fix(patient): consistent debt/paid status, invoice totals, global service search

- patient_debt_rials now = session remaining (final - discount - paid), so the
  card status and invoice status stay consistent with is_paid even after a
  session is edited post-invoicing (no more '0 remaining but تکمیل پرداخت').
- InvoiceSummaryModal: remaining subtracts discount; the فاکتور status reflects
  actual settlement (تسویه شده / بدهکار), and the payments table shows a
  «مجموع پرداختی‌ها» total row.
- Add GET /api/v1/service-items (all owner services) and make the service
  picker searchable across all services without first choosing a section.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/ClinicService/Controller/ClinicServiceController.php

@@ -122,6 +122,20 @@ class ClinicServiceController extends BaseController
 
     // ── Service Items ────────────────────────────────────────────────────────
 
+    /** همه‌ی سرویس‌های owner در همه‌ی بخش‌ها — برای انتخاب/جستجوی سراسری. */
+    #[Route('/api/v1/service-items', methods: ['GET'])]
+    public function listAllItems(#[CurrentUser] User $user): JsonResponse
+    {
+        [$entityType, $entityId] = $this->resolveEntity($user);
+
+        $items = array_map(
+            fn(ServiceItem $i) => $i->toArray(),
+            $this->itemRepo->findByEntity($entityType, $entityId)
+        );
+
+        return $this->success($items);
+    }
+
     #[Route('/api/v1/service-items/{sectionUuid}', methods: ['GET'])]
     public function listItems(string $sectionUuid, #[CurrentUser] User $user): JsonResponse
     {