Follow the GDScript style guide in every script

- Types on every parameter, return value and variable, and snake_case names
  (the player name limit is the constant MAX_NAME_LENGTH).
- Spelling fixes: *_triggered, character_selected, separator, caught_errors.
  The server's catched_errors key stays as the server sends it.
- Signals are connected with signal.connect() instead of by name.
- Code is ordered signals, constants, exported vars, vars, @onready vars,
  functions, with @onready on one line and two blank lines between functions.
- Every script starts with a ## description. Template comments, old LOC notes
  and commented-out code are gone, apart from the local play code.
- Lines are at most 100 characters, apart from the local play path.
- The screenshot tour turns off the blinking text cursor so pictures match.

inspiration_list.gd

@@ -4,35 +4,36 @@ extends ScrollContainer
 ## by itself, at the speed set in the settings.
 
 ## The soundtracks shown, in order.
+
 var soundtracks: Array = []
 
 # Scroll direction: 1 = down, -1 = up
 var scroll_direction: int = 1
 
-@onready
-var _rows: VBoxContainer = $VBoxContainer
+@onready var _rows: VBoxContainer = $VBoxContainer
+
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	scroll_direction = 1
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
+
 func _process(delta: float) -> void:
 	var speed_pixels_per_second: float = float(Settings.inspiration_list_speed) * 60.0
 	var scroll_amount: float = speed_pixels_per_second * delta * float(scroll_direction)
 
-	var scroll_bar = get_v_scroll_bar()
+	var scroll_bar: VScrollBar = get_v_scroll_bar()
 
 	# Don't scroll if list is empty or too short
 	if scroll_bar.max_value <= 0:
 		return
 
-	var current_pos = scroll_bar.value
+	var current_pos: float = scroll_bar.value
 
 	if scroll_direction == 1:
 		# Scrolling down
 		if current_pos + scroll_bar.page < scroll_bar.max_value:
-			scroll_bar.value = min(current_pos + scroll_amount, scroll_bar.max_value - scroll_bar.page)
+			scroll_bar.value = minf(current_pos + scroll_amount,
+					scroll_bar.max_value - scroll_bar.page)
 		else:
 			# Reached bottom, reverse direction
 			scroll_direction = -1
@@ -40,7 +41,7 @@ func _process(delta: float) -> void:
 	else:
 		# Scrolling up
 		if current_pos > 0:
-			scroll_bar.value = max(current_pos + scroll_amount, 0)
+			scroll_bar.value = maxf(current_pos + scroll_amount, 0)
 		else:
 			# Reached top, reverse direction
 			scroll_direction = 1
@@ -50,7 +51,7 @@ func _process(delta: float) -> void:
 ## Fetches every soundtrack from the server and shows them.
 func load_from_server() -> void:
 	GameLog.debug("load_from_server")
-	var populate_list: Callable = func populate_list(array) -> void:
+	var populate_list: Callable = func populate_list(array: Variant) -> void:
 		if typeof(array) == TYPE_ARRAY:
 			show_soundtracks(array)
 		else: