feat: 实现月度记账开始日期功能

- 添加 Settings 实体和 DAO 来持久化存储设置
- 创建 SettingsRepository 管理设置数据
- 添加数据库迁移从版本 4 到版本 5
- 在设置界面添加月度开始日期选择器（1-28号）
- 创建 DateUtils 工具类处理基于月度开始日期的日期计算
- 更新 HomeViewModel 和 AnalysisViewModel 使用月度开始日期进行统计
- 修复日期选择器中数字显示不完整的问题

app/src/main/java/com/yovinchen/bookkeeping/data/BookkeepingDatabase.kt

@@ -13,14 +13,15 @@ import com.yovinchen.bookkeeping.model.BookkeepingRecord
 import com.yovinchen.bookkeeping.model.Category
 import com.yovinchen.bookkeeping.model.Converters
 import com.yovinchen.bookkeeping.model.Member
+import com.yovinchen.bookkeeping.model.Settings
 import com.yovinchen.bookkeeping.model.TransactionType
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
 @Database(
-    entities = [BookkeepingRecord::class, Category::class, Member::class],
+    entities = [BookkeepingRecord::class, Category::class, Member::class, Settings::class],
-    version = 4,
+    version = 5,
     exportSchema = false
 )
 @TypeConverters(Converters::class)
@@ -28,6 +29,7 @@ abstract class BookkeepingDatabase : RoomDatabase() {
     abstract fun bookkeepingDao(): BookkeepingDao
     abstract fun categoryDao(): CategoryDao
     abstract fun memberDao(): MemberDao
+    abstract fun settingsDao(): SettingsDao
 
     companion object {
         private const val TAG = "BookkeepingDatabase"
@@ -124,6 +126,28 @@ abstract class BookkeepingDatabase : RoomDatabase() {
             }
         }
 
+        private val MIGRATION_4_5 = object : Migration(4, 5) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                // 创建设置表
+                db.execSQL("""
+                    CREATE TABLE IF NOT EXISTS settings (
+                        id INTEGER PRIMARY KEY NOT NULL DEFAULT 1,
+                        monthStartDay INTEGER NOT NULL DEFAULT 1,
+                        themeMode TEXT NOT NULL DEFAULT 'FOLLOW_SYSTEM',
+                        autoBackupEnabled INTEGER NOT NULL DEFAULT 0,
+                        autoBackupInterval INTEGER NOT NULL DEFAULT 7,
+                        lastBackupTime INTEGER NOT NULL DEFAULT 0
+                    )
+                """)
+                
+                // 插入默认设置
+                db.execSQL("""
+                    INSERT OR IGNORE INTO settings (id, monthStartDay, themeMode, autoBackupEnabled, autoBackupInterval, lastBackupTime)
+                    VALUES (1, 1, 'FOLLOW_SYSTEM', 0, 7, 0)
+                """)
+            }
+        }
+
         @Volatile
         private var INSTANCE: BookkeepingDatabase? = null
 
@@ -134,7 +158,7 @@ abstract class BookkeepingDatabase : RoomDatabase() {
                     BookkeepingDatabase::class.java,
                     "bookkeeping_database"
                 )
-                    .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4)
+                    .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4, MIGRATION_4_5)
                     .addCallback(object : Callback() {
                         override fun onCreate(db: SupportSQLiteDatabase) {
                             super.onCreate(db)
@@ -143,6 +167,11 @@ abstract class BookkeepingDatabase : RoomDatabase() {
                                 try {
                                     val database = getDatabase(context)
                                     
+                                    // 初始化默认设置
+                                    database.settingsDao().apply {
+                                        updateSettings(Settings())
+                                    }
+                                    
                                     // 初始化默认成员
                                     database.memberDao().apply {
                                         if (getMemberCount() == 0) {

