chore: finish frontend ESLint migration #18

Enable every plugin recommended preset and replace Biome with ESLint formatting.

Preserve API contracts and JSX whitespace; verify source, tests, builds and tooling.

scripts/check-release.cjs

@@ -1,14 +1,16 @@
 const assert = require("node:assert/strict");
 const { execFileSync } = require("node:child_process");
+
 const { version } = require("../package.json");
-const git = (...args) => execFileSync("git", args, { encoding: "utf8" }).trim();
+// eslint-disable-next-line sonarjs/no-os-command-from-path -- Repository checks use the developer/CI Git installation; arguments never invoke a shell.
+const git = (...arguments_) => execFileSync("git", arguments_, { encoding: "utf8" }).trim();
 
 assert.equal(
 	git("status", "--porcelain"),
 	"",
 	"Commit all changes before preparing a release",
 );
-const tags = git(
+const tag_ = git(
 	"tag",
 	"--merged",
 	"HEAD",
@@ -17,9 +19,9 @@ const tags = git(
 	"--sort=-version:refname",
 )
 	.split("\n")
-	.filter((tag) => /^v\d+\.\d+\.\d+$/.test(tag));
+	.find(tag => /^v\d+\.\d+\.\d+$/.test(tag));
 assert.equal(
 	version,
-	tags[0]?.slice(1) ?? "0.0.0",
+	tag_?.slice(1) ?? "0.0.0",
 	"Version is already prepared or release tags are missing. Fetch tags; finish the existing release before preparing another.",
 );