feat: add load average bar visualization (4/l hotkey)0.12.0

Adds a new teal bar type showing /proc/loadavg data per host.
The 1-min average fills from the top downward; yellow and white
1px reference lines mark the 5-min and 15-min averages. A global
loadPeak tracker (floor 2.0, slow per-frame decay) keeps the scale
meaningful across hosts and after spikes. Toggle with 4 or l;
persisted to ~/.loadbarsrc as showload=1.

Bump version to 0.12.0.

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

1 files changed, 24 insertions, 0 deletions

diff --git a/internal/display/tooltip.go b/internal/display/tooltip.go
index 42075e0..e5cf951 100644
--- a/internal/display/tooltip.go
+++ b/internal/display/tooltip.go
@@ -2,6 +2,8 @@ package display
 
 import (
 	"fmt"
+	"strconv"
+	"strings"
 	"time"
 
 	"codeberg.org/snonux/loadbars/internal/config"
@@ -34,6 +36,8 @@ func tooltipLines(bar *barDescriptor, snap map[string]*stats.HostStats, cfg *con
 		return memTooltipLines(bar, h, state)
 	case barNet:
 		return netTooltipLines(bar, cfg, state)
+	case barLoad:
+		return loadTooltipLines(bar, h, state)
 	}
 	return nil
 }
@@ -96,6 +100,26 @@ func netTooltipLines(bar *barDescriptor, cfg *config.Config, state *runState) []
 	return lines
 }
 
+// loadTooltipLines returns tooltip text for a load-average bar showing
+// the smoothed 1/5/15-min averages and the current global peak scale.
+func loadTooltipLines(bar *barDescriptor, h *stats.HostStats, state *runState) []string {
+	lines := []string{fmt.Sprintf("%s [load]", bar.host)}
+	l1, err1 := strconv.ParseFloat(strings.TrimSpace(h.LoadAvg1), 64)
+	l5, err5 := strconv.ParseFloat(strings.TrimSpace(h.LoadAvg5), 64)
+	l15, err15 := strconv.ParseFloat(strings.TrimSpace(h.LoadAvg15), 64)
+	if err1 != nil || err5 != nil || err15 != nil {
+		lines = append(lines, "No data yet")
+		return lines
+	}
+	lines = append(lines,
+		fmt.Sprintf("1min:  %.2f", l1),
+		fmt.Sprintf("5min:  %.2f", l5),
+		fmt.Sprintf("15min: %.2f", l15),
+		fmt.Sprintf("Peak:  %.2f", state.loadPeak),
+	)
+	return lines
+}
+
 // formatKB formats a value in KB as a human-readable string (KB, MB, or GB).
 func formatKB(kb int64) string {
 	switch {