add system prompt and chunks index views and edit

src/Entity/SystemPrompt.php

@@ -0,0 +1,111 @@
+<?php
+// src/Entity/SystemPrompt.php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Uid\Uuid;
+
+#[ORM\Entity]
+#[ORM\Table(name: 'system_prompt')]
+class SystemPrompt
+{
+    #[ORM\Id]
+    #[ORM\Column(type: 'uuid', unique: true)]
+    private Uuid $id;
+
+    #[ORM\Column(type: 'integer')]
+    private int $version;
+
+    #[ORM\Column(type: 'text')]
+    private string $content;
+
+    // 📝 Neuer Kommentar
+    #[ORM\Column(type: 'string', length: 255, nullable: true)]
+    private ?string $comment = null;
+
+    #[ORM\Column(type: 'boolean')]
+    private bool $active = false;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private \DateTimeImmutable $createdAt;
+
+    // Optional für Governance / spätere Audit-Erweiterung
+    #[ORM\Column(type: 'datetime_immutable', nullable: true)]
+    private ?\DateTimeImmutable $updatedAt = null;
+
+    public function __construct(
+        int $version,
+        string $content,
+        ?string $comment = null,
+        bool $active = false
+    ) {
+        $this->id = Uuid::v4();
+        $this->version = $version;
+        $this->content = $content;
+        $this->comment = $comment;
+        $this->active = $active;
+        $this->createdAt = new \DateTimeImmutable();
+    }
+
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getVersion(): int
+    {
+        return $this->version;
+    }
+
+    public function getContent(): string
+    {
+        return $this->content;
+    }
+
+    public function getComment(): ?string
+    {
+        return $this->comment;
+    }
+
+    public function isActive(): bool
+    {
+        return $this->active;
+    }
+
+    public function getCreatedAt(): \DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): ?\DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    public function activate(): void
+    {
+        $this->active = true;
+        $this->touch();
+    }
+
+    public function deactivate(): void
+    {
+        $this->active = false;
+        $this->touch();
+    }
+
+    public function updateContent(string $content, ?string $comment = null): void
+    {
+        $this->content = $content;
+        $this->comment = $comment;
+        $this->touch();
+    }
+
+    private function touch(): void
+    {
+        $this->updatedAt = new \DateTimeImmutable();
+    }
+}