feat: polish invoice editor and viewer UI with custom NumberInput

component

- Create custom NumberInput component with increment/decrement buttons
- Add 0.25 step increments for hours and rates in invoice forms
- Implement emerald-themed styling with hover states and accessibility
- Add keyboard navigation (arrow keys) and proper ARIA support
- Condense invoice editor tax/totals section into efficient grid layout
- Update client dropdown to single-line format (name + email)
- Add fixed footer with floating action bar pattern matching business
  forms
- Redesign invoice viewer with better space utilization and visual
  hierarchy
- Maintain professional appearance and consistent design system
- Fix Next.js 15 params Promise handling across all invoice pages
- Resolve TypeScript compilation errors and type-only imports

src/app/dashboard/businesses/[id]/edit/page.tsx

@@ -1,11 +1,24 @@
 "use client";
 
-import { BusinessForm } from "~/components/business-form";
+import Link from "next/link";
 import { useParams } from "next/navigation";
+import { BusinessForm } from "~/components/business-form";
+import { PageHeader } from "~/components/page-header";
 
 export default function EditBusinessPage() {
   const params = useParams();
   const businessId = Array.isArray(params?.id) ? params.id[0] : params?.id;
   if (!businessId) return null;
-  return <BusinessForm businessId={businessId} mode="edit" />;
-} 
+
+  return (
+    <div>
+      <PageHeader
+        title="Edit Business"
+        description="Update business information below."
+        variant="gradient"
+      />
+
+      <BusinessForm businessId={businessId} mode="edit" />
+    </div>
+  );
+}