fix: resolve go vet error and dayStart logic in ComputeDailyTotals

- Fix 'string(d)' int-to-rune conversion in rpg_test.go by using fmt.Sprintf
- Fix ComputeDailyTotals dayStart logic: initial state should be StateWorking
  when dayStart > 0, correctly counting work from dayStart to first out event
- Update README project structure to reflect new domain/handler/repo layout
- Implement missing achievements: rpg_pioneer (on RPG enable) and
  salary_setter (on first rate set)
- Add tryUnlockAchievement helper to Handler

internal/handler/note.go

@@ -0,0 +1,91 @@
+package handler
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"github.com/go-telegram/bot/models"
+
+	"worktimeBot/internal/domain"
+)
+
+// handleNote handles /note [YYYY-MM-DD] HH:MM <text> command.
+func (h *Handler) handleNote(ctx context.Context, msg *models.Message, user *domain.User) {
+	loc := h.loadLocation(user.Timezone)
+	parts := strings.Fields(msg.Text)
+	if len(parts) < 3 {
+		h.promptForNote(ctx, msg, user)
+		return
+	}
+
+	var dateStr string
+	var timeStr string
+	var noteParts []string
+
+	if len(parts[1]) == 10 && parts[1][4] == '-' && parts[1][7] == '-' {
+		dateStr = parts[1]
+		timeStr = parts[2]
+		noteParts = parts[3:]
+	} else {
+		dateStr = time.Now().In(loc).Format(domain.DateLayout)
+		timeStr = parts[1]
+		noteParts = parts[2:]
+	}
+
+	if len(noteParts) == 0 {
+		h.promptForNote(ctx, msg, user)
+		return
+	}
+
+	events, err := h.Repo.EventsForDayByDate(user.ID, dateStr)
+	if err != nil || len(events) == 0 {
+		h.sendText(ctx, msg.Chat.ID, "No events found for that day")
+		return
+	}
+
+	var targetEvent *domain.Event
+	for i := range events {
+		t := time.Unix(events[i].OccurredAt, 0).In(loc).Format(domain.TimeLayout)
+		if t == timeStr {
+			targetEvent = &events[i]
+			break
+		}
+	}
+	if targetEvent == nil {
+		h.sendText(ctx, msg.Chat.ID, "No event found at that time")
+		return
+	}
+
+	note := domain.SanitizeNote(strings.Join(noteParts, " "))
+	if err := h.Repo.SetEventNote(targetEvent.ID, note); err != nil {
+		h.sendText(ctx, msg.Chat.ID, "Error saving note")
+		return
+	}
+	h.sendText(ctx, msg.Chat.ID, "Note saved")
+}
+
+func (h *Handler) promptForNote(ctx context.Context, msg *models.Message, user *domain.User) {
+	h.sendText(ctx, msg.Chat.ID, "Usage: /note [YYYY-MM-DD] HH:MM <text>\nUse the History menu to add notes visually.")
+}
+
+// handleEdit handles /edit YYYY-MM-DD command.
+func (h *Handler) handleEdit(ctx context.Context, msg *models.Message, user *domain.User) {
+	date := strings.TrimSpace(strings.TrimPrefix(msg.Text, "/edit"))
+	if date == "" {
+		h.sendText(ctx, msg.Chat.ID, "Usage: /edit YYYY-MM-DD (your calendar type)")
+		return
+	}
+	if len(date) != 10 || date[4] != '-' || date[7] != '-' {
+		h.sendText(ctx, msg.Chat.ID, "Invalid date. Use: /edit YYYY-MM-DD (your calendar type)")
+		return
+	}
+	_, m, d := domain.ParseGregorianDateKey(date)
+	if m < 1 || m > 12 || d < 1 || d > 31 {
+		h.sendText(ctx, msg.Chat.ID, "Invalid date.")
+		return
+	}
+	loc := h.loadLocation(user.Timezone)
+	date = domain.UserDateToGregorian(date, user.Calendar)
+	h.sendDayView(ctx, msg.Chat.ID, 0, user, date, loc, true)
+}