Fix Polkadot staking, add USDT bridge, update dashboard card

- Restore staking module to Nova upstream (fix Polkadot ACTIVE/shimmer)
- Add USDT(DOT) <-> USDT(HEZ) bridge option to Buy/Sell screen
- Dashboard card: add telegram_welcome image, info text, Non-Citizen role
- Add non-citizen info text to all 12 locale files
- Simplify ComputationalCache (remove stale scope recreation)

common/src/main/res/values-pl/strings.xml

@@ -2057,6 +2057,7 @@
 
     <!-- Bridge Screen -->
     <string name="wallet_asset_bridge">Most DOT ↔ HEZ</string>
+    <string name="wallet_asset_bridge_usdt">Most USDT(DOT) ↔ USDT(HEZ)</string>
     <string name="bridge_title">Most DOT ↔ HEZ</string>
     <string name="bridge_you_send">Wysyłasz</string>
     <string name="bridge_you_receive">Otrzymasz (szacunkowo)</string>