fix(chat): distinguish auth outages from model failures

Runtime model checks previously mapped every authenticated endpoint failure to models_unavailable. Treat request failures as service outages and retry failed checks after five seconds; empty model configurations remain distinct.

src/components/chat/GlobalChatbox.test.tsx

@@ -6,6 +6,7 @@ import { GlobalChatbox } from "./GlobalChatbox";
 
 const createSession = jest.fn();
 const mockFetchAgentRuntimeHealth = jest.fn();
+const mockFetchAgentModels = jest.fn();
 let mockCurrentProjectId = "project-1";
 
 jest.mock("@refinedev/core", () => ({
@@ -13,7 +14,7 @@ jest.mock("@refinedev/core", () => ({
 }));
 
 jest.mock("@/lib/chatModels", () => ({
-  fetchAgentModels: jest.fn(() => new Promise(() => {})),
+  fetchAgentModels: (...args: unknown[]) => mockFetchAgentModels(...args),
 }));
 
 jest.mock("@/lib/agentRuntime", () => ({
@@ -100,12 +101,15 @@ describe("GlobalChatbox lifecycle", () => {
     createSession.mockClear();
     mockFetchAgentRuntimeHealth.mockReset();
     mockFetchAgentRuntimeHealth.mockImplementation(() => new Promise(() => {}));
+    mockFetchAgentModels.mockReset();
+    mockFetchAgentModels.mockImplementation(() => new Promise(() => {}));
     mockCurrentProjectId = "project-1";
   });
 
   afterEach(() => {
     jest.runOnlyPendingTimers();
     jest.useRealTimers();
+    jest.restoreAllMocks();
   });
 
   it("keeps content mounted and preserves the session across close and reopen", async () => {
@@ -146,4 +150,45 @@ describe("GlobalChatbox lifecycle", () => {
 
     expect(screen.getByText("Workspace state: unavailable")).toBeInTheDocument();
   });
+
+  it("reserves models unavailable for an empty model configuration", async () => {
+    mockFetchAgentRuntimeHealth.mockResolvedValueOnce(true);
+    mockFetchAgentModels.mockResolvedValueOnce({ models: [] });
+    render(<GlobalChatbox open onClose={jest.fn()} />);
+
+    await act(async () => {
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+
+    expect(screen.getByText("Workspace state: models_unavailable")).toBeInTheDocument();
+  });
+
+  it("reports an auth dependency failure as unavailable and retries quickly", async () => {
+    jest.spyOn(console, "error").mockImplementation(() => undefined);
+    mockFetchAgentRuntimeHealth.mockResolvedValue(true);
+    mockFetchAgentModels
+      .mockRejectedValueOnce(new Error("authentication service unavailable"))
+      .mockResolvedValueOnce({
+        defaultModel: "provider/model",
+        models: [{ id: "provider/model", label: "Model" }],
+      });
+
+    render(<GlobalChatbox open onClose={jest.fn()} />);
+
+    await act(async () => {
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(screen.getByText("Workspace state: unavailable")).toBeInTheDocument();
+    expect(mockFetchAgentModels).toHaveBeenCalledTimes(1);
+
+    await act(async () => {
+      jest.advanceTimersByTime(5_000);
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(screen.getByText("Workspace state: ready")).toBeInTheDocument();
+    expect(mockFetchAgentModels).toHaveBeenCalledTimes(2);
+  });
 });