app/src/main/java/com/yovinchen/bookkeeping/data/SettingsDao.kt

@@ -0,0 +1,32 @@
+package com.yovinchen.bookkeeping.data
+
+import androidx.room.*
+import com.yovinchen.bookkeeping.model.Settings
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface SettingsDao {
+    @Query("SELECT * FROM settings WHERE id = 1")
+    fun getSettings(): Flow<Settings?>
+    
+    @Query("SELECT * FROM settings WHERE id = 1")
+    suspend fun getSettingsOnce(): Settings?
+    
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun updateSettings(settings: Settings)
+    
+    @Query("UPDATE settings SET monthStartDay = :day WHERE id = 1")
+    suspend fun updateMonthStartDay(day: Int)
+    
+    @Query("UPDATE settings SET themeMode = :mode WHERE id = 1")
+    suspend fun updateThemeMode(mode: String)
+    
+    @Query("UPDATE settings SET autoBackupEnabled = :enabled WHERE id = 1")
+    suspend fun updateAutoBackupEnabled(enabled: Boolean)
+    
+    @Query("UPDATE settings SET autoBackupInterval = :interval WHERE id = 1")
+    suspend fun updateAutoBackupInterval(interval: Int)
+    
+    @Query("UPDATE settings SET lastBackupTime = :time WHERE id = 1")
+    suspend fun updateLastBackupTime(time: Long)
+}

app/src/main/java/com/yovinchen/bookkeeping/data/SettingsRepository.kt

@@ -0,0 +1,45 @@
+package com.yovinchen.bookkeeping.data
+
+import com.yovinchen.bookkeeping.model.Settings
+import kotlinx.coroutines.flow.Flow
+
+class SettingsRepository(private val settingsDao: SettingsDao) {
+    
+    fun getSettings(): Flow<Settings?> = settingsDao.getSettings()
+    
+    suspend fun getSettingsOnce(): Settings {
+        return settingsDao.getSettingsOnce() ?: Settings()
+    }
+    
+    suspend fun updateSettings(settings: Settings) {
+        settingsDao.updateSettings(settings)
+    }
+    
+    suspend fun updateMonthStartDay(day: Int) {
+        // 确保日期在有效范围内 (1-28)
+        val validDay = day.coerceIn(1, 28)
+        settingsDao.updateMonthStartDay(validDay)
+    }
+    
+    suspend fun updateThemeMode(mode: String) {
+        settingsDao.updateThemeMode(mode)
+    }
+    
+    suspend fun updateAutoBackupEnabled(enabled: Boolean) {
+        settingsDao.updateAutoBackupEnabled(enabled)
+    }
+    
+    suspend fun updateAutoBackupInterval(interval: Int) {
+        settingsDao.updateAutoBackupInterval(interval)
+    }
+    
+    suspend fun updateLastBackupTime(time: Long) {
+        settingsDao.updateLastBackupTime(time)
+    }
+    
+    suspend fun ensureSettingsExist() {
+        if (settingsDao.getSettingsOnce() == null) {
+            settingsDao.updateSettings(Settings())
+        }
+    }
+}

app/src/main/java/com/yovinchen/bookkeeping/model/Settings.kt

@@ -0,0 +1,14 @@
+package com.yovinchen.bookkeeping.model
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "settings")
+data class Settings(
+    @PrimaryKey val id: Int = 1,
+    val monthStartDay: Int = 1, // 月度开始日期，1-28，默认为1号
+    val themeMode: String = "FOLLOW_SYSTEM", // 主题模式：FOLLOW_SYSTEM, LIGHT, DARK
+    val autoBackupEnabled: Boolean = false, // 自动备份开关
+    val autoBackupInterval: Int = 7, // 自动备份间隔（天）
+    val lastBackupTime: Long = 0L // 上次备份时间
+)

app/src/main/java/com/yovinchen/bookkeeping/ui/screen/SettingsScreen.kt

@@ -4,13 +4,19 @@ import android.content.Context
 import android.widget.Toast
 import androidx.activity.ComponentActivity
 import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.grid.GridCells
+import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
+import androidx.compose.foundation.lazy.grid.items
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.yovinchen.bookkeeping.model.ThemeMode
@@ -36,7 +42,10 @@ fun SettingsScreen(
     val categories by viewModel.categories.collectAsState()
     val selectedType by viewModel.selectedCategoryType.collectAsState()
     val members by memberViewModel.allMembers.collectAsState(initial = emptyList())
+    val monthStartDay by viewModel.monthStartDay.collectAsState()
     val context = LocalContext.current
+    
+    var showMonthStartDayDialog by remember { mutableStateOf(false) }
 
