chore: update lint rules

web/eslint-plugins/__tests__/helpers.ts

@@ -9,6 +9,7 @@
 //     `verifyInFixtures` runs a rule with cwd fixed to `__fixtures__/`, so both
 //     work without touching process.cwd() or the real src/ tree.
 import { Linter } from "eslint";
+import type { Rule } from "eslint";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
 
@@ -32,3 +33,18 @@ export function verifyInFixtures(
 	const linter = new Linter({ configType: "flat", cwd: FIXTURES_DIR });
 	return linter.verify(code, config, path.join(FIXTURES_SRC, relFile));
 }
+
+/** Wrap a script body into a minimal Svelte component (runs in runes mode). */
+export function svelteComponent(script: string): string {
+	return `<main>Hello</main>\n\n<script lang="ts">\n${script}\n</script>\n`;
+}
+
+/**
+ * Narrow an inferred JS rule to the typed `Rule.RuleModule`. The plugin rule
+ * files are plain JS, so TypeScript infers a widened shape (`meta.type: string`)
+ * that `RuleTester.run` rejects; the shape is structurally correct at runtime,
+ * which is why existing rules keep their JS inference and only the tests cast.
+ */
+export function asRuleModule(rule: unknown): Rule.RuleModule {
+	return rule as Rule.RuleModule;
+}