feat: refactor names

frontend/src/app/keroma/KeromaPage.tsx

@@ -0,0 +1,20 @@
+/**
+ * Keroma page. Rendered at /keroma.
+ */
+
+import React from 'react'
+
+export function KeromaPage() {
+  return (
+    <div className="relative flex flex-1 flex-col min-h-0 p-4">
+      <div className="flex flex-wrap items-center gap-3">
+        <h1 className="p-3 scroll-m-20 text-4xl font-extrabold tracking-tight text-balance">
+          Keroma
+        </h1>
+      </div>
+      <div className="rounded-lg border bg-card p-4 text-card-foreground shadow-sm">
+        <p className="text-muted-foreground">Welcome to Keroma.</p>
+      </div>
+    </div>
+  )
+}