fix(lint): resolve biome formatting and unused variables across codebase

scripts/sync-translations.mjs

@@ -7,8 +7,16 @@ const enData = JSON.parse(fs.readFileSync(enPath, "utf8"));
 
 function deepMerge(target, source) {
 	for (const key of Object.keys(source)) {
-		if (source[key] && typeof source[key] === "object" && !Array.isArray(source[key])) {
-			if (!target[key] || typeof target[key] !== "object" || Array.isArray(target[key])) {
+		if (
+			source[key] &&
+			typeof source[key] === "object" &&
+			!Array.isArray(source[key])
+		) {
+			if (
+				!target[key] ||
+				typeof target[key] !== "object" ||
+				Array.isArray(target[key])
+			) {
 				target[key] = {};
 			}
 			deepMerge(target[key], source[key]);
@@ -21,14 +29,16 @@ function deepMerge(target, source) {
 	return target;
 }
 
-const files = fs.readdirSync(messagesDir).filter((f) => f.endsWith(".json") && f !== "en.json");
+const files = fs
+	.readdirSync(messagesDir)
+	.filter((f) => f.endsWith(".json") && f !== "en.json");
 
 for (const file of files) {
 	const filePath = path.join(messagesDir, file);
 	try {
 		const data = JSON.parse(fs.readFileSync(filePath, "utf8"));
 		deepMerge(data, enData);
-		fs.writeFileSync(filePath, JSON.stringify(data, null, 2) + "\n", "utf8");
+		fs.writeFileSync(filePath, `${JSON.stringify(data, null, 2)}\n`, "utf8");
 		console.log(`Synced ${file}`);
 	} catch (err) {
 		console.error(`Error syncing ${file}:`, err);