refactor: streamline sales and expenses management in client resource

- Move create/edit logic from relation managers to dedicated resource pages
- Add transaction handling with proper rollback in sale create/update
- Fix expense transaction creation by using correct array access
- Set default client from query parameter in sale/expense forms
- Exclude 'type' field from balance creation to prevent errors

app/Filament/Resources/ExpenseResource/Pages/CreateExpense.php

@@ -28,7 +28,7 @@ class CreateExpense extends CreateRecord
 
     protected function afterCreate(): void
     {
-        $transactions = Arr::only($this->form->getState(), ['transactions']);
+        $transactions = $this->form->getState()['transactions'] ?? [];
 
         try {
             $branch = $this->getRecord()->branch;
@@ -38,7 +38,7 @@ class CreateExpense extends CreateRecord
                 $data = [
                     'branch_id' => $branch->id,
                     'happened_on' => $this->getRecord()->happened_on,
-                    ...Arr::first($transaction),
+                    ...$transaction,
                 ];
 
                 $payload = new CreateTransactionDTO(data: $data, transactionable: $this->getRecord());