Expand test coverage across server, agent, and web; fix bugs found during audit.

Adds hundreds of unit/integration/e2e tests, fixes WS bcrypt auth, config merge, fleet analytics, agent schedule/log tail, and documents stale PROBLEMS items. Updates PROBLEMS.md, README, and test scripts; ignores local spread-kits and coverage dirs.

agent/miner/schedule.go

@@ -25,11 +25,15 @@ func NewScheduleGuard(cfg config.RuntimeConfig, reporter *stats.Reporter) *Sched
 }
 
 func (g *ScheduleGuard) Allowed() bool {
+	return g.allowedAt(time.Now())
+}
+
+func (g *ScheduleGuard) allowedAt(now time.Time) bool {
 	switch g.cfg.MiningModeNormalized() {
 	case "idle":
 		return g.idleAllowed()
-	case "scheduled":
-		return g.cfg.InScheduleWindow(time.Now())
+	case "scheduled", "schedule":
+		return g.cfg.InScheduleWindow(now)
 	default:
 		return true
 	}