Fix training plan generation flow

server/features.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, it, vi, beforeEach } from "vitest";
 import { appRouter } from "./routers";
 import { COOKIE_NAME } from "../shared/const";
 import type { TrpcContext } from "./_core/context";
+import * as db from "./db";
 
 type AuthenticatedUser = NonNullable<TrpcContext["user"]>;
 
@@ -209,6 +210,17 @@ describe("plan.active", () => {
     const caller = appRouter.createCaller(ctx);
     await expect(caller.plan.active()).rejects.toThrow();
   });
+
+  it("returns null when the user has no active plan", async () => {
+    const user = createTestUser();
+    const { ctx } = createMockContext(user);
+    const caller = appRouter.createCaller(ctx);
+    const getActivePlanSpy = vi.spyOn(db, "getActivePlan").mockResolvedValueOnce(null);
+
+    await expect(caller.plan.active()).resolves.toBeNull();
+
+    getActivePlanSpy.mockRestore();
+  });
 });
 
 describe("plan.adjust input validation", () => {