";
+
+afterEach(() => vi.unstubAllGlobals());
+
+it("preserves a service failure message for a useful retry explanation", async () => {
+  vi.stubGlobal("fetch", vi.fn(async () => new Response(JSON.stringify({ error: "音色列表暂时不可用，请稍后重试" }), { status: 503 })));
+  await expect(fetchSpeechVoiceCatalog("/api/tts/edge/voices")).rejects.toThrow("音色列表暂时不可用，请稍后重试");
+});
+
+it("explains an incompatible cached catalog or an HTML response without exposing parser details", async () => {
+  const fetchMock = vi.fn().mockResolvedValueOnce(new Response(JSON.stringify({ voices: [], defaultVoice: "old" })))
+    .mockResolvedValueOnce(new Response("<!doctype html>"));
+  vi.stubGlobal("fetch", fetchMock);
+  for (let attempt = 0; attempt < 2; attempt += 1) {
+    await expect(fetchSpeechVoiceCatalog("/api/tts/edge/voices")).rejects.toThrow("音色列表格式不匹配，请刷新页面后重试");
+  }
+});