實作管理者用戶管理、邀請註冊功能

app/api/admin/dashboard/route.ts

@@ -0,0 +1,33 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { UserService } from '@/lib/services/database-service'
+
+const userService = new UserService()
+
+export async function GET(request: NextRequest) {
+  try {
+    // 獲取儀表板統計數據
+    const stats = await userService.getDashboardStats()
+    
+    // 獲取最新活動
+    const recentActivities = await userService.getRecentActivities(10)
+    
+    // 獲取熱門應用
+    const topApps = await userService.getTopApps(5)
+    
+    return NextResponse.json({
+      success: true,
+      data: {
+        stats,
+        recentActivities,
+        topApps
+      }
+    })
+    
+  } catch (error) {
+    console.error('獲取儀表板數據錯誤:', error)
+    return NextResponse.json(
+      { success: false, error: '獲取儀表板數據時發生錯誤' },
+      { status: 500 }
+    )
+  }
+}

app/api/admin/users/[id]/activities/route.ts

@@ -0,0 +1,46 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { UserService } from '@/lib/services/database-service'
+
+const userService = new UserService()
+
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const { id: userId } = await params
+    const { searchParams } = new URL(request.url)
+    const page = parseInt(searchParams.get('page') || '1')
+    const limit = parseInt(searchParams.get('limit') || '10')
+    const search = searchParams.get('search') || ''
+    const startDate = searchParams.get('startDate') || ''
+    const endDate = searchParams.get('endDate') || ''
+    const activityType = searchParams.get('activityType') || 'all'
+
+    if (!userId) {
+      return NextResponse.json(
+        { success: false, error: '用戶 ID 是必需的' },
+        { status: 400 }
+      )
+    }
+
+    const result = await userService.getUserActivities(userId, page, limit, {
+      search,
+      startDate,
+      endDate,
+      activityType
+    })
+
+    return NextResponse.json({
+      success: true,
+      data: result
+    })
+
+  } catch (error) {
+    console.error('獲取用戶活動記錄錯誤:', error)
+    return NextResponse.json(
+      { success: false, error: '獲取用戶活動記錄時發生錯誤' },
+      { status: 500 }
+    )
+  }
+}

app/api/admin/users/[id]/route.ts

@@ -3,71 +3,71 @@ import { UserService } from '@/lib/services/database-service'
 
 const userService = new UserService()
 
-export async function GET(
-  request: NextRequest,
-  { params }: { params: { id: string } }
-) {
-  try {
-    const user = await userService.findById(params.id)
-    
-    if (!user) {
-      return NextResponse.json(
-        { error: '用戶不存在' },
-        { status: 404 }
-      )
-    }
-
-    // 獲取用戶統計
-    const stats = await userService.getUserStatistics(params.id)
-
-    return NextResponse.json({
-      success: true,
-      data: {
-        user,
-        stats
-      }
-    })
-
-  } catch (error) {
-    console.error('獲取用戶詳情錯誤:', error)
-    return NextResponse.json(
-      { error: '獲取用戶詳情時發生錯誤' },
-      { status: 500 }
-    )
-  }
-}
-
 export async function PUT(
   request: NextRequest,
-  { params }: { params: { id: string } }
+  { params }: { params: Promise<{ id: string }> }
 ) {
   try {
-    const updates = await request.json()
+    const { id: userId } = await params
+    const body = await request.json()
+    const { name, department, role, status } = body
 
-    // 移除不允許更新的欄位
-    delete updates.id
-    delete updates.created_at
-    delete updates.password_hash
-
-    const updatedUser = await userService.update(params.id, updates)
-    
-    if (!updatedUser) {
+    if (!userId) {
       return NextResponse.json(
-        { error: '用戶不存在或更新失敗' },
-        { status: 404 }
+        { success: false, error: '用戶 ID 是必需的' },
+        { status: 400 }
       )
     }
 
-    return NextResponse.json({
-      success: true,
-      message: '用戶資料已更新',
-      data: updatedUser
+    if (!name || !department || !role || !status) {
+      return NextResponse.json(
+        { success: false, error: '請填寫所有必填欄位' },
+        { status: 400 }
+      )
+    }
+
+    // 驗證狀態值
+    const validStatuses = ['active', 'inactive', 'invited']
+    if (!validStatuses.includes(status)) {
+      return NextResponse.json(
+        { success: false, error: '無效的狀態值' },
+        { status: 400 }
+      )
+    }
+
+    // 驗證角色值
+    const validRoles = ['user', 'developer', 'admin']
+    if (!validRoles.includes(role)) {
+      return NextResponse.json(
+        { success: false, error: '無效的角色值' },
+        { status: 400 }
+      )
+    }
+
+    const result = await userService.updateUser(userId, {
+      name,
+      department,
+      role,
+      status
     })
 
+    if (result.success) {
+      return NextResponse.json({
+        success: true,
+        message: '用戶資料更新成功',
+        data: result.user
+      })
+    } else {
+      return NextResponse.json(
+        { success: false, error: result.error },
+        { status: 400 }
+      )
+    }
+
   } catch (error) {
     console.error('更新用戶錯誤:', error)
     return NextResponse.json(
-      { error: '更新用戶時發生錯誤' },
+      { success: false, error: '更新用戶時發生錯誤' },
       { status: 500 }
     )
   }
@@ -75,28 +75,36 @@ export async function PUT(
 
 export async function DELETE(
   request: NextRequest,
-  { params }: { params: { id: string } }
+  { params }: { params: Promise<{ id: string }> }
 ) {
   try {
-    // 軟刪除：將 is_active 設為 false
-    const result = await userService.update(params.id, { is_active: false })
+    const { id: userId } = await params
 
-    if (!result) {
+    if (!userId) {
       return NextResponse.json(
-        { error: '用戶不存在或刪除失敗' },
-        { status: 404 }
+        { success: false, error: '用戶 ID 是必需的' },
+        { status: 400 }
       )
     }
 
