Remove unused Structure Sprites setting

The structureSprites toggle was only read by the toggle UIs themselves —
no rendering code ever consulted it. Drops the getter/setter from
UserSettings, both toggle rows (SettingsModal + UserSettingModal), and
the en.json keys. Other-language entries are left for Crowdin to reap.

resources/lang/en.json

@@ -800,8 +800,6 @@
     "alert_frame_desc": "Toggle the alert frame. When enabled, the frame will be displayed when you are betrayed or attacked over land.",
     "special_effects_label": "Special effects",
     "special_effects_desc": "Toggle special effects. Deactivate to improve performances",
-    "structure_sprites_label": "Structure Sprites",
-    "structure_sprites_desc": "Toggle structure sprites",
     "cursor_cost_label_label": "Cursor Build Cost",
     "cursor_cost_label_desc": "Show a cost pill under the build cursor icon",
     "anonymous_names_label": "Hidden Names",

src/client/UserSettingModal.ts

@@ -230,15 +230,6 @@ export class UserSettingModal extends BaseModal {
     );
   }
 
-  private toggleStructureSprites() {
-    this.userSettings.toggleStructureSprites();
-
-    console.log(
-      "🏠 Structure sprites:",
-      this.userSettings.structureSprites() ? "ON" : "OFF",
-    );
-  }
-
   private toggleCursorCostLabel() {
     this.userSettings.toggleCursorCostLabel();
 
@@ -787,15 +778,6 @@ export class UserSettingModal extends BaseModal {
         @change=${this.toggleFxLayer}
       ></setting-toggle>
 
-      <!-- 🏠 Structure Sprites -->
-      <setting-toggle
-        label="${translateText("user_setting.structure_sprites_label")}"
-        description="${translateText("user_setting.structure_sprites_desc")}"
-        id="structure_sprites-toggle"
-        .checked=${this.userSettings.structureSprites()}
-        @change=${this.toggleStructureSprites}
-      ></setting-toggle>
-
       <!-- 💰 Cursor Price Pill -->
       <setting-toggle
         label="${translateText("user_setting.cursor_cost_label_label")}"

src/client/hud/layers/SettingsModal.ts

@@ -17,7 +17,6 @@ import {
   SetSoundEffectsVolumeEvent,
 } from "../../sound/Sounds";
 import { ShowGraphicsSettingsModalEvent } from "./GraphicsSettingsModal";
-const structureIcon = assetUrl("images/CityIconWhite.svg");
 const cursorPriceIcon = assetUrl("images/CursorPriceIconWhite.svg");
 const darkModeIcon = assetUrl("images/DarkModeIconWhite.svg");
 const emojiIcon = assetUrl("images/EmojiIconWhite.svg");
@@ -133,11 +132,6 @@ export class SettingsModal extends LitElement implements Controller {
     this.requestUpdate();
   }
 
-  private onToggleStructureSpritesButtonClick() {
-    this.userSettings.toggleStructureSprites();
-    this.requestUpdate();
-  }
-
   private onToggleSpecialEffectsButtonClick() {
     this.userSettings.toggleFxLayer();
     this.requestUpdate();
@@ -410,31 +404,6 @@ export class SettingsModal extends LitElement implements Controller {
               </div>
             </button>
 
-            <button
-              class="flex gap-3 items-center w-full text-left p-3 hover:bg-slate-700 rounded-sm text-white transition-colors"
-              @click="${this.onToggleStructureSpritesButtonClick}"
-            >
-              <img
-                src=${structureIcon}
-                alt="structureSprites"
-                width="20"
-                height="20"
-              />
-              <div class="flex-1">
-                <div class="font-medium">
-                  ${translateText("user_setting.structure_sprites_label")}
-                </div>
-                <div class="text-sm text-slate-400">
-                  ${translateText("user_setting.structure_sprites_desc")}
-                </div>
-              </div>
-              <div class="text-sm text-slate-400">
-                ${this.userSettings.structureSprites()
-                  ? translateText("user_setting.on")
-                  : translateText("user_setting.off")}
-              </div>
-            </button>
-
             <button
               class="flex gap-3 items-center w-full text-left p-3 hover:bg-slate-700 rounded-sm text-white transition-colors"
               @click="${this.onToggleAttackingTroopsOverlayButtonClick}"

src/core/game/UserSettings.ts

@@ -158,10 +158,6 @@ export class UserSettings {
     return this.getBool("settings.specialEffects", true);
   }
 
-  structureSprites() {
-    return this.getBool("settings.structureSprites", true);
-  }
-
   darkMode() {
     return this.getBool(DARK_MODE_KEY, false);
   }
@@ -227,10 +223,6 @@ export class UserSettings {
     this.setBool("settings.specialEffects", !this.fxLayer());
   }
 
-  toggleStructureSprites() {
-    this.setBool("settings.structureSprites", !this.structureSprites());
-  }
-
   toggleCursorCostLabel() {
     this.setBool("settings.cursorCostLabel", !this.cursorCostLabel());
   }