fix(theme): drop redundant const preloads shadowing global class_names

palette.gd / theme_keys.gd already declare `class_name`, so `const Palette =
preload(...)` in every consumer shadowed the global class and emitted 4
editor errors ("has the same name as a global class"). Reference the global
class_names directly. Editor reload now clean; suite 125/125; runtime probe
still builds all 75 showcase nodes with the theme applied.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

client/scripts/theme/build_game_theme.gd

@@ -13,8 +13,6 @@ extends SceneTree
 ## — so this is safe to call from a test without side effects.
 ## §2: presentation.
 
-const Palette = preload("res://scripts/theme/palette.gd")
-const ThemeKeys = preload("res://scripts/theme/theme_keys.gd")
 
 const OUT := "res://assets/theme/game_theme.tres"
 const SERIF := "res://assets/theme/fonts/EBGaramond-VariableFont_wght.ttf"

client/scripts/theme/surfaces/dark_bay.gd

@@ -4,7 +4,6 @@ extends Panel
 ## Uniforms are set at runtime from Palette (deliberate deviation from spec §5.4's
 ## "baked into the .tscn/material" approach) — keeps Palette the single source of
 ## truth at the cost of an editor preview; the surface renders once the scene runs.
-const Palette = preload("res://scripts/theme/palette.gd")
 
 
 func _ready() -> void:

client/scripts/theme/surfaces/parchment_panel.gd

@@ -4,7 +4,6 @@ extends Panel
 ## Uniforms are set at runtime from Palette (deliberate deviation from spec §5.4's
 ## "baked into the .tscn/material" approach) — keeps Palette the single source of
 ## truth at the cost of an editor preview; the surface renders once the scene runs.
-const Palette = preload("res://scripts/theme/palette.gd")
 
 
 func _ready() -> void:

client/scripts/theme/theme_showcase.gd

@@ -2,8 +2,6 @@
 extends Control
 ## The eyeball proof for the shared Theme (spec §7). Builds every token, stylebox,
 ## font, surface, and bar on one scrollable screen. No AI, no state. §2: presentation.
-const Palette = preload("res://scripts/theme/palette.gd")
-const ThemeKeys = preload("res://scripts/theme/theme_keys.gd")
 const GAME_THEME := "res://assets/theme/game_theme.tres"
 const SERIF_ITALIC := "res://assets/theme/fonts/EBGaramond-Italic-VariableFont_wght.ttf"
 

client/tests/unit/test_palette.gd

@@ -1,7 +1,5 @@
 extends "res://addons/gut/test.gd"
 
-const Palette = preload("res://scripts/theme/palette.gd")
-
 
 func test_core_tokens_are_colors():
 	assert_true(Palette.BLOOD is Color)

client/tests/unit/test_theme_resource.gd

@@ -1,7 +1,6 @@
 # client/tests/unit/test_theme_resource.gd
 extends "res://addons/gut/test.gd"
 
-const ThemeKeys = preload("res://scripts/theme/theme_keys.gd")
 const Builder = preload("res://scripts/theme/build_game_theme.gd")
 const THEME_PATH := "res://assets/theme/game_theme.tres"