#315 🎇 Happy Chinese New Year!

[Copilot]

During CNY 2026 (Feb 15-23 UTC+8), show a festival notification and temporarily unlock RMP_CLOUD for all logged-in users.

Changes

• src/util/cny-2026.ts — Network time-based period checker using external time servers (worldtimeapi.org, timeapi.io). Returns epoch on failure to prevent local clock manipulation from granting free access.
• src/components/app-root.tsx — Two new effects:
  • Show translated CNY notification once per session (only during promotional period)
  • Enable RMP_CLOUD subscription for logged-in users, re-checked every 15 minutes
• Translation files (en, zh-Hans, zh-Hant, ja, ko) — Added happyChineseNewYear key with localized messages
• src/util/cny-2026.test.ts — Period boundary tests, time server response parsing, fallback behavior

Subscription unlock approach

// Sets RMP_CLOUD expiry to match the CNY period end
dispatch(setActiveSubscriptions({
    ...activeSubscriptions,
    RMP_CLOUD: '2026-02-23T15:59:59Z',
}));

ActiveSubscriptions.RMP_CLOUD uses DateTimeString (not boolean as in the reference project), so the promotion sets it to the period end timestamp.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Happy Chinese New Year 🎇</issue_title>
<issue_description>今年，在过年的特殊期间，我希望一部分原先需要订阅的功能限时免费开放给所有登录用户

需要在首页添加活动通知，别忘了添加各语言欢度春节的翻译

参考以下代码实现逻辑，注意这是另一个项目的修改，不能直接套用，但是关键的alert使用和翻译可以参考

diff --git a/src/components/app-root.tsx b/src/components/app-root.tsx
index b996e168..995b0b20 100644
--- a/src/components/app-root.tsx
+++ b/src/components/app-root.tsx
@@ -5,9 +5,7 @@ import React from 'react';
 import { useTranslation } from 'react-i18next';
 import { LocalStorageKey } from '../constants/constants';
 import { useRootDispatch, useRootSelector } from '../redux';
-import { setActiveSubscriptions } from '../redux/account/account-slice';
-import { closePaletteAppClip, onPaletteAppClipEmit, setGlobalAlert } from '../redux/runtime/runtime-slice';
-import { checkCNY2026Period, CNY_CHECK_INTERVAL } from '../util/cny-2026';
+import { closePaletteAppClip, onPaletteAppClipEmit } from '../redux/runtime/runtime-slice';
 
 const PageHeader = React.lazy(() => import('./page-header/page-header'));
 const ToolsPanel = React.lazy(() => import('./panels/tools/tools'));
@@ -20,12 +18,7 @@ export default function AppRoot() {
     const {
         paletteAppClip: { input },
     } = useRootSelector(state => state.runtime);
-    const accountState = useRootSelector(state => state.account.state);
-    const activeSubscriptions = useRootSelector(state => state.account.activeSubscriptions);
-    const {
-        t,
-        i18n: { language: lang },
-    } = useTranslation();
+    const { t } = useTranslation();
 
     const [isShowRMTMessage, setIsShowRMTMessage] = React.useState(false);
 
@@ -35,61 +28,6 @@ export default function AppRoot() {
         }
     }, []);
 
-    // CNY 2026 promotion: Check if we're in the promotional period and unlock RMP_CLOUD
-    const [cnyNotificationShown, setCnyNotificationShown] = React.useState(false);
-
-    // Show CNY notification once per session (always, regardless of login or period)
-    React.useEffect(() => {
-        if (!cnyNotificationShown) {
-            const timeoutId = setTimeout(() => {
-                dispatch(
-                    setGlobalAlert({
-                        status: 'warning',
-                        message: t('happyChineseNewYear'),
-                        url: `https://railmapgen.org/rmt-blog/${lang}/rmg-7th-newyear`,
-                    })
-                );
-                setCnyNotificationShown(true);
-            }, 1000);
-            return () => clearTimeout(timeoutId);
-        }
-    }, [cnyNotificationShown, dispatch, t]);
-
-    // Check CNY period and enable RMP_CLOUD for logged-in users
-    React.useEffect(() => {
-        let isActive = true;
-
-        const checkAndApplyCNYPromotion = async () => {
-            // Check login status inside to handle users logging in during use
-            const isLoggedIn = accountState === 'free' || accountState === 'subscriber';
-            if (!isLoggedIn || !isActive) return;
-
-            const isInPeriod = await checkCNY2026Period();
-            if (isInPeriod && isActive) {
-                // Enable RMP_CLOUD for all logged-in users during CNY period
-                if (!activeSubscriptions.RMP_CLOUD) {
-                    dispatch(
-                        setActiveSubscriptions({
-                            ...activeSubscriptions,
-                            RMP_CLOUD: true,
-                        })
-                    );
-                }
-            }
-        };
-
-        // Check immediately on mount
-        checkAndApplyCNYPromotion();
-
-        // Check every 15 minutes
-        const intervalId = setInterval(checkAndApplyCNYPromotion, CNY_CHECK_INTERVAL);
-
-        return () => {
-            isActive = false;
-            clearInterval(intervalId);
-        };
-    }, [accountState, activeSubscriptions, dispatch]);
-
     return (
         <RmgThemeProvider>
             <RmgWindow>
diff --git a/src/i18n/translations/en.json b/src/i18n/translations/en.json
index e0a1a62c..3e06fd79 100644
--- a/src/i18n/translations/en.json
+++ b/src/i18n/translations/en.json
@@ -950,7 +950,5 @@
         "flipDiagonal135": "Flip across 135° line"
     },
 
-    "localStorageQuotaExceeded": "Local storage limit reached. Unable to save new changes.",
-
-    "happyChineseNewYear": "🎇 Happy Chinese New Year 2026! Cloud features are free for all users during the festival period (Feb 15-23)."
+    "localStorageQuotaExceeded": "Local storage limit reached. Unable to save new changes."
 }
diff --git a/src/i18n/translations/ja.json b/src/i18n/translations/ja.json
index 78acedbb..3f45fc9e 100644
--- a/src/i18n/translations/ja.json
+++ b/src/i18n/translations/ja.json
@@ -951,7 +951,5 @@
         "flipDiagonal135": "135° 線で反転"
     },
 
-    "localStorageQuotaExceeded": "ローカルストレージの上限に達しました。新しい変更は保存できません。",
-
-    "happyChineseNewYear": "🎇 旧正月おめでとうございます！2026年春節期間中（2月15日～23日）、クラウド機能が全ユーザーに無料で開放されます。"
+    "loc...

</details>



<!-- START COPILOT CODING AGENT SUFFIX -->

- Fixes railmapgen/railmapgen.github.io#315

<!-- START COPILOT CODING AGENT TIPS -->
---

✨ Let Copilot coding agent [set things up for you](https://github.com/railmapgen/railmapgen.github.io/issues/new?title=✨+Set+up+Copilot+instructions&body=Configure%20instructions%20for%20this%20repository%20as%20documented%20in%20%5BBest%20practices%20for%20Copilot%20coding%20agent%20in%20your%20repository%5D%28https://gh.io/copilot-coding-agent-tips%29%2E%0A%0A%3COnboard%20this%20repo%3E&assignees=copilot) — coding agent works faster and does higher quality work when set up for your repo.

[thekingofcity]

LGTM