Remove Settings and Setup pages along with their tests and related API services

- Deleted Settings.tsx and Setup.tsx pages, which included functionality for changing passwords and setting up an admin account.
- Removed associated test files for Setup page.
- Eliminated API service definitions related to proxy hosts, remote servers, import functionality, and health checks.
- Cleaned up mock data and test setup files.
- Removed configuration files for TypeScript, Vite, and Tailwind CSS.
- Deleted scripts for testing coverage, release management, Dockerfile validation, and Python compilation checks.
- Removed Sourcery pre-commit wrapper script.

frontend/src/components/ImportBanner.tsx

@@ -1,30 +0,0 @@
-interface Props {
-  session: { id: string }
-  onReview: () => void
-  onCancel: () => void
-}
-
-export default function ImportBanner({ session, onReview, onCancel }: Props) {
-  return (
-    <div className="bg-yellow-900/20 border border-yellow-600 text-yellow-300 px-4 py-3 rounded mb-6 flex items-center justify-between">
-      <div>
-        <div className="font-medium">Pending Import Session</div>
-        <div className="text-sm text-yellow-400/80">Session ID: {session.id}</div>
-      </div>
-      <div className="flex gap-3">
-        <button
-          onClick={onReview}
-          className="px-3 py-1 bg-yellow-600 hover:bg-yellow-500 text-black rounded text-sm font-medium"
-        >
-          Review Changes
-        </button>
-        <button
-          onClick={onCancel}
-          className="px-3 py-1 bg-gray-800 hover:bg-gray-700 text-yellow-300 border border-yellow-700 rounded text-sm font-medium"
-        >
-          Cancel
-        </button>
-      </div>
-    </div>
-  )
-}