Wagmi error: r.connector.getChainId is not a function

### Describe the problem you discovered

Error in grafana

```
[{"timestamp":"2024-10-29T23:37:06.645","message":"null - r.connector.getChainId is not a function - null - null - {}","level":"LogLevel.error","stacktrace":"\n at Object.e (https://bridge.archethic.net/main.dart.js:3521:19)\n at https://bridge.archethic.net/main.dart.js:38548:9\n at br8.a (https://bridge.archethic.net/main.dart.js:4946:63)\n at br8.$2 (https://bridge.archethic.net/main.dart.js:51568:14)\n at bpC.$2 (https://bridge.archethic.net/main.dart.js:51565:16)\n at ZD.AS (https://bridge.archethic.net/main.dart.js:52774:35)\n at o8.aUB (https://bridge.archethic.net/main.dart.js:51876:18)\n at bgp.$0 (https://bridge.archethic.net/main.dart.js:52025:37)\n at Object.L_ (https://bridge.archethic.net/main.dart.js:5104:78)\n at an.kT (https://bridge.archethic.net/main.dart.js:51952:3)","name":"EVMBridgeProcessMixin - EVMHTLCERC - approveChargeableHTLC"},{"timestamp":"2024-10-29T23:37:06.646","message":"e Failure.other(cause: null, stack: null)","level":"LogLevel.error","stacktrace":"\n at Object.e (https://bridge.archethic.net/main.dart.js:3521:19)\n at https://bridge.archethic.net/main.dart.js:61174:9\n at br8.a (https://bridge.archethic.net/main.dart.js:4946:63)\n at br8.$2 (https://bridge.archethic.net/main.dart.js:51568:14)\n at bpC.$2 (https://bridge.archethic.net/main.dart.js:51565:16)\n at ZD.AS (https://bridge.archethic.net/main.dart.js:52774:35)\n at o8.aUB (https://bridge.archethic.net/main.dart.js:51876:18)\n at bgp.$0 (https://bridge.archethic.net/main.dart.js:52025:37)\n at Object.L_ (https://bridge.archethic.net/main.dart.js:5104:78)\n at an.kT (https://bridge.archethic.net/main.dart.js:51952:3)","name":"EVMHTLCERC - approveChargeableHTLC"}]
```

### Describe the solution you'd like

_No response_

### Epic

_No response_

Start with the EVMBridgeProcessMixin and EVMHTLCERC approveChargeableHTLC entry points referenced in the Grafana error, then trace the connector call behind the compiled main.dart.js stack. Reproduce the approval flow and identify why the connector lacks getChainId. Done means approveChargeableHTLC completes without this error and the failure is covered by the relevant test or verification flow.

Written by the indexing model from the issue text.