feat(avatar) : add avatarFileName field to User entity

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Entity/User.php

@@ -70,6 +70,10 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
     #[ORM\Column(length: 64, unique: true, nullable: true)]
     private ?string $apiToken = null;
 
+    #[ORM\Column(length: 255, nullable: true)]
+    #[Groups(['me:read', 'user:list'])]
+    private ?string $avatarFileName = null;
+
     #[ORM\ManyToOne(targetEntity: Client::class)]
     #[ORM\JoinColumn(nullable: true, onDelete: 'SET NULL')]
     #[Groups(['me:read', 'user:list', 'user:write'])]
@@ -199,5 +203,27 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
         return $this;
     }
 
+    public function getAvatarFileName(): ?string
+    {
+        return $this->avatarFileName;
+    }
+
+    public function setAvatarFileName(?string $avatarFileName): static
+    {
+        $this->avatarFileName = $avatarFileName;
+
+        return $this;
+    }
+
+    #[Groups(['me:read', 'task:read', 'user:list', 'time_entry:read', 'client_ticket:read'])]
+    public function getAvatarUrl(): ?string
+    {
+        if (null === $this->avatarFileName) {
+            return null;
+        }
+
+        return '/api/users/'.$this->id.'/avatar';
+    }
+
     public function eraseCredentials(): void {}
 }