-    return NextResponse.json({
-      success: true,
-      message: '用戶已刪除'
-    })
+    const result = await userService.deleteUser(userId)
+
+    if (result.success) {
+      return NextResponse.json({
+        success: true,
+        message: '用戶刪除成功'
+      })
+    } else {
+      return NextResponse.json(
+        { success: false, error: result.error },
+        { status: 400 }
+      )
+    }
 
   } catch (error) {
     console.error('刪除用戶錯誤:', error)
     return NextResponse.json(
-      { error: '刪除用戶時發生錯誤' },
+      { success: false, error: '刪除用戶時發生錯誤' },
       { status: 500 }
     )
   }

app/api/admin/users/[id]/stats/route.ts

@@ -0,0 +1,34 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { UserService } from '@/lib/services/database-service'
+
+const userService = new UserService()
+
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const { id: userId } = await params
+
+    if (!userId) {
+      return NextResponse.json(
+        { success: false, error: '用戶 ID 是必需的' },
+        { status: 400 }
+      )
+    }
+
+    const stats = await userService.getUserDetailedStats(userId)
+
+    return NextResponse.json({
+      success: true,
+      data: stats
+    })
+
+  } catch (error) {
+    console.error('獲取用戶統計數據錯誤:', error)
+    return NextResponse.json(
+      { success: false, error: '獲取用戶統計數據時發生錯誤' },
+      { status: 500 }
+    )
+  }
+}

app/api/admin/users/route.ts

@@ -3,6 +3,73 @@ import { UserService } from '@/lib/services/database-service'
 
 const userService = new UserService()
 
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json()
+    const { email, role } = body
+
+    if (!email || !role) {
+      return NextResponse.json(
+        { success: false, error: '請提供電子郵件和角色' },
+        { status: 400 }
+      )
+    }
+
+    // 驗證電子郵件格式
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
+    if (!emailRegex.test(email)) {
+      return NextResponse.json(
+        { success: false, error: '請輸入有效的電子郵件格式' },
+        { status: 400 }
+      )
+    }
+
+    // 驗證角色
+    const validRoles = ['user', 'developer', 'admin']
+    if (!validRoles.includes(role)) {
+      return NextResponse.json(
+        { success: false, error: '無效的角色值' },
+        { status: 400 }
+      )
+    }
+
+    // 檢查電子郵件是否已存在
+    const existingUser = await userService.findByEmail(email)
+    if (existingUser) {
+      return NextResponse.json(
+        { success: false, error: '此電子郵件已被使用' },
+        { status: 400 }
+      )
+    }
+
+    // 創建邀請用戶
+    const result = await userService.createInvitedUser(email, role)
+
+    if (result.success) {
+      return NextResponse.json({
+        success: true,
+        message: '邀請用戶創建成功',
+        data: {
+          user: result.user,
+          invitationLink: result.invitationLink
+        }
+      })
+    } else {
+      return NextResponse.json(
+        { success: false, error: result.error },
+        { status: 400 }
+      )
+    }
+
+  } catch (error) {
+    console.error('創建邀請用戶錯誤:', error)
+    return NextResponse.json(
+      { success: false, error: '創建邀請用戶時發生錯誤' },
+      { status: 500 }
+    )
+  }
+}
+
 export async function GET(request: NextRequest) {
   try {
     const { searchParams } = new URL(request.url)
@@ -14,7 +81,7 @@ export async function GET(request: NextRequest) {
     const status = searchParams.get('status') || ''
 
     // 構建查詢條件
-    let whereConditions = ['is_active = TRUE']
+    let whereConditions = ['status IN ("active", "inactive", "invited")']
     let params: any[] = []
 
     if (search) {
@@ -34,9 +101,11 @@ export async function GET(request: NextRequest) {
 
     if (status && status !== 'all') {
       if (status === 'active') {
-        whereConditions.push('last_login IS NOT NULL AND last_login >= DATE_SUB(NOW(), INTERVAL 30 DAY)')
+        whereConditions.push('status = "active"')
       } else if (status === 'inactive') {
-        whereConditions.push('last_login IS NULL OR last_login < DATE_SUB(NOW(), INTERVAL 30 DAY)')
+        whereConditions.push('status = "inactive"')
+      } else if (status === 'invited') {
+        whereConditions.push('status = "invited"')
       }
     }
 
@@ -54,10 +123,21 @@ export async function GET(request: NextRequest) {
 
     const stats = await userService.getUserStats()
 
+    // 映射用戶數據欄位，將資料庫欄位轉換為前端期望的欄位
+    const mappedUsers = users.map(user => ({
+      ...user,
+      joinDate: user.join_date ? new Date(user.join_date).toLocaleDateString('zh-TW') : '-',
+      lastLogin: user.last_login ? new Date(user.last_login).toLocaleString('zh-TW') : '-',
+      status: user.status, // 直接使用資料庫的 status 欄位
+      totalApps: 0, // 暫時設為 0，後續可以從統計數據中獲取
+      totalReviews: 0, // 暫時設為 0，後續可以從統計數據中獲取
+      totalLikes: user.total_likes || 0
+    }))
+
     return NextResponse.json({
       success: true,
       data: {
-        users,
+        users: mappedUsers,
         pagination: {
           page,
           limit,
@@ -65,12 +145,12 @@ export async function GET(request: NextRequest) {
           totalPages: Math.ceil(total / limit)
         },
         stats: {
-          totalUsers: stats?.total_users || 0,
-          activeUsers: stats?.active_users || 0,
-          adminCount: stats?.admin_count || 0,
-          developerCount: stats?.developer_count || 0,
-          inactiveUsers: stats?.inactive_users || 0,
-          newThisMonth: stats?.new_this_month || 0
+          totalUsers: stats?.totalUsers || 0,
+          activeUsers: stats?.activeUsers || 0,
+          adminCount: stats?.adminCount || 0,
+          developerCount: stats?.developerCount || 0,
+          inactiveUsers: stats?.invitedUsers || 0, // 將 invitedUsers 映射為 inactiveUsers（待註冊）
+          newThisMonth: stats?.newThisMonth || 0
         }
       }
     })
@@ -84,51 +164,3 @@ export async function GET(request: NextRequest) {
   }
 }
 
