Refactor: simplify word navigation logic, improve line wrapping, and enhance parameter initialization across core and TUI modules.

crates/owlen-tui/src/ui.rs

@@ -30,7 +30,7 @@ pub fn render_chat(frame: &mut Frame<'_>, app: &mut ChatApp) {
         } else {
             buffer_text.lines().collect()
         };
-        let visual_lines = calculate_wrapped_line_count(lines.into_iter(), available_width);
+        let visual_lines = calculate_wrapped_line_count(lines, available_width);
         (visual_lines as u16).min(10) + 2 // +2 for borders
     };
 
@@ -283,7 +283,7 @@ fn compute_cursor_metrics(
 
     for (row_idx, line) in lines.iter().enumerate() {
         let display_owned = mask_char.map(|mask| mask_line(line, mask));
-        let display_line = display_owned.as_deref().unwrap_or_else(|| line.as_str());
+        let display_line = display_owned.as_deref().unwrap_or(line.as_str());
 
         let mut segments = if wrap_lines {
             wrap_line_segments(display_line, content_width)
@@ -889,7 +889,7 @@ fn render_input(frame: &mut Frame<'_>, area: Rect, app: &mut ChatApp) {
         let lines: Vec<Line> = if input_text.is_empty() {
             vec![Line::from("Press 'i' to start typing")]
         } else {
-            input_text.lines().map(|line| Line::from(line)).collect()
+            input_text.lines().map(Line::from).collect()
         };
 
         let paragraph = Paragraph::new(lines)