Fix setFilter RPC response similar to loadFile

[coderabbitai]

Description

The RPC mechanism has been refactored in PR #224, which fixed the LOAD_FILE response. However, the SET_FILTER functionality was not addressed in the same PR.

Expected behavior

The setFilter RPC should return appropriate response data, similar to how loadFile was fixed.

Related Issues

• Refactor to decouple page loading from LOAD_FILE and SET_FILTER requests #222: Original issue discussing the need to decouple page loading from LOAD_FILE and SET_FILTER requests
• refactor: Replace StateContextProvider with Zustand for state management (resolves #168, resolves #211). #224: PR that refactored the RPC mechanism but only fixed loadFile

[hoophalab]

We should remove LogFileManagerProxy and let the renderer functions call LogFileManager directly, given that RPC provides us with a great flexibility of communicating between workers.