-export async function POST(request: NextRequest) {
-  try {
-    const { email, role } = await request.json()
-
-    if (!email || !role) {
-      return NextResponse.json(
-        { error: '請提供電子郵件和角色' },
-        { status: 400 }
-      )
-    }
-
-    // 檢查郵箱是否已存在
-    const existingUser = await userService.findByEmail(email)
-    if (existingUser) {
-      return NextResponse.json(
-        { error: '該電子郵件地址已被使用' },
-        { status: 400 }
-      )
-    }
-
-    // 生成邀請 token
-    const { v4: uuidv4 } = require('uuid')
-    const invitationToken = uuidv4()
-
-    // 創建邀請記錄（這裡可以存儲到邀請表或臨時表）
-    // 暫時返回邀請連結
-    const baseUrl = process.env.NEXT_PUBLIC_APP_URL || 'http://localhost:3000'
-    const invitationLink = `${baseUrl}/register?token=${invitationToken}&email=${encodeURIComponent(email)}&role=${encodeURIComponent(role)}`
-
-    return NextResponse.json({
-      success: true,
-      message: '用戶邀請已創建',
-      data: {
-        invitationLink,
-        token: invitationToken,
-        email,
-        role
-      }
-    })
-
-  } catch (error) {
-    console.error('創建用戶邀請錯誤:', error)
-    return NextResponse.json(
-      { error: '創建用戶邀請時發生錯誤' },
-      { status: 500 }
-    )
-  }
-}

app/api/auth/register/route.ts

@@ -23,42 +23,69 @@ export async function POST(request: NextRequest) {
       )
     }
 
-    // 檢查用戶是否已存在
-    const existingUser = await userService.findByEmail(email)
-    if (existingUser) {
-      return NextResponse.json(
-        { error: '該電子郵件已被註冊' },
-        { status: 409 }
-      )
-    }
-
     // 加密密碼
     const saltRounds = 12
     const password_hash = await bcrypt.hash(password, saltRounds)
 
-    // 創建新用戶
-    const newUser = {
-      id: uuidv4(),
-      name,
-      email,
-      password_hash,
-      department,
-      role: role as 'user' | 'developer' | 'admin',
-      join_date: new Date().toISOString().split('T')[0],
-      total_likes: 0,
-      total_views: 0,
-      is_active: true
+    // 檢查是否為邀請用戶（狀態為 invited）
+    const invitedUser = await userService.findInvitedUserByEmail(email)
+    
+    if (invitedUser) {
+      // 更新邀請用戶為正式用戶
+      const updatedUser = await userService.completeInvitedUserRegistration(
+        invitedUser.id,
+        name,
+        department,
+        password_hash,
+        role
+      )
+      
+      if (updatedUser.success) {
+        const { password_hash: _, ...userWithoutPassword } = updatedUser.user
+        return NextResponse.json({
+          success: true,
+          user: userWithoutPassword
+        })
+      } else {
+        return NextResponse.json(
+          { error: updatedUser.error || '完成註冊失敗' },
+          { status: 400 }
+        )
+      }
+    } else {
+      // 檢查用戶是否已存在（活躍用戶）
+      const existingUser = await userService.findByEmail(email)
+      if (existingUser) {
+        return NextResponse.json(
+          { error: '該電子郵件已被註冊' },
+          { status: 409 }
+        )
+      }
+
+      // 創建新用戶
+      const newUser = {
+        id: uuidv4(),
+        name,
+        email,
+        password_hash,
+        department,
+        role: role as 'user' | 'developer' | 'admin',
+        join_date: new Date().toISOString().split('T')[0],
+        total_likes: 0,
+        total_views: 0,
+        status: 'active' as 'active' | 'inactive' | 'invited'
+      }
+
+      const createdUser = await userService.create(newUser)
+
+      // 返回用戶信息（不包含密碼）
+      const { password_hash: _, ...userWithoutPassword } = createdUser
+      return NextResponse.json({
+        success: true,
+        user: userWithoutPassword
+      })
     }
 
-    const createdUser = await userService.create(newUser)
-
-    // 返回用戶信息（不包含密碼）
-    const { password_hash: _, ...userWithoutPassword } = createdUser
-    return NextResponse.json({
-      success: true,
-      user: userWithoutPassword
-    })
-
   } catch (error) {
     console.error('註冊錯誤:', error)
     return NextResponse.json(

app/register/page.tsx

@@ -130,6 +130,7 @@ export default function RegisterPage() {
           email: formData.email,
           password: formData.password,
           department: formData.department,
+          role: isInvitedUser ? invitedRole : 'user', // 如果是邀請用戶，使用邀請的角色
         })
 
         if (success) {

components/admin/user-management.tsx

@@ -33,9 +33,17 @@ import {
   RefreshCw,
   Copy,
   Link,
+  Heart,
+  ThumbsUp,
+  Star,
+  Plus,
   ExternalLink,
   Code,
   Users,
+  ChevronLeft,
+  ChevronRight,
+  Filter,
+  X,
 } from "lucide-react"
 
 export function UserManagement() {
@@ -45,6 +53,25 @@ export function UserManagement() {
   const [selectedRole, setSelectedRole] = useState("all")
   const [selectedStatus, setSelectedStatus] = useState("all")
   const [selectedUser, setSelectedUser] = useState<any>(null)
+  const [userActivities, setUserActivities] = useState<any[]>([])
+  const [userStats, setUserStats] = useState<any>({
+    totalApps: 0,
+    totalReviews: 0,
+    totalLikes: 0,
+    loginDays: 0
+  })
+  const [activityPagination, setActivityPagination] = useState({
+    page: 1,
+    limit: 10,
+    total: 0,
+    totalPages: 0
+  })
+  const [activityFilters, setActivityFilters] = useState({
+    search: '',
+    startDate: '',
+    endDate: '',
+    activityType: 'all'
+  })
   const [showUserDetail, setShowUserDetail] = useState(false)
   const [showInviteUser, setShowInviteUser] = useState(false)
   const [showEditUser, setShowEditUser] = useState(false)
@@ -71,6 +98,74 @@ export function UserManagement() {
     setIsClient(true)
   }, [])
 
