fix: resolve CI failures (fmt + typos config for ratatui)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: minsoo-web

_typos.toml

@@ -0,0 +1,2 @@
+[default.extend-words]
+ratatui = "ratatui"

src/preview/mod.rs

@@ -123,9 +123,7 @@ pub fn select_theme_with_preview(
                 }
 
                 // Ctrl+C → return None (exit code 130 handled by caller)
-                if key.modifiers.contains(KeyModifiers::CONTROL)
-                    && key.code == KeyCode::Char('c')
-                {
+                if key.modifiers.contains(KeyModifiers::CONTROL) && key.code == KeyCode::Char('c') {
                     return Ok(None);
                 }