Code Farm: per-plot auto-replant pause and crop-lock check; community sync and node work

Continuous Delivery could never be turned off once a crop was planted. Add a
one-shot per-plot "stop after harvest" flag (POST /game/plot/stop, Devii tool
game_plot_stop, game_plots.stop_after_harvest), cleared by the next plant,
autoreplant claim or Refactor. Autoreplant now also respects crop locks through
the shared _crop_lock predicate. Plan and measurements in happyplanting.md.

Also includes the pending community sync, node network and related work in the
tree; the full suite passed (4999) with all of it.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

nodes/client/limits.go

@@ -27,6 +27,7 @@ type Limiter struct {
 	serverLimit ServerLimits
 	serverSet   ServerSettings
 	hasServer   bool
+	battery     *batteryWatch
 	day         string
 	used        int64
 	active      int
@@ -38,7 +39,7 @@ func NewLimiter(cfg Config, statePath string, now func() time.Time) (*Limiter, e
 	if err != nil {
 		return nil, err
 	}
-	limiter := &Limiter{cfg: cfg, loc: loc, now: now, statePath: statePath}
+	limiter := &Limiter{cfg: cfg, loc: loc, now: now, statePath: statePath, battery: newBatteryWatch(systemBattery, now)}
 	limiter.load()
 	return limiter, nil
 }
@@ -165,6 +166,13 @@ func (l *Limiter) hoursCode() string {
 	return ""
 }
 
+func (l *Limiter) SetBatteryProbe(probe BatteryProbe, debugf func(format string, args ...any)) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	l.battery = newBatteryWatch(probe, l.now)
+	l.battery.debugf = debugf
+}
+
 func (l *Limiter) Acquire() string {
 	l.mu.Lock()
 	defer l.mu.Unlock()
@@ -172,6 +180,9 @@ func (l *Limiter) Acquire() string {
 	if code := l.hoursCode(); code != "" {
 		return code
 	}
+	if l.serverSet.PauseOnBattery && l.battery.OnBattery() {
+		return RefuseBattery
+	}
 	if l.used >= l.capBytes() {
 		return RefuseBandwidth
 	}