feat: add Telegram bot with notifications and scheduler

internal/service/habit.go

@@ -1,6 +1,7 @@
 package service
 
 import (
+	"database/sql"
 	"time"
 
 	"github.com/daniil/homelab-api/internal/model"
@@ -27,10 +28,15 @@ func (s *HabitService) Create(userID int64, req *model.CreateHabitRequest) (*mod
 		TargetCount: defaultInt(req.TargetCount, 1),
 	}
 
+	if req.ReminderTime != nil && *req.ReminderTime != "" {
+		habit.ReminderTime = sql.NullString{String: *req.ReminderTime, Valid: true}
+	}
+
 	if err := s.habitRepo.Create(habit); err != nil {
 		return nil, err
 	}
 
+	habit.ProcessForJSON()
 	return habit, nil
 }
 
@@ -76,6 +82,13 @@ func (s *HabitService) Update(id, userID int64, req *model.UpdateHabitRequest) (
 	if req.TargetCount != nil {
 		habit.TargetCount = *req.TargetCount
 	}
+	if req.ReminderTime != nil {
+		if *req.ReminderTime == "" {
+			habit.ReminderTime = sql.NullString{Valid: false}
+		} else {
+			habit.ReminderTime = sql.NullString{String: *req.ReminderTime, Valid: true}
+		}
+	}
 	if req.IsArchived != nil {
 		habit.IsArchived = *req.IsArchived
 	}
@@ -84,6 +97,7 @@ func (s *HabitService) Update(id, userID int64, req *model.UpdateHabitRequest) (
 		return nil, err
 	}
 
+	habit.ProcessForJSON()
 	return habit, nil
 }