Make the test gate fail when no tests match

vitest.config.ts set passWithNoTests: true, added in the 7dd4abb
scaffolding commit when the repo genuinely had no tests yet. Once tests
existed it became the same hazard as the oxlint bugs fixed in 91f46ff:
if the include globs ever stopped matching, the suite would exit 0
having run nothing.

Vitest already defaults to failing in that case, so removing the line is
the whole fix — a broken glob now reports "No test files found, exiting
with code 1". Verified by pointing the globs at a nonexistent directory.

Extends the gate check to flag the option coming back, and renames it
from check-lint-gate to check-gates now that it covers more than oxlint.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

packages/domain/src/__tests__/gates.test.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from "vitest";
+import { checkGates } from "../../../../scripts/check-gates.mjs";
+
+describe("quality gates", () => {
+	it("fail on violations instead of silently passing", () => {
+		const violations = checkGates();
+		if (violations.length > 0) {
+			throw new Error(
+				`Gate integrity violations:\n  ${violations.join("\n  ")}`,
+			);
+		}
+		expect(violations).toHaveLength(0);
+	});
+});

packages/domain/src/__tests__/lint-gate.test.ts

@@ -1,14 +0,0 @@
-import { describe, expect, it } from "vitest";
-import { checkLintGate } from "../../../../scripts/check-lint-gate.mjs";
-
-describe("lint gate", () => {
-	it("fails on warnings instead of silently passing", () => {
-		const violations = checkLintGate();
-		if (violations.length > 0) {
-			throw new Error(
-				`Lint gate integrity violations:\n  ${violations.join("\n  ")}`,
-			);
-		}
-		expect(violations).toHaveLength(0);
-	});
-});