chore: rebrand product as 省心推 and lock UI to zh-CN

Update server titles, web/desktop window/tray/document titles, login
copy, and electron build metadata to use the Chinese product name 省心推.
Drop the runtime locale switcher and en-US import — the app now ships
zh-CN only.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/admin-web/src/i18n/index.ts

@@ -1,44 +1,14 @@
 import { createI18n } from "vue-i18n";
 
-import enUS from "./messages/en-US";
 import zhCN from "./messages/zh-CN";
 
-export const LOCALE_STORAGE_KEY = "geo.admin.locale";
-export const SUPPORTED_LOCALES = ["zh-CN", "en-US"] as const;
-
-export type AppLocale = (typeof SUPPORTED_LOCALES)[number];
-
-function resolveLocale(): AppLocale {
-  if (typeof window === "undefined") {
-    return "zh-CN";
-  }
-
-  const stored = window.localStorage.getItem(LOCALE_STORAGE_KEY);
-  if (stored && SUPPORTED_LOCALES.includes(stored as AppLocale)) {
-    return stored as AppLocale;
-  }
-
-  const browserLocale = window.navigator.language;
-  if (browserLocale.startsWith("zh")) {
-    return "zh-CN";
-  }
-
-  return "en-US";
-}
+const APP_LOCALE = "zh-CN";
 
 export const i18n = createI18n({
   legacy: false,
-  locale: resolveLocale(),
-  fallbackLocale: "en-US",
+  locale: APP_LOCALE,
+  fallbackLocale: APP_LOCALE,
   messages: {
     "zh-CN": zhCN,
-    "en-US": enUS,
   },
 });
-
-export function setAppLocale(locale: AppLocale): void {
-  i18n.global.locale.value = locale;
-  if (typeof window !== "undefined") {
-    window.localStorage.setItem(LOCALE_STORAGE_KEY, locale);
-  }
-}

apps/admin-web/src/i18n/messages/zh-CN.ts

@@ -1,7 +1,7 @@
 const zhCN = {
   app: {
-    name: "GEO工具平台",
-    loginIntro: "面向企业的品牌资产管理与内容生产协作系统",
+    name: "省心推",
+    loginIntro: "面向企业和个人的品牌资产管理与内容生产协作系统",
   },
   locale: {
     "zh-CN": "中文简体",
@@ -153,7 +153,7 @@ const zhCN = {
   route: {
     login: {
       title: "欢迎回来",
-      description: "使用真实租户账号登录 GEO 工具平台。",
+      description: "登录省心推，开启品牌内容创作之旅",
     },
     workspace: {
       title: "工作台",