add system prompt and chunks index views and edit

src/Repository/SystemPromptRepository.php

@@ -0,0 +1,38 @@
+<?php
+// src/Repository/SystemPromptRepository.php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\SystemPrompt;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+class SystemPromptRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, SystemPrompt::class);
+    }
+
+    public function findActive(): ?SystemPrompt
+    {
+        return $this->createQueryBuilder('p')
+            ->andWhere('p.active = true')
+            ->orderBy('p.version', 'DESC')
+            ->setMaxResults(1)
+            ->getQuery()
+            ->getOneOrNullResult();
+    }
+
+    public function getNextVersion(): int
+    {
+        $max = $this->createQueryBuilder('p')
+            ->select('MAX(p.version)')
+            ->getQuery()
+            ->getSingleScalarResult();
+
+        return ((int)$max) + 1;
+    }
+}