feat: add announcement section to WelcomePage and localize announcement title

dashboard/src/i18n/locales/en-US/features/welcome.json

@@ -6,6 +6,9 @@
     "newYear": "Happy New Year!"
   },
   "subtitle": "You can complete the basic onboarding first. Platform and chat provider setup can both be skipped.",
+  "announcement": {
+    "title": "Announcement"
+  },
   "onboard": {
     "title": "Quick Onboarding",
     "subtitle": "Complete initialization directly on the welcome page.",

dashboard/src/i18n/locales/zh-CN/features/welcome.json

@@ -6,6 +6,9 @@
     "newYear": "新年快乐！"
   },
   "subtitle": "可以先完成基础引导，平台和对话提供商都支持稍后再配置。",
+  "announcement": {
+    "title": "公告"
+  },
   "onboard": {
     "title": "快速引导",
     "subtitle": "欢迎页可直接完成初始化。",

dashboard/src/views/WelcomePage.vue

@@ -116,6 +116,21 @@
           </v-card>
         </v-col>
       </v-row>
+
+      <v-row v-if="showAnnouncement" class="px-4 mb-4">
+        <v-col cols="12">
+          <v-card class="welcome-card pa-6" elevation="0" border>
+            <div class="mb-4 text-h3 font-weight-bold">
+              {{ tm('announcement.title') }}
+            </div>
+            <MarkdownRender
+              :content="welcomeAnnouncement"
+              :typewriter="false"
+              class="welcome-announcement-markdown markdown-content"
+            />
+          </v-card>
+        </v-col>
+      </v-row>
     </v-container>
 
     <AddNewPlatform v-model:show="showAddPlatformDialog" :metadata="platformMetadata" :config_data="platformConfigData"
@@ -129,12 +144,16 @@ import { computed, ref, watch, onMounted } from 'vue';
 import axios from 'axios';
 import AddNewPlatform from '@/components/platform/AddNewPlatform.vue';
 import ProviderConfigDialog from '@/components/chat/ProviderConfigDialog.vue';
-import { useModuleI18n } from '@/i18n/composables';
+import { useI18n, useModuleI18n } from '@/i18n/composables';
 import { useToast } from '@/utils/toast';
+import { MarkdownRender } from 'markstream-vue';
+import 'markstream-vue/index.css';
+import 'highlight.js/styles/github.css';
 
 type StepState = 'pending' | 'completed' | 'skipped';
 
 const { tm } = useModuleI18n('features/welcome');
+const { locale } = useI18n();
 const { success: showSuccess, error: showError } = useToast();
 
 const showAddPlatformDialog = ref(false);
@@ -148,6 +167,38 @@ const providerCountBeforeOpen = ref(0);
 
 const platformStepState = ref<StepState>('pending');
 const providerStepState = ref<StepState>('pending');
+const welcomeAnnouncementRaw = ref<unknown>(null);
+
+function resolveWelcomeAnnouncement(raw: unknown, currentLocale: string) {
+  if (typeof raw === 'string') {
+    return raw.trim();
+  }
+
+  if (!raw || typeof raw !== 'object' || Array.isArray(raw)) {
+    return '';
+  }
+
+  const localeMap = raw as Record<string, unknown>;
+  const normalized = currentLocale.replace('-', '_');
+  const preferredKeys =
+    normalized.startsWith('zh')
+      ? [normalized, 'zh_CN', 'zh-CN', 'zh', 'en_US', 'en-US', 'en']
+      : [normalized, 'en_US', 'en-US', 'en', 'zh_CN', 'zh-CN', 'zh'];
+
+  for (const key of preferredKeys) {
+    const value = localeMap[key];
+    if (typeof value === 'string' && value.trim().length > 0) {
+      return value.trim();
+    }
+  }
+
+  return '';
+}
+
+const welcomeAnnouncement = computed(() =>
+  resolveWelcomeAnnouncement(welcomeAnnouncementRaw.value, locale.value)
+);
+const showAnnouncement = computed(() => welcomeAnnouncement.value.length > 0);
 
 const springFestivalDates: Record<number, string> = {
   2025: '01-29',
@@ -285,7 +336,19 @@ async function syncDefaultConfigProviderIfNeeded() {
   showSuccess(tm('onboard.providerDefaultUpdated', { id: targetProviderId }));
 }
 
+async function loadWelcomeAnnouncement() {
+  try {
+    const res = await axios.get('https://cloud.astrbot.app/api/v1/announcement');
+    welcomeAnnouncementRaw.value = res?.data?.data?.notice?.welcome_page ?? null;
+  } catch (e) {
+    welcomeAnnouncementRaw.value = null;
+    console.error(e);
+  }
+}
+
 onMounted(async () => {
+  await loadWelcomeAnnouncement();
+
   try {
     await loadPlatformConfigBase();
     if ((platformConfigData.value.platform || []).length > 0) {
@@ -363,4 +426,8 @@ watch(showProviderDialog, async (visible, wasVisible) => {
 .welcome-card {
   border-radius: 16px;
 }
+
+.welcome-announcement-markdown {
+  line-height: 1.7;
+}
 </style>