feat(billing): patient payments list + patient invoices detail (doctor/clinic)

Port two nobat724 Figma screens into the admin SPA for the doctor/clinic
tenant panel:

- node 1 — لیست پرداخت‌ها (/admin/my-payments): per-patient payment summary
  (invoice count, paid, remaining, derived status paid/unsettled/unpaid),
  filters by national code / status / Jalali date range, pagination.
- node 2 — پرداخت‌های ثبت‌شده (/admin/my-payments/:patientUuid): a patient's
  recorded invoices with patient header, service title, total, status badge,
  and an expandable per-invoice item breakdown.

Backend (App\Billing):
- InvoiceRepository::patientPaymentSummary/countPatientPaymentSummary — DQL
  aggregation grouped by patient record (arbitrary join Invoice→PatientRecord
  →User), draft/void excluded, derived-status HAVING filters.
- InvoiceRepository::invoicesForPatient/count + InvoiceService methods that
  shape rows and derive status.
- BillingController: GET /api/v1/my/billing/patient-payments and
  GET /api/v1/my/billing/patients/{patientUuid}/invoices (thin, resolveEntity,
  tenant-scoped, 403/404). Invoice::getIssuedAt / InvoiceItem::getTitle added.
- docs/api/billing.md documents both endpoints.

Frontend: useMyPayments hooks, MyPaymentsPage, MyPaymentDetailPage, routes in
App.tsx (doctor/secretary/clinic, blockClinicScope) and a sidebar entry.
Persian strings hardcoded per existing admin convention (no i18n infra).

Tests: tests/Billing/PatientPaymentsTest.php (8), useMyPayments + both page
tests (11). Note: pre-existing LoginPage.test failures are unrelated (proven
by stashing this change).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Billing/Entity/Invoice.php

@@ -92,6 +92,7 @@ class Invoice
     public function getSupplementaryInsuranceId(): ?int { return $this->supplementaryInsuranceId; }
     public function getTotalRials(): int    { return $this->totalRials; }
     public function getPatientRials(): int  { return $this->patientRials; }
+    public function getIssuedAt(): int      { return $this->issuedAt; }
     /** @return Collection<int, InvoiceItem> */
     public function getItems(): Collection  { return $this->items; }
 

src/Billing/Entity/InvoiceItem.php

@@ -70,6 +70,7 @@ class InvoiceItem
     public function getId(): ?int               { return $this->id; }
     public function getUuid(): string           { return $this->uuid; }
     public function getServiceItemId(): ?int    { return $this->serviceItemId; }
+    public function getTitle(): string          { return $this->title; }
     public function getTotalRials(): int        { return $this->totalRials; }
     public function getBaseInsuranceRials(): int { return $this->baseInsuranceRials; }
     public function getSupplementaryRials(): int { return $this->supplementaryRials; }