feat: add withdraw request functionality and UI components

app/Services/Invoice/InvoiceService.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace App\Services\Invoice;
+
+use App\Enums\DocumentModalityEnum;
+use App\Enums\DocumentStatusEnum;
+use App\Enums\InvoicePaymentMethodEnum;
+use App\Enums\InvoiceStatusEnum;
+use App\Models\Document;
+use App\Models\Invoice;
+
+class InvoiceService
+{
+    public function createForDocument(Document $document): Invoice
+    {
+        $invoice = Invoice::create([
+            'number' => 'pending',
+            'amount' => DocumentModalityEnum::from($document->modality)->price(),
+            'status' => InvoiceStatusEnum::Pending->value,
+            'document_id' => $document->id,
+            'user_id' => $document->requester_id,
+        ]);
+
+        $invoice->update(['number' => str_pad((string) $invoice->id, 5, '0', STR_PAD_LEFT)]);
+
+        return $invoice;
+    }
+
+    public function markPaid(Invoice $invoice, InvoicePaymentMethodEnum $method): Invoice
+    {
+        $invoice->update([
+            'status' => InvoiceStatusEnum::Paid->value,
+            'payment_method' => $method->value,
+            'paid_at' => now(),
+        ]);
+
+        $document = $invoice->document;
+
+        if ($document && $document->status === DocumentStatusEnum::Registered) {
+            $document->update([
+                'status' => DocumentStatusEnum::InProgress->value,
+                'processing_deadline' => now()->addHours($document->priority->processingHours()),
+            ]);
+        }
+
+        return $invoice;
+    }
+}