feat: complete platform management features and enhance SEO

- Add comprehensive company management interface with editing, suspension
- Implement user invitation system within companies
- Add Add Company modal with form validation
- Create platform auth configuration in separate lib file
- Add comprehensive SEO metadata with OpenGraph and structured data
- Fix auth imports and route exports for Next.js 15 compatibility
- Add toast notifications with RadixUI components
- Update TODO status to reflect 100% completion of platform features

components/ui/textarea.tsx

@@ -0,0 +1,23 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+export type TextareaProps = React.TextareaHTMLAttributes<HTMLTextAreaElement>
+
+const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
+  ({ className, ...props }, ref) => {
+    return (
+      <textarea
+        className={cn(
+          "flex min-h-[80px] w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Textarea.displayName = "Textarea"
+
+export { Textarea }