test(server): isolate route modules in endpoint tests

server/src/__tests__/health.test.ts

@@ -2,13 +2,11 @@ import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
 import express from "express";
 import request from "supertest";
 import type { Db } from "@paperclipai/db";
-import { healthRoutes } from "../routes/health.js";
-import * as devServerStatus from "../dev-server-status.js";
 import { serverVersion } from "../version.js";
 
 describe("GET /health", () => {
   beforeEach(() => {
-    vi.spyOn(devServerStatus, "readPersistedDevServerStatus").mockReturnValue(undefined);
+    vi.resetModules();
   });
 
   afterEach(() => {
@@ -16,6 +14,9 @@ describe("GET /health", () => {
   });
 
   it("returns 200 with status ok", async () => {
+    const devServerStatus = await import("../dev-server-status.js");
+    vi.spyOn(devServerStatus, "readPersistedDevServerStatus").mockReturnValue(undefined);
+    const { healthRoutes } = await import("../routes/health.js");
     const app = express();
     app.use("/health", healthRoutes());
 
@@ -25,6 +26,9 @@ describe("GET /health", () => {
   });
 
   it("returns 200 when the database probe succeeds", async () => {
+    const devServerStatus = await import("../dev-server-status.js");
+    vi.spyOn(devServerStatus, "readPersistedDevServerStatus").mockReturnValue(undefined);
+    const { healthRoutes } = await import("../routes/health.js");
     const db = {
       execute: vi.fn().mockResolvedValue([{ "?column?": 1 }]),
     } as unknown as Db;
@@ -38,6 +42,9 @@ describe("GET /health", () => {
   });
 
   it("returns 503 when the database probe fails", async () => {
+    const devServerStatus = await import("../dev-server-status.js");
+    vi.spyOn(devServerStatus, "readPersistedDevServerStatus").mockReturnValue(undefined);
+    const { healthRoutes } = await import("../routes/health.js");
     const db = {
       execute: vi.fn().mockRejectedValue(new Error("connect ECONNREFUSED")),
     } as unknown as Db;