docs: 更新README文档，突出项目功能亮点

- 新增"功能亮点"部分，重点展示已完成的核心功能
  - 智能数据分析：月度/年度报表、详细分析、多维度统计
  - 预算管理系统：多层级预算、实时监控、灵活配置
  - 数据安全保障：备份加密、离线优先、隐私保护
  - 现代化设计：Material 3、深色模式、响应式布局
- 更新主要特性，标注预算管理为"基本完成"
- 更新v1.5版本历史，记录崩溃修复和功能优化
- 优化文档结构，提升可读性和专业度

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/settings.local.json

@@ -0,0 +1,12 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(./gradlew:*)",
+      "Bash(git push:*)",
+      "Bash(git branch:*)",
+      "Bash(git add:*)",
+      "Bash(git commit:*)"
+    ],
+    "deny": []
+  }
+}

.idea/AndroidProjectSystem.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AndroidProjectSystem">
+    <option name="providerId" value="com.android.tools.idea.GradleProjectSystem" />
+  </component>
+</project>

.idea/inspectionProfiles/Project_Default.xml

@@ -49,6 +49,9 @@
       <option name="composableFile" value="true" />
       <option name="previewFile" value="true" />
     </inspection_tool>
+    <inspection_tool class="PreviewParameterProviderOnFirstParameter" enabled="true" level="ERROR" enabled_by_default="true">
+      <option name="composableFile" value="true" />
+    </inspection_tool>
     <inspection_tool class="PreviewPickerAnnotation" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
       <option name="previewFile" value="true" />

CLAUDE.md

@@ -0,0 +1,117 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## 项目概述
+
+轻记账是一个使用 Kotlin 和 Jetpack Compose 开发的 Android 记账应用，采用 MVVM 架构。项目强调隐私保护，完全离线运行。
+
+## 常用命令
+
+### 构建和运行
+```bash
+./gradlew build              # 构建项目
+./gradlew assembleDebug      # 构建调试 APK
+./gradlew assembleRelease    # 构建发布 APK
+./gradlew installDebug       # 安装调试版本到设备
+./gradlew clean             # 清理构建产物
+```
+
+### 测试相关
+```bash
+./gradlew test              # 运行单元测试
+./gradlew connectedAndroidTest  # 运行设备测试
+```
+
+## 架构概览
+
+### MVVM 架构分层
+- **Model 层**: Room 数据库实体 (`model/` 目录下的 BookkeepingRecord, Category, Member, Settings)
+- **Data 层**: DAO 接口和 Repository 模式实现数据访问
+- **ViewModel 层**: 每个功能模块独立的 ViewModel (HomeViewModel, AnalysisViewModel 等)
+- **View 层**: Jetpack Compose UI，包含 screens、components 和 dialogs
+
+### 核心数据流
+1. UI 层通过 ViewModel 发起数据请求
+2. ViewModel 调用 Repository 获取数据
+3. Repository 通过 DAO 访问 Room 数据库
+4. 数据通过 Flow/StateFlow 响应式传递回 UI
+
+### 数据库架构
+- **主数据库**: BookkeepingDatabase (当前版本 5)
+- **核心表**: bookkeeping_records, categories, members, settings
+- **关键关系**: records 通过 memberId 关联 members 表
+- **迁移策略**: 使用 Room 的 Migration 机制处理版本升级
+
+### 导航架构
+使用 Jetpack Navigation Compose，主要页面：
+- HomeScreen: 主页记账列表
+- AnalysisScreen: 数据分析图表
+- AddRecordScreen: 添加/编辑记录
+- CategoryManagementScreen: 分类管理
+- MemberManagementScreen: 成员管理
+- SettingsScreen: 设置页面
+
+## 关键技术决策
+
+### UI 框架
+- 完全使用 Jetpack Compose 构建 UI
+- Material 3 设计系统，支持深色/浅色主题
+- 自定义主题色功能通过 ColorThemeDialog 实现
+
+### 数据可视化
+- 使用 MPAndroidChart 实现图表功能
+- ChartManager 统一管理图表样式和行为
+- 支持饼图和折线图两种展示方式
+
+### 文件导入导出
+- Apache POI 处理 Excel 文件
+- OpenCSV 处理 CSV 文件
+- FileUtils 提供统一的文件操作接口
+
+### 图标系统
+- 所有图标使用 Material Icons 和自定义矢量图标
+- CategoryIcon 和 MemberIcon 枚举管理图标映射
+- 支持动态图标选择和预览
+
+## 开发注意事项
+
+### 分支策略
+- master: 稳定主分支
+- develop: 开发分支
+- feature/*: 功能开发
+- release/*: 版本发布
+- hotfix/*: 紧急修复
+
+### 提交规范
+使用约定式提交: `<type>: <description>`
+- feat: 新功能
+- fix: 修复 bug
+- docs: 文档更新
+- style: 代码格式
+- refactor: 代码重构
+- perf: 性能优化
+- test: 测试相关
+- build: 构建相关
+
+### 重要功能模块
+
+#### 月度记账开始日期 (Settings 中的 monthStartDay)
+- 支持自定义每月记账的开始日期 (1-31)
+- 影响月度统计和分析的日期范围计算
+- 默认值为 1 (每月 1 日开始)
+
+#### 加密功能 (EncryptionUtils)
+- 预留的备份加密功能接口
+- 使用 AES 加密算法
+- 目前尚未集成到备份功能中
+
+#### 默认数据初始化
+- 首次启动时自动创建默认分类
+- 包含常用的收入和支出分类
+- 可通过 insertDefaultCategories() 查看默认分类列表
+
+### 性能考虑
+- 使用 Room 的 Flow 实现数据的响应式更新
+- 图表数据计算在 ViewModel 中异步处理
+- 大量数据导入时使用批量插入优化性能

README.md

@@ -6,6 +6,28 @@
 
 本项目是一个使用 Kotlin 和 Jetpack Compose 开发的 Android 记账应用，采用 MVVM 架构，提供简洁直观的用户界面和丰富的记账功能。
 
+## 🔥 功能亮点
+
+### 📊 智能数据分析
+- **月度/年度报表**：收支对比、储蓄率、日均消费等关键指标
+- **详细分析报表**：分类统计明细、TOP排行榜、可视化进度条
+- **多维度统计**：支持按分类、成员、时间等多维度数据分析
+
+### 💼 预算管理系统
+- **多层级预算**：支持总预算、分类预算、成员预算
+- **实时监控**：预算使用情况可视化，超支警告提醒
+- **灵活配置**：可启用/禁用预算，自定义预警阈值
+
+### 🔐 数据安全保障
+- **备份加密**：使用 Android Keystore 加密导出文件
+- **离线优先**：完全本地存储，无网络依赖
+- **隐私保护**：极简权限，数据完全掌控
+
+### 🎨 现代化设计
+- **Material 3**：遵循最新设计规范
+- **深色模式**：支持系统主题切换
+- **响应式布局**：适配不同屏幕尺寸
+
 ## ⭐️ 主要特性
 
 - 🔒 完全离线运行，无需网络连接
@@ -13,6 +35,10 @@
 - 💰 支持收入和支出记录
 - 👥 支持多人记账
 - 📊 按日期和类别统计
+- 🔐 备份文件加密保护
+- 📅 自定义月度记账周期
+- 💼 预算管理（基本完成）
+- 📈 详细数据分析报表
 
 ## 🛠 技术栈
 
@@ -32,7 +58,7 @@
 - [x] Material 3 设计界面
 - [x] 深色/浅色主题切换
 - [x] 主题色自定义
-- [ ] 月度记账开始日期
+- [x] 月度记账开始日期
 
 ### 1. 成员系统 (已完成 🎉)
 - [x] 成员添加/编辑/删除
@@ -43,7 +69,7 @@
 ### 2. 图表分析 (已完成 🎉)
 - [x] 支出/收入趋势图表
 - [x] 分类占比饼图
-- [ ] 月度/年度报表
+- [x] 月度/年度报表
 - [x] 成员消费分析
 - [x] 自定义统计周期
 
@@ -59,24 +85,26 @@
 - [x] 收入类图标 (工资、奖金、理财等)
 - [x] 成员图标 (家人、朋友、同事等)
 
-### 4. 数据管理 (进行中 🚀)
+### 4. 数据管理 (已完成 🎉)
 - [x] 导出 CSV/Excel 功能
 - [x] 数据导入
 - [x] 数据迁移工具
 - [x] 定期自动备份
-- [ ] 备份加密功能
+- [x] 备份加密功能
 
-### 5. 预算管理 (计划中 💡)
+### 5. 预算管理 (基本完成 ✨)
-- [ ] 月度预算设置
+- [x] 预算数据模型设计
+- [x] 数据库架构实现
+- [x] 预算管理界面
+- [x] 月度预算设置
 - [ ] 预算超支提醒
-- [ ] 分类预算管理
+- [x] 分类预算管理
-- [ ] 成员预算管理
+- [x] 成员预算管理
 - [ ] 预算分析报告
 
 ### 6. 体验优化 (持续进行 🔄)
 - [x] 深色模式支持
 - [ ] 手势操作优化
-- [ ] 快速记账小组件
 - [ ] 多语言支持
 - [ ] 自定义主题
 
@@ -116,6 +144,33 @@
 
 ## 📝 版本历史
 
+### v1.5 (开发中)
+- 预算管理功能
+  - 预算数据模型设计
+  - 支持总预算、分类预算、成员预算
+  - 数据库架构实现（升级到版本6）
+  - 预算管理界面设计
+  - 预算编辑对话框
+  - 预算状态可视化（进度条、超支提醒）
+  - 预算导航集成
+- 数据分析优化
+  - 月度/年度报表组件
+  - 详细分析报表（分类统计明细）
+  - 收支对比、储蓄率、日均消费分析
+  - TOP分类排行榜（金银铜奖牌设计）
+  - 报表视图集成到分析页面
+  - 修复嵌套滚动组件崩溃问题
+
+### v1.4
+- 数据安全功能
+  - 备份文件加密（使用Android Keystore）
+  - 支持加密CSV/Excel导出
+  - 自动检测和解密加密备份
+  - 设置页面加密开关
+- 月度记账优化
+  - 自定义月度开始日期（1-28号）
+  - 所有统计基于自定义周期
+
 ### v1.3
 - 图标美化计划
   - 增加图标美化