+  // 載入用戶統計數據
+  const loadUserStats = async (userId: string) => {
+    try {
+      const response = await fetch(`/api/admin/users/${userId}/stats`)
+      const data = await response.json()
+      
+      if (data.success) {
+        setUserStats(data.data)
+      } else {
+        console.error('載入用戶統計數據失敗:', data.error)
+        setUserStats({
+          totalApps: 0,
+          totalReviews: 0,
+          totalLikes: 0,
+          loginDays: 0
+        })
+      }
+    } catch (error) {
+      console.error('載入用戶統計數據錯誤:', error)
+      setUserStats({
+        totalApps: 0,
+        totalReviews: 0,
+        totalLikes: 0,
+        loginDays: 0
+      })
+    }
+  }
+
+  // 載入用戶活動記錄
+  const loadUserActivities = async (userId: string, page: number = 1, filters: any = {}) => {
+    try {
+      const params = new URLSearchParams({
+        page: page.toString(),
+        limit: activityPagination.limit.toString(),
+        search: filters.search || '',
+        startDate: filters.startDate || '',
+        endDate: filters.endDate || '',
+        activityType: filters.activityType || 'all'
+      })
+
+      const response = await fetch(`/api/admin/users/${userId}/activities?${params}`)
+      const data = await response.json()
+      
+      if (data.success) {
+        setUserActivities(data.data.activities)
+        setActivityPagination(data.data.pagination)
+      } else {
+        console.error('載入活動記錄失敗:', data.error)
+        setUserActivities([])
+        setActivityPagination({
+          page: 1,
+          limit: 10,
+          total: 0,
+          totalPages: 0
+        })
+      }
+    } catch (error) {
+      console.error('載入活動記錄錯誤:', error)
+      setUserActivities([])
+      setActivityPagination({
+        page: 1,
+        limit: 10,
+        total: 0,
+        totalPages: 0
+      })
+    }
+  }
+
   // 載入用戶數據
   const loadUsers = async () => {
     if (!isClient) return
@@ -133,6 +228,51 @@ export function UserManagement() {
   const handleViewUser = (user: any) => {
     setSelectedUser(user)
     setShowUserDetail(true)
+    // 重置活動記錄狀態
+    setActivityPagination({
+      page: 1,
+      limit: 10,
+      total: 0,
+      totalPages: 0
+    })
+    setActivityFilters({
+      search: '',
+      startDate: '',
+      endDate: '',
+      activityType: 'all'
+    })
+    // 重置統計數據狀態
+    setUserStats({
+      totalApps: 0,
+      totalReviews: 0,
+      totalLikes: 0,
+      loginDays: 0
+    })
+    // 載入用戶統計數據和活動記錄
+    loadUserStats(user.id)
+    loadUserActivities(user.id, 1, {
+      search: '',
+      startDate: '',
+      endDate: '',
+      activityType: 'all'
+    })
+  }
+
+  // 處理活動記錄篩選
+  const handleActivityFilter = (newFilters: any) => {
+    const updatedFilters = { ...activityFilters, ...newFilters }
+    setActivityFilters(updatedFilters)
+    if (selectedUser) {
+      loadUserActivities(selectedUser.id, 1, updatedFilters)
+    }
+  }
+
+  // 處理活動記錄分頁
+  const handleActivityPageChange = (page: number) => {
+    setActivityPagination(prev => ({ ...prev, page }))
+    if (selectedUser) {
+      loadUserActivities(selectedUser.id, page, activityFilters)
+    }
   }
 
   const handleEditUser = (user: any) => {
@@ -155,18 +295,51 @@ export function UserManagement() {
   const handleToggleUserStatus = async (userId: string) => {
     setIsLoading(true)
 
-    // 模擬 API 調用
-    await new Promise((resolve) => setTimeout(resolve, 1000))
+    try {
+      // 找到要切換狀態的用戶
+      const user = users.find(u => u.id === userId)
+      if (!user) {
+        setError("用戶不存在")
+        setIsLoading(false)
+        return
+      }
 
-    setUsers(
-      users.map((user) =>
-        user.id === userId ? { ...user, status: user.status === "active" ? "inactive" : "active" } : user,
-      ),
-    )
+      const newStatus = user.status === "active" ? "inactive" : "active"
+
+      const response = await fetch(`/api/admin/users/${userId}`, {
+        method: 'PUT',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          name: user.name,
+          department: user.department,
+          role: user.role,
+          status: newStatus
+        })
+      })
+
+      const data = await response.json()
+
+      if (data.success) {
+        // 更新本地用戶列表
+        setUsers(
+          users.map((u) =>
+            u.id === userId ? { ...u, status: newStatus } : u
+          )
+        )
+
+        setSuccess("用戶狀態更新成功！")
+        setTimeout(() => setSuccess(""), 3000)
+      } else {
+        setError(data.error || "更新用戶狀態失敗")
+      }
+    } catch (error) {
+      console.error('更新用戶狀態錯誤:', error)
+      setError("更新用戶狀態時發生錯誤")
+    }
 
     setIsLoading(false)
-    setSuccess("用戶狀態更新成功！")
-    setTimeout(() => setSuccess(""), 3000)
   }
 
   const handleChangeUserRole = async (userId: string, newRole: string) => {
@@ -222,13 +395,13 @@ export function UserManagement() {
 
       if (data.success) {
         const newInvitation = {
-          id: Date.now().toString(),
-          name: "",
-          email: inviteEmail,
-          department: "",
-          role: "",
+          id: data.data.user.id,
+          name: data.data.user.name || "",
+          email: data.data.user.email,
+          department: data.data.user.department || "",
+          role: data.data.user.role,
           status: "invited",
-          joinDate: "",
+          joinDate: data.data.user.join_date ? new Date(data.data.user.join_date).toLocaleDateString('zh-TW') : "",
           lastLogin: "",
           totalApps: 0,
           totalReviews: 0,
@@ -327,15 +500,38 @@ export function UserManagement() {
 
     setIsLoading(true)
 
