Replace M* table-wrapper classes with typed Resources; add type hints

Two related cleanups from the best-practice audit:

Task 3 — typed Resources instead of MBase / MScene / MLevel / MSetting

The old model classes wrapped the godot_db_manager Table API: each row
read went through table.get_data_at_row_idx(int), Cell.get_data(),
and 'as int' / 'as String' casts that don't actually parse anything
in Godot 4. m_value, m_lock, m_label, ... members shadowed the cell
indirection. Setters round-tripped through table.edit_data() +
Global.database.save_db(). That's a lot of plumbing for what is, in
the end, three flat tables of static strings.

Introduce three @export-typed Resources:
  db/scene_entry.gd     class_name SceneEntry
  db/level_entry.gd     class_name LevelEntry
  db/settings_data.gd   class_name SettingsData

Rewrite scripts/Database.gd so Database.DB holds:
  settings: SettingsData
  levels:   Array[LevelEntry]
  scenes:   Array[SceneEntry]

Build them once at startup from ahog.json, and serialise back to the
same JSON shape on save() so existing progress files keep working.
LevelEntry carries its own object_to_find / object_finding / reset
methods (talking to Global.database for cross-table lookups), and
SceneEntry carries its own mesh_path / audio_sound. Per-scene
dissolve state (value, tick_reference, dissolved) lives on
SceneEntry as non-exported runtime fields.

Delete db/MBase.gd / db/MScene.gd / db/MLevel.gd / db/MSetting.gd.

Update consumers:
- scripts/Setting.gd: read/write Global.database.settings directly,
  call Global.database.save() after each setter.
- scenes/levels/Levels.gd: iterate Global.database.scenes_for_level(
  current_scene_int) instead of mscene.new(i) for every row; scene
  state reads (scene.lock, scene.mesh, scene.counter, ...) replace
  scene.lock() / scene.mesh() / scene.counter() method calls; runtime
  dissolve state lives on the SceneEntry instance instead of mutable
  m_value / m_tick_reference members on MScene; 'dissolved' flag
  replaces set_mesh(null) signalling.
- scenes/UI/choose_scenes/ChooseScene.gd: iterate Global.database
  .levels; level.name / level.thumb property access in place of
  level.name() / level.thumbnail(). configure_reset() loses its
  redundant index argument (LevelEntry knows its own index).
- scripts/event.gd: _on_reset_level signature now takes LevelEntry,
  reset path drops index forwarding.

Task 2 — type hints across the remaining scripts

scripts/Global.gd, scenes/Main.gd, scenes/UI/ending/Ending.gd,
scenes/UI/loading/Loading.gd, scenes/UI/settings/Settings.gd: add
typed parameters and -> return annotations. current_scene_int is now
'int = -1' (sentinel) so callers don't fall into Variant comparisons;
event.gd:_on_reset_level resets it to -1 instead of null.
Settings.gd no longer wraps button_pressed in int() before passing to
the now-typed bool setters.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scenes/Main.gd

@@ -4,55 +4,49 @@ extends Node
 @export var setting: PackedScene = load("res://scenes/UI/settings/Settings.tscn")
 @export var choose_scene: PackedScene = load("res://scenes/UI/choose_scenes/ChooseScene.tscn")
 
-@onready var current_scene = "title"
-@onready var stream_button = preload("res://assets/sounds/click-button.ogg")
-@onready var home = $MarginContainer/HBoxContainer/UI_summary/PanelWood/VBoxContainer/CenterContainer/TextureRect
+@onready var stream_button: AudioStream = preload("res://assets/sounds/click-button.ogg")
+@onready var home: TextureButton = $MarginContainer/HBoxContainer/UI_summary/PanelWood/VBoxContainer/CenterContainer/TextureRect
 
-func _ready():
+func _ready() -> void:
 	_translation()
-	home.set_focus_mode(2)
+	home.focus_mode = Control.FOCUS_ALL
 	home.grab_focus()
 	_apply_scene(title)
 	_configure_sound()
 
-func _configure_sound():
-	stream_button.set_loop(false)
+func _configure_sound() -> void:
+	if stream_button is AudioStreamOggVorbis:
+		stream_button.loop = false
 	$MarginContainer/HBoxContainer/UI_summary/ClickButton.stream = stream_button
 
 ## PRIVATE
-func _translation():
+func _translation() -> void:
 	$MarginContainer/HBoxContainer/UI_summary/PanelWood/VBoxContainer/ButtonPuzzle/Label.text = tr("MAIN_BUTTON_PUZZLES")
 	$MarginContainer/HBoxContainer/UI_summary/PanelWood/VBoxContainer/ButtonSetting/Label.text = tr("MAIN_BUTTON_SETTINGS")
 	$MarginContainer/HBoxContainer/UI_summary/PanelWood/VBoxContainer/ButtonQuit/Label.text = tr("MAIN_BUTTON_QUIT")
 	$MarginContainer/HBoxContainer/UI_summary/PanelWood/VBoxContainer/ContainerVersion/LabelVersion.text = Setting.get_setting_version()
 
-func _apply_scene(actual_scene):
-	var node = get_node("MarginContainer/HBoxContainer/MarginContainer/")
-	
+func _apply_scene(actual_scene: PackedScene) -> void:
+	var node := get_node("MarginContainer/HBoxContainer/MarginContainer/")
 	if node.get_child_count() != 0:
 		node.get_child(0).queue_free()
-	
 	node.add_child(actual_scene.instantiate())
 
-# Load scene for select game
-func _on_ButtonPuzzle_pressed():
+func _on_ButtonPuzzle_pressed() -> void:
 	_sound_button()
 	_apply_scene(choose_scene)
 
-# Load scene settings
-func _on_ButtonSetting_pressed():
+func _on_ButtonSetting_pressed() -> void:
 	_sound_button()
 	_apply_scene(setting)
 
-# Click to icon game
-func _on_TextureRect_pressed():
+func _on_TextureRect_pressed() -> void:
 	_sound_button()
 	_apply_scene(title)
 
-# Quit the game
-func _on_ButtonQuit_pressed():
+func _on_ButtonQuit_pressed() -> void:
 	_sound_button()
 	get_tree().quit(0)
 
-func _sound_button():
+func _sound_button() -> void:
 	$MarginContainer/HBoxContainer/UI_summary/ClickButton.play()