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

@@ -10,6 +10,7 @@ import androidx.room.migration.Migration
 import androidx.sqlite.db.SupportSQLiteDatabase
 import com.yovinchen.bookkeeping.R
 import com.yovinchen.bookkeeping.model.BookkeepingRecord
+import com.yovinchen.bookkeeping.model.Budget
 import com.yovinchen.bookkeeping.model.Category
 import com.yovinchen.bookkeeping.model.Converters
 import com.yovinchen.bookkeeping.model.Member
@@ -20,8 +21,8 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
 @Database(
-    entities = [BookkeepingRecord::class, Category::class, Member::class, Settings::class],
+    entities = [BookkeepingRecord::class, Category::class, Member::class, Settings::class, Budget::class],
-    version = 5,
+    version = 6,
     exportSchema = false
 )
 @TypeConverters(Converters::class)
@@ -30,6 +31,7 @@ abstract class BookkeepingDatabase : RoomDatabase() {
     abstract fun categoryDao(): CategoryDao
     abstract fun memberDao(): MemberDao
     abstract fun settingsDao(): SettingsDao
+    abstract fun budgetDao(): BudgetDao
 
     companion object {
         private const val TAG = "BookkeepingDatabase"
@@ -147,6 +149,30 @@ abstract class BookkeepingDatabase : RoomDatabase() {
                 """)
             }
         }
+        
+        private val MIGRATION_5_6 = object : Migration(5, 6) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                // 创建预算表
+                db.execSQL("""
+                    CREATE TABLE IF NOT EXISTS budgets (
+                        id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                        type TEXT NOT NULL,
+                        categoryName TEXT,
+                        memberId INTEGER,
+                        amount REAL NOT NULL,
+                        startDate INTEGER NOT NULL,
+                        endDate INTEGER NOT NULL,
+                        isEnabled INTEGER NOT NULL DEFAULT 1,
+                        alertThreshold REAL NOT NULL DEFAULT 0.8,
+                        createdAt INTEGER NOT NULL,
+                        updatedAt INTEGER NOT NULL
+                    )
+                """)
+                
+                // 在 settings 表中添加 encryptBackup 列
+                db.execSQL("ALTER TABLE settings ADD COLUMN encryptBackup INTEGER NOT NULL DEFAULT 1")
+            }
+        }
 
         @Volatile
         private var INSTANCE: BookkeepingDatabase? = null
@@ -158,7 +184,7 @@ abstract class BookkeepingDatabase : RoomDatabase() {
                     BookkeepingDatabase::class.java,
                     "bookkeeping_database"
                 )
-                    .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4, MIGRATION_4_5)
+                    .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4, MIGRATION_4_5, MIGRATION_5_6)
                     .addCallback(object : Callback() {
                         override fun onCreate(db: SupportSQLiteDatabase) {
                             super.onCreate(db)

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

@@ -0,0 +1,105 @@
+package com.yovinchen.bookkeeping.data
+
+import androidx.room.*
+import com.yovinchen.bookkeeping.model.Budget
+import com.yovinchen.bookkeeping.model.BudgetType
+import kotlinx.coroutines.flow.Flow
+import java.util.Date
+
+/**
+ * 预算数据访问对象
+ * 提供预算相关的数据库操作接口
+ */
+@Dao
+interface BudgetDao {
+    
+    /**
+     * 插入新预算
+     */
+    @Insert
+    suspend fun insertBudget(budget: Budget): Long
+    
+    /**
+     * 更新预算
+     */
+    @Update
+    suspend fun updateBudget(budget: Budget)
+    
+    /**
+     * 删除预算
+     */
+    @Delete
+    suspend fun deleteBudget(budget: Budget)
+    
+    /**
+     * 根据ID获取预算
+     */
+    @Query("SELECT * FROM budgets WHERE id = :budgetId")
+    suspend fun getBudgetById(budgetId: Int): Budget?
+    
+    /**
+     * 获取所有启用的预算
+     */
+    @Query("SELECT * FROM budgets WHERE isEnabled = 1 ORDER BY type, amount DESC")
+    fun getAllEnabledBudgets(): Flow<List<Budget>>
+    
+    /**
+     * 获取所有预算（包括禁用的）
+     */
+    @Query("SELECT * FROM budgets ORDER BY type, amount DESC")
+    fun getAllBudgets(): Flow<List<Budget>>
+    
+    /**
+     * 根据类型获取预算
+     */
+    @Query("SELECT * FROM budgets WHERE type = :type AND isEnabled = 1")
+    fun getBudgetsByType(type: BudgetType): Flow<List<Budget>>
+    
+    /**
+     * 获取总预算
+     */
+    @Query("SELECT * FROM budgets WHERE type = 'TOTAL' AND isEnabled = 1 AND :date BETWEEN startDate AND endDate LIMIT 1")
+    suspend fun getTotalBudget(date: Date): Budget?
+    
+    /**
+     * 获取指定分类的预算
+     */
+    @Query("SELECT * FROM budgets WHERE type = 'CATEGORY' AND categoryName = :categoryName AND isEnabled = 1 AND :date BETWEEN startDate AND endDate LIMIT 1")
+    suspend fun getCategoryBudget(categoryName: String, date: Date): Budget?
+    
+    /**
+     * 获取指定成员的预算
+     */
+    @Query("SELECT * FROM budgets WHERE type = 'MEMBER' AND memberId = :memberId AND isEnabled = 1 AND :date BETWEEN startDate AND endDate LIMIT 1")
+    suspend fun getMemberBudget(memberId: Int, date: Date): Budget?
+    
+    /**
+     * 获取当前有效的所有预算
+     */
+    @Query("SELECT * FROM budgets WHERE isEnabled = 1 AND :date BETWEEN startDate AND endDate ORDER BY type, amount DESC")
+    fun getActiveBudgets(date: Date): Flow<List<Budget>>
+    
+    /**
+     * 更新预算的启用状态
+     */
+    @Query("UPDATE budgets SET isEnabled = :enabled, updatedAt = :updatedAt WHERE id = :budgetId")
+    suspend fun updateBudgetEnabled(budgetId: Int, enabled: Boolean, updatedAt: Date = Date())
+    
+    /**
+     * 删除所有过期的预算（可选）
+     */
+    @Query("DELETE FROM budgets WHERE endDate < :date AND isEnabled = 0")
+    suspend fun deleteExpiredBudgets(date: Date)
+    
+    /**
+     * 获取指定日期范围内的分类预算
+     */
+    @Query("SELECT * FROM budgets WHERE type = 'CATEGORY' AND isEnabled = 1 AND :date BETWEEN startDate AND endDate")
+    fun getCategoryBudgetsForDate(date: Date): Flow<List<Budget>>
+    
+    /**
+     * 获取指定日期范围内的成员预算
+     */
+    @Query("SELECT * FROM budgets WHERE type = 'MEMBER' AND isEnabled = 1 AND :date BETWEEN startDate AND endDate")
+    fun getMemberBudgetsForDate(date: Date): Flow<List<Budget>>
+}

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

@@ -0,0 +1,215 @@
+package com.yovinchen.bookkeeping.data
+
+import com.yovinchen.bookkeeping.model.*
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import java.util.Date
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * 预算仓库类
+ * 提供预算相关的业务逻辑和数据访问
+ */
+class BudgetRepository(
+    private val budgetDao: BudgetDao,
+    private val bookkeepingDao: BookkeepingDao,
+    private val memberDao: MemberDao
+) {
+    
+    /**
+     * 创建新预算
+     */
+    suspend fun createBudget(budget: Budget): Long {
+        return budgetDao.insertBudget(budget)
+    }
+    
+    /**
+     * 更新预算
+     */
+    suspend fun updateBudget(budget: Budget) {
+        budgetDao.updateBudget(budget.copy(updatedAt = Date()))
+    }
+    
+    /**
+     * 删除预算
+     */
+    suspend fun deleteBudget(budget: Budget) {
+        budgetDao.deleteBudget(budget)
+    }
+    
+    /**
+     * 获取所有预算
+     */
+    fun getAllBudgets(): Flow<List<Budget>> {
+        return budgetDao.getAllBudgets()
+    }
+    
+    /**
+     * 获取所有启用的预算
+     */
+    fun getAllEnabledBudgets(): Flow<List<Budget>> {
+        return budgetDao.getAllEnabledBudgets()
+    }
+    
+    /**
+     * 获取当前有效的预算状态
+     */
+    fun getActiveBudgetStatuses(date: Date = Date()): Flow<List<BudgetStatus>> {
+        return combine(
+            budgetDao.getActiveBudgets(date),
+            bookkeepingDao.getAllRecords(),
+            memberDao.getAllMembers()
+        ) { budgets, records, members ->
+            budgets.map { budget ->
+                val spent = calculateSpent(budget, records, members, date)
+                val remaining = budget.amount - spent
+                val percentage = if (budget.amount > 0) spent / budget.amount else 0.0
+                
+                BudgetStatus(
+                    budget = budget,
+                    spent = spent,
+                    remaining = remaining,
+                    percentage = percentage,
+                    isOverBudget = spent > budget.amount,
+                    isNearLimit = percentage >= budget.alertThreshold
+                )
+            }
+        }
+    }
+    
+    /**
+     * 计算预算已花费金额
+     */
+    private fun calculateSpent(
+        budget: Budget,
+        records: List<BookkeepingRecord>,
+        members: List<Member>,
+        currentDate: Date
+    ): Double {
+        // 只计算支出类型的记录
+        val expenseRecords = records.filter { 
+            it.type == TransactionType.EXPENSE &&
+            it.date >= budget.startDate &&
+            it.date <= budget.endDate &&
+            it.date <= currentDate
+        }
+        
+        return when (budget.type) {
+            BudgetType.TOTAL -> {
+                // 总预算：计算所有支出
+                expenseRecords.sumOf { it.amount }
+            }
+            BudgetType.CATEGORY -> {
+                // 分类预算：计算指定分类的支出
+                expenseRecords
+                    .filter { it.category == budget.categoryName }
+                    .sumOf { it.amount }
+            }
+            BudgetType.MEMBER -> {
+                // 成员预算：计算指定成员的支出
+                expenseRecords
+                    .filter { it.memberId == budget.memberId }
+                    .sumOf { it.amount }
+            }
+        }
+    }
+    
+    /**
+     * 获取总预算状态
+     */
+    suspend fun getTotalBudgetStatus(date: Date = Date()): BudgetStatus? {
+        val budget = budgetDao.getTotalBudget(date) ?: return null
+        val records = bookkeepingDao.getAllRecords().first()
+        val members = memberDao.getAllMembers().first()
+        
+        val spent = calculateSpent(budget, records, members, date)
+        val remaining = budget.amount - spent
+        val percentage = if (budget.amount > 0) spent / budget.amount else 0.0
+        
+        return BudgetStatus(
+            budget = budget,
+            spent = spent,
+            remaining = remaining,
+            percentage = percentage,
+            isOverBudget = spent > budget.amount,
+            isNearLimit = percentage >= budget.alertThreshold
+        )
+    }
+    
+    /**
+     * 获取分类预算状态
+     */
+    fun getCategoryBudgetStatuses(date: Date = Date()): Flow<List<BudgetStatus>> {
+        return combine(
+            budgetDao.getCategoryBudgetsForDate(date),
+            bookkeepingDao.getAllRecords(),
+            memberDao.getAllMembers()
+        ) { budgets, records, members ->
+            budgets.map { budget ->
+                val spent = calculateSpent(budget, records, members, date)
+                val remaining = budget.amount - spent
+                val percentage = if (budget.amount > 0) spent / budget.amount else 0.0
+                
+                BudgetStatus(
+                    budget = budget,
+                    spent = spent,
+                    remaining = remaining,
+                    percentage = percentage,
+                    isOverBudget = spent > budget.amount,
+                    isNearLimit = percentage >= budget.alertThreshold
+                )
+            }
+        }
+    }
+    
+    /**
+     * 获取成员预算状态
+     */
+    fun getMemberBudgetStatuses(date: Date = Date()): Flow<List<BudgetStatus>> {
+        return combine(
+            budgetDao.getMemberBudgetsForDate(date),
+            bookkeepingDao.getAllRecords(),
+            memberDao.getAllMembers()
+        ) { budgets, records, members ->
+            budgets.map { budget ->
+                val spent = calculateSpent(budget, records, members, date)
+                val remaining = budget.amount - spent
+                val percentage = if (budget.amount > 0) spent / budget.amount else 0.0
+                
+                BudgetStatus(
+                    budget = budget,
+                    spent = spent,
+                    remaining = remaining,
+                    percentage = percentage,
+                    isOverBudget = spent > budget.amount,
+                    isNearLimit = percentage >= budget.alertThreshold
+                )
+            }
+        }
+    }
+    
+    /**
+     * 检查是否有预算超支或接近限制
+     */
+    suspend fun checkBudgetAlerts(date: Date = Date()): List<BudgetStatus> {
+        val allStatuses = getActiveBudgetStatuses(date).first()
+        return allStatuses.filter { it.isOverBudget || it.isNearLimit }
+    }
+    
+    /**
+     * 更新预算启用状态
+     */
+    suspend fun updateBudgetEnabled(budgetId: Int, enabled: Boolean) {
+        budgetDao.updateBudgetEnabled(budgetId, enabled)
+    }
+    
+    /**
+     * 清理过期的禁用预算
+     */
+    suspend fun cleanupExpiredBudgets() {
+        budgetDao.deleteExpiredBudgets(Date())
+    }
+}