-    // 模擬 API 調用
-    await new Promise((resolve) => setTimeout(resolve, 1500))
+    try {
+      const response = await fetch(`/api/admin/users/${editUser.id}`, {
+        method: 'PUT',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          name: editUser.name,
+          department: editUser.department,
+          role: editUser.role,
+          status: editUser.status
+        })
+      })
 
-    setUsers(users.map((user) => (user.id === editUser.id ? { ...user, ...editUser } : user)))
+      const data = await response.json()
+
+      if (data.success) {
+        // 更新本地用戶列表
+        setUsers(users.map((user) => (user.id === editUser.id ? { ...user, ...editUser } : user)))
+
+        setShowEditUser(false)
+        setSuccess("用戶資料更新成功！")
+        setTimeout(() => setSuccess(""), 3000)
+      } else {
+        setError(data.error || "更新用戶失敗")
+      }
+    } catch (error) {
+      console.error('更新用戶錯誤:', error)
+      setError("更新用戶時發生錯誤")
+    }
 
     setIsLoading(false)
-    setShowEditUser(false)
-    setSuccess("用戶資料更新成功！")
-    setTimeout(() => setSuccess(""), 3000)
   }
 
   const confirmDeleteUser = async () => {
@@ -343,16 +539,30 @@ export function UserManagement() {
 
     setIsLoading(true)
 
-    // 模擬 API 調用
-    await new Promise((resolve) => setTimeout(resolve, 1500))
+    try {
+      const response = await fetch(`/api/admin/users/${userToDelete.id}`, {
+        method: 'DELETE'
+      })
 
-    setUsers(users.filter((user) => user.id !== userToDelete.id))
+      const data = await response.json()
+
+      if (data.success) {
+        // 從本地用戶列表中移除
+        setUsers(users.filter((user) => user.id !== userToDelete.id))
+
+        setShowDeleteConfirm(false)
+        setUserToDelete(null)
+        setSuccess("用戶刪除成功！")
+        setTimeout(() => setSuccess(""), 3000)
+      } else {
+        setError(data.error || "刪除用戶失敗")
+      }
+    } catch (error) {
+      console.error('刪除用戶錯誤:', error)
+      setError("刪除用戶時發生錯誤")
+    }
 
     setIsLoading(false)
-    setShowDeleteConfirm(false)
-    setUserToDelete(null)
-    setSuccess("用戶刪除成功！")
-    setTimeout(() => setSuccess(""), 3000)
   }
 
   const getRoleColor = (role: string) => {
@@ -407,6 +617,44 @@ export function UserManagement() {
     }
   }
 
