feat(frontend): display gas unit as nDOS instead of Gwei

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: JOY

docker-compose/envs/common-frontend.env

@@ -22,6 +22,7 @@ NEXT_PUBLIC_NETWORK_ID=7979
 NEXT_PUBLIC_NETWORK_RPC_URL=https://main.doschain.com
 NEXT_PUBLIC_NETWORK_CURRENCY_NAME=DOS
 NEXT_PUBLIC_NETWORK_CURRENCY_WEI_NAME=wei
+NEXT_PUBLIC_NETWORK_CURRENCY_GWEI_NAME=nDOS
 NEXT_PUBLIC_NETWORK_CURRENCY_SYMBOL=DOS
 NEXT_PUBLIC_NETWORK_CURRENCY_DECIMALS=18
 NEXT_PUBLIC_NETWORK_VERIFICATION_TYPE=validation
@@ -109,7 +110,7 @@ NEXT_PUBLIC_IS_ACCOUNT_SUPPORTED=true
 # FEATURE: GAS TRACKER
 # =============================================================================
 NEXT_PUBLIC_GAS_TRACKER_ENABLED=true
-NEXT_PUBLIC_GAS_TRACKER_UNITS=['gwei']
+NEXT_PUBLIC_GAS_TRACKER_UNITS=['nDOS']
 
 # =============================================================================
 # FEATURE: ADVANCED FILTER