fix: resolve compilation errors by adding missing ErrorKind import and removing unused imports

Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>

src/modes/common.rs

@@ -3,7 +3,6 @@ use crate::compression_engine::CompressionType;
 use crate::meta_plugin::MetaPluginType;
 use clap::Command;
 use clap::error::ErrorKind;
-use humansize::{BINARY, FormatSizeOptions};
 use log::debug;
 use prettytable::format::TableFormat;
 use regex::Regex;