+  // 獲取活動圖標
+  const getActivityIcon = (iconName: string) => {
+    switch (iconName) {
+      case 'Calendar':
+        return <Calendar className="w-4 h-4" />
+      case 'Heart':
+        return <Heart className="w-4 h-4" />
+      case 'ThumbsUp':
+        return <ThumbsUp className="w-4 h-4" />
+      case 'Eye':
+        return <Eye className="w-4 h-4" />
+      case 'Star':
+        return <Star className="w-4 h-4" />
+      case 'Plus':
+        return <Plus className="w-4 h-4" />
+      default:
+        return <Calendar className="w-4 h-4" />
+    }
+  }
+
+  // 獲取活動顏色
+  const getActivityColor = (color: string) => {
+    switch (color) {
+      case 'blue':
+        return 'text-blue-600'
+      case 'red':
+        return 'text-red-600'
+      case 'green':
+        return 'text-green-600'
+      case 'purple':
+        return 'text-purple-600'
+      case 'yellow':
+        return 'text-yellow-600'
+      default:
+        return 'text-gray-600'
+    }
+  }
+
   const getRoleIcon = (role: string) => {
     switch (role) {
       case "admin":
@@ -1140,22 +1388,141 @@ export function UserManagement() {
                     <p className="text-gray-500">用戶尚未註冊，暫無活動記錄</p>
                   </div>
                 ) : (
-                  <div className="space-y-3">
-                    <div className="flex items-center space-x-3 p-3 bg-gray-50 rounded-lg">
-                      <Calendar className="w-4 h-4 text-blue-600" />
-                      <div>
-                        <p className="text-sm font-medium">登入系統</p>
-                        <p className="text-xs text-gray-500">2024-01-20 16:45</p>
+                  <>
+                    {/* 篩選控件 */}
+                    <div className="space-y-3">
+                      <div className="flex flex-wrap items-end justify-between gap-3">
+                        <div className="flex flex-wrap gap-3 items-end">
+                          <div className="flex-1 min-w-[180px]">
+                            <Label htmlFor="activity-search" className="text-xs">搜尋活動</Label>
+                            <Input
+                              id="activity-search"
+                              placeholder="搜尋活動內容..."
+                              value={activityFilters.search}
+                              onChange={(e) => handleActivityFilter({ search: e.target.value })}
+                              className="mt-1 h-8 text-sm"
+                            />
+                          </div>
+                          <div className="min-w-[100px]">
+                            <Label htmlFor="activity-type" className="text-xs">活動類型</Label>
+                            <Select
+                              value={activityFilters.activityType}
+                              onValueChange={(value) => handleActivityFilter({ activityType: value })}
+                            >
+                              <SelectTrigger className="mt-1 h-8 text-sm">
+                                <SelectValue />
+                              </SelectTrigger>
+                              <SelectContent>
+                                <SelectItem value="all">全部類型</SelectItem>
+                                <SelectItem value="login">登入</SelectItem>
+                                <SelectItem value="favorite">收藏</SelectItem>
+                                <SelectItem value="like">按讚</SelectItem>
+                                <SelectItem value="view">查看</SelectItem>
+                                <SelectItem value="rating">評價</SelectItem>
+                                <SelectItem value="create">創建</SelectItem>
+                              </SelectContent>
+                            </Select>
+                          </div>
+                          <div className="min-w-[120px]">
+                            <Label htmlFor="start-date" className="text-xs">開始日期</Label>
+                            <Input
+                              id="start-date"
+                              type="date"
+                              value={activityFilters.startDate}
+                              onChange={(e) => handleActivityFilter({ startDate: e.target.value })}
+                              className="mt-1 h-8 text-sm"
+                            />
+                          </div>
+                          <div className="min-w-[120px]">
+                            <Label htmlFor="end-date" className="text-xs">結束日期</Label>
+                            <Input
+                              id="end-date"
+                              type="date"
+                              value={activityFilters.endDate}
+                              onChange={(e) => handleActivityFilter({ endDate: e.target.value })}
+                              className="mt-1 h-8 text-sm"
+                            />
+                          </div>
+                        </div>
+                        <Button
+                          variant="outline"
+                          size="sm"
+                          onClick={() => handleActivityFilter({
+                            search: '',
+                            startDate: '',
+                            endDate: '',
+                            activityType: 'all'
+                          })}
+                          className="h-8 px-3 text-xs"
+                        >
+                          <X className="w-3 h-3 mr-1" />
+                          清除
+                        </Button>
                       </div>
                     </div>
-                    <div className="flex items-center space-x-3 p-3 bg-gray-50 rounded-lg">
-                      <Eye className="w-4 h-4 text-green-600" />
-                      <div>
-                        <p className="text-sm font-medium">查看應用：智能對話助手</p>
-                        <p className="text-xs text-gray-500">2024-01-20 15:30</p>
+
+                    {/* 活動記錄列表 */}
+                    {userActivities.length === 0 ? (
+                      <div className="text-center py-8">
+                        <Calendar className="w-12 h-12 text-gray-400 mx-auto mb-4" />
+                        <p className="text-gray-500">暫無活動記錄</p>
                       </div>
-                    </div>
-                  </div>
+                    ) : (
+                      <>
+                        <div className="space-y-3">
+                          {userActivities.map((activity, index) => (
+                            <div key={index} className="flex items-center space-x-3 p-3 bg-gray-50 rounded-lg">
+                              <div className={`${getActivityColor(activity.color)}`}>
+                                {getActivityIcon(activity.icon)}
+                              </div>
+                              <div className="flex-1">
+                                <p className="text-sm font-medium">{activity.action_text}</p>
+                                <p className="text-xs text-gray-500">
+                                  {new Date(activity.created_at).toLocaleString('zh-TW', {
+                                    year: 'numeric',
+                                    month: '2-digit',
+                                    day: '2-digit',
+                                    hour: '2-digit',
+                                    minute: '2-digit'
+                                  })}
+                                </p>
+                              </div>
+                            </div>
+                          ))}
+                        </div>
+
+                        {/* 分頁控件 */}
+                        {activityPagination.totalPages > 1 && (
+                          <div className="flex items-center justify-between pt-4">
+                            <div className="text-sm text-gray-500">
+                              顯示第 {((activityPagination.page - 1) * activityPagination.limit) + 1} - {Math.min(activityPagination.page * activityPagination.limit, activityPagination.total)} 項，共 {activityPagination.total} 項
+                            </div>
+                            <div className="flex items-center space-x-2">
+                              <Button
+                                variant="outline"
+                                size="sm"
+                                onClick={() => handleActivityPageChange(activityPagination.page - 1)}
+                                disabled={activityPagination.page <= 1}
+                              >
+                                <ChevronLeft className="w-4 h-4" />
+                              </Button>
+                              <span className="text-sm">
+                                第 {activityPagination.page} 頁，共 {activityPagination.totalPages} 頁
+                              </span>
+                              <Button
+                                variant="outline"
+                                size="sm"
+                                onClick={() => handleActivityPageChange(activityPagination.page + 1)}
+                                disabled={activityPagination.page >= activityPagination.totalPages}
+                              >
+                                <ChevronRight className="w-4 h-4" />
+                              </Button>
+                            </div>
+                          </div>
+                        )}
+                      </>
+                    )}
+                  </>
                 )}
               </TabsContent>
 
@@ -1164,7 +1531,7 @@ export function UserManagement() {
                   <Card>
                     <CardContent className="p-4">
                       <div className="text-center">
-                        <p className="text-2xl font-bold text-blue-600">{selectedUser.totalApps}</p>
+                        <p className="text-2xl font-bold text-blue-600">{userStats.totalApps}</p>
                         <p className="text-sm text-gray-600">創建應用</p>
                       </div>
                     </CardContent>
@@ -1172,7 +1539,7 @@ export function UserManagement() {
                   <Card>
                     <CardContent className="p-4">
                       <div className="text-center">
-                        <p className="text-2xl font-bold text-green-600">{selectedUser.totalReviews}</p>
+                        <p className="text-2xl font-bold text-green-600">{userStats.totalReviews}</p>
                         <p className="text-sm text-gray-600">撰寫評價</p>
                       </div>
                     </CardContent>
@@ -1180,7 +1547,7 @@ export function UserManagement() {
                   <Card>
                     <CardContent className="p-4">
                       <div className="text-center">
-                        <p className="text-2xl font-bold text-purple-600">{selectedUser.totalLikes}</p>
+                        <p className="text-2xl font-bold text-purple-600">{userStats.totalLikes}</p>
                         <p className="text-sm text-gray-600">獲得讚數</p>
                       </div>
                     </CardContent>
@@ -1188,9 +1555,7 @@ export function UserManagement() {
                   <Card>
                     <CardContent className="p-4">
                       <div className="text-center">
-                        <p className="text-2xl font-bold text-orange-600">
-                          {selectedUser.status === "invited" ? 0 : 15}
-                        </p>
+                        <p className="text-2xl font-bold text-orange-600">{userStats.loginDays}</p>
                         <p className="text-sm text-gray-600">登入天數</p>
                       </div>
                     </CardContent>

