feat: 实现预算管理功能界面

1. 预算管理界面
   - 创建 BudgetScreen 预算管理主界面
   - 支持总览、分类预算、成员预算三个标签页
   - 实现预算状态可视化（进度条、超支提醒）
   - 预算项目的启用/禁用切换

2. 预算编辑功能
   - 创建 BudgetEditDialog 预算编辑对话框
   - 支持设置预算类型、金额、预警阈值
   - 分类预算和成员预算的选择器
   - 自动设置月度周期

3. 业务逻辑
   - 创建 BudgetViewModel 管理预算状态
   - 实现预算的创建、更新、删除功能
   - 预算状态的实时计算和更新

4. 导航集成
   - 在设置页面添加预算管理入口
   - 更新导航系统支持预算管理界面
   - 添加预算管理路由

5. 文档更新
   - 更新 README 版本历史
   - 标记预算管理功能为基本完成
   - 更新功能进度状态

注：界面已完成，待实现预算超支提醒和分析报告功能

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

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

.claude/settings.local.json

@@ -1,7 +1,10 @@
 {
   "permissions": {
     "allow": [
-      "Bash(./gradlew:*)"
+      "Bash(./gradlew:*)",
+      "Bash(git push:*)",
+      "Bash(git branch:*)",
+      "Bash(git add:*)"
     ],
     "deny": []
   }

README.md

@@ -69,14 +69,14 @@
 - [x] 定期自动备份
 - [x] 备份加密功能
 
-### 5. 预算管理 (进行中 🚀)
+### 5. 预算管理 (基本完成 ✨)
 - [x] 预算数据模型设计
 - [x] 数据库架构实现
-- [ ] 预算管理界面
+- [x] 预算管理界面
-- [ ] 月度预算设置
+- [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 🔄)
@@ -127,6 +127,10 @@
   - 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
 
 ### v1.4
 - 数据安全功能

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"
@@ -148,10 +152,17 @@ 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,
                 arguments = listOf(

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

@@ -31,6 +31,7 @@ import com.yovinchen.bookkeeping.viewmodel.*
 fun SettingsScreen(
     currentTheme: ThemeMode,
     onThemeChange: (ThemeMode) -> Unit,
+    onNavigateToBudget: () -> Unit = {},
     viewModel: SettingsViewModel = viewModel(),
     memberViewModel: MemberViewModel = viewModel()
 ) {
@@ -77,6 +78,17 @@ fun SettingsScreen(
 
         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
         ListItem(
             headlineContent = { Text("主题设置") },

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()
+        }
+    }
+}