chore: fix lint errors — auto-format, isNaN, unused imports, button type

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/server/middleware/auth.ts

@@ -1,5 +1,5 @@
-import type { Context, Next } from "hono";
 import { eq } from "drizzle-orm";
+import type { Context, Next } from "hono";
 import { users } from "../../db/schema.ts";
 import { getOrCreateUser, verifyApiKey } from "../services/auth.service";
 import { getOrCreateUncategorized } from "../services/category.service";