feat: add administration page and account role management

- Implemented `AdministrationContent` component for managing account roles.
- Created `AdministrationPage` to serve as the main entry point for administration tasks.
- Added PDF preview functionality with `PdfPreviewFrame` component for invoice generation.
- Introduced `InputColor` component for advanced color selection with various formats.
- Established color conversion utilities in `color-converter.ts` for handling color formats.
- Defined appearance-related schemas and types in `appearance.ts` for consistent theme management.

src/app/dashboard/invoices/[id]/page.tsx

@@ -75,7 +75,7 @@ function InvoiceViewContent({ invoiceId }: { invoiceId: string }) {
   const handleMarkAsPaid = () => {
     updateStatus.mutate({
       id: invoiceId,
-      status: "paid" as StoredInvoiceStatus,
+      status: "paid",
     });
   };
 
@@ -109,17 +109,15 @@ function InvoiceViewContent({ invoiceId }: { invoiceId: string }) {
   const subtotal = invoice.items.reduce((sum, item) => sum + item.amount, 0);
   const taxAmount = (subtotal * invoice.taxRate) / 100;
   const total = subtotal + taxAmount;
+  const storedStatus = invoice.status as StoredInvoiceStatus;
   const effectiveStatus = getEffectiveInvoiceStatus(
-    invoice.status as StoredInvoiceStatus,
-    invoice.dueDate,
-  );
-  const isOverdue = isInvoiceOverdue(
-    invoice.status as StoredInvoiceStatus,
+    storedStatus,
     invoice.dueDate,
   );
+  const isOverdue = isInvoiceOverdue(storedStatus, invoice.dueDate);
 
   const getStatusType = (): StatusType => {
-    return effectiveStatus as StatusType;
+    return effectiveStatus;
   };
 
   return (