feat: enhance inner pages header with back button functionality and emit event on back click

fix: update total price info handling in correction form and ensure accurate calculations

refactor: streamline sale invoice single view component by extracting info card into a separate component

style: adjust button sizes in payment forms for better UI consistency

feat: implement season picker navigation controls to prevent out-of-bounds selection

fix: improve price formatting utility to handle undefined values gracefully

chore: update environment configuration for API base URL

feat: add navigation service to manage routing history and back navigation

src/app/modules/saleInvoices/views/single.component.html

@@ -1,3 +1,9 @@
 <div class="min-h-dvh p-4">
-  <shared-sale-invoice-single-view [loading]="loading()" [invoice]="invoice()" />
+  <p-card class="mb-4">
+    <div class="flex items-center justify-between">
+      <span class="text-lg font-bold">صورت‌حساب شماره {{ invoice()?.invoice_number }}</span>
+      <button pButton type="button" icon="pi pi-share-alt" outlined (onClick)="share()"></button>
+    </div>
+  </p-card>
+  <shared-sale-invoice-single-info-card [loading]="loading()" [invoice]="invoice()" />
 </div>