feat: add organization onboarding flow and auth enforcement

components/ui/Button.tsx

@@ -0,0 +1,37 @@
+import React from 'react';
+
+export interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
+  variant?: 'primary' | 'secondary' | 'ghost';
+  isLoading?: boolean;
+}
+
+export const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className = '', variant = 'primary', isLoading, children, disabled, ...props }, ref) => {
+    const baseStyles = 'inline-flex items-center justify-center rounded-xl text-sm font-medium px-5 py-2.5 transition-all duration-200 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 shadow-sm hover:bg-blue-700 focus:ring-blue-500',
+      secondary: 'bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 text-neutral-900 dark:text-white hover:bg-neutral-50 dark:hover:bg-neutral-800 shadow-sm focus:ring-neutral-200',
+      ghost: 'text-neutral-600 dark:text-neutral-400 hover:text-neutral-900 dark:hover:text-white hover:bg-neutral-100 dark:hover:bg-neutral-800 focus:ring-neutral-200',
+    };
+
+    return (
+      <button
+        ref={ref}
+        className={`${baseStyles} ${variants[variant]} ${className}`}
+        disabled={disabled || isLoading}
+        {...props}
+      >
+        {isLoading && (
+          <svg className="w-4 h-4 mr-2 animate-spin" fill="none" viewBox="0 0 24 24">
+            <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
+            <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" />
+          </svg>
+        )}
+        {children}
+      </button>
+    );
+  }
+);
+
+Button.displayName = 'Button';