Use the radio and wand mockups behind their forms

Draw radio_report/emergency_radio behind a transparent, padded form and switch
the backdrop with the call type. The wand HUD popup now shows wand_screening
behind its text while open. Both covers use the mockup panel bounds so baked-in
controls stay hidden. Headless 226/226 verified in a clean HEAD worktree.

src/game/ui/hud.gd

@@ -5,6 +5,7 @@ extends CanvasLayer
 
 const Rules := preload("res://src/core/rules.gd")
 const Strings := preload("res://src/core/strings.gd")
+const UiArt := preload("res://src/game/ui/art.gd")
 const T_VIGNETTE := preload("res://assets/textures/ai/game_ready/vignette.png")
 const T_ICON_FLASH := preload("res://assets/textures/ai/game_ready/icons/flashlight_on.png")
 const T_ICON_DOOR := preload("res://assets/textures/ai/game_ready/icons/door_locked.png")
@@ -51,6 +52,8 @@ var _controls_label: Label
 var _debug_enabled := false
 var _log_lines: Array[String] = []
 var _cam_overlay: Control = null
+var _wand_art_layer: Control = null
+var _wand_art := UiArt.new()
 var _body_camera_on := false
 var _font_scale := 1.0
 var _base_font_sizes: Dictionary = {}
@@ -235,12 +238,33 @@ func _init() -> void:
 	inspect_center.add_child(inspect_panel)
 
 	# --- wand screening panel (popup center) ---
+	_wand_art_layer = Control.new()
+	_wand_art_layer.name = "WandArt"
+	_wand_art_layer.set_anchors_preset(Control.PRESET_FULL_RECT)
+	_wand_art_layer.mouse_filter = Control.MOUSE_FILTER_IGNORE
+	_wand_art_layer.visible = false
+	add_child(_wand_art_layer)
+	if not _wand_art.add_screen_backdrop(_wand_art_layer, "wand_screening",
+			Rect2(0.236, 0.094, 0.453, 0.884)):
+		var wand_dim := ColorRect.new()
+		wand_dim.color = Color(0, 0, 0, 0.55)
+		wand_dim.set_anchors_preset(Control.PRESET_FULL_RECT)
+		wand_dim.mouse_filter = Control.MOUSE_FILTER_IGNORE
+		_wand_art_layer.add_child(wand_dim)
 	var wand_center := CenterContainer.new()
 	wand_center.set_anchors_preset(Control.PRESET_FULL_RECT)
 	wand_center.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	add_child(wand_center)
 	wand_panel = PanelContainer.new()
 	wand_panel.visible = false
+	wand_panel.custom_minimum_size = Vector2(440, 0)
+	var wand_style := StyleBoxFlat.new()
+	wand_style.bg_color = Color(0, 0, 0, 0)
+	wand_style.content_margin_left = 26
+	wand_style.content_margin_right = 26
+	wand_style.content_margin_top = 18
+	wand_style.content_margin_bottom = 18
+	wand_panel.add_theme_stylebox_override("panel", wand_style)
 	var wvbox := VBoxContainer.new()
 	wand_panel.add_child(wvbox)
 	wand_text = Label.new()
@@ -526,6 +550,10 @@ func show_wand(controller: Object, result: Dictionary) -> void:
 		lines.append("No alert. The guest appears clear.")
 	wand_meta.text = "\n".join(lines)
 	wand_panel.visible = true
+	if _wand_art_layer:
+		_wand_art_layer.visible = true
 
 func hide_wand() -> void:
 	wand_panel.visible = false
+	if _wand_art_layer:
+		_wand_art_layer.visible = false