Add Networks link to leftside navigator. Implement Networks UI listing the networks. <img width="325" height="132" alt="Image" src="https://github.com/user-attachments/assets/ffc7441e-06e1-4566-b0d0-3e6bd1ca8524" /> <img width="440" height="547" alt="Image" src="https://github.com/user-attachments/assets/9c9df52f-380a-489e-a699-01693461cd99" />
Add Networks link to leftside navigator. Implement Networks UI listing the networks.