refactor: restore stored aggregates with incremental update on edit

- Restore TotalWorkSeconds, CurrentStreak, LongestStreak writes in
  computeAndAwardXP and updateStreak (incremental on clock out)
- Add recalcDayWorkSeconds and recalcAggregates for event edit path
  (recompute day + total + streak from scratch when events change)
- Call recalcAggregates after editEventTimeSet, deleteEventConfirm,
  addEventDo in calendar.go
- Remove runtime computeStreaks and totalWorkSeconds (N+1 scan)
  from RPG display, burnout, and clockOut
- Add SetDailyWorkSeconds, SumDailyWorkSeconds store methods
- Clean up unused dead functions and dead code in rpg.go

internal/bot/calendar.go

@@ -510,7 +510,7 @@ func (h *Handler) editEventTimeSet(ctx context.Context, chatID int64, msgID int,
 	}
 	t := time.Unix(event.OccurredAt, 0).In(loc)
 	newTime := time.Date(t.Year(), t.Month(), t.Day(), hh, mm, 0, 0, loc)
-	date := t.Format(DateLayout)
+	date := newTime.Format(DateLayout)
 
 	// Reject if the new time collides with another event's timestamp
 	events, err := h.DB.EventsForDayByDate(user.ID, date)
@@ -563,6 +563,8 @@ func (h *Handler) editEventTimeSet(ctx context.Context, chatID int64, msgID int,
 		h.sendDayView(ctx, chatID, msgID, user, date, loc, false)
 		return
 	}
+	h.recalcDayWorkSeconds(user.ID, date, loc)
+	h.recalcAggregates(user.ID, loc)
 	h.sendDayView(ctx, chatID, msgID, user, date, loc, false)
 }
 
@@ -635,6 +637,8 @@ func (h *Handler) deleteEventConfirm(ctx context.Context, chatID int64, msgID in
 		}
 	}
 
+	h.recalcDayWorkSeconds(user.ID, date, loc)
+	h.recalcAggregates(user.ID, loc)
 	h.sendDayView(ctx, chatID, msgID, user, date, loc, false)
 }
 
@@ -707,6 +711,8 @@ func (h *Handler) addEventDo(ctx context.Context, chatID int64, msgID int, user
 		return
 	}
 
+	h.recalcDayWorkSeconds(user.ID, date, loc)
+	h.recalcAggregates(user.ID, loc)
 	h.sendDayView(ctx, chatID, msgID, user, date, loc, false)
 }
 

internal/bot/clock.go

@@ -70,10 +70,10 @@ func (h *Handler) clockOut(chatID int64) (string, error) {
 		today := now.Format(DateLayout)
 		isWeekend := now.Weekday() == time.Saturday || now.Weekday() == time.Sunday
 
-		streak, _ := h.updateStreak(user.ID, today, true)
-		xp, leveledUp, newLevel, _ := h.computeAndAwardXP(user.ID, sessionWork, streak, today)
 		stats, _ := h.DB.GetOrCreateRPGStats(user.ID)
-		totalHours := float64(h.totalWorkSeconds(user.ID, loc)) / secondsPerHour
+		h.updateStreak(stats, user.ID, today)
+		xp, leveledUp, newLevel, _ := h.computeAndAwardXP(stats, user.ID, sessionWork, stats.CurrentStreak, today)
+		totalHours := float64(stats.TotalWorkSeconds) / secondsPerHour
 		unlocked := h.checkAchievements(user.ID, stats, sessionWork, today, isWeekend, totalHours)
 
 		text += fmt.Sprintf("\n\n+%d XP (Lv.%d)", xp, newLevel)

