Release v0.2.13: colorize clap help output

Clap 4 made help styling opt-in; without `styles = ...` the help text
renders as plain bold-less monochrome. Added a Styles block matching
uvr's runtime palette: cyan headers/usage, magenta literal flags, yellow
placeholders. Renders only in TTY contexts (clap's anstream auto-disables
on pipes), so CI / scripted usage stays clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: nbafrank

Cargo.lock

@@ -3,7 +3,7 @@ members = ["crates/uvr", "crates/uvr-core"]
 resolver = "2"
 
 [workspace.package]
-version = "0.2.12"
+version = "0.2.13"
 edition = "2021"
 authors = ["uvr contributors"]
 license = "MIT"

Cargo.toml

@@ -1,16 +1,28 @@
 use std::path::PathBuf;
 
+use clap::builder::styling;
 use clap::{Args, Parser, Subcommand};
 use clap_complete::Shell;
 
 use crate::commands::export::ExportFormat;
 
+/// Match the runtime palette: cyan accents for headers/usage, magenta for
+/// literal flag names, yellow for placeholders. Keeps `--help` visually of
+/// a piece with the rest of uvr's output. Clap 4 made help styling opt-in,
+/// so without this block the help text renders flat.
+const HELP_STYLES: styling::Styles = styling::Styles::styled()
+    .header(styling::AnsiColor::Cyan.on_default().bold())
+    .usage(styling::AnsiColor::Cyan.on_default().bold())
+    .literal(styling::AnsiColor::Magenta.on_default().bold())
+    .placeholder(styling::AnsiColor::Yellow.on_default());
+
 #[derive(Debug, Parser)]
 #[command(
     name = "uvr",
     version,
     about = "Fast, reproducible R package management",
     long_about = None,
+    styles = HELP_STYLES,
 )]
 pub struct Cli {
     /// Enable verbose output