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

@@ -1,6 +1,7 @@
 package com.yovinchen.bookkeeping.data
 
 import androidx.room.TypeConverter
+import com.yovinchen.bookkeeping.model.BudgetType
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
 import java.util.*
@@ -29,4 +30,14 @@ class Converters {
     fun toDate(timestamp: String?): Date? {
         return timestamp?.let { Date(it.toLong()) }
     }
+    
+    @TypeConverter
+    fun fromBudgetType(budgetType: BudgetType?): String? {
+        return budgetType?.name
+    }
+    
+    @TypeConverter
+    fun toBudgetType(budgetType: String?): BudgetType? {
+        return budgetType?.let { BudgetType.valueOf(it) }
+    }
 }

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

@@ -29,4 +29,7 @@ interface SettingsDao {
     
     @Query("UPDATE settings SET lastBackupTime = :time WHERE id = 1")
     suspend fun updateLastBackupTime(time: Long)
+    
+    @Query("UPDATE settings SET encryptBackup = :encrypt WHERE id = 1")
+    suspend fun updateEncryptBackup(encrypt: Boolean)
 }

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

@@ -0,0 +1,86 @@
+package com.yovinchen.bookkeeping.model
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import java.util.Date
+
+/**
+ * 预算实体类
+ * 用于设置和跟踪月度预算、分类预算和成员预算
+ */
+@Entity(tableName = "budgets")
+data class Budget(
+    @PrimaryKey(autoGenerate = true)
+    val id: Int = 0,
+    
+    /**
+     * 预算类型：TOTAL（总预算）, CATEGORY（分类预算）, MEMBER（成员预算）
+     */
+    val type: BudgetType,
+    
+    /**
+     * 预算关联的分类名称（仅在 type 为 CATEGORY 时使用）
+     */
+    val categoryName: String? = null,
+    
+    /**
+     * 预算关联的成员ID（仅在 type 为 MEMBER 时使用）
+     */
+    val memberId: Int? = null,
+    
+    /**
+     * 预算金额
+     */
+    val amount: Double,
+    
+    /**
+     * 预算生效开始日期
+     */
+    val startDate: Date,
+    
+    /**
+     * 预算生效结束日期
+     */
+    val endDate: Date,
+    
+    /**
+     * 是否启用此预算
+     */
+    val isEnabled: Boolean = true,
+    
+    /**
+     * 提醒阈值（百分比，如 0.8 表示达到 80% 时提醒）
+     */
+    val alertThreshold: Double = 0.8,
+    
+    /**
+     * 创建时间
+     */
+    val createdAt: Date = Date(),
+    
+    /**
+     * 更新时间
+     */
+    val updatedAt: Date = Date()
+)
+
+/**
+ * 预算类型枚举
+ */
+enum class BudgetType {
+    TOTAL,      // 总预算
+    CATEGORY,   // 分类预算
+    MEMBER      // 成员预算
+}
+
+/**
+ * 预算状态数据类，用于展示预算使用情况
+ */
+data class BudgetStatus(
+    val budget: Budget,
+    val spent: Double,          // 已花费金额
+    val remaining: Double,      // 剩余金额
+    val percentage: Double,     // 使用百分比
+    val isOverBudget: Boolean,  // 是否超预算
+    val isNearLimit: Boolean    // 是否接近预算限制
+)

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

@@ -10,5 +10,6 @@ data class Settings(
     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
+    val lastBackupTime: Long = 0L, // 上次备份时间
+    val encryptBackup: Boolean = true // 备份加密开关，默认开启
 )

app/src/main/java/com/yovinchen/bookkeeping/ui/components/DetailedAnalysisReport.kt

@@ -0,0 +1,302 @@
+package com.yovinchen.bookkeeping.ui.components
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.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.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.yovinchen.bookkeeping.model.BookkeepingRecord
+import com.yovinchen.bookkeeping.model.TransactionType
+import java.text.NumberFormat
+import java.time.YearMonth
+import java.time.format.DateTimeFormatter
+import java.util.*
+
+/**
+ * 详细分析报表组件
+ * 显示按分类统计的详细信息
+ */
+@Composable
+fun DetailedAnalysisReport(
+    records: List<BookkeepingRecord>,
+    startMonth: YearMonth,
+    endMonth: YearMonth,
+    modifier: Modifier = Modifier
+) {
+    val currencyFormatter = NumberFormat.getCurrencyInstance(Locale.CHINA)
+    
+    // 按类型分组
+    val incomeRecords = records.filter { it.type == TransactionType.INCOME }
+    val expenseRecords = records.filter { it.type == TransactionType.EXPENSE }
+    
+    // 按分类统计
+    val incomeByCategory = incomeRecords.groupBy { it.category }
+        .mapValues { it.value.sumOf { record -> record.amount } }
+        .toList()
+        .sortedByDescending { it.second }
+    
+    val expenseByCategory = expenseRecords.groupBy { it.category }
+        .mapValues { it.value.sumOf { record -> record.amount } }
+        .toList()
+        .sortedByDescending { it.second }
+    
+    // 总收入和总支出
+    val totalIncome = incomeRecords.sumOf { it.amount }
+    val totalExpense = expenseRecords.sumOf { it.amount }
+    
+    Column(
+        modifier = modifier,
+        verticalArrangement = Arrangement.spacedBy(16.dp)
+    ) {
+        // 时间范围标题
+        Card(
+            modifier = Modifier.fillMaxWidth(),
+            elevation = CardDefaults.cardElevation(defaultElevation = 2.dp)
+        ) {
+            Text(
+                text = if (startMonth == endMonth) {
+                    "统计期间：${startMonth.format(DateTimeFormatter.ofPattern("yyyy年MM月"))}"
+                } else {
+                    "统计期间：${startMonth.format(DateTimeFormatter.ofPattern("yyyy年MM月"))} 至 ${endMonth.format(DateTimeFormatter.ofPattern("yyyy年MM月"))}"
+                },
+                style = MaterialTheme.typography.titleMedium,
+                fontWeight = FontWeight.Bold,
+                modifier = Modifier.padding(16.dp),
+                textAlign = TextAlign.Center
+            )
+        }
+        
+        // 支出分类详情
+        if (expenseByCategory.isNotEmpty()) {
+            CategoryDetailCard(
+                title = "支出分类明细",
+                categoryData = expenseByCategory,
+                total = totalExpense,
+                color = MaterialTheme.colorScheme.error,
+                currencyFormatter = currencyFormatter
+            )
+        }
+        
+        // 收入分类详情
+        if (incomeByCategory.isNotEmpty()) {
+            CategoryDetailCard(
+                title = "收入分类明细",
+                categoryData = incomeByCategory,
+                total = totalIncome,
+                color = MaterialTheme.colorScheme.primary,
+                currencyFormatter = currencyFormatter
+            )
+        }
+        
+        // 分类占比前5名
+        if (expenseByCategory.isNotEmpty()) {
+            TopCategoriesCard(
+                title = "支出TOP5",
+                categoryData = expenseByCategory.take(5),
+                total = totalExpense,
+                color = MaterialTheme.colorScheme.error,
+                currencyFormatter = currencyFormatter
+            )
+        }
+    }
+}
+
+/**
+ * 分类详情卡片
+ */
+@Composable
+private fun CategoryDetailCard(
+    title: String,
+    categoryData: List<Pair<String, Double>>,
+    total: Double,
+    color: Color,
+    currencyFormatter: NumberFormat
+) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        elevation = CardDefaults.cardElevation(defaultElevation = 4.dp)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+        ) {
+            Text(
+                text = title,
+                style = MaterialTheme.typography.titleLarge,
+                fontWeight = FontWeight.Bold,
+                color = color,
+                modifier = Modifier.padding(bottom = 16.dp)
+            )
+            
+            // 总计
+            Row(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(bottom = 12.dp),
+                horizontalArrangement = Arrangement.SpaceBetween
+            ) {
+                Text(
+                    text = "总计",
+                    style = MaterialTheme.typography.bodyLarge,
+                    fontWeight = FontWeight.Bold
+                )
+                Text(
+                    text = currencyFormatter.format(total),
+                    style = MaterialTheme.typography.bodyLarge,
+                    fontWeight = FontWeight.Bold,
+                    color = color
+                )
+            }
+            
+            HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
+            
+            // 分类列表
+            categoryData.forEach { (category, amount) ->
+                val percentage = if (total > 0) (amount / total * 100) else 0.0
+                
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(vertical = 8.dp),
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(
+                            text = category,
+                            style = MaterialTheme.typography.bodyMedium
+                        )
+                        Text(
+                            text = "${String.format("%.1f", percentage)}%",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
+                    
+                    Text(
+                        text = currencyFormatter.format(amount),
+                        style = MaterialTheme.typography.bodyMedium,
+                        fontWeight = FontWeight.Medium
+                    )
+                }
+                
+                // 进度条
+                LinearProgressIndicator(
+                    progress = (percentage / 100).toFloat(),
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(4.dp)
+                        .clip(RoundedCornerShape(2.dp)),
+                    color = color.copy(alpha = 0.8f),
+                    trackColor = color.copy(alpha = 0.2f)
+                )
+            }
+        }
+    }
+}
+
+/**
+ * TOP分类卡片
+ */
+@Composable
+private fun TopCategoriesCard(
+    title: String,
+    categoryData: List<Pair<String, Double>>,
+    total: Double,
+    color: Color,
+    currencyFormatter: NumberFormat
+) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        elevation = CardDefaults.cardElevation(defaultElevation = 4.dp),
+        colors = CardDefaults.cardColors(
+            containerColor = MaterialTheme.colorScheme.secondaryContainer
+        )
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+        ) {
+            Text(
+                text = title,
+                style = MaterialTheme.typography.titleMedium,
+                fontWeight = FontWeight.Bold,
+                modifier = Modifier.padding(bottom = 12.dp)
+            )
+            
+            categoryData.forEachIndexed { index, (category, amount) ->
+                val percentage = if (total > 0) (amount / total * 100) else 0.0
+                
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(vertical = 4.dp),
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Row(
+                        modifier = Modifier.weight(1f),
+                        horizontalArrangement = Arrangement.spacedBy(8.dp),
+                        verticalAlignment = Alignment.CenterVertically
+                    ) {
+                        // 排名
+                        Box(
+                            modifier = Modifier
+                                .size(24.dp)
+                                .clip(RoundedCornerShape(12.dp))
+                                .background(
+                                    when (index) {
+                                        0 -> Color(0xFFFFD700) // 金色
+                                        1 -> Color(0xFFC0C0C0) // 银色
+                                        2 -> Color(0xFFCD7F32) // 铜色
+                                        else -> MaterialTheme.colorScheme.surfaceVariant
+                                    }
+                                ),
+                            contentAlignment = Alignment.Center
+                        ) {
+                            Text(
+                                text = "${index + 1}",
+                                style = MaterialTheme.typography.labelSmall,
+                                fontWeight = FontWeight.Bold,
+                                color = if (index < 3) Color.White else MaterialTheme.colorScheme.onSurfaceVariant
+                            )
+                        }
+                        
+                        Text(
+                            text = category,
+                            style = MaterialTheme.typography.bodyMedium,
+                            fontWeight = if (index == 0) FontWeight.Bold else FontWeight.Normal
+                        )
+                    }
+                    
+                    Column(
+                        horizontalAlignment = Alignment.End
+                    ) {
+                        Text(
+                            text = currencyFormatter.format(amount),
+                            style = MaterialTheme.typography.bodyMedium,
+                            fontWeight = FontWeight.Medium
+                        )
+                        Text(
+                            text = "${String.format("%.1f", percentage)}%",
+                            style = MaterialTheme.typography.labelSmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/yovinchen/bookkeeping/ui/components/MonthlyYearlyReport.kt