internal/bot/rpg.go

@@ -47,14 +47,10 @@ func streakBonus(streak int) int64 {
 	return b
 }
 
-// computeAndAwardXP calculates XP for a work session and updates the DB.
-// Returns the new total XP and whether the user leveled up.
-func (h *Handler) computeAndAwardXP(userID int64, workSeconds int64, streak int, date string) (newXP int64, leveledUp bool, newLevel int, err error) {
-	stats, err := h.DB.GetOrCreateRPGStats(userID)
-	if err != nil {
-		return 0, false, 0, err
-	}
-
+// computeAndAwardXP calculates XP for a work session and persists it.
+// stats must already have the streak updated before calling.
+// Returns the new total XP, whether the user leveled up, and the new level.
+func (h *Handler) computeAndAwardXP(stats *db.RPGStats, userID int64, workSeconds int64, streak int, date string) (newXP int64, leveledUp bool, newLevel int, err error) {
 	baseXP := xpForWorkSeconds(workSeconds)
 	bonus := streakBonus(streak)
 	totalXP := baseXP + bonus
@@ -81,25 +77,11 @@ func (h *Handler) computeAndAwardXP(userID int64, workSeconds int64, streak int,
 }
 
 // updateStreak advances or resets the user's streak based on today's activity.
-// Returns the updated streak count.
-func (h *Handler) updateStreak(userID int64, date string, hasWorkToday bool) (int, error) {
-	stats, err := h.DB.GetOrCreateRPGStats(userID)
-	if err != nil {
-		return 0, err
-	}
-
-	if !hasWorkToday {
-		stats.CurrentStreak = 0
-		if err := h.DB.UpdateRPGStats(stats); err != nil {
-			return 0, err
-		}
-		return 0, nil
-	}
-
-	// Parse yesterday to check continuity
+// Only called from clockOut — incremental update, not a full scan.
+func (h *Handler) updateStreak(stats *db.RPGStats, userID int64, date string) {
 	t, err := time.Parse(DateLayout, date)
 	if err != nil {
-		return 0, err
+		return
 	}
 	yesterday := t.AddDate(0, 0, -1).Format(DateLayout)
 
@@ -115,12 +97,91 @@ func (h *Handler) updateStreak(userID int64, date string, hasWorkToday bool) (in
 	if stats.CurrentStreak > stats.LongestStreak {
 		stats.LongestStreak = stats.CurrentStreak
 	}
+}
 
-	if err := h.DB.UpdateRPGStats(stats); err != nil {
-		return 0, err
+// recalcDayWorkSeconds recomputes work_seconds for a single day from events and updates daily_xp.
+func (h *Handler) recalcDayWorkSeconds(userID int64, date string, loc *time.Location) {
+	events, err := h.DB.EventsForDayByDate(userID, date)
+	if err != nil {
+		return
+	}
+	day, err := h.DB.GetDay(userID, date)
+	if err != nil {
+		return
+	}
+	y, m, d := parseGregorianDateKey(date)
+	dayStart := time.Date(y, time.Month(m), d, 0, 0, 0, 0, loc).Unix()
+	dayEnd := time.Date(y, time.Month(m), d, 23, 59, 59, 0, loc).Unix()
+	totals := ComputeDailyTotals(events, day.MinBreakThreshold, dayStart, dayEnd)
+	if err := h.DB.SetDailyWorkSeconds(userID, date, totals.TotalSeconds); err != nil {
+		slog.Warn("failed to set daily work seconds", "user_id", userID, "date", date, "error", err)
+	}
+}
+
+// recalcAggregates recomputes total_work_seconds and streak from scratch after event edits.
+func (h *Handler) recalcAggregates(userID int64, loc *time.Location) {
+	total, err := h.DB.SumDailyWorkSeconds(userID)
+	if err != nil {
+		slog.Warn("failed to sum daily work seconds", "user_id", userID, "error", err)
+		return
 	}
 
