fix: CameraOrbitKeyboard + playersAlive HUD

- CameraOrbitKeyboard: clic droit = unlock, clic gauche = re-lock (coherent avec PlayerController)
- CameraOrbitKeyboard: bloque les inputs quand ChatUI est ouvert
- CameraOrbitKeyboard: OnEnable ne verrouille plus la souris si un panel UI est ouvert
- NetworkManager: alimente GameHUD.SetPlayersAlive via Listen(playersAlive)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

game/Assets/Scripts/CameraOrbitKeyboard.cs

@@ -29,6 +29,8 @@ public class CameraOrbitKeyboard : MonoBehaviour
     {
         // On gère la souris nous-mêmes
         if (_axisController != null) _axisController.enabled = false;
+        // Only lock cursor if no UI panel is open
+        if (!ChatUI.IsVisible && !KeyBindingUI.IsVisible)
             LockCursor();
     }
 
@@ -55,16 +57,16 @@ public class CameraOrbitKeyboard : MonoBehaviour
 
         var mouse = Mouse.current;
 
-        // Clic droit = toggle lock
-        if (mouse != null && mouse.rightButton.wasPressedThisFrame)
+        // Right-click unlocks, left-click re-locks (consistent with PlayerController)
+        if (!ChatUI.IsVisible && !KeyBindingUI.IsVisible && mouse != null)
         {
-            if (Cursor.lockState == CursorLockMode.Locked)
+            if (Cursor.lockState == CursorLockMode.Locked && mouse.rightButton.wasPressedThisFrame)
                 UnlockCursor();
-            else
+            else if (Cursor.lockState != CursorLockMode.Locked && mouse.leftButton.wasPressedThisFrame)
                 LockCursor();
         }
 
-        if (KeyBindingUI.IsVisible) return;
+        if (KeyBindingUI.IsVisible || ChatUI.IsVisible) return;
 
         // Souris — seulement quand locked (delta infini, sans accrochage au bord)
         if (Cursor.lockState == CursorLockMode.Locked && mouse != null)

game/Assets/Scripts/Network/NetworkManager.cs

@@ -154,6 +154,7 @@ public class NetworkManager : MonoBehaviour
         _callbacks.OnRemove(state => state.players, (key, player) => OnPlayerRemove(key, player));
         _callbacks.Listen(state => state.phase, (v, _) => _OnPhaseChanged(v));
         _callbacks.Listen(state => state.countdown, (v, _) => OnCountdownChanged?.Invoke(v));
+        _callbacks.Listen(state => state.playersAlive, (v, _) => GameHUD.Instance?.SetPlayersAlive(v));
 
         _room.OnMessage<EliminatedMsg>("eliminated", msg => { OnEliminated?.Invoke(msg.sessionId, msg.reason); });
         _room.OnMessage<QualifiedMsg> ("qualified",  msg => { OnQualified?.Invoke(msg.sessionId); });