@@ -0,0 +1,258 @@
+package com.yovinchen.bookkeeping.ui.components
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+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.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.yovinchen.bookkeeping.model.BookkeepingRecord
+import com.yovinchen.bookkeeping.model.TransactionType
+import java.text.NumberFormat
+import java.time.LocalDateTime
+import java.time.YearMonth
+import java.time.format.DateTimeFormatter
+import java.util.*
+
+/**
+ * 月度/年度报表组件
+ * 显示收支对比、盈余情况等统计信息
+ */
+@Composable
+fun MonthlyYearlyReport(
+    records: List<BookkeepingRecord>,
+    period: String, // "月度" 或 "年度"
+    startMonth: YearMonth,
+    endMonth: YearMonth,
+    modifier: Modifier = Modifier
+) {
+    val totalIncome = records
+        .filter { it.type == TransactionType.INCOME }
+        .sumOf { it.amount }
+    
+    val totalExpense = records
+        .filter { it.type == TransactionType.EXPENSE }
+        .sumOf { it.amount }
+    
+    val balance = totalIncome - totalExpense
+    val savingsRate = if (totalIncome > 0) {
+        ((totalIncome - totalExpense) / totalIncome * 100).coerceAtLeast(0.0)
+    } else 0.0
+    
+    Card(
+        modifier = modifier.fillMaxWidth(),
+        elevation = CardDefaults.cardElevation(defaultElevation = 4.dp)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            // 标题
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(
+                    text = "$period 报表",
+                    style = MaterialTheme.typography.titleLarge,
+                    fontWeight = FontWeight.Bold
+                )
+                
+                Text(
+                    text = if (startMonth == endMonth) {
+                        startMonth.format(DateTimeFormatter.ofPattern("yyyy年MM月"))
+                    } else {
+                        "${startMonth.format(DateTimeFormatter.ofPattern("yyyy年MM月"))} - ${endMonth.format(DateTimeFormatter.ofPattern("yyyy年MM月"))}"
+                    },
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+            
+            HorizontalDivider()
+            
+            // 收支对比
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceEvenly
+            ) {
+                // 收入
+                Column(
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                    modifier = Modifier.weight(1f)
+                ) {
+                    Text(
+                        text = "总收入",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                    Text(
+                        text = formatCurrency(totalIncome),
+                        style = MaterialTheme.typography.titleMedium,
+                        fontWeight = FontWeight.Bold,
+                        color = MaterialTheme.colorScheme.primary
+                    )
+                }
+                
+                // 分隔线
+                Box(
+                    modifier = Modifier
+                        .width(1.dp)
+                        .height(40.dp)
+                        .background(MaterialTheme.colorScheme.outlineVariant)
+                )
+                
+                // 支出
+                Column(
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                    modifier = Modifier.weight(1f)
+                ) {
+                    Text(
+                        text = "总支出",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                    Text(
+                        text = formatCurrency(totalExpense),
+                        style = MaterialTheme.typography.titleMedium,
+                        fontWeight = FontWeight.Bold,
+                        color = MaterialTheme.colorScheme.error
+                    )
+                }
+            }
+            
+            // 盈余情况
+            Card(
+                modifier = Modifier.fillMaxWidth(),
+                colors = CardDefaults.cardColors(
+                    containerColor = if (balance >= 0) {
+                        MaterialTheme.colorScheme.primaryContainer
+                    } else {
+                        MaterialTheme.colorScheme.errorContainer
+                    }
+                )
+            ) {
+                Column(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(12.dp),
+                    horizontalAlignment = Alignment.CenterHorizontally
+                ) {
+                    Text(
+                        text = if (balance >= 0) "盈余" else "亏损",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = if (balance >= 0) {
+                            MaterialTheme.colorScheme.onPrimaryContainer
+                        } else {
+                            MaterialTheme.colorScheme.onErrorContainer
+                        }
+                    )
+                    Text(
+                        text = formatCurrency(kotlin.math.abs(balance)),
+                        style = MaterialTheme.typography.headlineSmall,
+                        fontWeight = FontWeight.Bold,
+                        color = if (balance >= 0) {
+                            MaterialTheme.colorScheme.onPrimaryContainer
+                        } else {
+                            MaterialTheme.colorScheme.onErrorContainer
+                        }
+                    )
+                }
+            }
+            
+            // 储蓄率
+            if (totalIncome > 0) {
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Text(
+                        text = "储蓄率",
+                        style = MaterialTheme.typography.bodyMedium,
+                        modifier = Modifier.weight(1f)
+                    )
+                    
+                    Box(
+                        modifier = Modifier.weight(2f)
+                    ) {
+                        LinearProgressIndicator(
+                            progress = (savingsRate / 100).toFloat().coerceIn(0f, 1f),
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .height(8.dp)
+                                .clip(RoundedCornerShape(4.dp)),
+                            color = when {
+                                savingsRate >= 30 -> MaterialTheme.colorScheme.primary
+                                savingsRate >= 10 -> MaterialTheme.colorScheme.tertiary
+                                else -> MaterialTheme.colorScheme.error
+                            }
+                        )
+                    }
+                    
+                    Text(
+                        text = "${String.format("%.1f", savingsRate)}%",
+                        style = MaterialTheme.typography.bodyMedium,
+                        fontWeight = FontWeight.Bold,
+                        modifier = Modifier.padding(start = 8.dp),
+                        color = when {
+                            savingsRate >= 30 -> MaterialTheme.colorScheme.primary
+                            savingsRate >= 10 -> MaterialTheme.colorScheme.tertiary
+                            else -> MaterialTheme.colorScheme.error
+                        }
+                    )
+                }
+            }
+            
+            // 日均消费
+            val dayCount = if (period == "月度") {
+                // 计算月度天数
+                java.time.temporal.ChronoUnit.DAYS.between(
+                    startMonth.atDay(1),
+                    endMonth.atEndOfMonth()
+                ) + 1
+            } else {
+                // 计算年度天数
+                java.time.temporal.ChronoUnit.DAYS.between(
+                    startMonth.atDay(1),
+                    endMonth.atEndOfMonth()
+                ) + 1
+            }
+            
+            val dailyAverage = if (dayCount > 0) totalExpense / dayCount else 0.0
+            
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween
+            ) {
+                Text(
+                    text = "日均消费",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+                Text(
+                    text = formatCurrency(dailyAverage),
+                    style = MaterialTheme.typography.bodyMedium,
+                    fontWeight = FontWeight.Bold
+                )
+            }
+        }
+    }
+}
+
+/**
+ * 格式化货币
+ */
+private fun formatCurrency(amount: Double): String {
+    val format = NumberFormat.getCurrencyInstance(Locale.CHINA)
+    return format.format(amount)
+}

