chore: metamask networks, explorer SPA, nginx scripts; ignore Python cache

- Dual-chain / GRU deployment JSON sync
- Frontend explorer SPA + MetaMask components
- Scripts: nginx fixes, link deploy, local SPA serve helper
- Token icon chain-138.png; .gitignore __pycache__

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/api/rest/config/metamask/DUAL_CHAIN_NETWORKS.json

@@ -3,10 +3,10 @@
   "version": {"major": 1, "minor": 2, "patch": 0},
   "defaultChainId": 138,
   "explorerUrl": "https://explorer.d-bis.org",
-  "tokenListUrl": "https://explorer.d-bis.org/api/config/token-list",
+  "tokenListUrl": "https://explorer.d-bis.org/api/v1/report/token-list?chainId=138",
   "generatedBy": "DBIS Explorer",
   "chains": [
-    {"chainId":"0x8a","chainIdDecimal":138,"chainName":"DeFi Oracle Meta Mainnet","shortName":"dbis","rpcUrls":["https://rpc-http-pub.d-bis.org","https://rpc.d-bis.org","https://rpc2.d-bis.org","https://rpc.defi-oracle.io"],"nativeCurrency":{"name":"Ether","symbol":"ETH","decimals":18},"blockExplorerUrls":["https://explorer.d-bis.org","https://blockscout.defi-oracle.io"],"iconUrls":["https://raw.githubusercontent.com/ethereum/ethereum.org/main/static/images/eth-diamond-black.png"],"infoURL":"https://explorer.d-bis.org","explorerApiUrl":"https://explorer.d-bis.org/api/v2","testnet":false},
+    {"chainId":"0x8a","chainIdDecimal":138,"chainName":"DeFi Oracle Meta Mainnet","shortName":"dbis","rpcUrls":["https://rpc-http-pub.d-bis.org","https://rpc.d-bis.org","https://rpc2.d-bis.org","https://rpc.defi-oracle.io"],"nativeCurrency":{"name":"Ether","symbol":"ETH","decimals":18},"blockExplorerUrls":["https://explorer.d-bis.org","https://blockscout.defi-oracle.io"],"iconUrls":["https://explorer.d-bis.org/token-icons/chain-138.png","https://explorer.d-bis.org/api/v1/report/logo/chain-138","https://explorer.d-bis.org/favicon.ico"],"infoURL":"https://explorer.d-bis.org","explorerApiUrl":"https://explorer.d-bis.org/api/v2","testnet":false},
     {"chainId":"0x1","chainIdDecimal":1,"chainName":"Ethereum Mainnet","shortName":"eth","rpcUrls":["https://eth.llamarpc.com","https://rpc.ankr.com/eth","https://ethereum.publicnode.com","https://1rpc.io/eth"],"nativeCurrency":{"name":"Ether","symbol":"ETH","decimals":18},"blockExplorerUrls":["https://etherscan.io"],"iconUrls":["https://raw.githubusercontent.com/ethereum/ethereum.org/main/static/images/eth-diamond-black.png"],"infoURL":"https://ethereum.org","testnet":false},
     {"chainId":"0x9f2c4","chainIdDecimal":651940,"chainName":"ALL Mainnet","shortName":"all","rpcUrls":["https://mainnet-rpc.alltra.global"],"nativeCurrency":{"name":"Ether","symbol":"ETH","decimals":18},"blockExplorerUrls":["https://alltra.global"],"iconUrls":["https://raw.githubusercontent.com/ethereum/ethereum.org/main/static/images/eth-diamond-black.png"],"infoURL":"https://alltra.global","testnet":false},
     {"chainId":"0x19","chainIdDecimal":25,"chainName":"Cronos Mainnet","rpcUrls":["https://evm.cronos.org","https://cronos-rpc.publicnode.com"],"nativeCurrency":{"name":"CRO","symbol":"CRO","decimals":18},"blockExplorerUrls":["https://cronos.org/explorer"],"iconUrls":["https://ipfs.io/ipfs/Qma3FKtLce9MjgJgWbtyCxBiPjJ6xi8jGWUSKNS5Jc2ong"]},

backend/api/rest/config/metamask/GRU_V2_PUBLIC_DEPLOYMENT_STATUS.json

@@ -129,7 +129,7 @@
       "coveredSymbols": 10,
       "missingSymbols": []
     },
-    "note": "The public EVM cW token mesh is complete on the currently loaded 10-chain set, but Wemix remains a desired target without a cW suite in deployment-status.json."
+    "note": "The public EVM cW token mesh is aligned to the nine-chain promoted surface (Cronos excluded from that count); Wemix remains a desired target without a cW suite in deployment-status.json."
   },
   "transport": {
     "liveTransportAssets": [