fix: correct daily work/break calculations and league back button

- ComputeDailyTotals: only assume working from dayStart when first event
  is 'out' (cross-midnight session); otherwise start idle. Fixes inflated
  work/break counts in reports, status, export, burnout, salary, and RPG.
- leagueToggleCallback: add settings back keyboard when RPG is disabled.
- webhook: add graceful HTTP server shutdown on context cancellation.

internal/domain/totals.go

@@ -18,7 +18,7 @@ func ComputeDailyTotals(events []Event, minBreakThreshold int64, dayStart, dayEn
 	state := StateIdle
 	var workStart, breakStart int64
 
-	if dayStart > 0 {
+	if dayStart > 0 && sorted[0].EventType == "out" {
 		state = StateWorking
 		workStart = dayStart
 	} else if sorted[0].EventType == "out" {

internal/domain/totals_test.go

@@ -36,7 +36,7 @@ func TestComputeDailyTotals_SingleInOut(t *testing.T) {
 	}
 }
 
-func TestComputeDailyTotals_MissingFirstIn(t *testing.T) {
+func TestComputeDailyTotals_DayStartWithOutFirst(t *testing.T) {
 	events := []Event{
 		mkEvent("out", 200),
 		mkEvent("in", 300),
@@ -44,7 +44,39 @@ func TestComputeDailyTotals_MissingFirstIn(t *testing.T) {
 	}
 	got := ComputeDailyTotals(events, 0, 100, 500)
 	if got.TotalSeconds != 200 {
-		t.Errorf("missing first in: TotalSeconds=%d, want 200", got.TotalSeconds)
+		t.Errorf("dayStart with out first: TotalSeconds=%d, want 200", got.TotalSeconds)
+	}
+}
+
+func TestComputeDailyTotals_DayStartWithInFirst(t *testing.T) {
+	events := []Event{
+		mkEvent("in", 100),
+		mkEvent("out", 200),
+		mkEvent("in", 300),
+		mkEvent("out", 400),
+	}
+	got := ComputeDailyTotals(events, 0, 50, 500)
+	if got.TotalSeconds != 200 {
+		t.Errorf("dayStart with in first: TotalSeconds=%d, want 200", got.TotalSeconds)
+	}
+	if got.BreakSeconds != 200 {
+		t.Errorf("dayStart with in first: BreakSeconds=%d, want 200", got.BreakSeconds)
+	}
+}
+
+func TestComputeDailyTotals_DayStartInFirstRealistic(t *testing.T) {
+	events := []Event{
+		mkEvent("in", 33060),
+		mkEvent("out", 47100),
+		mkEvent("in", 48780),
+		mkEvent("out", 74460),
+	}
+	got := ComputeDailyTotals(events, 0, 0, 86399)
+	if got.TotalSeconds != 39720 {
+		t.Errorf("realistic day: TotalSeconds=%d, want 39720 (11h 02m)", got.TotalSeconds)
+	}
+	if got.BreakSeconds != 13619 {
+		t.Errorf("realistic day: BreakSeconds=%d, want 13619 (3h 19m)", got.BreakSeconds)
 	}
 }