feat: add fixed load scale (--loadmax), load peak reset (r key), update README

- config: add LoadMax float64 field; loadmax key in ~/.loadbarsrc; written by 'w'
- main: add --loadmax flag (overrides rc file when > 0)
- display: newRunState initialises loadPeak from LoadMax when fixed
- display: updateLoadPeak accepts loadMax param; short-circuits to fixed value when set
- display: add 'r' hotkey to reset auto-scale peak to floor (2.0); no-op when fixed
- tooltip: loadTooltipLines shows 'Max:' label when scale is fixed, 'Peak:' for auto
- README: document 4/l load toggle, r reset, --showload, --loadmax, load average bars section; fix --cpumode entry

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

1 files changed, 6 insertions, 1 deletions

diff --git a/cmd/loadbars/main.go b/cmd/loadbars/main.go
index 0ee8071..dd86723 100644
--- a/cmd/loadbars/main.go
+++ b/cmd/loadbars/main.go
@@ -35,6 +35,7 @@ func main() {
 	flag.StringVar(&cfg.SSHOpts, "sshopts", cfg.SSHOpts, "Set SSH options")
 	flag.BoolVar(&cfg.HasAgent, "hasagent", cfg.HasAgent, "SSH key already known by agent")
 	flag.IntVar(&cfg.MaxBarsPerRow, "maxbarsperrow", cfg.MaxBarsPerRow, "Max bars per row (0=unlimited)")
+	loadmax := flag.Float64("loadmax", 0, "Fixed load bar full-height reference value (0 = auto-scale)")
 
 	flag.Parse()
 
@@ -48,7 +49,11 @@ func main() {
 		os.Exit(constants.EUnknown)
 	}
 
-	// Flags override config file; re-parse into cfg for hosts/cluster
+	// Flags override config file; re-parse into cfg for hosts/cluster.
+	// --loadmax overrides the rc file value when explicitly set to a positive number.
+	if *loadmax > 0 {
+		cfg.LoadMax = *loadmax
+	}
 	if *cluster != "" {
 		cfg.Cluster = *cluster
 	}