Enable more biome lints and fix things

packages/tui/test/image-test.ts

@@ -14,7 +14,7 @@ console.log("Loading image from:", testImagePath);
 let imageBuffer: Buffer;
 try {
 	imageBuffer = readFileSync(testImagePath);
-} catch (e) {
+} catch (_e) {
 	console.error(`Failed to load image: ${testImagePath}`);
 	console.error("Usage: npx tsx test/image-test.ts [path-to-image.png]");
 	process.exit(1);

packages/tui/test/truncated-text.test.ts

@@ -49,7 +49,7 @@ describe("TruncatedText component", () => {
 	});
 
 	it("preserves ANSI codes in output and pads correctly", () => {
-		const styledText = chalk.red("Hello") + " " + chalk.blue("world");
+		const styledText = `${chalk.red("Hello")} ${chalk.blue("world")}`;
 		const text = new TruncatedText(styledText, 1, 0);
 		const lines = text.render(40);