Use the pause and settings mockups as panel backdrops

Add UiArt.add_screen_backdrop() to place the reference art behind an opaque
panel, then wire the pause overlay and settings screen to it. Pause rows get
larger, rounded styles; settings widens to fit its expanded controls. Headless
226/226 verified in a clean HEAD worktree (the realism WIP currently editing
materials.gd remains unstaged).

TODO.md

@@ -46,7 +46,9 @@ and scene visuals with those mockups — verified with
 
 - [x] Add a central UI/scene art loader (e.g. `src/game/ui/art.gd`) that loads the mockup-derived images from the new runtime root, with a procedural fallback when a file is missing.
 - [x] Wire the start menu and venue selection screen to use the `start_menu` scene art.
-- [ ] Wire the pause overlay, settings, shift review, radial menu, and HUD chrome to their reference images.
+- [x] Wire the pause overlay to `pause_overlay` scene art (backdrop + opaque panel cover).
+- [x] Wire the settings panel to `settings_panel` art.
+- [ ] Wire the shift-review, radial-menu, and HUD chrome to their reference images.
 
 ### Align in-game visuals
 

src/game/ui/art.gd

@@ -49,5 +49,38 @@ func texture_at(relative_path: String) -> Texture2D:
 	_cache[path] = result
 	return result
 
+## Add a full-screen art backdrop plus an opaque panel covering the mockup's
+## baked-in controls. `panel_rect` is normalised (0..1) screen coordinates.
+## Returns false when the art is missing so the caller can keep its own backdrop.
+func add_screen_backdrop(parent: Control, art_name: String,
+		panel_rect: Rect2, panel_color: Color = Color(0.075, 0.08, 0.095, 1.0)) -> bool:
+	var texture := texture(art_name)
+	if texture == null or parent == null:
+		return false
+	var backdrop := TextureRect.new()
+	backdrop.name = "ScreenArt"
+	backdrop.texture = texture
+	backdrop.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
+	backdrop.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_COVERED
+	backdrop.set_anchors_preset(Control.PRESET_FULL_RECT)
+	backdrop.mouse_filter = Control.MOUSE_FILTER_IGNORE
+	parent.add_child(backdrop)
+	var panel := ColorRect.new()
+	panel.name = "ArtPanel"
+	panel.color = panel_color
+	panel.set_anchor(SIDE_LEFT, panel_rect.position.x)
+	panel.set_anchor(SIDE_TOP, panel_rect.position.y)
+	panel.set_anchor(SIDE_RIGHT, panel_rect.position.x + panel_rect.size.x)
+	panel.set_anchor(SIDE_BOTTOM, panel_rect.position.y + panel_rect.size.y)
+	panel.mouse_filter = Control.MOUSE_FILTER_IGNORE
+	parent.add_child(panel)
+	var dim := ColorRect.new()
+	dim.name = "ArtDim"
+	dim.color = Color(0.02, 0.03, 0.05, 0.16)
+	dim.set_anchors_preset(Control.PRESET_FULL_RECT)
+	dim.mouse_filter = Control.MOUSE_FILTER_IGNORE
+	parent.add_child(dim)
+	return true
+
 func clear_cache() -> void:
 	_cache.clear()

src/game/ui/pause_overlay.gd

@@ -9,6 +9,8 @@ signal restart_requested()
 signal settings_requested()
 signal quit_to_menu_requested()
 
+const UiArt := preload("res://src/game/ui/art.gd")
+
 var _root: Control = null
 var _resume_button: Button = null
 
@@ -24,6 +26,9 @@ func _build() -> void:
 	_root.mouse_filter = Control.MOUSE_FILTER_STOP
 	add_child(_root)
 
+	var art := UiArt.new()
+	if not art.add_screen_backdrop(_root, "pause_overlay",
+			Rect2(0.172, 0.097, 0.59, 0.813)):
 		var bg := ColorRect.new()
 		bg.color = Color(0.02, 0.03, 0.05, 0.82)
 		bg.set_anchors_preset(Control.PRESET_FULL_RECT)
@@ -60,7 +65,20 @@ func _add_button(parent: Control, text: String, node_name: String, cb: Callable)
 	var button := Button.new()
 	button.name = node_name
 	button.text = text
-	button.custom_minimum_size = Vector2(320, 44)
+	button.custom_minimum_size = Vector2(380, 52)
+	button.add_theme_font_size_override("font_size", 22)
+	var normal := StyleBoxFlat.new()
+	normal.bg_color = Color(0.115, 0.125, 0.15, 0.96)
+	normal.corner_radius_top_left = 12
+	normal.corner_radius_top_right = 12
+	normal.corner_radius_bottom_left = 12
+	normal.corner_radius_bottom_right = 12
+	var hover := normal.duplicate() as StyleBoxFlat
+	hover.bg_color = Color(0.16, 0.175, 0.21, 0.98)
+	button.add_theme_stylebox_override("normal", normal)
+	button.add_theme_stylebox_override("hover", hover)
+	button.add_theme_stylebox_override("focus", hover)
+	button.add_theme_stylebox_override("pressed", hover)
 	button.pressed.connect(cb)
 	parent.add_child(button)
 	return button

src/game/ui/settings_panel.gd

@@ -7,6 +7,7 @@ extends CanvasLayer
 ## and HUD as soon as the player confirms.
 
 const InputBindings := preload("res://src/core/input_bindings.gd")
+const UiArt := preload("res://src/game/ui/art.gd")
 
 signal applied(settings: Dictionary)
 signal closed()
@@ -39,6 +40,9 @@ func _build() -> void:
 	_root.mouse_filter = Control.MOUSE_FILTER_STOP
 	add_child(_root)
 
+	var art := UiArt.new()
+	if not art.add_screen_backdrop(_root, "settings_panel",
+			Rect2(0.117, 0.049, 0.703, 0.895)):
 		var bg := ColorRect.new()
 		bg.color = Color(0.02, 0.03, 0.05, 0.9)
 		bg.set_anchors_preset(Control.PRESET_FULL_RECT)
@@ -50,7 +54,7 @@ func _build() -> void:
 	_root.add_child(center)
 
 	var column := VBoxContainer.new()
-	column.custom_minimum_size = Vector2(420, 0)
+	column.custom_minimum_size = Vector2(640, 0)
 	column.add_theme_constant_override("separation", 12)
 	center.add_child(column)