Refactor userId handling in cigarettes and stats routes to use mongoose ObjectId for consistency; add debug logging for stats aggregation.

server/routers/smoke-tracker/cigarettes.js

@@ -1,4 +1,5 @@
 const { Router } = require('express')
+const mongoose = require('mongoose')
 
 const { getAnswer } = require('../../utils/common')
 const { CigaretteModel } = require('./model/cigarette')
@@ -27,7 +28,7 @@ router.post('/', async (req, res, next) => {
     }
 
     const item = await CigaretteModel.create({
-      userId: user.id,
+      userId: new mongoose.Types.ObjectId(user.id),
       smokedAt: date,
       note,
     })
@@ -44,7 +45,7 @@ router.get('/', async (req, res, next) => {
     const user = req.user
     const { from, to } = req.query
 
-    const filter = { userId: user.id }
+    const filter = { userId: new mongoose.Types.ObjectId(user.id) }
 
     if (from || to) {
       filter.smokedAt = {}

server/routers/smoke-tracker/stats.js

@@ -1,4 +1,5 @@
 const { Router } = require('express')
+const mongoose = require('mongoose')
 
 const { getAnswer } = require('../../utils/common')
 const { CigaretteModel } = require('./model/cigarette')
@@ -23,19 +24,24 @@ router.get('/daily', async (req, res, next) => {
     const toDate = to ? new Date(to) : now
 
     const match = {
-      userId: user.id,
+      userId: new mongoose.Types.ObjectId(user.id),
       smokedAt: {
         $gte: fromDate,
         $lte: toDate,
       },
     }
 
+    // Отладка: проверяем, сколько записей попадает в фильтр
+    const totalCount = await CigaretteModel.countDocuments(match)
+    console.log('[STATS] Match filter:', JSON.stringify(match, null, 2))
+    console.log('[STATS] Total cigarettes in range:', totalCount)
+
     const data = await CigaretteModel.aggregate([
       { $match: match },
       {
         $group: {
           _id: {
-            $dateToString: { format: '%Y-%m-%d', date: '$smokedAt' },
+            $dateToString: { format: '%Y-%m-%d', date: '$smokedAt', timezone: 'UTC' },
           },
           count: { $sum: 1 },
         },
@@ -43,6 +49,8 @@ router.get('/daily', async (req, res, next) => {
       { $sort: { _id: 1 } },
     ])
 
+    console.log('[STATS] Aggregation result:', data)
+
     const result = data.map((item) => ({
       date: item._id,
       count: item.count,