app/src/main/java/com/yovinchen/bookkeeping/ui/dialog/BudgetEditDialog.kt

@@ -0,0 +1,223 @@
+package com.yovinchen.bookkeeping.ui.dialog
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import com.yovinchen.bookkeeping.model.*
+import java.util.*
+
+/**
+ * 预算编辑对话框
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun BudgetEditDialog(
+    budget: Budget? = null,
+    categories: List<Category>,
+    members: List<Member>,
+    onDismiss: () -> Unit,
+    onConfirm: (Budget) -> Unit
+) {
+    var selectedType by remember { mutableStateOf(budget?.type ?: BudgetType.TOTAL) }
+    var amount by remember { mutableStateOf(budget?.amount?.toString() ?: "") }
+    var selectedCategory by remember { mutableStateOf(budget?.categoryName) }
+    var selectedMemberId by remember { mutableStateOf(budget?.memberId) }
+    var alertThreshold by remember { mutableStateOf((budget?.alertThreshold ?: 0.8) * 100) }
+    
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = {
+            Text(if (budget == null) "添加预算" else "编辑预算")
+        },
+        text = {
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .verticalScroll(rememberScrollState()),
+                verticalArrangement = Arrangement.spacedBy(16.dp)
+            ) {
+                // 预算类型选择
+                Text(
+                    text = "预算类型",
+                    style = MaterialTheme.typography.labelMedium
+                )
+                Row(
+                    horizontalArrangement = Arrangement.spacedBy(8.dp)
+                ) {
+                    FilterChip(
+                        selected = selectedType == BudgetType.TOTAL,
+                        onClick = { selectedType = BudgetType.TOTAL },
+                        label = { Text("总预算") }
+                    )
+                    FilterChip(
+                        selected = selectedType == BudgetType.CATEGORY,
+                        onClick = { selectedType = BudgetType.CATEGORY },
+                        label = { Text("分类预算") }
+                    )
+                    FilterChip(
+                        selected = selectedType == BudgetType.MEMBER,
+                        onClick = { selectedType = BudgetType.MEMBER },
+                        label = { Text("成员预算") }
+                    )
+                }
+                
+                // 金额输入
+                OutlinedTextField(
+                    value = amount,
+                    onValueChange = { amount = it.filter { char -> char.isDigit() || char == '.' } },
+                    label = { Text("预算金额") },
+                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                    modifier = Modifier.fillMaxWidth(),
+                    singleLine = true
+                )
+                
+                // 分类选择（仅在分类预算时显示）
+                if (selectedType == BudgetType.CATEGORY) {
+                    var expanded by remember { mutableStateOf(false) }
+                    
+                    ExposedDropdownMenuBox(
+                        expanded = expanded,
+                        onExpandedChange = { expanded = !expanded }
+                    ) {
+                        OutlinedTextField(
+                            value = selectedCategory ?: "",
+                            onValueChange = {},
+                            label = { Text("选择分类") },
+                            readOnly = true,
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .menuAnchor(),
+                            trailingIcon = {
+                                ExposedDropdownMenuDefaults.TrailingIcon(expanded = expanded)
+                            }
+                        )
+                        
+                        ExposedDropdownMenu(
+                            expanded = expanded,
+                            onDismissRequest = { expanded = false }
+                        ) {
+                            categories.forEach { category ->
+                                DropdownMenuItem(
+                                    text = { Text(category.name) },
+                                    onClick = {
+                                        selectedCategory = category.name
+                                        expanded = false
+                                    }
+                                )
+                            }
+                        }
+                    }
+                }
+                
+                // 成员选择（仅在成员预算时显示）
+                if (selectedType == BudgetType.MEMBER) {
+                    var expanded by remember { mutableStateOf(false) }
+                    val selectedMember = members.find { it.id == selectedMemberId }
+                    
+                    ExposedDropdownMenuBox(
+                        expanded = expanded,
+                        onExpandedChange = { expanded = !expanded }
+                    ) {
+                        OutlinedTextField(
+                            value = selectedMember?.name ?: "",
+                            onValueChange = {},
+                            label = { Text("选择成员") },
+                            readOnly = true,
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .menuAnchor(),
+                            trailingIcon = {
+                                ExposedDropdownMenuDefaults.TrailingIcon(expanded = expanded)
+                            }
+                        )
+                        
+                        ExposedDropdownMenu(
+                            expanded = expanded,
+                            onDismissRequest = { expanded = false }
+                        ) {
+                            members.forEach { member ->
+                                DropdownMenuItem(
+                                    text = { Text(member.name) },
+                                    onClick = {
+                                        selectedMemberId = member.id
+                                        expanded = false
+                                    }
+                                )
+                            }
+                        }
+                    }
+                }
+                
+                // 预警阈值
+                Column {
+                    Text(
+                        text = "预警阈值: ${alertThreshold.toInt()}%",
+                        style = MaterialTheme.typography.labelMedium
+                    )
+                    Slider(
+                        value = alertThreshold.toFloat(),
+                        onValueChange = { alertThreshold = it.toDouble() },
+                        valueRange = 50f..95f,
+                        steps = 8,
+                        modifier = Modifier.fillMaxWidth()
+                    )
+                    Text(
+                        text = "当使用金额达到预算的 ${alertThreshold.toInt()}% 时提醒",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            }
+        },
+        confirmButton = {
+            TextButton(
+                onClick = {
+                    val amountValue = amount.toDoubleOrNull()
+                    if (amountValue != null && amountValue > 0) {
+                        val calendar = Calendar.getInstance()
+                        val startDate = budget?.startDate ?: calendar.time
+                        
+                        // 设置结束日期为当月最后一天
+                        calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH))
+                        calendar.set(Calendar.HOUR_OF_DAY, 23)
+                        calendar.set(Calendar.MINUTE, 59)
+                        calendar.set(Calendar.SECOND, 59)
+                        val endDate = calendar.time
+                        
+                        val newBudget = Budget(
+                            id = budget?.id ?: 0,
+                            type = selectedType,
+                            amount = amountValue,
+                            categoryName = if (selectedType == BudgetType.CATEGORY) selectedCategory else null,
+                            memberId = if (selectedType == BudgetType.MEMBER) selectedMemberId else null,
+                            startDate = startDate,
+                            endDate = endDate,
+                            alertThreshold = alertThreshold / 100,
+                            isEnabled = budget?.isEnabled ?: true,
+                            createdAt = budget?.createdAt ?: Date(),
+                            updatedAt = Date()
+                        )
+                        onConfirm(newBudget)
+                    }
+                },
+                enabled = amount.toDoubleOrNull() != null && amount.toDouble() > 0 &&
+                        (selectedType != BudgetType.CATEGORY || selectedCategory != null) &&
+                        (selectedType != BudgetType.MEMBER || selectedMemberId != null)
+            ) {
+                Text("确定")
+            }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) {
+                Text("取消")
+            }
+        }
+    )
+}

app/src/main/java/com/yovinchen/bookkeeping/ui/navigation/MainNavigation.kt

@@ -47,6 +47,10 @@ sealed class Screen(
         "设置",
         iconResId = R.drawable.setting
     )
+    object Budget : Screen(
+        "budget",
+        "预算管理"
+    )
     object CategoryDetail : Screen(
         "category_detail/{category}/{startMonth}/{endMonth}",
         "分类详情"
@@ -148,9 +152,16 @@ fun MainNavigation(
             composable(Screen.Settings.route) {
                 SettingsScreen(
                     currentTheme = currentTheme,
-                    onThemeChange = onThemeChange
+                    onThemeChange = onThemeChange,
+                    onNavigateToBudget = {
+                        navController.navigate(Screen.Budget.route)
+                    }
                 )
             }
+            
+            composable(Screen.Budget.route) {
+                BudgetScreen()
+            }
 
             composable(
                 route = Screen.CategoryDetail.route,

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

@@ -38,12 +38,14 @@ import com.yovinchen.bookkeeping.model.MemberStat
 import com.yovinchen.bookkeeping.ui.components.CategoryPieChart
 import com.yovinchen.bookkeeping.ui.components.CategoryStatItem
 import com.yovinchen.bookkeeping.ui.components.DateRangePicker
+import com.yovinchen.bookkeeping.ui.components.DetailedAnalysisReport
+import com.yovinchen.bookkeeping.ui.components.MonthlyYearlyReport
 import com.yovinchen.bookkeeping.ui.components.TrendLineChart
 import com.yovinchen.bookkeeping.viewmodel.AnalysisViewModel
 import java.time.YearMonth
 
 enum class ViewMode {
-    CATEGORY, MEMBER
+    CATEGORY, MEMBER, REPORT
 }
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -93,7 +95,13 @@ fun AnalysisScreen(
                     Button(
                         onClick = { showViewModeMenu = true }
                     ) {
-                        Text(if (currentViewMode == ViewMode.CATEGORY) "分类" else "成员")
+                        Text(
+                            when {
+                                currentViewMode == ViewMode.CATEGORY -> "分类"
+                                currentViewMode == ViewMode.MEMBER -> "成员"
+                                else -> "报表"
+                            }
+                        )
                         Icon(Icons.Default.ArrowDropDown, "切换视图")
                     }
                     DropdownMenu(
@@ -114,6 +122,13 @@ fun AnalysisScreen(
                                 showViewModeMenu = false
                             }
                         )
+                        DropdownMenuItem(
+                            text = { Text("报表") },
+                            onClick = {
+                                currentViewMode = ViewMode.REPORT
+                                showViewModeMenu = false
+                            }
+                        )
                     }
                 }
 
@@ -159,41 +174,68 @@ fun AnalysisScreen(
                         }
                     }
                     else -> {
-                        // 饼图视图
+                        if (currentViewMode == ViewMode.REPORT) {
-                        item {
+                            // 报表视图
-                            CategoryPieChart(
+                            item {
-                                categoryData = categoryStats.map { Pair(it.category, it.percentage.toFloat()) },
+                                MonthlyYearlyReport(
-                                memberData = memberStats.map { Pair(it.member, it.percentage.toFloat()) },
+                                    records = records,
-                                currentViewMode = currentViewMode == ViewMode.MEMBER,
+                                    period = if (startMonth == endMonth) "月度" else "年度",
-                                modifier = Modifier
+                                    startMonth = startMonth,
-                                    .fillMaxWidth()
+                                    endMonth = endMonth,
-                                    .height(200.dp)
+                                    modifier = Modifier
-                                    .padding(bottom = 16.dp),
+                                        .fillMaxWidth()
-                                onCategoryClick = { category ->
+                                        .padding(vertical = 8.dp)
-                                    if (currentViewMode == ViewMode.CATEGORY) {
+                                )
-                                        onNavigateToCategoryDetail(category, startMonth, endMonth)
+                            }
-                                    } else {
+                            
-                                        onNavigateToMemberDetail(category, startMonth, endMonth, selectedAnalysisType)
+                            // 详细分析报表
+                            item {
+                                DetailedAnalysisReport(
+                                    records = records,
+                                    startMonth = startMonth,
+                                    endMonth = endMonth,
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .padding(top = 16.dp)
+                                )
+                            }
+                        } else {
+                            // 饼图视图
+                            item {
+                                CategoryPieChart(
+                                    categoryData = categoryStats.map { Pair(it.category, it.percentage.toFloat()) },
+                                    memberData = memberStats.map { Pair(it.member, it.percentage.toFloat()) },
+                                    currentViewMode = currentViewMode == ViewMode.MEMBER,
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .height(200.dp)
+                                        .padding(bottom = 16.dp),
+                                    onCategoryClick = { category ->
+                                        if (currentViewMode == ViewMode.CATEGORY) {
+                                            onNavigateToCategoryDetail(category, startMonth, endMonth)
+                                        } else {
+                                            onNavigateToMemberDetail(category, startMonth, endMonth, selectedAnalysisType)
+                                        }
                                     }
-                                }
+                                )
-                            )
+                            }
-                        }
 
-                        // 统计列表
+                            // 统计列表
-                        items(if (currentViewMode == ViewMode.CATEGORY) categoryStats else memberStats) { stat ->
+                            items(if (currentViewMode == ViewMode.CATEGORY) categoryStats else memberStats) { stat ->
-                            val category = if (stat is CategoryStat) stat.category else null
+                                val category = if (stat is CategoryStat) stat.category else null
-                            val member = if (stat is MemberStat) stat.member else null
+                                val member = if (stat is MemberStat) stat.member else null
 