contexts/auth-context.tsx

@@ -61,6 +61,7 @@ interface RegisterData {
   email: string
   password: string
   department: string
+  role?: string
 }
 
 const AuthContext = createContext<AuthContextType | undefined>(undefined)

lib/models.ts

@@ -14,7 +14,7 @@ export interface User {
   join_date: string;
   total_likes: number;
   total_views: number;
-  is_active: boolean;
+  status: 'active' | 'inactive' | 'invited';
   last_login?: string;
   phone?: string;
   location?: string;
@@ -34,7 +34,7 @@ export interface UserProfile {
   join_date: string;
   total_likes: number;
   total_views: number;
-  is_active: boolean;
+  status: 'active' | 'inactive' | 'invited';
   last_login?: string;
   phone?: string;
   location?: string;

lib/services/database-service.ts

@@ -3,6 +3,8 @@
 // =====================================================
 
 import { db } from '../database';
+import bcrypt from 'bcryptjs';
+import crypto from 'crypto';
 import type {
   User,
   Judge,
@@ -37,7 +39,7 @@ export class UserService {
   // 創建用戶
   async create(userData: Omit<User, 'id' | 'created_at' | 'updated_at'>): Promise<User> {
     const sql = `
-      INSERT INTO users (id, name, email, password_hash, avatar, department, role, join_date, total_likes, total_views, is_active, last_login)
+      INSERT INTO users (id, name, email, password_hash, avatar, department, role, join_date, total_likes, total_views, status, last_login)
       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
     `;
     const params = [
@@ -51,7 +53,7 @@ export class UserService {
       userData.join_date,
       userData.total_likes,
       userData.total_views,
-      userData.is_active,
+      userData.status,
       userData.last_login || null
     ];
     
@@ -61,13 +63,13 @@ export class UserService {
 
   // 根據郵箱獲取用戶
   async findByEmail(email: string): Promise<User | null> {
-    const sql = 'SELECT * FROM users WHERE email = ? AND is_active = TRUE';
+    const sql = 'SELECT * FROM users WHERE email = ? AND status = "active"';
     return await db.queryOne<User>(sql, [email]);
   }
 
   // 根據ID獲取用戶
   async findById(id: string): Promise<User | null> {
-    const sql = 'SELECT * FROM users WHERE id = ? AND is_active = TRUE';
+    const sql = 'SELECT * FROM users WHERE id = ? AND status = "active"';
     return await db.queryOne<User>(sql, [id]);
   }
 
@@ -111,7 +113,7 @@ export class UserService {
     const { search, department, role, status, page = 1, limit = 10 } = filters;
     
     // 構建查詢條件
-    let whereConditions = ['is_active = TRUE'];
+    let whereConditions: string[] = [];
     let params: any[] = [];
 
     if (search) {
@@ -131,9 +133,14 @@ export class UserService {
 
     if (status && status !== 'all') {
       if (status === 'active') {
-        whereConditions.push('last_login IS NOT NULL AND last_login >= DATE_SUB(NOW(), INTERVAL 30 DAY)');
+        whereConditions.push('status = ? AND last_login IS NOT NULL AND last_login >= DATE_SUB(NOW(), INTERVAL 30 DAY)');
+        params.push('active');
       } else if (status === 'inactive') {
-        whereConditions.push('last_login IS NULL OR last_login < DATE_SUB(NOW(), INTERVAL 30 DAY)');
+        whereConditions.push('status = ?');
+        params.push('inactive');
+      } else if (status === 'invited') {
+        whereConditions.push('status = ?');
+        params.push('invited');
       }
     }
 
@@ -149,7 +156,7 @@ export class UserService {
     const usersSql = `
       SELECT 
         id, name, email, avatar, department, role, join_date, 
-        total_likes, total_views, is_active, last_login, created_at, updated_at
+        total_likes, total_views, status, last_login, created_at, updated_at
       FROM users 
       ${whereClause}
       ORDER BY created_at DESC
@@ -166,19 +173,20 @@ export class UserService {
     activeUsers: number;
     adminCount: number;
     developerCount: number;
+    invitedUsers: number;
     inactiveUsers: number;
     newThisMonth: number;
   }> {
     const sql = `
       SELECT 
         COUNT(*) as total_users,
-        COUNT(CASE WHEN last_login IS NOT NULL AND last_login >= DATE_SUB(NOW(), INTERVAL 30 DAY) THEN 1 END) as active_users,
+        COUNT(CASE WHEN status = 'active' AND last_login IS NOT NULL AND last_login >= DATE_SUB(CURDATE(), INTERVAL 30 DAY) THEN 1 END) as active_users,
         COUNT(CASE WHEN role = 'admin' THEN 1 END) as admin_count,
         COUNT(CASE WHEN role = 'developer' THEN 1 END) as developer_count,
-        COUNT(CASE WHEN last_login IS NULL OR last_login < DATE_SUB(NOW(), INTERVAL 30 DAY) THEN 1 END) as inactive_users,
-        COUNT(CASE WHEN created_at >= DATE_SUB(NOW(), INTERVAL 30 DAY) THEN 1 END) as new_this_month
+        COUNT(CASE WHEN status = 'invited' THEN 1 END) as invited_users,
+        COUNT(CASE WHEN status = 'inactive' THEN 1 END) as inactive_users,
+        COUNT(CASE WHEN created_at >= DATE_SUB(CURDATE(), INTERVAL 30 DAY) THEN 1 END) as new_this_month
       FROM users
-      WHERE is_active = TRUE
     `;
     const result = await this.query(sql);
     const stats = result[0] || {};
@@ -188,16 +196,544 @@ export class UserService {
       activeUsers: stats.active_users || 0,
       adminCount: stats.admin_count || 0,
       developerCount: stats.developer_count || 0,
+      invitedUsers: stats.invited_users || 0,
       inactiveUsers: stats.inactive_users || 0,
       newThisMonth: stats.new_this_month || 0
     };
   }
 
