Function upload_file_to_server 

pub async fn upload_file_to_server(
    local_file_path: String,
    user_id: String,
) -> Result<(), Box<dyn Error>>

Upload a local file to the server for syncing

This allows users to upload their files to the server so they can be accessed from other clients and their reading progress can be tracked online.

Arguments

• local_file_path - Path to the local file to upload
• user_id - User identifier

Returns

• Result<(), Box<dyn std::error::Error>> - Result indicating success or error