-                            CategoryStatItem(
+                                CategoryStatItem(
-                                stat = stat,
+                                    stat = stat,
-                                onClick = {
+                                    onClick = {
-                                    if (currentViewMode == ViewMode.CATEGORY && category != null) {
+                                        if (currentViewMode == ViewMode.CATEGORY && category != null) {
-                                        onNavigateToCategoryDetail(category, startMonth, endMonth)
+                                            onNavigateToCategoryDetail(category, startMonth, endMonth)
-                                    } else if (currentViewMode == ViewMode.MEMBER && member != null) {
+                                        } else if (currentViewMode == ViewMode.MEMBER && member != null) {
-                                        onNavigateToMemberDetail(member, startMonth, endMonth, selectedAnalysisType)
+                                            onNavigateToMemberDetail(member, startMonth, endMonth, selectedAnalysisType)
+                                        }
                                     }
-                                }
+                                )
-                            )
+                            }
                         }
                     }
                 }

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

@@ -0,0 +1,411 @@
+package com.yovinchen.bookkeeping.ui.screen
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.yovinchen.bookkeeping.model.*
+import com.yovinchen.bookkeeping.ui.dialog.BudgetEditDialog
+import com.yovinchen.bookkeeping.viewmodel.BudgetViewModel
+import com.yovinchen.bookkeeping.viewmodel.HomeViewModel
+import com.yovinchen.bookkeeping.viewmodel.MemberViewModel
+import java.text.NumberFormat
+import java.util.Locale
+
+/**
+ * 预算管理界面
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun BudgetScreen(
+    viewModel: BudgetViewModel = viewModel(),
+    homeViewModel: HomeViewModel = viewModel(),
+    memberViewModel: MemberViewModel = viewModel()
+) {
+    val budgetStatuses by viewModel.activeBudgetStatuses.collectAsState()
+    val totalBudgetStatus by viewModel.totalBudgetStatus.collectAsState()
+    val categoryBudgetStatuses by viewModel.categoryBudgetStatuses.collectAsState()
+    val memberBudgetStatuses by viewModel.memberBudgetStatuses.collectAsState()
+    val showBudgetDialog by viewModel.showBudgetDialog.collectAsState()
+    val editingBudget by viewModel.editingBudget.collectAsState()
+    
+    val categories by homeViewModel.categories.collectAsState()
+    val members by memberViewModel.allMembers.collectAsState(initial = emptyList())
+    
+    var selectedTab by remember { mutableStateOf(0) }
+    val tabs = listOf("总览", "分类预算", "成员预算")
+    
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp)
+    ) {
+        // 页面标题
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = "预算管理",
+                style = MaterialTheme.typography.headlineMedium,
+                fontWeight = FontWeight.Bold
+            )
+            
+            // 添加预算按钮
+            IconButton(
+                onClick = { viewModel.showEditBudgetDialog() }
+            ) {
+                Icon(
+                    imageVector = Icons.Default.Add,
+                    contentDescription = "添加预算",
+                    tint = MaterialTheme.colorScheme.primary
+                )
+            }
+        }
+        
+        Spacer(modifier = Modifier.height(16.dp))
+        
+        // 总预算概览卡片
+        totalBudgetStatus?.let { status ->
+            BudgetOverviewCard(status)
+            Spacer(modifier = Modifier.height(16.dp))
+        }
+        
+        // Tab 选择器
+        TabRow(selectedTabIndex = selectedTab) {
+            tabs.forEachIndexed { index, title ->
+                Tab(
+                    selected = selectedTab == index,
+                    onClick = { selectedTab = index },
+                    text = { Text(title) }
+                )
+            }
+        }
+        
+        Spacer(modifier = Modifier.height(16.dp))
+        
+        // Tab 内容
+        when (selectedTab) {
+            0 -> BudgetOverviewTab(budgetStatuses, viewModel)
+            1 -> CategoryBudgetTab(categoryBudgetStatuses, viewModel)
+            2 -> MemberBudgetTab(memberBudgetStatuses, viewModel)
+        }
+    }
+    
+    // 预算编辑对话框
+    if (showBudgetDialog) {
+        BudgetEditDialog(
+            budget = editingBudget,
+            categories = categories.filter { it.type == TransactionType.EXPENSE },
+            members = members,
+            onDismiss = { viewModel.hideBudgetDialog() },
+            onConfirm = { budget ->
+                if (editingBudget == null) {
+                    viewModel.createBudget(
+                        type = budget.type,
+                        amount = budget.amount,
+                        categoryName = budget.categoryName,
+                        memberId = budget.memberId,
+                        alertThreshold = budget.alertThreshold
+                    )
+                } else {
+                    viewModel.updateBudget(budget)
+                }
+                viewModel.hideBudgetDialog()
+            }
+        )
+    }
+}
+
+/**
+ * 预算概览卡片
+ */
+@Composable
+private fun BudgetOverviewCard(budgetStatus: BudgetStatus) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        elevation = CardDefaults.cardElevation(defaultElevation = 4.dp)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+        ) {
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(
+                    text = "本月总预算",
+                    style = MaterialTheme.typography.titleMedium,
+                    fontWeight = FontWeight.Bold
+                )
+                
+                Text(
+                    text = formatCurrency(budgetStatus.budget.amount),
+                    style = MaterialTheme.typography.titleLarge,
+                    fontWeight = FontWeight.Bold,
+                    color = MaterialTheme.colorScheme.primary
+                )
+            }
+            
+            Spacer(modifier = Modifier.height(12.dp))
+            
+            // 进度条
+            LinearProgressIndicator(
+                progress = budgetStatus.percentage.toFloat().coerceIn(0f, 1f),
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .height(8.dp)
+                    .clip(RoundedCornerShape(4.dp)),
+                color = when {
+                    budgetStatus.isOverBudget -> MaterialTheme.colorScheme.error
+                    budgetStatus.isNearLimit -> MaterialTheme.colorScheme.tertiary
+                    else -> MaterialTheme.colorScheme.primary
+                }
+            )
+            
+            Spacer(modifier = Modifier.height(8.dp))
+            
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween
+            ) {
+                Column {
+                    Text(
+                        text = "已使用",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                    Text(
+                        text = formatCurrency(budgetStatus.spent),
+                        style = MaterialTheme.typography.bodyLarge,
+                        fontWeight = FontWeight.Medium
+                    )
+                }
+                
+                Column(horizontalAlignment = Alignment.End) {
+                    Text(
+                        text = "剩余",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                    Text(
+                        text = formatCurrency(budgetStatus.remaining),
+                        style = MaterialTheme.typography.bodyLarge,
+                        fontWeight = FontWeight.Medium,
+                        color = when {
+                            budgetStatus.isOverBudget -> MaterialTheme.colorScheme.error
+                            budgetStatus.isNearLimit -> MaterialTheme.colorScheme.tertiary
+                            else -> MaterialTheme.colorScheme.primary
+                        }
+                    )
+                }
+            }
+            
+            if (budgetStatus.isOverBudget) {
+                Spacer(modifier = Modifier.height(8.dp))
+                Text(
+                    text = "⚠️ 已超出预算 ${formatCurrency(kotlin.math.abs(budgetStatus.remaining))}",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.error,
+                    modifier = Modifier.fillMaxWidth(),
+                    textAlign = TextAlign.Center
+                )
+            } else if (budgetStatus.isNearLimit) {
+                Spacer(modifier = Modifier.height(8.dp))
+                Text(
+                    text = "⚠️ 接近预算限制",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.tertiary,
+                    modifier = Modifier.fillMaxWidth(),
+                    textAlign = TextAlign.Center
+                )
+            }
+        }
+    }
+}
+
+/**
+ * 预算总览标签页
+ */
+@Composable
+private fun BudgetOverviewTab(
+    budgetStatuses: List<BudgetStatus>,
+    viewModel: BudgetViewModel
+) {
+    LazyColumn(
+        verticalArrangement = Arrangement.spacedBy(8.dp)
+    ) {
+        items(budgetStatuses) { status ->
+            BudgetItem(
+                budgetStatus = status,
+                onClick = { viewModel.showEditBudgetDialog(status.budget) },
+                onToggleEnabled = { viewModel.toggleBudgetEnabled(status.budget) }
+            )
+        }
+    }
+}
+
+/**
+ * 分类预算标签页
+ */
+@Composable
+private fun CategoryBudgetTab(
+    categoryBudgetStatuses: List<BudgetStatus>,
+    viewModel: BudgetViewModel
+) {
+    LazyColumn(
+        verticalArrangement = Arrangement.spacedBy(8.dp)
+    ) {
+        items(categoryBudgetStatuses) { status ->
+            BudgetItem(
+                budgetStatus = status,
+                onClick = { viewModel.showEditBudgetDialog(status.budget) },
+                onToggleEnabled = { viewModel.toggleBudgetEnabled(status.budget) }
+            )
+        }
+    }
+}
+
+/**
+ * 成员预算标签页
+ */
+@Composable
+private fun MemberBudgetTab(
+    memberBudgetStatuses: List<BudgetStatus>,
+    viewModel: BudgetViewModel
+) {
+    LazyColumn(
+        verticalArrangement = Arrangement.spacedBy(8.dp)
+    ) {
+        items(memberBudgetStatuses) { status ->
+            BudgetItem(
+                budgetStatus = status,
+                onClick = { viewModel.showEditBudgetDialog(status.budget) },
+                onToggleEnabled = { viewModel.toggleBudgetEnabled(status.budget) }
+            )
+        }
+    }
+}
+
+/**
+ * 预算项目组件
+ */
+@Composable
+private fun BudgetItem(
+    budgetStatus: BudgetStatus,
+    onClick: () -> Unit,
+    onToggleEnabled: () -> Unit
+) {
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { onClick() },
+        colors = CardDefaults.cardColors(
+            containerColor = if (budgetStatus.budget.isEnabled) {
+                MaterialTheme.colorScheme.surface
+            } else {
+                MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.5f)
+            }
+        )
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Column(
+                modifier = Modifier.weight(1f)
+            ) {
+                Text(
+                    text = when (budgetStatus.budget.type) {
+                        BudgetType.TOTAL -> "总预算"
+                        BudgetType.CATEGORY -> budgetStatus.budget.categoryName ?: "未知分类"
+                        BudgetType.MEMBER -> "成员预算"
+                    },
+                    style = MaterialTheme.typography.titleMedium,
+                    fontWeight = FontWeight.Medium
+                )
+                
+                Spacer(modifier = Modifier.height(4.dp))
+                
+                Row(
+                    horizontalArrangement = Arrangement.spacedBy(16.dp)
+                ) {
+                    Text(
+                        text = "预算: ${formatCurrency(budgetStatus.budget.amount)}",
+                        style = MaterialTheme.typography.bodyMedium
+                    )
+                    Text(
+                        text = "已用: ${formatCurrency(budgetStatus.spent)}",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = when {
+                            budgetStatus.isOverBudget -> MaterialTheme.colorScheme.error
+                            budgetStatus.isNearLimit -> MaterialTheme.colorScheme.tertiary
+                            else -> MaterialTheme.colorScheme.onSurfaceVariant
+                        }
+                    )
+                }
+                
+                Spacer(modifier = Modifier.height(8.dp))
+                
+                LinearProgressIndicator(
+                    progress = budgetStatus.percentage.toFloat().coerceIn(0f, 1f),
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(4.dp)
+                        .clip(RoundedCornerShape(2.dp)),
+                    color = when {
+                        budgetStatus.isOverBudget -> MaterialTheme.colorScheme.error
+                        budgetStatus.isNearLimit -> MaterialTheme.colorScheme.tertiary
+                        else -> MaterialTheme.colorScheme.primary
+                    }
+                )
+            }
+            
+            IconButton(onClick = onToggleEnabled) {
+                Icon(
+                    imageVector = if (budgetStatus.budget.isEnabled) {
+                        Icons.Default.CheckCircle
+                    } else {
+                        Icons.Default.Cancel
+                    },
+                    contentDescription = if (budgetStatus.budget.isEnabled) "禁用" else "启用",
+                    tint = if (budgetStatus.budget.isEnabled) {
+                        MaterialTheme.colorScheme.primary
+                    } else {
+                        MaterialTheme.colorScheme.onSurfaceVariant
+                    }
+                )
+            }
+        }
+    }
+}
+
+/**
+ * 格式化货币
+ */
+private fun formatCurrency(amount: Double): String {
+    val format = NumberFormat.getCurrencyInstance(Locale.CHINA)
+    return format.format(amount)
+}

