feat(frontend): break out the sidebar into a reusable component + use it for admin page

[ntindle]

We need a sidebar for the admin page, might as well reuse the reusable component to do so!

Changes 🏗️

• Extracts the agptui sidebar to a more reusable component
• Update the usage of that sidebar in the settings page
• Use that same sidebar for the admin page

Checklist 📋

For code changes:

• I have clearly listed my changes in the PR description
• I have made a test plan
• I have tested my changes according to the test plan:
  • Test the old sidebar
  • Test the new sidebar for admin

[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Unused Import The ShoppingBag icon is imported in the admin layout file but not used anywhere in the component. import Link from "next/link"; Potential Bug The key for the Link components uses both href and index which could cause issues if the same href appears multiple times in different link groups. Consider using a more unique key. <Link key={`${link.href}-${index}`} href={link.href} className="inline-flex w-full items-center gap-2.5 rounded-xl px-3 py-3 text-neutral-800 hover:bg-neutral-800 hover:text-white dark:text-neutral-200 dark:hover:bg-neutral-700 dark:hover:text-white" Unused Import The LogOut icon is imported but not used anywhere in the component. import { Users, DollarSign, LogOut } from 'lucide-react';

[deepsource-io]

Here's the code health analysis summary for commits fefd48a..a5c2f0a. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
JavaScript	✅ Success	❗ 4 occurences introduced 🎯 5 occurences resolved	View Check ↗
Python	✅ Success		View Check ↗

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