Add wrapping keyboard and gamepad focus rings

- Link every modal's enabled controls into a wrapping UiFocus ring and give each screen a default focus target.
- Add gamepad A/B bindings for ui_accept/ui_cancel; include Start menu footer actions and Continue in its focus ring.
- Skip hidden/disabled controls, close focus traps via per-modal cancel behavior, and return review to the menu on cancel.
- Record the focus audit and add regression coverage.

src/game/ui/event_timeline.gd

@@ -10,6 +10,7 @@ signal closed()
 const Strings := preload("res://src/core/strings.gd")
 const UiArt := preload("res://src/game/ui/art.gd")
 const UiStyles := preload("res://src/game/ui/ui_styles.gd")
+const UiFocus := preload("res://src/game/ui/ui_focus.gd")
 
 var events: Array[Dictionary] = []
 var index := 0
@@ -18,6 +19,7 @@ var _detail_label: Label = null
 var _counter_label: Label = null
 var _prev_button: Button = null
 var _next_button: Button = null
+var _close_button: Button = null
 var _root: Control = null
 
 func _init() -> void:
@@ -107,12 +109,12 @@ func _build() -> void:
 	UiStyles.apply_button(_next_button, 15, true)
 	row.add_child(_next_button)
 
-	var close := Button.new()
-	close.name = "CloseButton"
-	close.text = Strings.lookup("timeline.close")
-	close.pressed.connect(_on_close)
-	UiStyles.apply_button(close, 15, true)
-	row.add_child(close)
+	_close_button = Button.new()
+	_close_button.name = "CloseButton"
+	_close_button.text = Strings.lookup("timeline.close")
+	_close_button.pressed.connect(_on_close)
+	UiStyles.apply_button(_close_button, 15, true)
+	row.add_child(_close_button)
 
 	var hint := Label.new()
 	hint.text = Strings.lookup("timeline.hint")
@@ -144,6 +146,9 @@ func show_timeline(review: Dictionary) -> void:
 	_root.visible = true
 	Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
 	_refresh()
+	var first := UiFocus.first_enabled([_prev_button, _next_button, _close_button])
+	if first:
+		first.grab_focus()
 
 func step(direction: int) -> void:
 	if events.is_empty():
@@ -165,6 +170,12 @@ func _refresh() -> void:
 		_prev_button.disabled = not has_events or index <= 0
 	if _next_button:
 		_next_button.disabled = not has_events or index >= events.size() - 1
+	UiFocus.link([_prev_button, _next_button, _close_button])
+	# A disabled control cannot keep focus; move to the other end of the row.
+	if _prev_button and _prev_button.disabled and _prev_button.has_focus() and _close_button:
+		_close_button.grab_focus()
+	if _next_button and _next_button.disabled and _next_button.has_focus() and _close_button:
+		_close_button.grab_focus()
 	if not has_events:
 		_counter_label.text = Strings.lookup("timeline.empty")
 		_detail_label.text = ""
@@ -225,6 +236,10 @@ func _stamp(at_ms: int) -> String:
 func _unhandled_input(event: InputEvent) -> void:
 	if not visible:
 		return
+	if event.is_action_pressed("ui_cancel"):
+		close()
+		get_viewport().set_input_as_handled()
+		return
 	if event is InputEventKey and event.pressed and not event.echo:
 		match event.keycode:
 			KEY_LEFT, KEY_A:
@@ -233,6 +248,3 @@ func _unhandled_input(event: InputEvent) -> void:
 			KEY_RIGHT, KEY_D:
 				step(1)
 				get_viewport().set_input_as_handled()
-			KEY_ESCAPE:
-				close()
-				get_viewport().set_input_as_handled()