     Column(modifier = Modifier.fillMaxSize()) {
         // 成员管理设置项
@@ -81,6 +90,15 @@ fun SettingsScreen(
             },
             modifier = Modifier.clickable { showThemeDialog = true }
         )
+        
+        HorizontalDivider()
+        
+        // 月度开始日期设置项
+        ListItem(
+            headlineContent = { Text("月度开始日期") },
+            supportingContent = { Text("每月从${monthStartDay}号开始计算") },
+            modifier = Modifier.clickable { showMonthStartDayDialog = true }
+        )
 
         if (showThemeDialog) {
             AlertDialog(
@@ -144,6 +162,76 @@ fun SettingsScreen(
                 }
             )
         }
+        
+        // 月度开始日期对话框
+        if (showMonthStartDayDialog) {
+            AlertDialog(
+                onDismissRequest = { showMonthStartDayDialog = false },
+                title = { Text("选择月度开始日期") },
+                text = {
+                    Column {
+                        Text("选择每月记账的开始日期（1-28号）")
+                        Spacer(modifier = Modifier.height(16.dp))
+                        
+                        // 日期选择器
+                        val days = (1..28).toList()
+                        LazyVerticalGrid(
+                            columns = GridCells.Fixed(7),
+                            modifier = Modifier.fillMaxWidth().height(280.dp),
+                            contentPadding = PaddingValues(4.dp),
+                            verticalArrangement = Arrangement.spacedBy(4.dp),
+                            horizontalArrangement = Arrangement.spacedBy(4.dp)
+                        ) {
+                            items(days) { day ->
+                                Surface(
+                                    onClick = {
+                                        viewModel.setMonthStartDay(day)
+                                        showMonthStartDayDialog = false
+                                    },
+                                    shape = RoundedCornerShape(8.dp),
+                                    color = if (day == monthStartDay) {
+                                        MaterialTheme.colorScheme.primaryContainer
+                                    } else {
+                                        MaterialTheme.colorScheme.surface
+                                    },
+                                    border = BorderStroke(
+                                        width = 1.dp,
+                                        color = if (day == monthStartDay) {
+                                            MaterialTheme.colorScheme.primary
+                                        } else {
+                                            MaterialTheme.colorScheme.outline
+                                        }
+                                    ),
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .aspectRatio(1f)
+                                ) {
+                                    Box(
+                                        contentAlignment = Alignment.Center,
+                                        modifier = Modifier.fillMaxSize()
+                                    ) {
+                                        Text(
+                                            text = day.toString(),
+                                            style = MaterialTheme.typography.bodyMedium,
+                                            color = if (day == monthStartDay) {
+                                                MaterialTheme.colorScheme.onPrimaryContainer
+                                            } else {
+                                                MaterialTheme.colorScheme.onSurface
+                                            }
+                                        )
+                                    }
+                                }
+                            }
+                        }
+                    }
+                },
+                confirmButton = {
+                    TextButton(onClick = { showMonthStartDayDialog = false }) {
+                        Text("取消")
+                    }
+                }
+            )
+        }
 
         // 备份对话框
         if (showBackupDialog) {

app/src/main/java/com/yovinchen/bookkeeping/utils/DateUtils.kt

@@ -0,0 +1,85 @@
+package com.yovinchen.bookkeeping.utils
+
+import java.time.LocalDate
+import java.time.YearMonth
+import java.time.ZoneId
+import java.util.Date
+
+object DateUtils {
+    
+    /**
+     * 根据月度开始日期计算给定日期所属的记账月份
+     * @param date 要判断的日期
+     * @param monthStartDay 月度开始日期（1-28）
+     * @return 该日期所属的记账月份
+     */
+    fun getAccountingMonth(date: Date, monthStartDay: Int): YearMonth {
+        val localDate = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate()
+        return getAccountingMonth(localDate, monthStartDay)
+    }
+    
+    /**
+     * 根据月度开始日期计算给定日期所属的记账月份
+     * @param date 要判断的日期
+     * @param monthStartDay 月度开始日期（1-28）
+     * @return 该日期所属的记账月份
+     */
+    fun getAccountingMonth(date: LocalDate, monthStartDay: Int): YearMonth {
+        val dayOfMonth = date.dayOfMonth
+        
+        return if (dayOfMonth >= monthStartDay) {
+            // 当前日期大于等于开始日期，属于当前月
+            YearMonth.from(date)
+        } else {
+            // 当前日期小于开始日期，属于上个月
+            YearMonth.from(date.minusMonths(1))
+        }
+    }
+    
+    /**
+     * 获取记账月份的开始日期
+     * @param yearMonth 记账月份
+     * @param monthStartDay 月度开始日期（1-28）
+     * @return 该记账月份的开始日期
+     */
+    fun getMonthStartDate(yearMonth: YearMonth, monthStartDay: Int): LocalDate {
+        return yearMonth.atDay(monthStartDay)
+    }
+    
+    /**
+     * 获取记账月份的结束日期
+     * @param yearMonth 记账月份
+     * @param monthStartDay 月度开始日期（1-28）
+     * @return 该记账月份的结束日期
+     */
+    fun getMonthEndDate(yearMonth: YearMonth, monthStartDay: Int): LocalDate {
+        val nextMonth = yearMonth.plusMonths(1)
+        return nextMonth.atDay(monthStartDay).minusDays(1)
+    }
+    
+    /**
+     * 检查日期是否在指定的记账月份内
+     * @param date 要检查的日期
+     * @param yearMonth 记账月份
+     * @param monthStartDay 月度开始日期（1-28）
+     * @return 是否在该记账月份内
+     */
+    fun isInAccountingMonth(date: Date, yearMonth: YearMonth, monthStartDay: Int): Boolean {
+        val localDate = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate()
+        return isInAccountingMonth(localDate, yearMonth, monthStartDay)
+    }
+    
+    /**
+     * 检查日期是否在指定的记账月份内
+     * @param date 要检查的日期
+     * @param yearMonth 记账月份
+     * @param monthStartDay 月度开始日期（1-28）
+     * @return 是否在该记账月份内
+     */
+    fun isInAccountingMonth(date: LocalDate, yearMonth: YearMonth, monthStartDay: Int): Boolean {
+        val startDate = getMonthStartDate(yearMonth, monthStartDay)
+        val endDate = getMonthEndDate(yearMonth, monthStartDay)
+        
+        return date >= startDate && date <= endDate
+    }
+}

