fix: remove unused imports and fix test stdin handling

Co-authored-by: aider (openai/andrew.openrouter.qwen.qwen3-coder) <aider@aider.chat>

src/modes/status.rs

@@ -8,9 +8,7 @@ use crate::compression_engine::COMPRESSION_PROGRAMS;
 use crate::compression_engine::CompressionType;
 use crate::compression_engine::program::CompressionEngineProgram;
 
-use prettytable::format::TableFormat;
 use crate::modes::common::get_format_box_chars_no_border_line_separator;
-use prettytable::format::consts::FORMAT_NO_BORDER_LINE_SEPARATOR;
 use prettytable::color;
 use prettytable::row;
 use prettytable::{Attr, Cell, Row, Table};