Add Chain 138 mirror tokens and gold unit metadata

backend/api/rest/config/metamask/DUAL_CHAIN_TOKEN_LIST.tokenlist.json

@@ -3,9 +3,9 @@
   "version": {
     "major": 1,
     "minor": 3,
-    "patch": 0
+    "patch": 2
   },
-  "timestamp": "2026-02-28T00:00:00.000Z",
+  "timestamp": "2026-03-26T09:17:26.866Z",
   "logoURI": "https://ipfs.io/ipfs/Qma3FKtLce9MjgJgWbtyCxBiPjJ6xi8jGWUSKNS5Jc2ong",
   "tokens": [
     {
@@ -83,6 +83,30 @@
         "compliant"
       ]
     },
+    {
+      "chainId": 138,
+      "address": "0x004b63A7B5b0E06f6bB6adb4a5F9f590BF3182D1",
+      "name": "Tether USD (Official Mirror)",
+      "symbol": "USDT",
+      "decimals": 6,
+      "logoURI": "https://raw.githubusercontent.com/trustwallet/assets/master/blockchains/ethereum/assets/0xdAC17F958D2ee523a2206206994597C13D831ec7/logo.png",
+      "tags": [
+        "stablecoin",
+        "defi"
+      ]
+    },
+    {
+      "chainId": 138,
+      "address": "0x71D6687F38b93CCad569Fa6352c876eea967201b",
+      "name": "USD Coin (Official Mirror)",
+      "symbol": "USDC",
+      "decimals": 6,
+      "logoURI": "https://raw.githubusercontent.com/trustwallet/assets/master/blockchains/ethereum/assets/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48/logo.png",
+      "tags": [
+        "stablecoin",
+        "defi"
+      ]
+    },
     {
       "chainId": 138,
       "address": "0x8085961F9cF02b4d800A3c6d386D31da4B34266a",
@@ -197,7 +221,11 @@
       "tags": [
         "defi",
         "compliant"
-      ]
+      ],
+      "extensions": {
+        "unitOfAccount": "troy_ounce",
+        "unitDescription": "1 full token (10^decimals base units) = 1 troy oz fine gold"
+      }
     },
     {
       "chainId": 138,
@@ -209,7 +237,11 @@
       "tags": [
         "defi",
         "compliant"
-      ]
+      ],
+      "extensions": {
+        "unitOfAccount": "troy_ounce",
+        "unitDescription": "1 full token (10^decimals base units) = 1 troy oz fine gold"
+      }
     },
     {
       "chainId": 1,

backend/config/metamask/DUAL_CHAIN_TOKEN_LIST.tokenlist.json

@@ -3,9 +3,9 @@
   "version": {
     "major": 1,
     "minor": 2,
-    "patch": 0
+    "patch": 2
   },
-  "timestamp": "2026-02-28T00:00:00.000Z",
+  "timestamp": "2026-03-26T09:17:26.869Z",
   "logoURI": "https://ipfs.io/ipfs/Qma3FKtLce9MjgJgWbtyCxBiPjJ6xi8jGWUSKNS5Jc2ong",
   "tokens": [
     {
@@ -83,6 +83,30 @@
         "compliant"
       ]
     },
+    {
+      "chainId": 138,
+      "address": "0x004b63A7B5b0E06f6bB6adb4a5F9f590BF3182D1",
+      "name": "Tether USD (Official Mirror)",
+      "symbol": "USDT",
+      "decimals": 6,
+      "logoURI": "https://raw.githubusercontent.com/trustwallet/assets/master/blockchains/ethereum/assets/0xdAC17F958D2ee523a2206206994597C13D831ec7/logo.png",
+      "tags": [
+        "stablecoin",
+        "defi"
+      ]
+    },
+    {
+      "chainId": 138,
+      "address": "0x71D6687F38b93CCad569Fa6352c876eea967201b",
+      "name": "USD Coin (Official Mirror)",
+      "symbol": "USDC",
+      "decimals": 6,
+      "logoURI": "https://raw.githubusercontent.com/trustwallet/assets/master/blockchains/ethereum/assets/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48/logo.png",
+      "tags": [
+        "stablecoin",
+        "defi"
+      ]
+    },
     {
       "chainId": 138,
       "address": "0x8085961F9cF02b4d800A3c6d386D31da4B34266a",
@@ -197,7 +221,11 @@
       "tags": [
         "defi",
         "compliant"
-      ]
+      ],
+      "extensions": {
+        "unitOfAccount": "troy_ounce",
+        "unitDescription": "1 full token (10^decimals base units) = 1 troy oz fine gold"
+      }
     },
     {
       "chainId": 138,
@@ -209,7 +237,11 @@
       "tags": [
         "defi",
         "compliant"
-      ]
+      ],
+      "extensions": {
+        "unitOfAccount": "troy_ounce",
+        "unitDescription": "1 full token (10^decimals base units) = 1 troy oz fine gold"
+      }
     },
     {
       "chainId": 1,