app/src/main/java/com/yovinchen/bookkeeping/viewmodel/AnalysisViewModel.kt

@@ -4,21 +4,22 @@ import android.app.Application
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
 import com.yovinchen.bookkeeping.data.BookkeepingDatabase
+import com.yovinchen.bookkeeping.data.SettingsRepository
 import com.yovinchen.bookkeeping.model.AnalysisType
 import com.yovinchen.bookkeeping.model.BookkeepingRecord
 import com.yovinchen.bookkeeping.model.CategoryStat
 import com.yovinchen.bookkeeping.model.MemberStat
 import com.yovinchen.bookkeeping.model.TransactionType
+import com.yovinchen.bookkeeping.utils.DateUtils
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
-import java.time.LocalDateTime
 import java.time.YearMonth
-import java.time.ZoneId
 import java.util.*
 
 class AnalysisViewModel(application: Application) : AndroidViewModel(application) {
     private val recordDao = BookkeepingDatabase.getDatabase(application).bookkeepingDao()
     private val memberDao = BookkeepingDatabase.getDatabase(application).memberDao()
+    private val settingsRepository = SettingsRepository(BookkeepingDatabase.getDatabase(application).settingsDao())
 
     private val _startMonth = MutableStateFlow(YearMonth.now())
     val startMonth: StateFlow<YearMonth> = _startMonth.asStateFlow()
@@ -38,16 +39,41 @@ class AnalysisViewModel(application: Application) : AndroidViewModel(application
     private val _records = MutableStateFlow<List<BookkeepingRecord>>(emptyList())
     val records: StateFlow<List<BookkeepingRecord>> = _records.asStateFlow()
 
+    // 存储月度开始日期设置
+    private val _monthStartDay = MutableStateFlow(1)
+    val monthStartDay: StateFlow<Int> = _monthStartDay.asStateFlow()
+
     init {
+        // 订阅设置变化，获取月度开始日期
         viewModelScope.launch {
-            combine(startMonth, endMonth, selectedAnalysisType) { start, end, type ->
+            settingsRepository.getSettings().collect { settings ->
-                Triple(start, end, type)
+                _monthStartDay.value = settings?.monthStartDay ?: 1
-            }.collect { (start, end, type) ->
+            }
-                updateStats(start, end, type)
+        }
+        
+        // 当月度开始日期、起始月份、结束月份或分析类型变化时，更新统计数据
+        viewModelScope.launch {
+            combine(
+                startMonth, 
+                endMonth, 
+                selectedAnalysisType,
+                monthStartDay
+            ) { start, end, type, startDay ->
+                UpdateParams(start, end, type, startDay)
+            }.collect { params ->
+                updateStats(params.start, params.end, params.type, params.startDay)
             }
         }
     }
 
+    // 用于传递更新参数的数据类
+    private data class UpdateParams(
+        val start: YearMonth,
+        val end: YearMonth,
+        val type: AnalysisType,
+        val startDay: Int
+    )
+
     fun setStartMonth(month: YearMonth) {
         _startMonth.value = month
     }
@@ -60,16 +86,16 @@ class AnalysisViewModel(application: Application) : AndroidViewModel(application
         _selectedAnalysisType.value = type
     }
 
