feat(settings): Implementiere modulares Einstellungsmenü und Fenstermanagement

- Erstellung des `SettingsManager` als Autoload zur zentralen Verwaltung der Anzeigeeinstellungen.
- Implementierung der `OptionsMenu`-UI mit Dropdown (Auflösung) und CheckBox (Vollbild).
- Anwendung von Separation of Concerns: Strikte Trennung von grafischer Oberfläche und Hintergrundlogik.
- Behebung fehlerhafter Szenen-Abhängigkeiten und fehlerhafter Node-Pfade (Null-Referenzen).
- Umstellung der Logik auf `get_window()`, um die Kompatibilität mit Embedded Subwindows in Godot 4 sicherzustellen.

project.godot

@@ -14,10 +14,12 @@ config/name="Pong v1"
 run/main_scene="uid://bbjstb404m82i"
 config/features=PackedStringArray("4.7", "GL Compatibility")
 
+[autoload]
+
+SettingsManager="*uid://cq40er6phlcvk"
+
 [display]
 
-window/size/window_width_override=4608
-window/size/window_height_override=2592
 window/stretch/mode="canvas_items"
 
 [file_customization]

scene/Ping_Pong_v2.tscn

@@ -21,6 +21,16 @@ script = ExtResource("1_qr3af")
 ball = NodePath("Ball")
 score_label = NodePath("ScoreLabel")
 
+[node name="OptionsMenu" type="LinkButton" parent="." unique_id=1620714612]
+offset_left = 15.0
+offset_top = 17.0
+offset_right = 88.0
+offset_bottom = 57.0
+text = "Optionen"
+
+[node name="Camera2D" type="Camera2D" parent="." unique_id=966032468]
+position = Vector2(576, 324)
+
 [node name="Ball" type="CharacterBody2D" parent="." unique_id=1987649111]
 position = Vector2(576, 324)
 scale = Vector2(2, 2)
@@ -68,5 +78,4 @@ theme_override_font_sizes/font_size = 36
 text = "Punkt!"
 horizontal_alignment = 1
 
-[node name="Camera2D" type="Camera2D" parent="." unique_id=966032468]
-position = Vector2(576, 324)
+[connection signal="pressed" from="OptionsMenu" to="." method="_on_options_menu_pressed"]

scene/options_menu.tscn

@@ -0,0 +1,36 @@
+[gd_scene format=3 uid="uid://dag530gb7ejhj"]
+
+[ext_resource type="Script" uid="uid://dlxbk5ya2wfxk" path="res://scripts/options_menu.gd" id="1_23fbr"]
+
+[node name="SettingsManager" type="Control" unique_id=1891033022]
+layout_mode = 3
+anchors_preset = 0
+offset_top = 24.0
+offset_right = 1152.0
+offset_bottom = 24.0
+script = ExtResource("1_23fbr")
+
+[node name="settings" type="LinkButton" parent="." unique_id=1104305876]
+layout_mode = 0
+offset_left = 576.0
+offset_top = 324.0
+offset_right = 652.0
+offset_bottom = 364.0
+text = "Zum Spiel"
+
+[node name="VBoxContainer" type="VBoxContainer" parent="." unique_id=1366878422]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="FullscreenCheckButton" type="CheckBox" parent="VBoxContainer" unique_id=1435770377]
+layout_mode = 2
+text = "Vollbild"
+
+[node name="ResolutionOptionButton" type="OptionButton" parent="VBoxContainer" unique_id=531315819]
+layout_mode = 2
+
+[connection signal="pressed" from="settings" to="." method="_on_settings_pressed"]

scripts/Main.gd

@@ -28,3 +28,7 @@ func _process(_delta: float) -> void:
 func update_score_display() -> void:
 	if score_label:
 		score_label.text = str(score_links) + " : " + str(score_rechts)
+
+
+func _on_options_menu_pressed() -> void:
+	get_tree().change_scene_to_file("uid://dag530gb7ejhj")

scripts/SettingsManager.gd

@@ -0,0 +1,20 @@
+# settings_manager.gd (Autoload)
+extends Node
+
+func set_fullscreen(is_fullscreen: bool) -> void:
+	var window: Window = get_window()
+	
+	if is_fullscreen:
+		window.mode = Window.MODE_FULLSCREEN
+	else:
+		window.mode = Window.MODE_WINDOWED
+
+func set_resolution(width: int, height: int) -> void:
+	var window: Window = get_window()
+	
+	# Setzt die neue Größe
+	window.size = Vector2i(width, height)
+	
+	# Optional aber empfohlen für eine gute User Experience:
+	# Zentriert das Fenster nach der Größenänderung auf dem Monitor
+	window.move_to_center()

scripts/SettingsManager.gd.uid

@@ -0,0 +1 @@
+uid://cq40er6phlcvk

scripts/options_menu.gd

@@ -0,0 +1,26 @@
+# options_menu.gd (Nur an den Control-Knoten anhängen!)
+extends Control
+
+@onready var fullscreen_toggle: CheckBox = $VBoxContainer/FullscreenCheckButton
+@onready var resolution_dropdown: OptionButton = $VBoxContainer/ResolutionOptionButton
+
+func _ready() -> void:
+	# Dropdown-Werte initialisieren
+	resolution_dropdown.add_item("1920x1080", 0)
+	resolution_dropdown.add_item("1280x720", 1)
+	
+	# Signale verbinden
+	resolution_dropdown.item_selected.connect(_on_resolution_selected)
+	fullscreen_toggle.toggled.connect(_on_fullscreen_toggled)
+
+func _on_fullscreen_toggled(button_pressed: bool) -> void:
+	# Delegation der Aufgabe an den Autoload
+	SettingsManager.set_fullscreen(button_pressed)
+
+func _on_resolution_selected(index: int) -> void:
+	match index:
+		0: SettingsManager.set_resolution(1920, 1080)
+		1: SettingsManager.set_resolution(1280, 720)
+
+func _on_settings_pressed() -> void:
+	get_tree().change_scene_to_file("uid://bbjstb404m82i")

scripts/options_menu.gd.uid

@@ -0,0 +1 @@
+uid://dlxbk5ya2wfxk