bit of refactoring, first attempts at a conversational style.

going to need to really seperate the ui logic since the code is getting too big to just put it all together.

src/ui/mod.rs

@@ -0,0 +1,57 @@
+use ratatui::{
+    layout::{Constraint, Direction, Layout},
+    style::{Color, Style},
+    text::{Line, Span},
+    widgets::{Block, Borders, Paragraph},
+};
+
+pub fn chat_ui(f: &mut ratatui::Frame, app: &crate::App) {
+    let chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .margin(1)
+        .constraints([Constraint::Min(1), Constraint::Length(3)].as_ref())
+        .split(f.area());
+
+    let chat_messages: Vec<Line> = app
+        .messages
+        .iter()
+        .map(|m| {
+            Line::from(Span::raw(format!(
+                "{}: {}",
+                m.role.to_string(),
+                m.to_string()
+            )))
+        })
+        .collect();
+
+    let messages_block = Paragraph::new(ratatui::text::Text::from(chat_messages))
+        .block(Block::default().borders(Borders::ALL).title("Chat"))
+        .wrap(ratatui::widgets::Wrap { trim: true })
+        .scroll((
+            app.messages
+                .len()
+                .saturating_sub((chunks[0].height - 2) as usize) as u16,
+            0,
+        ));
+
+    f.render_widget(messages_block, chunks[0]);
+
+    let input_text = if app.waiting {
+        format!("> {} (waiting...)", &app.prompt)
+    } else {
+        format!("> {}", app.prompt)
+    };
+
+    let input = Paragraph::new(input_text)
+        .style(Style::default().fg(Color::Yellow))
+        .block(Block::default().borders(Borders::ALL).title("Input"));
+    f.render_widget(input, chunks[1]);
+
+    use ratatui::layout::Position;
+    f.set_cursor_position(Position::new(
+        // the +3 comes from the 3 'characters' of space between the terminal edge and the text location
+        // this places the text cursor after the last entered character
+        chunks[1].x + app.prompt.len() as u16 + 3,
+        chunks[1].y + 1,
+    ));
+}