style: drop redundant comments and apply formatting

Frontend now uses double quotes and semicolons. No behaviour change.

src/books/useGenres.ts

@@ -1,11 +1,13 @@
-import { useEffect, useState } from 'react'
-import { api, errorMessage, type Genre } from '../api'
+import { useEffect, useState } from "react";
+import { api, errorMessage, type Genre } from "../api";
 
 export function useGenres(): { genres: Genre[]; error: string | null } {
-  const [genres, setGenres] = useState<Genre[]>([])
-  const [error, setError] = useState<string | null>(null)
+  const [genres, setGenres] = useState<Genre[]>([]);
+  const [error, setError] = useState<string | null>(null);
   useEffect(() => {
-    api<Genre[]>('GET', '/genres').then(setGenres, (err) => setError(errorMessage(err)))
-  }, [])
-  return { genres, error }
+    api<Genre[]>("GET", "/genres").then(setGenres, (err) =>
+      setError(errorMessage(err)),
+    );
+  }, []);
+  return { genres, error };
 }