release: bump version to 0.25.3

frontend/public/earth/js/brand.js

@@ -0,0 +1,55 @@
+const BRANDS = {
+  zh: {
+    ariaLabel: "智能星球计划品牌标识",
+    titleAlt: "智能星球计划",
+    titleSrc: "assets/brand/title-zh.png",
+    subtitle: "现实层宇宙全息感知系统",
+    description: "卫星 · 海底光缆 · 算力基础设施",
+  },
+  en: {
+    ariaLabel: "Intelligent Planet Program brand banner",
+    titleAlt: "Intelligent Planet Program",
+    titleSrc: "assets/brand/title-en.png",
+    subtitle: "Physical-Universe Holography",
+    description: "Satellites · Cables · Compute Infra",
+  },
+};
+
+function getBrandConfig(variant = "zh") {
+  return BRANDS[variant] ?? BRANDS.zh;
+}
+
+export function renderBrand(variant = "zh") {
+  const config = getBrandConfig(variant);
+
+  return `
+    <div class="earth-brand earth-brand--${variant}" aria-label="${config.ariaLabel}">
+      <img
+        class="earth-brand__logo"
+        src="assets/brand/earth-logo.png"
+        alt=""
+        aria-hidden="true"
+      >
+      <div class="earth-brand__copy">
+        <img
+          class="earth-brand__title"
+          src="${config.titleSrc}"
+          alt="${config.titleAlt}"
+        >
+        <div class="earth-brand__meta">
+          <span class="earth-brand__subtitle">${config.subtitle}</span>
+          <span class="earth-brand__description">${config.description}</span>
+        </div>
+      </div>
+    </div>
+  `.trim();
+}
+
+export function mountBrand(target, variant = "zh") {
+  if (!target) return;
+  target.innerHTML = renderBrand(variant);
+}
+
+export function getBrandVariants() {
+  return Object.keys(BRANDS);
+}

frontend/public/earth/js/constants.js

@@ -17,6 +17,7 @@ export const HUD_CONFIG = {
   scaleReferenceHeight: 1080,
   minScale: 0.7,
   maxScale: 1,
+  brandLanguage: "zh",
 };
 
 // Earth coordinate constants

frontend/public/earth/js/main.js

@@ -123,6 +123,7 @@ import {
   refreshLegend,
   setLegendItems,
 } from "./legend.js";
+import { mountBrand } from "./brand.js";
 
 export let scene;
 export let camera;
@@ -853,6 +854,11 @@ export function init() {
   initialized = true;
   simplex = createNoise3D();
   updateHudScale();
+  const brandRoot = document.getElementById("brand-root");
+  mountBrand(
+    brandRoot,
+    HUD_CONFIG.brandLanguage || "zh",
+  );
 
   scene = new THREE.Scene();
   camera = new THREE.PerspectiveCamera(