refactor: 优化跨标签会话同步、引入强类型安全JSON解析工具及Seller样式重构

frontend/src/views/admin/components/HomeAnnouncementsDialog.vue

@@ -4,6 +4,7 @@ import { ref, watch } from 'vue'
 
 import { defaultHomeAnnouncements, mergeHomeConfig } from '@/api/homeConfig'
 import { updateSystemConfig, type SystemConfig } from '@/api/systemConfigs'
+import { safeParseJSON } from '@/utils/json'
 
 const props = defineProps<{
   modelValue: boolean
@@ -31,12 +32,8 @@ watch(
 )
 
 function parseHomeAnnouncements(raw: string) {
-  try {
-    const parsed = raw.trim() ? JSON.parse(raw) : defaultHomeAnnouncements
-    return mergeHomeConfig({ announcements: Array.isArray(parsed) ? parsed : [] }).announcements
-  } catch {
-    return [...defaultHomeAnnouncements]
-  }
+  const parsed = safeParseJSON(raw, defaultHomeAnnouncements)
+  return mergeHomeConfig({ announcements: Array.isArray(parsed) ? parsed : [] }).announcements
 }
 
 function linesToItems(value: string) {