-    private suspend fun updateStats(startMonth: YearMonth, endMonth: YearMonth, type: AnalysisType) {
+    private suspend fun updateStats(startMonth: YearMonth, endMonth: YearMonth, type: AnalysisType, monthStartDay: Int) {
         val records = recordDao.getAllRecords().first()
         
-        // 过滤日期范围内的记录
+        // 使用 DateUtils 过滤日期范围内的记录
-        val monthRecords = records.filter {
+        val monthRecords = records.filter { record ->
-            val recordDate = Date(it.date.time)
+            val recordDate = Date(record.date.time)
-            val localDateTime = LocalDateTime.ofInstant(recordDate.toInstant(), ZoneId.systemDefault())
+            val accountingMonth = DateUtils.getAccountingMonth(recordDate, monthStartDay)
-            val yearMonth = YearMonth.from(localDateTime)
+            
-            yearMonth.isAfter(startMonth.minusMonths(1)) && 
+            // 检查记账月份是否在选定的范围内
-            yearMonth.isBefore(endMonth.plusMonths(1))
+            accountingMonth >= startMonth && accountingMonth <= endMonth
         }
 
         // 更新记录数据

app/src/main/java/com/yovinchen/bookkeeping/viewmodel/HomeViewModel.kt

@@ -4,10 +4,12 @@ import android.app.Application
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
 import com.yovinchen.bookkeeping.data.BookkeepingDatabase
+import com.yovinchen.bookkeeping.data.SettingsRepository
 import com.yovinchen.bookkeeping.model.BookkeepingRecord
 import com.yovinchen.bookkeeping.model.Category
 import com.yovinchen.bookkeeping.model.Member
 import com.yovinchen.bookkeeping.model.TransactionType
+import com.yovinchen.bookkeeping.utils.DateUtils
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
@@ -18,9 +20,26 @@ import java.util.*
 
 @OptIn(ExperimentalCoroutinesApi::class)
 class HomeViewModel(application: Application) : AndroidViewModel(application) {
-    private val bookkeepingDao = BookkeepingDatabase.getDatabase(application).bookkeepingDao()
+    private val database = BookkeepingDatabase.getDatabase(application)
-    private val memberDao = BookkeepingDatabase.getDatabase(application).memberDao()
+    private val bookkeepingDao = database.bookkeepingDao()
-    private val categoryDao = BookkeepingDatabase.getDatabase(application).categoryDao()
+    private val memberDao = database.memberDao()
+    private val categoryDao = database.categoryDao()
+    private val settingsRepository = SettingsRepository(database.settingsDao())
+    
+    // 设置相关
+    private val _monthStartDay = MutableStateFlow(1)
+    val monthStartDay: StateFlow<Int> = _monthStartDay.asStateFlow()
+    
+    init {
+        viewModelScope.launch {
+            settingsRepository.ensureSettingsExist()
+            settingsRepository.getSettings().collect { settings ->
+                settings?.let {
+                    _monthStartDay.value = it.monthStartDay
+                }
+            }
+        }
+    }
 
     private val _selectedRecordType = MutableStateFlow<TransactionType?>(null)
     val selectedRecordType: StateFlow<TransactionType?> = _selectedRecordType.asStateFlow()
@@ -56,17 +75,13 @@ class HomeViewModel(application: Application) : AndroidViewModel(application) {
         allRecords,
         _selectedRecordType,
         _selectedMonth,
-        _selectedMember
+        _selectedMember,
-    ) { records, selectedType, selectedMonth, selectedMember ->
+        _monthStartDay
+    ) { records, selectedType, selectedMonth, selectedMember, monthStartDay ->
         records
             .filter { record ->
-                val recordDate = record.date.toInstant()
-                    .atZone(ZoneId.systemDefault())
-                    .toLocalDate()
-                val recordYearMonth = YearMonth.from(recordDate)
-
                 val typeMatches = selectedType?.let { record.type == it } ?: true
-                val monthMatches = recordYearMonth == selectedMonth
+                val monthMatches = DateUtils.isInAccountingMonth(record.date, selectedMonth, monthStartDay)
                 val memberMatches = selectedMember?.let { record.memberId == it.id } ?: true
 
