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/en-US.json

@@ -80,8 +80,6 @@
   "somethingWentWrong": "Something went wrong",
   "subscription": {
     "title": "Subscription info",
-    "subId": "Subscription ID",
-    "email": "Email",
     "status": "Status",
     "downloaded": "Downloaded",
     "uploaded": "Uploaded",
@@ -93,7 +91,21 @@
     "unlimited": "Unlimited",
     "noExpiry": "No expiry",
     "copyAllConfigs": "Copy All Configs",
-    "copyAllConfigsCopied": "All configs copied"
+    "copyAllConfigsCopied": "All configs copied",
+    "daysLeft": "Days left",
+    "expired": "Expired",
+    "depleted": "Data used up",
+    "ofTotal": "of {total}",
+    "tabLinks": "Subscription",
+    "tabApps": "Apps",
+    "tabConfigs": "Configs",
+    "scanTitle": "Scan with your phone",
+    "scanHint": "Scan this code in your VPN app to add the subscription without copying the link.",
+    "updateInterval": "Auto-updates every {hours} hours",
+    "support": "Support",
+    "qrTitle": "Scan. Import. Connect.",
+    "qrHint": "Scan with your client app. Keep this code private.",
+    "saveQr": "Save QR"
   },
   "menu": {
     "theme": "Theme",