Add tests and implementation for ServiceDetailPage and PriceInput components

- Implement PriceInput component tests to validate Persian and Arabic numeral handling, input formatting, and controlled behavior.
- Create ServiceDetailPage component with detailed service information, including pricing, insurance coverage, and editing capabilities.
- Add API tests for service item detail retrieval and coverage synchronization with insurance contracts.
- Ensure proper error handling and user feedback for service item retrieval and coverage management.

assets/admin/components/inventory/AddPackageModal.tsx

@@ -2,7 +2,7 @@ import React, { useEffect, useMemo, useState } from 'react';
 import { TrashIcon } from '@heroicons/react/24/outline';
 import Modal from '../ui/Modal';
 import SearchableSelect from '../ui/SearchableSelect';
-import { formatRial } from '../../lib/utils';
+import { formatRial, digitsOnly } from '../../lib/utils';
 import type { InventoryItem, InventoryPackage, PackagePayload } from '../../hooks/useInventory';
 
 interface Props {
@@ -89,7 +89,7 @@ export default function AddPackageModal({ open, editing, items, saving, onClose,
             <div>
               <label className="field-label">مقدار</label>
               <div className="field">
-                <input value={amount} inputMode="numeric" onChange={(e) => setAmount(e.target.value.replace(/[^0-9]/g, ''))} placeholder="1" />
+                <input value={amount} inputMode="numeric" onChange={(e) => setAmount(digitsOnly(e.target.value))} placeholder="1" />
               </div>
             </div>
             <button className="btn ghost" style={{ justifyContent: 'center', height: 46 }} onClick={addLine} disabled={items.length === 0}>