feat(sub): redesign the subscription page around usage, tabs and app imports

The info page was a long key/value table followed by every link and two
app dropdowns, and it rendered left-to-right even for Persian and Arabic.
It now leads with a usage ring, the remaining quota and a stats grid, and
splits the rest into Subscription / Apps / Configs tabs.

- Status tells expired, data-used-up and disabled apart instead of one
  "Inactive", replacing the hard-coded English expiry chip.
- The Apps tab keeps every Android and iOS app with its existing deep
  link, preselects the visitor's platform and adds Windows: Hiddify and
  Clash Verge Rev import directly, v2rayN copies the link.
- fa-IR and ar-EG render right-to-left; URLs, IDs and sizes stay LTR.
- The footer shows the support link and the client refresh interval, so
  subPageContext now carries subUpdates (also in ?format=info).
- Status, days-left and app deep-link logic lives in subPageModel.ts,
  with unit tests pinning the deep links the page already shipped.

internal/web/translation/ja-JP.json

@@ -80,7 +80,6 @@
   "somethingWentWrong": "エラーが発生しました",
   "subscription": {
     "title": "サブスクリプション情報",
-    "subId": "サブスクリプションID",
     "status": "ステータス",
     "downloaded": "ダウンロード",
     "uploaded": "アップロード",
@@ -93,7 +92,20 @@
     "noExpiry": "期限なし",
     "copyAllConfigs": "すべての設定をコピー",
     "copyAllConfigsCopied": "すべての設定をコピーしました",
-    "email": "メール"
+    "daysLeft": "残り日数",
+    "expired": "期限切れ",
+    "depleted": "データ上限到達",
+    "ofTotal": "/ {total}",
+    "tabLinks": "サブスクリプション",
+    "tabApps": "アプリ",
+    "tabConfigs": "設定",
+    "scanTitle": "スマートフォンでスキャン",
+    "scanHint": "VPN アプリでこのコードをスキャンすると、リンクをコピーせずにサブスクリプションを追加できます。",
+    "updateInterval": "{hours} 時間ごとに自動更新",
+    "support": "サポート",
+    "qrTitle": "スキャン。インポート。接続。",
+    "qrHint": "クライアントアプリでスキャンしてください。このコードは他人に見せないでください。",
+    "saveQr": "QR を保存"
   },
   "menu": {
     "theme": "テーマ",