kptui: Unread indicator, highlight vs selected state

core/kptui/src/main.rs

@@ -179,21 +179,32 @@ fn ui(frame: &mut Frame, app: &AppState, requested_view: ViewMode) {
 
 fn render_conversations(frame: &mut Frame, app: &AppState, area: Rect, in_split: bool) {
     let title = if in_split {
-        "Conversations (↑/↓, Enter)"
+        "Conversations (↑/↓ move, ▸ cursor, ● unread)"
     } else {
-        "Conversations (↑/↓, Enter to open)"
+        "Conversations (↑/↓ move, Enter open, ● unread)"
     };
 
     let items = app
         .conversations
         .iter()
         .map(|c| {
+            let is_active = app.active_conversation_id.as_deref() == Some(c.id.as_str());
             let unread = if c.unread_count > 0 {
                 format!(" ({})", c.unread_count)
             } else {
                 String::new()
             };
             let header = Line::from(vec![
+                Span::styled(
+                    if c.unread_count > 0 { "● " } else { "  " },
+                    Style::default()
+                        .fg(if c.unread_count > 0 {
+                            Color::LightYellow
+                        } else {
+                            Color::DarkGray
+                        })
+                        .add_modifier(Modifier::BOLD),
+                ),
                 Span::styled(
                     c.title.clone(),
                     Style::default().add_modifier(Modifier::BOLD),
@@ -202,9 +213,17 @@ fn render_conversations(frame: &mut Frame, app: &AppState, area: Rect, in_split:
             ]);
             let preview = Line::from(Span::styled(
                 c.preview.clone(),
-                Style::default().fg(Color::DarkGray),
+                Style::default().fg(if is_active {
+                    Color::Gray
+                } else {
+                    Color::DarkGray
+                }),
             ));
-            ListItem::new(vec![header, preview])
+            ListItem::new(vec![header, preview]).style(if is_active {
+                Style::default().bg(Color::DarkGray)
+            } else {
+                Style::default()
+            })
         })
         .collect::<Vec<_>>();