Add authenticated global economic calendar with Jin10 fallback

Collect macroeconomic releases, events and holidays through the official browser SDK with resumable history from 2025. Preserve evidence, revisions and observation times, and merge verified series with official fields taking priority.

Add category filters, field provenance, coverage and connection status. Verify calendar persistence and deployment recovery in isolated acceptance checks.

web/src/pages/settings/components/Jin10Settings.vue

@@ -14,6 +14,7 @@ const visible = ref(false)
 const busy = ref(false)
 const state = ref("idle")
 const failed = ref(false)
+const syncLabels = { awaiting_validation: "同步尚未就绪，账号连接不代表日历已完整收录", disconnected: "尚未连接", connecting: "正在验证日历连接", syncing: "正在同步日历", ready: "日历连接已验证，持续同步中", error: "日历同步失败，请查看下方原因" }
 let generation = 0
 let statusRequest = 0
 let timer: ReturnType<typeof setTimeout> | undefined
@@ -118,7 +119,13 @@ watch(visible, (value) => {
       </p>
       <p>全球宏观数据、重要事件和假期。官方同口径数据优先，金十补充缺项。</p>
       <p v-if="status.connected">
-        日历读取权限待核验；账号连接成功不代表日历同步已就绪。
+        {{ syncLabels[status.sync_state] }}
+      </p>
+      <p v-if="status.last_success_at">
+        最近成功：{{ status.last_success_at }}
+      </p>
+      <p v-if="status.history_next">
+        历史回补下一日期：{{ status.history_next }}（北京时间，2025-01-01 起）
       </p>
       <el-alert v-if="status.error" :title="status.error" type="warning" :closable="false" />
       <el-button type="primary" :loading="busy" @click="start">
@@ -127,6 +134,9 @@ watch(visible, (value) => {
       <el-button v-if="status.connected" @click="disconnect">
         断开连接
       </el-button>
+      <el-button @click="load">
+        刷新状态
+      </el-button>
     </template>
     <el-button v-if="failed" @click="load">
       重试