tests: add coverage for src/actions/ (15 files) and src/lib/{admin,auth} (3 files)

- src/actions coverage: 2.4% -> 13.55%
- src/lib/admin coverage: 44.3% -> 84.81%
- src/lib/auth coverage: 90.52%
- vitest.config.ts: exclude .next.prev/ from test discovery

src/actions/admin-teams.test.ts

@@ -0,0 +1,51 @@
+import { revalidatePath } from "next/cache";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { requirePermission } from "@/lib/admin/guard";
+import { PERMS } from "@/lib/permissions";
+import { prisma } from "@/lib/prisma";
+import { createTeam, deleteTeam } from "./admin-teams";
+
+vi.mock("@/lib/admin/guard", () => ({ requirePermission: vi.fn() }));
+vi.mock("@/lib/permissions", () => ({ PERMS: { USERS_EDIT: "users.edit" } }));
+vi.mock("@/lib/prisma", () => ({
+	prisma: { websiteTeams: { create: vi.fn(), delete: vi.fn() } },
+}));
+vi.mock("next/cache", () => ({ revalidatePath: vi.fn() }));
+
+const staff = { id: 1, rank: 7, username: "admin" };
+const fakeForm = (data: Record<string, string | null>) => ({
+	get: (key: string) => (key in data ? data[key] : null),
+});
+
+beforeEach(() => {
+	vi.clearAllMocks();
+	vi.mocked(requirePermission).mockResolvedValue(staff as never);
+});
+
+describe("createTeam", () => {
+	it("creates a team entry", async () => {
+		await createTeam(
+			fakeForm({ rankName: "Moderator" }) as unknown as FormData,
+		);
+		expect(prisma.websiteTeams.create).toHaveBeenCalledWith({
+			data: expect.objectContaining({ rankName: "Moderator" }),
+		});
+		expect(revalidatePath).toHaveBeenCalledWith("/admin/teams");
+	});
+
+	it("returns early when rankName is empty", async () => {
+		await createTeam(fakeForm({ rankName: "" }) as unknown as FormData);
+		expect(prisma.websiteTeams.create).not.toHaveBeenCalled();
+	});
+});
+
+describe("deleteTeam", () => {
+	it("deletes a team entry", async () => {
+		vi.mocked(prisma.websiteTeams.delete).mockResolvedValue({} as never);
+		await deleteTeam(fakeForm({ id: "42" }) as unknown as FormData);
+		expect(prisma.websiteTeams.delete).toHaveBeenCalledWith({
+			where: { id: BigInt(42) },
+		});
+		expect(revalidatePath).toHaveBeenCalledWith("/admin/teams");
+	});
+});