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/ui/Button.tsx

@@ -1,55 +0,0 @@
-import { ButtonHTMLAttributes, ReactNode } from 'react'
-import { clsx } from 'clsx'
-
-interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
-  variant?: 'primary' | 'secondary' | 'danger' | 'ghost'
-  size?: 'sm' | 'md' | 'lg'
-  isLoading?: boolean
-  children: ReactNode
-}
-
-export function Button({
-  variant = 'primary',
-  size = 'md',
-  isLoading = false,
-  className,
-  children,
-  disabled,
-  ...props
-}: ButtonProps) {
-  const baseStyles = 'inline-flex items-center justify-center rounded-lg font-medium transition-colors focus:outline-none focus:ring-2 focus:ring-offset-2 disabled:opacity-50 disabled:cursor-not-allowed'
-
-  const variants = {
-    primary: 'bg-blue-600 text-white hover:bg-blue-700 focus:ring-blue-500',
-    secondary: 'bg-gray-700 text-white hover:bg-gray-600 focus:ring-gray-500',
-    danger: 'bg-red-600 text-white hover:bg-red-700 focus:ring-red-500',
-    ghost: 'text-gray-400 hover:text-white hover:bg-gray-800 focus:ring-gray-500',
-  }
-
-  const sizes = {
-    sm: 'px-3 py-1.5 text-sm',
-    md: 'px-4 py-2 text-sm',
-    lg: 'px-6 py-3 text-base',
-  }
-
-  return (
-    <button
-      className={clsx(
-        baseStyles,
-        variants[variant],
-        sizes[size],
-        className
-      )}
-      disabled={disabled || isLoading}
-      {...props}
-    >
-      {isLoading && (
-        <svg className="animate-spin -ml-1 mr-2 h-4 w-4 text-current" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
-          <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4"></circle>
-          <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
-        </svg>
-      )}
-      {children}
-    </button>
-  )
-}