fix: resolve biome lint errors in discovery files

Remove unused functions and imports from route tests, fix array index key
warnings in skeleton components, apply biome formatting.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/routes/discovery.test.ts

@@ -1,6 +1,6 @@
 import { beforeEach, describe, expect, it } from "bun:test";
 import { Hono } from "hono";
-import { globalItems, items, setups, setupItems } from "../../src/db/schema.ts";
+import { globalItems, setups } from "../../src/db/schema.ts";
 import { discoveryRoutes } from "../../src/server/routes/discovery.ts";
 import { createTestDb } from "../helpers/db.ts";
 
@@ -45,26 +45,6 @@ async function insertPublicSetup(
 	return row;
 }
 
-async function insertItem(
-	db: TestDb["db"],
-	userId: number,
-	name: string,
-): Promise<number> {
-	const [row] = await db
-		.insert(items)
-		.values({ name, categoryId: 1, userId })
-		.returning();
-	return row.id;
-}
-
-async function addItemToSetup(
-	db: TestDb["db"],
-	setupId: number,
-	itemId: number,
-) {
-	await db.insert(setupItems).values({ setupId, itemId });
-}
-
 describe("Discovery Routes", () => {
 	let app: Hono;
 	let db: TestDb["db"];