Feat/cs/multiline center

[ReagentX]

• Fix ScrollState::Centered doesn't contain multiline logic #118

[Copilot]

Pull Request Overview

This PR fixes issue #118 by enhancing how multiline messages are centered in the terminal UI.

• Adds get_rows_and_length to the length sanitizer to compute both rows needed and real length of ANSI-colored strings.
• Refactors reader logic: changes center_row to usize, uses the new sanitizer API, and implements a center-expanding window for multiline messages.
• Updates tests for the new API, resets scroll state in the highlight handler, and bumps the clap dependency version.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

File	Description
src/util/sanitizers.rs	Flattened imports, made get_real_length private, added get_rows_and_length, and updated tests.
src/communication/reader.rs	Changed center_row to usize, replaced manual row calculus with get_rows_and_length, and rewrote centered scroll logic.
src/communication/handlers/highlight.rs	Reset scroll_state to Free on clear.
Cargo.toml	Bumped clap from 4.5.38 to 4.5.39.

Comments suppressed due to low confidence (2)

src/util/sanitizers.rs:26

• The doc comment for get_rows_and_length explains calculating rows but doesn’t mention the returned tuple also contains the real length. Clarify that it returns (rows, length).

/// Given a string's real length and the terminal width, return the number of rows it would take to display the string.

src/util/sanitizers.rs:18

• The method get_real_length is no longer pub, but it's still invoked by your tests. Make it pub fn get_real_length or adjust visibility so tests can access it.

fn get_real_length(&self, content: &str) -> usize {