-	return stats.CurrentStreak, nil
+	stats, err := h.DB.GetOrCreateRPGStats(userID)
+	if err != nil {
+		slog.Warn("failed to get rpg stats for recalc", "user_id", userID, "error", err)
+		return
+	}
+	stats.TotalWorkSeconds = total
+
+	// Recompute streak from scratch
+	dates, err := h.DB.GetDatesWithEvents(userID)
+	if err == nil && len(dates) > 0 {
+		dateSet := make(map[string]struct{}, len(dates))
+		for _, d := range dates {
+			dateSet[d] = struct{}{}
+		}
+		today := time.Now().In(loc).Format(DateLayout)
+
+		// Current streak
+		stats.CurrentStreak = 0
+		if _, ok := dateSet[today]; ok {
+			stats.CurrentStreak = 1
+			for i := 1; ; i++ {
+				prev := time.Now().In(loc).AddDate(0, 0, -i).Format(DateLayout)
+				if _, ok := dateSet[prev]; ok {
+					stats.CurrentStreak++
+				} else {
+					break
+				}
+			}
+		}
+
+		// Longest streak
+		stats.LongestStreak = 0
+		run := 1
+		for i := 1; i < len(dates); i++ {
+			prev, _ := time.Parse(DateLayout, dates[i-1])
+			curr, _ := time.Parse(DateLayout, dates[i])
+			if curr.Sub(prev).Hours() == 24 {
+				run++
+			} else {
+				if run > stats.LongestStreak {
+					stats.LongestStreak = run
+				}
+				run = 1
+			}
+		}
+		if run > stats.LongestStreak {
+			stats.LongestStreak = run
+		}
+	} else {
+		stats.CurrentStreak = 0
+		stats.LongestStreak = 0
+	}
+
+	if err := h.DB.UpdateRPGStats(stats); err != nil {
+		slog.Warn("failed to update rpg stats after recalc", "user_id", userID, "error", err)
+	}
 }
 
 // checkAchievements evaluates and unlocks any newly earned achievements.
@@ -237,32 +298,6 @@ func (h *Handler) checkLevelAchievements(u *achievementUnlocker, stats *db.RPGSt
 	}
 }
 
-// totalWorkSeconds computes actual total work seconds from all events for the user.
-// Calculated at runtime to stay in sync with event edits.
-func (h *Handler) totalWorkSeconds(userID int64, loc *time.Location) int64 {
-	days, err := h.DB.GetUserDaysInRange(userID, "2000-01-01", "2100-01-01")
-	if err != nil {
-		return 0
-	}
-
-	var total int64
-	for _, day := range days {
-		if day.IsDayOff {
-			continue
-		}
-		events, err := h.DB.EventsForDayByDayID(day.ID)
-		if err != nil || len(events) == 0 {
-			continue
-		}
-		y, m, d := parseGregorianDateKey(day.Date)
-		dayStart := time.Date(y, time.Month(m), d, 0, 0, 0, 0, loc).Unix()
-		dayEnd := time.Date(y, time.Month(m), d, 23, 59, 59, 0, loc).Unix()
-		totals := ComputeDailyTotals(events, day.MinBreakThreshold, dayStart, dayEnd)
-		total += totals.TotalSeconds
-	}
-	return total
-}
-
 // buildRPGStatus returns a formatted string showing the user's RPG stats.
 func (h *Handler) buildRPGStatus(userID int64, loc *time.Location) string {
 	stats, err := h.DB.GetOrCreateRPGStats(userID)
@@ -280,7 +315,7 @@ func (h *Handler) buildRPGStatus(userID int64, loc *time.Location) string {
 	b.WriteString(fmt.Sprintf("XP: %d / %d (%d%%)\n", stats.XP, nextLevelXP, xpIntoLevel*100/xpNeeded))
 	b.WriteString(fmt.Sprintf("Streak: %d days (best: %d)\n", stats.CurrentStreak, stats.LongestStreak))
 
-	hoursTotal := float64(h.totalWorkSeconds(userID, loc)) / secondsPerHour
+	hoursTotal := float64(stats.TotalWorkSeconds) / secondsPerHour
 	b.WriteString(fmt.Sprintf("Total work: %.1f hours\n", hoursTotal))
 
 	// Show achievements count