feat(poc): implement Sprint 1 proof of concept

- project.godot with autoload configuration
- Reception room with placeholder visuals
- Draggable Character with DragDropComponent
- Interactive flower object with bounce animation
- GameState, SaveManager, AudioManager, InputManager autoloads
- HUD with back button and music toggle

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

project.godot

@@ -1,10 +1,6 @@
 ; Engine configuration file.
 ; It's best edited using the editor UI and not directly,
-; since the parameters that go here are not all obvious.
-;
-; Format:
-;   [section] ; section goes here
-;   param=value ; parameter goes here
+; but this is the source of truth for engine configuration.
 
 config_version=5
 
@@ -13,7 +9,16 @@ config_version=5
 config/name="Cozypaw Hospital"
 config/description="Werbefrei. Offline. Für Kinder."
 config/version="0.1.0"
+run/main_scene="res://scenes/main/Main.tscn"
 config/features=PackedStringArray("4.6", "Mobile")
+boot_splash/show_image=false
+
+[autoload]
+
+GameState="*res://scripts/autoload/GameState.gd"
+SaveManager="*res://scripts/autoload/SaveManager.gd"
+AudioManager="*res://scripts/autoload/AudioManager.gd"
+InputManager="*res://scripts/autoload/InputManager.gd"
 
 [display]