The Tauri v2 IPC layer expects camelCase parameter names. The frontend
was sending cluster_type (snake_case), causing the deserialization
failure with error 'command add_proxmox_cluster missing required key
clusterType'.
Changed proxmoxClient.ts line 28 from:
cluster_type: clusterType
to:
clusterType
This aligns with the project's convention where all multi-word
parameters use camelCase (clusterId, nodeId, vmId, etc.).
Fixes the 'Failed to add remote' error when adding new Proxmox remotes.