WIP moving difficulty selection to engine

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

packages/wolf_3d_dart/lib/src/input/cli_input.dart

@@ -14,10 +14,32 @@ class CliInput extends Wolf3dInput {
   bool _pRight = false;
   bool _pFire = false;
   bool _pInteract = false;
+  bool _pBack = false;
   WeaponType? _pWeapon;
 
   /// Queues a raw terminal key sequence for the next engine frame.
   void handleKey(List<int> bytes) {
+    // Escape sequences for arrow keys (CSI A/B/C/D) in raw terminal mode.
+    if (bytes.length >= 3 && bytes[0] == 27 && bytes[1] == 91) {
+      if (bytes[2] == 65) _pForward = true; // Up
+      if (bytes[2] == 66) _pBackward = true; // Down
+      if (bytes[2] == 67) _pRight = true; // Right
+      if (bytes[2] == 68) _pLeft = true; // Left
+      return;
+    }
+
+    // Bare Escape key is a menu back action.
+    if (bytes.length == 1 && bytes[0] == 27) {
+      _pBack = true;
+      return;
+    }
+
+    // Enter maps to menu select/confirm.
+    if (bytes.length == 1 && (bytes[0] == 13 || bytes[0] == 10)) {
+      _pInteract = true;
+      return;
+    }
+
     String char = String.fromCharCodes(bytes).toLowerCase();
 
     if (char == 'w') _pForward = true;
@@ -45,10 +67,12 @@ class CliInput extends Wolf3dInput {
     isTurningRight = _pRight;
     isFiring = _pFire;
     isInteracting = _pInteract;
+    isBack = _pBack;
     requestedWeapon = _pWeapon;
 
     // Reset the pending buffer so each keypress behaves like a frame impulse.
     _pForward = _pBackward = _pLeft = _pRight = _pFire = _pInteract = false;
+    _pBack = false;
     _pWeapon = null;
   }
 }

packages/wolf_3d_dart/lib/src/input/wolf_3d_input.dart

@@ -7,6 +7,9 @@ abstract class Wolf3dInput {
   bool isTurningLeft = false;
   bool isTurningRight = false;
   bool isInteracting = false;
+  bool isBack = false;
+  double? menuTapX;
+  double? menuTapY;
   bool isFiring = false;
   WeaponType? requestedWeapon;
 
@@ -22,6 +25,9 @@ abstract class Wolf3dInput {
     isTurningRight: isTurningRight,
     isFiring: isFiring,
     isInteracting: isInteracting,
+    isBack: isBack,
+    menuTapX: menuTapX,
+    menuTapY: menuTapY,
     requestedWeapon: requestedWeapon,
   );
 }
@@ -33,6 +39,7 @@ enum WolfInputAction {
   turnRight,
   fire,
   interact,
+  back,
   weapon1,
   weapon2,
   weapon3,