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

@@ -19,6 +19,7 @@ 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.Settings
 import com.yovinchen.bookkeeping.model.ThemeMode
 import com.yovinchen.bookkeeping.ui.components.*
 import com.yovinchen.bookkeeping.ui.dialog.*
@@ -30,6 +31,7 @@ import com.yovinchen.bookkeeping.viewmodel.*
 fun SettingsScreen(
     currentTheme: ThemeMode,
     onThemeChange: (ThemeMode) -> Unit,
+    onNavigateToBudget: () -> Unit = {},
     viewModel: SettingsViewModel = viewModel(),
     memberViewModel: MemberViewModel = viewModel()
 ) {
@@ -43,6 +45,7 @@ fun SettingsScreen(
     val selectedType by viewModel.selectedCategoryType.collectAsState()
     val members by memberViewModel.allMembers.collectAsState(initial = emptyList())
     val monthStartDay by viewModel.monthStartDay.collectAsState()
+    val settings by viewModel.settings.collectAsState()
     val context = LocalContext.current
     
     var showMonthStartDayDialog by remember { mutableStateOf(false) }
@@ -73,6 +76,17 @@ fun SettingsScreen(
             modifier = Modifier.clickable { showBackupDialog = true }
         )
 
+        HorizontalDivider()
+        
+        // 预算管理设置项
+        ListItem(
+            headlineContent = { Text("预算管理") },
+            supportingContent = { Text("设置和管理预算") },
+            modifier = Modifier.clickable { 
+                onNavigateToBudget()
+            }
+        )
+
         HorizontalDivider()
 
         // 主题设置项
@@ -277,6 +291,29 @@ fun SettingsScreen(
                                 style = MaterialTheme.typography.bodySmall
                             )
                         }
+                        
+                        HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
+                        
+                        // 备份加密开关
+                        Row(
+                            modifier = Modifier.fillMaxWidth(),
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Text("备份加密", modifier = Modifier.weight(1f))
+                            Switch(
+                                checked = settings?.encryptBackup ?: true,
+                                onCheckedChange = { enabled ->
+                                    viewModel.updateSettings(
+                                        settings?.copy(encryptBackup = enabled) ?: Settings(encryptBackup = enabled)
+                                    )
+                                }
+                            )
+                        }
+                        Text(
+                            "开启后，导出的备份文件将被加密保护",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
                     }
                 },
                 confirmButton = {

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

@@ -0,0 +1,136 @@
+package com.yovinchen.bookkeeping.utils
+
+import android.security.keystore.KeyGenParameterSpec
+import android.security.keystore.KeyProperties
+import android.util.Base64
+import java.security.KeyStore
+import javax.crypto.Cipher
+import javax.crypto.KeyGenerator
+import javax.crypto.SecretKey
+import javax.crypto.spec.GCMParameterSpec
+
+/**
+ * 加密工具类，使用 Android Keystore 系统安全地存储加密密钥
+ */
+object EncryptionUtils {
+    private const val ANDROID_KEYSTORE = "AndroidKeyStore"
+    private const val TRANSFORMATION = "AES/GCM/NoPadding"
+    private const val KEY_ALIAS = "BookkeepingBackupKey"
+    private const val GCM_TAG_LENGTH = 128
+    
+    init {
+        generateKey()
+    }
+    
+    /**
+     * 生成或获取加密密钥
+     */
+    private fun generateKey() {
+        val keyStore = KeyStore.getInstance(ANDROID_KEYSTORE)
+        keyStore.load(null)
+        
+        // 如果密钥已存在，则不需要重新生成
+        if (keyStore.containsAlias(KEY_ALIAS)) {
+            return
+        }
+        
+        val keyGenerator = KeyGenerator.getInstance(KeyProperties.KEY_ALGORITHM_AES, ANDROID_KEYSTORE)
+        val keyGenParameterSpec = KeyGenParameterSpec.Builder(
+            KEY_ALIAS,
+            KeyProperties.PURPOSE_ENCRYPT or KeyProperties.PURPOSE_DECRYPT
+        )
+            .setBlockModes(KeyProperties.BLOCK_MODE_GCM)
+            .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE)
+            .setRandomizedEncryptionRequired(true)
+            .build()
+        
+        keyGenerator.init(keyGenParameterSpec)
+        keyGenerator.generateKey()
+    }
+    
+    /**
+     * 获取密钥
+     */
+    private fun getKey(): SecretKey {
+        val keyStore = KeyStore.getInstance(ANDROID_KEYSTORE)
+        keyStore.load(null)
+        return keyStore.getKey(KEY_ALIAS, null) as SecretKey
+    }
+    
+    /**
+     * 加密字符串
+     * @param plainText 要加密的明文
+     * @return Base64编码的加密数据（包含IV）
+     */
+    fun encrypt(plainText: String): String {
+        val cipher = Cipher.getInstance(TRANSFORMATION)
+        cipher.init(Cipher.ENCRYPT_MODE, getKey())
+        
+        val iv = cipher.iv
+        val encryptedBytes = cipher.doFinal(plainText.toByteArray(Charsets.UTF_8))
+        
+        // 将IV和加密数据组合
+        val combined = ByteArray(iv.size + encryptedBytes.size)
+        System.arraycopy(iv, 0, combined, 0, iv.size)
+        System.arraycopy(encryptedBytes, 0, combined, iv.size, encryptedBytes.size)
+        
+        return Base64.encodeToString(combined, Base64.DEFAULT)
+    }
+    
+    /**
+     * 解密字符串
+     * @param encryptedData Base64编码的加密数据
+     * @return 解密后的明文
+     */
+    fun decrypt(encryptedData: String): String {
+        val combined = Base64.decode(encryptedData, Base64.DEFAULT)
+        
+        // 提取IV（前12字节）
+        val iv = combined.sliceArray(0..11)
+        val encryptedBytes = combined.sliceArray(12 until combined.size)
+        
+        val cipher = Cipher.getInstance(TRANSFORMATION)
+        val spec = GCMParameterSpec(GCM_TAG_LENGTH, iv)
+        cipher.init(Cipher.DECRYPT_MODE, getKey(), spec)
+        
+        val decryptedBytes = cipher.doFinal(encryptedBytes)
+        return String(decryptedBytes, Charsets.UTF_8)
+    }
+    
+    /**
+     * 加密字节数组
+     * @param data 要加密的数据
+     * @return 加密后的数据（包含IV）
+     */
+    fun encryptBytes(data: ByteArray): ByteArray {
+        val cipher = Cipher.getInstance(TRANSFORMATION)
+        cipher.init(Cipher.ENCRYPT_MODE, getKey())
+        
+        val iv = cipher.iv
+        val encryptedBytes = cipher.doFinal(data)
+        
+        // 将IV和加密数据组合
+        val combined = ByteArray(iv.size + encryptedBytes.size)
+        System.arraycopy(iv, 0, combined, 0, iv.size)
+        System.arraycopy(encryptedBytes, 0, combined, iv.size, encryptedBytes.size)
+        
+        return combined
+    }
+    
+    /**
+     * 解密字节数组
+     * @param encryptedData 加密的数据
+     * @return 解密后的数据
+     */
+    fun decryptBytes(encryptedData: ByteArray): ByteArray {
+        // 提取IV（前12字节）
+        val iv = encryptedData.sliceArray(0..11)
+        val encryptedBytes = encryptedData.sliceArray(12 until encryptedData.size)
+        
+        val cipher = Cipher.getInstance(TRANSFORMATION)
+        val spec = GCMParameterSpec(GCM_TAG_LENGTH, iv)
+        cipher.init(Cipher.DECRYPT_MODE, getKey(), spec)
+        
+        return cipher.doFinal(encryptedBytes)
+    }
+}

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

@@ -107,11 +107,16 @@ object FilePickerUtil {
     private fun isValidFileType(fileName: String, mimeType: String?): Boolean {
         val fileExtension = fileName.lowercase()
         return fileExtension.endsWith(".csv") || 
+               fileExtension.endsWith(".csv.enc") ||
                fileExtension.endsWith(".xlsx") ||
+               fileExtension.endsWith(".xlsx.enc") ||
                fileExtension.endsWith(".xls") ||
+               fileExtension.endsWith(".xls.enc") ||
+               fileExtension.endsWith(".enc") ||
                mimeType == "text/csv" ||
                mimeType == "application/vnd.ms-excel" ||
-               mimeType == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
+               mimeType == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" ||
+               mimeType == "application/octet-stream" // 加密文件可能被识别为二进制流
     }
 
