Feat: CPU meter in top bar

src/views/render.rs

@@ -407,28 +407,36 @@ fn render_header(
         pattern_area,
     );
 
-    // Stats block
+    // Stats block — CPU bar filling the area, text overlaid
     let cpu_pct = (app.metrics.cpu_load * 100.0).min(100.0);
-    let peers = link.peers();
     let voices = app.metrics.active_voices;
-    let cpu_color = if cpu_pct >= 80.0 {
+    let cpu_bar_color = if cpu_pct >= 80.0 {
         theme.flash.error_fg
     } else if cpu_pct >= 50.0 {
         theme.ui.accent
     } else {
-        theme.header.stats_fg
+        theme.meter.low
     };
-    let dim = Style::new()
-        .bg(theme.header.stats_bg)
-        .fg(theme.header.stats_fg);
-    let stats_line = Line::from(vec![
-        Span::styled(format!(" CPU {cpu_pct:.0}%"), dim.fg(cpu_color)),
-        Span::styled(format!("  V:{voices}  L:{peers} "), dim),
-    ]);
-    let block_style = Style::new().bg(theme.header.stats_bg);
+
     frame.render_widget(
-        Paragraph::new(stats_line)
-            .block(Block::default().padding(pad).style(block_style))
+        Block::default().style(Style::new().bg(theme.header.stats_bg)),
+        stats_area,
+    );
+    let filled_w = (cpu_pct / 100.0 * stats_area.width as f32).round() as u16;
+    if filled_w > 0 {
+        frame.render_widget(
+            Block::default().style(Style::new().bg(cpu_bar_color)),
+            Rect {
+                width: filled_w.min(stats_area.width),
+                ..stats_area
+            },
+        );
+    }
+    let stats_text = format!("CPU {cpu_pct:.0}%  V:{voices}");
+    frame.render_widget(
+        Paragraph::new(stats_text)
+            .block(Block::default().padding(pad))
+            .style(Style::new().fg(theme.ui.text_primary))
             .alignment(Alignment::Center),
         stats_area,
     );