fix: update the logic for remove model in provider

tests/unit/disabled-models-enforcement.test.js

@@ -1,8 +1,10 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
 
 const getDisabledModels = vi.fn();
+const getDeletedModels = vi.fn();
 
 vi.mock("@/lib/disabledModelsDb", () => ({ getDisabledModels }));
+vi.mock("@/lib/db", () => ({ getDeletedModels }));
 vi.mock("@/shared/constants/providers", () => ({
   getProviderAlias: (provider) => ({ openai: "oa", claude: "claude" })[provider] || provider,
 }));
@@ -12,6 +14,8 @@ const { getDisabledModelResponse } = await import("../../src/sse/services/disabl
 describe("getDisabledModelResponse", () => {
   beforeEach(() => {
     getDisabledModels.mockReset();
+    getDeletedModels.mockReset();
+    getDeletedModels.mockResolvedValue({});
   });
 
   it("allows an enabled model", async () => {
@@ -56,6 +60,21 @@ describe("getDisabledModelResponse", () => {
     });
   });
 
+  it("blocks a permanently deleted model", async () => {
+    getDisabledModels.mockResolvedValue({});
+    getDeletedModels.mockResolvedValue({ oa: ["gpt-deleted"] });
+
+    const response = await getDisabledModelResponse("openai", "gpt-deleted");
+
+    expect(response.status).toBe(404);
+    await expect(response.json()).resolves.toMatchObject({
+      error: {
+        code: "model_not_found",
+        message: "Model openai/gpt-deleted has been deleted by an administrator",
+      },
+    });
+  });
+
   it("fails closed when disabled-model storage cannot be read", async () => {
     getDisabledModels.mockRejectedValue(new Error("database unavailable"));