                 monthMatches && memberMatches && typeMatches
@@ -90,16 +105,12 @@ class HomeViewModel(application: Application) : AndroidViewModel(application) {
     val totalIncome = combine(
         allRecords,
         _selectedMonth,
-        _selectedMember
+        _selectedMember,
-    ) { records, selectedMonth, selectedMember ->
+        _monthStartDay
+    ) { records, selectedMonth, selectedMember, monthStartDay ->
         records
             .filter { record ->
-                val recordDate = record.date.toInstant()
+                val monthMatches = DateUtils.isInAccountingMonth(record.date, selectedMonth, monthStartDay)
-                    .atZone(ZoneId.systemDefault())
-                    .toLocalDate()
-                val recordYearMonth = YearMonth.from(recordDate)
-                
-                val monthMatches = recordYearMonth == selectedMonth
                 val memberMatches = selectedMember?.let { record.memberId == it.id } ?: true
                 val typeMatches = record.type == TransactionType.INCOME
 
@@ -115,16 +126,12 @@ class HomeViewModel(application: Application) : AndroidViewModel(application) {
     val totalExpense = combine(
         allRecords,
         _selectedMonth,
-        _selectedMember
+        _selectedMember,
-    ) { records, selectedMonth, selectedMember ->
+        _monthStartDay
+    ) { records, selectedMonth, selectedMember, monthStartDay ->
         records
             .filter { record ->
-                val recordDate = record.date.toInstant()
+                val monthMatches = DateUtils.isInAccountingMonth(record.date, selectedMonth, monthStartDay)
-                    .atZone(ZoneId.systemDefault())
-                    .toLocalDate()
-                val recordYearMonth = YearMonth.from(recordDate)
-                
-                val monthMatches = recordYearMonth == selectedMonth
                 val memberMatches = selectedMember?.let { record.memberId == it.id } ?: true
                 val typeMatches = record.type == TransactionType.EXPENSE
 

app/src/main/java/com/yovinchen/bookkeeping/viewmodel/SettingsViewModel.kt

@@ -9,8 +9,10 @@ import androidx.lifecycle.viewModelScope
 import com.opencsv.CSVReader
 import com.opencsv.CSVWriter
 import com.yovinchen.bookkeeping.data.BookkeepingDatabase
+import com.yovinchen.bookkeeping.data.SettingsRepository
 import com.yovinchen.bookkeeping.model.BookkeepingRecord
 import com.yovinchen.bookkeeping.model.Category
+import com.yovinchen.bookkeeping.model.Settings
 import com.yovinchen.bookkeeping.model.TransactionType
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
@@ -38,8 +40,36 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     private val database = BookkeepingDatabase.getDatabase(application)
     private val dao = database.bookkeepingDao()
     private val memberDao = database.memberDao()
+    private val settingsRepository = SettingsRepository(database.settingsDao())
+    
+    // 设置相关的状态
+    val settings: StateFlow<Settings?> = settingsRepository.getSettings()
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5000),
+            initialValue = null
+        )
+    
     private val _isAutoBackupEnabled = MutableStateFlow(false)
     val isAutoBackupEnabled: StateFlow<Boolean> = _isAutoBackupEnabled.asStateFlow()
+    
+    private val _monthStartDay = MutableStateFlow(1)
+    val monthStartDay: StateFlow<Int> = _monthStartDay.asStateFlow()
+    
+    init {
+        viewModelScope.launch {
+            // 确保设置存在
+            settingsRepository.ensureSettingsExist()
+            
+            // 监听设置变化
+            settings.collect { settings ->
+                settings?.let {
+                    _isAutoBackupEnabled.value = it.autoBackupEnabled
+                    _monthStartDay.value = it.monthStartDay
+                }
+            }
+        }
+    }
 
     private val _selectedCategoryType = MutableStateFlow(TransactionType.EXPENSE)
     val selectedCategoryType: StateFlow<TransactionType> = _selectedCategoryType.asStateFlow()
@@ -85,11 +115,19 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     fun setAutoBackup(enabled: Boolean) {
         viewModelScope.launch {
             _isAutoBackupEnabled.value = enabled
+            settingsRepository.updateAutoBackupEnabled(enabled)
             if (enabled) {
                 schedulePeriodicBackup()
             }
         }
     }
+    
+    fun setMonthStartDay(day: Int) {
+        viewModelScope.launch {
+            _monthStartDay.value = day
+            settingsRepository.updateMonthStartDay(day)
+        }
+    }
 
     private fun schedulePeriodicBackup() {
         viewModelScope.launch(Dispatchers.IO) {