feat: port inventory (انبارداری) page from tauri to admin dashboard

Add a per-tenant (doctor/clinic) Inventory domain and admin page, ported
from clinic-pro-tauri /inventory (which was static/mock) into a real feature.

Backend (src/Inventory/):
- Entities InventoryItem, InventoryPackage, InventoryPackageItem, scoped via
  entity_type/entity_id like TenantTag. Item status is derived, package total
  and availability derived at read time.
- InventoryService (stats, package assembly, availability), thin
  InventoryController with CRUD for items and packages + categories endpoint.
- Migration + docs/api/inventory.md + functional tests (10 tests, 42 assertions).

Frontend (assets/admin/):
- InventoryPage with two tabs (کالاهای مصرفی / پکیج), stat cards, items table
  (desktop + mobile cards), packages accordion, add/edit item and package
  modals, search + category filter — pixel-matched to the tauri source.
- useInventory hook (TanStack Query), route + sidebar link for doctor/clinic.
- Vitest coverage (real data, empty state, modal, packages tab).

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

src/Inventory/Repository/InventoryItemRepository.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Inventory\Repository;
+
+use App\Inventory\Entity\InventoryItem;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+class InventoryItemRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, InventoryItem::class);
+    }
+
+    public function findByUuid(string $uuid): ?InventoryItem
+    {
+        return $this->findOneBy(['uuid' => $uuid]);
+    }
+
+    /** @return InventoryItem[] */
+    public function findByEntity(string $entityType, int $entityId): array
+    {
+        return $this->createQueryBuilder('i')
+            ->where('i.entityType = :type AND i.entityId = :id')
+            ->setParameter('type', $entityType)
+            ->setParameter('id', $entityId)
+            ->orderBy('i.name', 'ASC')
+            ->getQuery()
+            ->getResult();
+    }
+
+    /**
+     * Distinct non-empty "consumable" values for the tenant — powers the
+     * category filter dropdown on the inventory page.
+     *
+     * @return string[]
+     */
+    public function findConsumables(string $entityType, int $entityId): array
+    {
+        $rows = $this->createQueryBuilder('i')
+            ->select('DISTINCT i.consumable AS consumable')
+            ->where('i.entityType = :type AND i.entityId = :id AND i.consumable IS NOT NULL AND i.consumable != :empty')
+            ->setParameter('type', $entityType)
+            ->setParameter('id', $entityId)
+            ->setParameter('empty', '')
+            ->orderBy('i.consumable', 'ASC')
+            ->getQuery()
+            ->getArrayResult();
+
+        return array_map(static fn(array $r): string => $r['consumable'], $rows);
+    }
+
+    public function save(InventoryItem $item): void
+    {
+        $this->getEntityManager()->persist($item);
+        $this->getEntityManager()->flush();
+    }
+
+    public function remove(InventoryItem $item): void
+    {
+        $this->getEntityManager()->remove($item);
+        $this->getEntityManager()->flush();
+    }
+}