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/lib/auth/personal-token-scope.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from "vitest";
+import {
+	personalTokenScope,
+	USER_TOKENABLE_TYPE,
+} from "./personal-token-scope";
+
+describe("personal-token-scope", () => {
+	it("exports USER_TOKENABLE_TYPE constant", () => {
+		expect(USER_TOKENABLE_TYPE).toBe("App\\Models\\User");
+	});
+
+	it("returns correct scope with BigInt", () => {
+		const r = personalTokenScope(42);
+		expect(r.tokenableId).toBe(BigInt(42));
+		expect(r.tokenableType).toBe("App\\Models\\User");
+	});
+});