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/shift_review.gd

@@ -5,6 +5,7 @@ extends CanvasLayer
 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")
 
 signal restart_requested()
 signal continue_requested()
@@ -16,6 +17,9 @@ var _review: Dictionary = {}
 var report_label: Label
 var _campaign_label: Label = null
 var _continue_button: Button = null
+var _timeline_button: Button = null
+var _restart_button: Button = null
+var _quit_button: Button = null
 
 func _init() -> void:
 	name = "ShiftReview"
@@ -56,33 +60,36 @@ func _init() -> void:
 	center.add_child(_campaign_label)
 
 	_continue_button = Button.new()
+	_continue_button.name = "ContinueButton"
 	_continue_button.text = Strings.lookup("review.continue_campaign")
 	_continue_button.pressed.connect(func(): continue_requested.emit())
 	_continue_button.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
 	center.add_child(_continue_button)
 
-	var timeline := Button.new()
-	timeline.name = "TimelineButton"
-	timeline.text = Strings.lookup("review.timeline_button")
-	timeline.pressed.connect(func(): timeline_requested.emit(_review))
-	timeline.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
-	center.add_child(timeline)
+	_timeline_button = Button.new()
+	_timeline_button.name = "TimelineButton"
+	_timeline_button.text = Strings.lookup("review.timeline_button")
+	_timeline_button.pressed.connect(func(): timeline_requested.emit(_review))
+	_timeline_button.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
+	center.add_child(_timeline_button)
 
-	var restart := Button.new()
-	restart.text = Strings.lookup("ui.review_return_menu")
-	restart.pressed.connect(func(): restart_requested.emit())
-	restart.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
-	center.add_child(restart)
+	_restart_button = Button.new()
+	_restart_button.name = "ReturnMenuButton"
+	_restart_button.text = Strings.lookup("ui.review_return_menu")
+	_restart_button.pressed.connect(func(): restart_requested.emit())
+	_restart_button.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
+	center.add_child(_restart_button)
 
-	var quit_btn := Button.new()
-	quit_btn.text = Strings.lookup("ui.quit_game")
-	quit_btn.pressed.connect(func(): get_tree().quit())
-	quit_btn.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
-	_style_review_button(timeline)
+	_quit_button = Button.new()
+	_quit_button.name = "QuitButton"
+	_quit_button.text = Strings.lookup("ui.quit_game")
+	_quit_button.pressed.connect(func(): get_tree().quit())
+	_quit_button.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
+	_style_review_button(_timeline_button)
 	_style_review_button(_continue_button)
-	_style_review_button(restart)
-	_style_review_button(quit_btn)
-	center.add_child(quit_btn)
+	_style_review_button(_restart_button)
+	_style_review_button(_quit_button)
+	center.add_child(_quit_button)
 
 func _style_review_button(button: Button) -> void:
 	button.custom_minimum_size = Vector2(300, 52)
@@ -154,4 +161,16 @@ func show_review(review: Dictionary, scenario: Resource, history: Array = [],
 			_campaign_label.text = ""
 	if _continue_button:
 		_continue_button.visible = not campaign_complete and next_venue != ""
-	visible = true
+	visible = true
+	var buttons: Array = [_continue_button, _timeline_button, _restart_button, _quit_button]
+	UiFocus.link(buttons)
+	var first := UiFocus.first_enabled(buttons)
+	if first:
+		first.grab_focus()
+
+func _unhandled_input(event: InputEvent) -> void:
+	if not visible:
+		return
+	if event.is_action_pressed("ui_cancel"):
+		restart_requested.emit()
+		get_viewport().set_input_as_handled()