Quaternius weapons, input fixes, sound & path fixes

- Added 6 Quaternius weapon models (Pistol, Revolver, Rifle, Shotgun, P90, SniperRifle)
- Created weapon resource files with balanced stats
- Wired Pistol + Rifle into player.tscn replacing Kenney blasters
- Fixed WASD input (matched input map action names)
- Fixed Escape key toggles mouse capture
- Added Audio autoload singleton
- Fixed broken sound asset paths across all scripts
- Fixed all scene ext_resource text paths (nested under assets/kenney-fps/)
- Fixed all .import source_file paths
- Deleted stale .import files (will be regenerated by editor on open)

examples/multiplayer-fps/scripts/weapon_manager.gd

@@ -26,6 +26,7 @@ var _pending_grenades: Array[Dictionary] = []  # Buffered throws, consumed in _a
 
 # Weapon models (loaded at runtime)
 var _knife_model: Node3D
+var _pistol_model: Node3D
 var _gun_model: Node3D
 var _grenade_model: Node3D
 var _current_visible_slot: int = -1
@@ -40,17 +41,61 @@ func _ready():
 	_load_weapon_models()
 
 func _load_weapon_models():
-	# Knife model
-	var knife_scene := load("res://examples/multiplayer-fps/models/knife.fbx") as PackedScene
-	if knife_scene:
-		_knife_model = knife_scene.instantiate()
-		_knife_model.scale = Vector3(0.003, 0.003, 0.003)
-		_knife_model.position = Vector3(0.15, -0.22, -0.35)
-		_knife_model.rotation_degrees = Vector3(-90, 180, 0)
-		add_child(_knife_model)
+	# Weapon models from Quaternius FPS Pack — GLB format, reliable import
+	
+	# Slot 0 (melee) + Slot 1 (pistol): Use Quaternius Pistol model
+	var pistol_scene := load("res://assets/quaternius/models/Pistol.glb") as PackedScene
+	if pistol_scene:
+		# Slot 0: small pistol as melee visual
+		var knife = pistol_scene.instantiate()
+		knife.scale = Vector3(0.35, 0.35, 0.35)
+		knife.position = Vector3(0.08, -0.18, -0.28)
+		knife.rotation_degrees = Vector3(-90, 180, 0)
+		add_child(knife)
+		_knife_model = knife
 		_knife_model.hide()
+		
+		# Slot 1: same pistol model, slightly different position
+		var pistol = pistol_scene.instantiate()
+		pistol.scale = Vector3(0.35, 0.35, 0.35)
+		pistol.position = Vector3(0.08, -0.18, -0.28)
+		pistol.rotation_degrees = Vector3(-90, 180, 0)
+		add_child(pistol)
+		_pistol_model = pistol
+		_pistol_model.hide()
+	else:
+		print("[WM] Pistol model not available — using placeholder")
+		for slot in [0, 1]:
+			var box := MeshInstance3D.new()
+			box.mesh = BoxMesh.new()
+			box.mesh.size = Vector3(0.3, 0.05, 0.02)
+			box.position = Vector3(0.15, -0.22, -0.35)
+			box.rotation_degrees = Vector3(-90, 0, 0)
+			add_child(box)
+			if slot == 0:
+				_knife_model = box
+			else:
+				_pistol_model = box
+			box.hide()
 
-	# Grenade model
+	# Slot 2 (primary rifle): Use Quaternius Rifle model
+	var rifle_scene := load("res://assets/quaternius/models/Rifle.glb") as PackedScene
+	if not rifle_scene:
+		rifle_scene = load("res://assets/quaternius/models/P90.glb") as PackedScene
+	if rifle_scene:
+		var rifle = rifle_scene.instantiate()
+		rifle.scale = Vector3(0.35, 0.35, 0.35)
+		rifle.position = Vector3(0.06, -0.16, -0.25)
+		rifle.rotation_degrees = Vector3(-90, 180, 0)
+		add_child(rifle)
+		if _gun_model:
+			_gun_model.hide()
+		_gun_model = rifle
+		_gun_model.hide()
+	else:
+		print("[WM] Rifle model not available — using placeholder TinyGun")
+
+	# Grenade model (keep existing)
 	var grenade_scene := load("res://examples/multiplayer-fps/models/grenade.glb") as PackedScene
 	if grenade_scene:
 		_grenade_model = grenade_scene.instantiate()
@@ -59,21 +104,7 @@ func _load_weapon_models():
 		add_child(_grenade_model)
 		_grenade_model.hide()
 
-	# Gun model — replace placeholder box with Kenney blaster
-	var gun_scene := load("res://assets/kenney/models/blaster.glb") as PackedScene
-	if gun_scene:
-		var blaster = gun_scene.instantiate()
-		blaster.scale = Vector3(0.003, 0.003, 0.003)
-		blaster.position = Vector3(0.09, -0.18, -0.3)
-		blaster.rotation_degrees = Vector3(-90, 180, 0)
-		add_child(blaster)
-		# Hide the old box mesh, use blaster instead
-		if _gun_model:
-			_gun_model.hide()
-		_gun_model = blaster
-		_gun_model.hide()
-
-	# Knife sound
+	# Knife slash sound
 	var slash_stream := load("res://examples/multiplayer-fps/sounds/knife/knife_slash1.wav")
 	if slash_stream:
 		_knife_sound = AudioStreamPlayer3D.new()
@@ -87,14 +118,18 @@ func _process(_delta: float):
 		_current_visible_slot = active_slot
 		if _knife_model:
 			_knife_model.visible = (active_slot == 0)
+		if _pistol_model:
+			_pistol_model.visible = (active_slot == 1)
 		if _gun_model:
-			_gun_model.visible = (active_slot == 1 or active_slot == 2)
+			_gun_model.visible = (active_slot == 2)
 		if _grenade_model:
 			_grenade_model.visible = (active_slot == 3)
 
 func hide_weapons():
 	if _knife_model:
 		_knife_model.hide()
+	if _pistol_model:
+		_pistol_model.hide()
 	if _gun_model:
 		_gun_model.hide()
 	if _grenade_model:
@@ -104,6 +139,12 @@ func hide_weapons():
 func show_weapons():
 	_current_visible_slot = -1  # Force refresh on next _process
 
+# Debug helpers for window title
+func has_knife_model() -> bool:
+	return _knife_model != null
+func has_gun_model() -> bool:
+	return _gun_model != null
+
 func get_active_weapon() -> WeaponData:
 	var wid := inventory[active_slot]
 	if wid == 0: