fix(theme): showcase renders every §6 element (3rd surface, 3 variations, all fonts, labelled swatches)

- _surfaces(): add VignetteOverlay.tscn alongside ParchmentPanel/DarkBay,
  backed by a Palette.STEEL ColorRect so the dim is visibly rendering.
- _variations(): add ItemTileEmpty (next to filled ItemTile), ParchmentInset,
  and DarkPanel stylebox nodes.
- _fonts(): new section rendering default serif body, Accent
  (Architects Daughter), and Mono (JetBrains Mono) labels at real sizes.
- _swatches(): wrap each ColorRect in a VBoxContainer with a Mono caption
  Label naming its Palette const, per spec's "labelled swatches."

No raw hex / Color(...) literals introduced; all colour via Palette.*, all
styleboxes via ThemeKeys.* variation names.

client/scripts/theme/theme_showcase.gd

@@ -21,6 +21,7 @@ func _ready() -> void:
 	col.add_child(_heading("SHARED THEME — SHOWCASE"))
 	col.add_child(_swatches())
 	col.add_child(_variations())
+	col.add_child(_fonts())
 	col.add_child(_rarity())
 	col.add_child(_bars())
 	col.add_child(_surfaces())
@@ -36,13 +37,24 @@ func _heading(text: String) -> Label:
 func _swatches() -> Control:
 	var grid := GridContainer.new()
 	grid.columns = 8
-	for c in [Palette.STAGE_1, Palette.BAY_STRIPE_A, Palette.DARK_PANEL_70,
-			Palette.SHEET_TOP, Palette.PARCHMENT_CARD, Palette.BLOOD, Palette.GOLD,
-			Palette.STEEL, Palette.GREEN, Palette.INK_BODY, Palette.CREAM]:
+	var tokens := [
+		["STAGE_1", Palette.STAGE_1], ["BAY_STRIPE_A", Palette.BAY_STRIPE_A],
+		["DARK_PANEL_70", Palette.DARK_PANEL_70], ["SHEET_TOP", Palette.SHEET_TOP],
+		["PARCHMENT_CARD", Palette.PARCHMENT_CARD], ["BLOOD", Palette.BLOOD],
+		["GOLD", Palette.GOLD], ["STEEL", Palette.STEEL], ["GREEN", Palette.GREEN],
+		["INK_BODY", Palette.INK_BODY], ["CREAM", Palette.CREAM],
+	]
+	for entry in tokens:
+		var col := VBoxContainer.new()
 		var r := ColorRect.new()
-		r.color = c
+		r.color = entry[1]
 		r.custom_minimum_size = Vector2(120, 60)
-		grid.add_child(r)
+		col.add_child(r)
+		var caption := Label.new()
+		caption.text = entry[0]
+		caption.theme_type_variation = &"Mono"
+		col.add_child(caption)
+		grid.add_child(col)
 	return grid
 
 
@@ -58,9 +70,53 @@ func _variations() -> Control:
 	var card := PanelContainer.new(); card.theme_type_variation = ThemeKeys.PARCHMENT_CARD
 	card.custom_minimum_size = Vector2(160, 80)
 	row.add_child(card)
+
+	# Filled vs empty item tile, side by side for comparison.
+	var tile_filled := PanelContainer.new()
+	tile_filled.theme_type_variation = ThemeKeys.ITEM_TILE
+	tile_filled.custom_minimum_size = Vector2(64, 64)
+	row.add_child(tile_filled)
+	var tile_empty := PanelContainer.new()
+	tile_empty.theme_type_variation = ThemeKeys.ITEM_TILE_EMPTY
+	tile_empty.custom_minimum_size = Vector2(64, 64)
+	row.add_child(tile_empty)
+
+	var inset := PanelContainer.new()
+	inset.theme_type_variation = ThemeKeys.PARCHMENT_INSET
+	inset.custom_minimum_size = Vector2(160, 80)
+	row.add_child(inset)
+
+	var dark := PanelContainer.new()
+	dark.theme_type_variation = ThemeKeys.DARK_PANEL
+	dark.custom_minimum_size = Vector2(160, 80)
+	row.add_child(dark)
+
 	return row
 
 
+func _fonts() -> Control:
+	# All three bundled font families, at their real Theme sizes, plus the
+	# default serif body face (not otherwise shown elsewhere on this screen).
+	var col := VBoxContainer.new()
+	col.add_theme_constant_override("separation", 6)
+
+	var body := Label.new()
+	body.text = "The road to the Ashmarch is longer than the maps admit."
+	col.add_child(body)
+
+	var accent := Label.new()
+	accent.text = "Vexcca of the Ashmarch"
+	accent.theme_type_variation = &"Accent"
+	col.add_child(accent)
+
+	var mono := Label.new()
+	mono.text = "STR 14 · INITIATIVE +2 · AC 16"
+	mono.theme_type_variation = &"Mono"
+	col.add_child(mono)
+
+	return col
+
+
 func _rarity() -> Control:
 	var row := HBoxContainer.new()
 	for i in range(5):
@@ -94,4 +150,18 @@ func _surfaces() -> Control:
 		var s = load(path).instantiate()
 		s.custom_minimum_size = Vector2(600, 220)
 		row.add_child(s)
+
+	# VignetteOverlay draws a black-with-alpha dim; give it a mid-tone backing
+	# so the dim is visibly rendering rather than reading as empty space.
+	var vignette_slot := Control.new()
+	vignette_slot.custom_minimum_size = Vector2(600, 220)
+	var backing := ColorRect.new()
+	backing.color = Palette.STEEL
+	backing.set_anchors_preset(Control.PRESET_FULL_RECT)
+	vignette_slot.add_child(backing)
+	var vignette = load("res://scenes/theme/surfaces/VignetteOverlay.tscn").instantiate()
+	vignette.set_anchors_preset(Control.PRESET_FULL_RECT)
+	vignette_slot.add_child(vignette)
+	row.add_child(vignette_slot)
+
 	return row