     /**

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

@@ -0,0 +1,185 @@
+package com.yovinchen.bookkeeping.viewmodel
+
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import com.yovinchen.bookkeeping.data.BookkeepingDatabase
+import com.yovinchen.bookkeeping.data.BudgetRepository
+import com.yovinchen.bookkeeping.model.*
+import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.launch
+import java.util.*
+import java.util.Calendar
+
+/**
+ * 预算管理 ViewModel
+ * 负责预算相关的业务逻辑和状态管理
+ */
+class BudgetViewModel(application: Application) : AndroidViewModel(application) {
+    private val database = BookkeepingDatabase.getDatabase(application)
+    private val budgetRepository = BudgetRepository(
+        database.budgetDao(),
+        database.bookkeepingDao(),
+        database.memberDao()
+    )
+    
+    // 所有预算列表
+    val allBudgets = budgetRepository.getAllBudgets()
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5000),
+            initialValue = emptyList()
+        )
+    
+    // 当前活跃的预算状态
+    val activeBudgetStatuses = budgetRepository.getActiveBudgetStatuses()
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5000),
+            initialValue = emptyList()
+        )
+    
+    // 总预算状态
+    private val _totalBudgetStatus = MutableStateFlow<BudgetStatus?>(null)
+    val totalBudgetStatus: StateFlow<BudgetStatus?> = _totalBudgetStatus.asStateFlow()
+    
+    // 分类预算状态
+    val categoryBudgetStatuses = budgetRepository.getCategoryBudgetStatuses()
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5000),
+            initialValue = emptyList()
+        )
+    
+    // 成员预算状态
+    val memberBudgetStatuses = budgetRepository.getMemberBudgetStatuses()
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5000),
+            initialValue = emptyList()
+        )
+    
+    // 编辑中的预算
+    private val _editingBudget = MutableStateFlow<Budget?>(null)
+    val editingBudget: StateFlow<Budget?> = _editingBudget.asStateFlow()
+    
+    // 对话框显示状态
+    private val _showBudgetDialog = MutableStateFlow(false)
+    val showBudgetDialog: StateFlow<Boolean> = _showBudgetDialog.asStateFlow()
+    
+    init {
+        // 初始化时加载总预算状态
+        loadTotalBudgetStatus()
+    }
+    
+    /**
+     * 加载总预算状态
+     */
+    private fun loadTotalBudgetStatus() {
+        viewModelScope.launch {
+            _totalBudgetStatus.value = budgetRepository.getTotalBudgetStatus()
+        }
+    }
+    
+    /**
+     * 创建新预算
+     */
+    fun createBudget(
+        type: BudgetType,
+        amount: Double,
+        categoryName: String? = null,
+        memberId: Int? = null,
+        alertThreshold: Double = 0.8
+    ) {
+        viewModelScope.launch {
+            val calendar = Calendar.getInstance()
+            val startDate = calendar.time
+            
+            // 设置结束日期为当月最后一天
+            calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH))
+            calendar.set(Calendar.HOUR_OF_DAY, 23)
+            calendar.set(Calendar.MINUTE, 59)
+            calendar.set(Calendar.SECOND, 59)
+            val endDate = calendar.time
+            
+            val budget = Budget(
+                type = type,
+                amount = amount,
+                categoryName = categoryName,
+                memberId = memberId,
+                startDate = startDate,
+                endDate = endDate,
+                alertThreshold = alertThreshold
+            )
+            
+            budgetRepository.createBudget(budget)
+            loadTotalBudgetStatus()
+        }
+    }
+    
+    /**
+     * 更新预算
+     */
+    fun updateBudget(budget: Budget) {
+        viewModelScope.launch {
+            budgetRepository.updateBudget(budget)
+            loadTotalBudgetStatus()
+        }
+    }
+    
+    /**
+     * 删除预算
+     */
+    fun deleteBudget(budget: Budget) {
+        viewModelScope.launch {
+            budgetRepository.deleteBudget(budget)
+            loadTotalBudgetStatus()
+        }
+    }
+    
+    /**
+     * 切换预算启用状态
+     */
+    fun toggleBudgetEnabled(budget: Budget) {
+        viewModelScope.launch {
+            budgetRepository.updateBudgetEnabled(budget.id, !budget.isEnabled)
+            loadTotalBudgetStatus()
+        }
+    }
+    
+    /**
+     * 显示预算编辑对话框
+     */
+    fun showEditBudgetDialog(budget: Budget? = null) {
+        _editingBudget.value = budget
+        _showBudgetDialog.value = true
+    }
+    
+    /**
+     * 隐藏预算编辑对话框
+     */
+    fun hideBudgetDialog() {
+        _showBudgetDialog.value = false
+        _editingBudget.value = null
+    }
+    
+    /**
+     * 检查预算警报
+     */
+    fun checkBudgetAlerts() {
+        viewModelScope.launch {
+            val alerts = budgetRepository.checkBudgetAlerts()
+            // 这里可以触发通知或其他警报机制
+            // 暂时先不实现，等完成通知功能后再补充
+        }
+    }
+    
+    /**
+     * 清理过期预算
+     */
+    fun cleanupExpiredBudgets() {
+        viewModelScope.launch {
+            budgetRepository.cleanupExpiredBudgets()
+        }
+    }
+}

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

@@ -14,6 +14,7 @@ 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 com.yovinchen.bookkeeping.utils.EncryptionUtils
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.delay
@@ -30,6 +31,7 @@ import org.apache.poi.xssf.usermodel.XSSFWorkbook
 import java.io.File
 import java.io.FileReader
 import java.io.FileWriter
+import java.io.StringWriter
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
@@ -157,15 +159,24 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     fun exportToCSV(context: Context, customDir: File? = null) {
         viewModelScope.launch(Dispatchers.IO) {
             try {
+                val currentSettings = settings.value ?: Settings()
                 val timestamp =
                     SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
-                val fileName = "bookkeeping_backup_$timestamp.csv"
+                val shouldEncrypt = currentSettings.encryptBackup
+                val fileName = if (shouldEncrypt) {
+                    "bookkeeping_backup_$timestamp.csv.enc"
+                } else {
+                    "bookkeeping_backup_$timestamp.csv"
+                }
                 val downloadsDir = customDir ?: Environment.getExternalStoragePublicDirectory(
                     Environment.DIRECTORY_DOWNLOADS
                 )
                 val file = File(downloadsDir, fileName)
 
-                CSVWriter(FileWriter(file)).use { writer ->
+                // 先创建CSV内容到字符串
+                val csvContent = StringWriter().use { stringWriter ->
+                    val writer = CSVWriter(stringWriter)
+                    
                     // 写入头部
                     writer.writeNext(arrayOf("日期", "类型", "金额", "类别", "备注", "成员"))
 
@@ -189,11 +200,25 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
                             )
                         )
                     }
+                    writer.close()
+                    stringWriter.toString()
+                }
+
+                // 根据设置决定是否加密
+                if (shouldEncrypt) {
+                    val encryptedContent = EncryptionUtils.encrypt(csvContent)
+                    file.writeText(encryptedContent)
+                } else {
+                    file.writeText(csvContent)
                 }
 
                 withContext(Dispatchers.Main) {
-                    Toast.makeText(context, "CSV导出成功: ${file.absolutePath}", Toast.LENGTH_LONG)
+                    val message = if (shouldEncrypt) {
-                        .show()
+                        "CSV导出成功（已加密）: ${file.absolutePath}"
+                    } else {
+                        "CSV导出成功: ${file.absolutePath}"
+                    }
+                    Toast.makeText(context, message, Toast.LENGTH_LONG).show()
                 }
             } catch (e: Exception) {
                 e.printStackTrace()
@@ -207,6 +232,9 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     fun exportToExcel(context: Context) {
         viewModelScope.launch(Dispatchers.IO) {
             try {
+                val currentSettings = settings.value ?: Settings()
+                val shouldEncrypt = currentSettings.encryptBackup
+                
                 val workbook = XSSFWorkbook()
                 val sheet = workbook.createSheet("账目记录")
 
@@ -239,18 +267,39 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
 
                 val timestamp =
                     SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
-                val fileName = "bookkeeping_backup_$timestamp.xlsx"
+                val fileName = if (shouldEncrypt) {
+                    "bookkeeping_backup_$timestamp.xlsx.enc"
+                } else {
+                    "bookkeeping_backup_$timestamp.xlsx"
+                }
                 val downloadsDir =
                     Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
                 val file = File(downloadsDir, fileName)
 
-                workbook.write(file.outputStream())
+                if (shouldEncrypt) {
+                    // 将 workbook 写入字节数组
+                    val byteArrayOutputStream = java.io.ByteArrayOutputStream()
+                    workbook.write(byteArrayOutputStream)
+                    val excelBytes = byteArrayOutputStream.toByteArray()
+                    
+                    // 加密字节数组
+                    val encryptedBytes = EncryptionUtils.encryptBytes(excelBytes)
+                    
+                    // 写入加密文件
+                    file.writeBytes(encryptedBytes)
+                } else {
+                    workbook.write(file.outputStream())
+                }
+                
                 workbook.close()
 
                 withContext(Dispatchers.Main) {
-                    Toast.makeText(
+                    val message = if (shouldEncrypt) {
-                        context, "Excel导出成功: ${file.absolutePath}", Toast.LENGTH_LONG
+                        "Excel导出成功（已加密）: ${file.absolutePath}"
-                    ).show()
+                    } else {
+                        "Excel导出成功: ${file.absolutePath}"
+                    }
+                    Toast.makeText(context, message, Toast.LENGTH_LONG).show()
                 }
             } catch (e: Exception) {
                 e.printStackTrace()
@@ -265,10 +314,30 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         viewModelScope.launch(Dispatchers.IO) {
             try {
                 when {
+                    backupFile.name.endsWith(".csv.enc", ignoreCase = true) -> {
+                        // 解密CSV文件
+                        val encryptedContent = backupFile.readText()
+                        val decryptedContent = EncryptionUtils.decrypt(encryptedContent)
+                        val tempFile = File(context.cacheDir, "temp_decrypted.csv")
+                        tempFile.writeText(decryptedContent)
+                        restoreFromCSV(tempFile)
+                        tempFile.delete()
+                    }
+                    
                     backupFile.name.endsWith(".csv", ignoreCase = true) -> {
                         restoreFromCSV(backupFile)
                     }
 
+                    backupFile.name.endsWith(".xlsx.enc", ignoreCase = true) -> {
+                        // 解密Excel文件
+                        val encryptedBytes = backupFile.readBytes()
+                        val decryptedBytes = EncryptionUtils.decryptBytes(encryptedBytes)
+                        val tempFile = File(context.cacheDir, "temp_decrypted.xlsx")
+                        tempFile.writeBytes(decryptedBytes)
+                        restoreFromExcel(tempFile)
+                        tempFile.delete()
+                    }
+                    
                     backupFile.name.endsWith(".xlsx", ignoreCase = true) -> {
                         restoreFromExcel(backupFile)
                     }
@@ -287,7 +356,11 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             } catch (e: Exception) {
                 e.printStackTrace()
                 withContext(Dispatchers.Main) {
-                    Toast.makeText(context, "数据恢复失败: ${e.message}", Toast.LENGTH_LONG).show()
+                    val errorMessage = when {
+                        e.message?.contains("decrypt") == true -> "解密失败，请确认文件未损坏"
+                        else -> "数据恢复失败: ${e.message}"
+                    }
+                    Toast.makeText(context, errorMessage, Toast.LENGTH_LONG).show()
                 }
             }
         }
@@ -343,4 +416,10 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     private suspend fun findMemberIdByName(name: String): Int? {
         return memberDao.getAllMembers().first().find { member -> member.name == name }?.id
     }
+    
+    fun updateSettings(settings: Settings) {
+        viewModelScope.launch {
+            settingsRepository.updateSettings(settings)
+        }
+    }
 }