Refactor scheduler and settings UI

internal/scheduler/scheduler_test.go

@@ -0,0 +1,24 @@
+package scheduler
+
+import (
+	"testing"
+	"time"
+)
+
+func TestJobDue(t *testing.T) {
+	now := time.Date(2026, 3, 7, 12, 0, 0, 0, time.UTC)
+
+	if !jobDue(nil, now, time.Hour) {
+		t.Fatalf("expected nil lastFinishedAt to be due")
+	}
+
+	lastFinished := now.Add(-59 * time.Minute)
+	if jobDue(&lastFinished, now, time.Hour) {
+		t.Fatalf("expected job not to be due before interval elapsed")
+	}
+
+	lastFinished = now.Add(-1 * time.Hour)
+	if !jobDue(&lastFinished, now, time.Hour) {
+		t.Fatalf("expected job to be due at interval boundary")
+	}
+}