refactor: Move mode_diff to src/modes/diff.rs and update imports

src/main.rs

@@ -288,7 +288,7 @@ fn main() -> Result<(), Error> {
         KeepModes::Get => {
             crate::modes::get::mode_get(&mut cmd, args, ids, tags, &mut conn, data_path)?
         }
-        KeepModes::Diff => mode_diff(&mut cmd, args, ids, tags, &mut conn, data_path)?,
+        KeepModes::Diff => crate::modes::diff::mode_diff(&mut cmd, args, ids, tags, &mut conn, data_path)?,
         KeepModes::List => {
             crate::modes::list::mode_list(&mut cmd, args, ids, tags, &mut conn, data_path)?
         }
@@ -308,14 +308,6 @@ fn main() -> Result<(), Error> {
     Ok(())
 }
 
-fn mode_diff(
-    cmd: &mut clap::Command,
-    _args: Args, // Mark as unused if not needed directly
-    ids: &mut Vec<i64>,
-    tags: &mut Vec<String>,
-    conn: &mut Connection,
-    data_path: PathBuf,
-) -> Result<()> {
     if !tags.is_empty() {
         cmd.error(
             ErrorKind::InvalidValue,

src/modes/diff.rs

@@ -1,4 +1,7 @@
 use crate::compression::CompressionType;
+use crate::modes::common::format_size;
+use crate::modes::common::get_format_box_chars_no_border_line_separator;
+use crate::modes::common::ColumnType;
 use crate::db::{get_item, get_item_last, get_item_matching};
 use crate::modes::common::format_size;
 use std::path::PathBuf;