+  // 獲取用戶活動記錄
+  async getUserActivities(
+    userId: string, 
+    page: number = 1, 
+    limit: number = 10, 
+    filters: {
+      search?: string;
+      startDate?: string;
+      endDate?: string;
+      activityType?: string;
+    } = {}
+  ): Promise<{ activities: any[]; pagination: any }> {
+    // 構建篩選條件
+    let whereConditions = [];
+    let dateFilter = '';
+    
+    // 日期篩選
+    if (filters.startDate && filters.endDate) {
+      dateFilter = `AND created_at BETWEEN '${filters.startDate} 00:00:00' AND '${filters.endDate} 23:59:59'`;
+    } else if (filters.startDate) {
+      dateFilter = `AND created_at >= '${filters.startDate} 00:00:00'`;
+    } else if (filters.endDate) {
+      dateFilter = `AND created_at <= '${filters.endDate} 23:59:59'`;
+    }
+    
+    // 活動類型篩選
+    let activityTypeFilter = '';
+    if (filters.activityType && filters.activityType !== 'all') {
+      activityTypeFilter = `AND activity_type = '${filters.activityType}'`;
+    }
+    
+    // 搜尋篩選
+    let searchFilter = '';
+    if (filters.search) {
+      searchFilter = `AND action_text LIKE '%${filters.search}%'`;
+    }
+    
+    // 使用字符串插值避免 UNION ALL 參數化查詢問題
+    const baseSql = `
+      SELECT 
+        'login' as activity_type,
+        '登入系統' as action_text,
+        'Calendar' as icon,
+        'blue' as color,
+        u.last_login as created_at,
+        NULL as app_name,
+        NULL as app_id
+      FROM users u
+      WHERE u.id = '${userId}' AND u.last_login IS NOT NULL
+      
+      UNION ALL
+      
+      SELECT 
+        'favorite' as activity_type,
+        CONCAT('收藏應用：', a.name) as action_text,
+        'Heart' as icon,
+        'red' as color,
+        uf.created_at,
+        a.name as app_name,
+        a.id as app_id
+      FROM user_favorites uf
+      JOIN apps a ON uf.app_id = a.id
+      WHERE uf.user_id = '${userId}'
+      
+      UNION ALL
+      
+      SELECT 
+        'like' as activity_type,
+        CONCAT('按讚應用：', a.name) as action_text,
+        'ThumbsUp' as icon,
+        'green' as color,
+        ul.liked_at as created_at,
+        a.name as app_name,
+        a.id as app_id
+      FROM user_likes ul
+      JOIN apps a ON ul.app_id = a.id
+      WHERE ul.user_id = '${userId}'
+      
+      UNION ALL
+      
+      SELECT 
+        'view' as activity_type,
+        CONCAT('查看應用：', a.name) as action_text,
+        'Eye' as icon,
+        'purple' as color,
+        uv.viewed_at as created_at,
+        a.name as app_name,
+        a.id as app_id
+      FROM user_views uv
+      JOIN apps a ON uv.app_id = a.id
+      WHERE uv.user_id = '${userId}'
+      
+      UNION ALL
+      
+      SELECT 
+        'rating' as activity_type,
+        CONCAT('評價應用：', a.name, ' (', ur.rating, '分)') as action_text,
+        'Star' as icon,
+        'yellow' as color,
+        ur.rated_at as created_at,
+        a.name as app_name,
+        a.id as app_id
+      FROM user_ratings ur
+      JOIN apps a ON ur.app_id = a.id
+      WHERE ur.user_id = '${userId}'
+      
+      UNION ALL
+      
+      SELECT 
+        'create' as activity_type,
+        CONCAT('創建應用：', a.name) as action_text,
+        'Plus' as icon,
+        'blue' as color,
+        a.created_at,
+        a.name as app_name,
+        a.id as app_id
+      FROM apps a
+      WHERE a.creator_id = '${userId}'
+    `;
+    
+    // 先獲取總數
+    const countSql = `
+      SELECT COUNT(*) as total FROM (
+        ${baseSql}
+      ) as activities
+      WHERE 1=1 ${dateFilter} ${activityTypeFilter} ${searchFilter}
+    `;
+    
+    const countResult = await this.query(countSql, []);
+    const total = countResult[0]?.total || 0;
+    const totalPages = Math.ceil(total / limit);
+    const offset = (page - 1) * limit;
+    
+    // 獲取分頁數據
+    const dataSql = `
+      SELECT * FROM (
+        ${baseSql}
+      ) as activities
+      WHERE 1=1 ${dateFilter} ${activityTypeFilter} ${searchFilter}
+      ORDER BY created_at DESC
+      LIMIT ${limit} OFFSET ${offset}
+    `;
+    
+    const activities = await this.query(dataSql, []);
+    
+    return {
+      activities,
+      pagination: {
+        page,
+        limit,
+        total,
+        totalPages
+      }
+    };
+  }
+
+  // 獲取用戶詳細統計數據
+  async getUserDetailedStats(userId: string): Promise<any> {
+    // 獲取創建應用數量
+    const appsSql = `
+      SELECT COUNT(*) as total_apps
+      FROM apps 
+      WHERE creator_id = '${userId}' AND is_active = TRUE
+    `;
+    const appsResult = await this.query(appsSql, []);
+    const totalApps = appsResult[0]?.total_apps || 0;
+
+    // 獲取撰寫評價數量
+    const reviewsSql = `
+      SELECT COUNT(*) as total_reviews
+      FROM user_ratings 
+      WHERE user_id = '${userId}'
+    `;
+    const reviewsResult = await this.query(reviewsSql, []);
+    const totalReviews = reviewsResult[0]?.total_reviews || 0;
+
+    // 獲取獲得讚數（用戶創建的應用獲得的總讚數）
+    const likesSql = `
+      SELECT COALESCE(SUM(a.likes_count), 0) as total_likes
+      FROM apps a
+      WHERE a.creator_id = '${userId}' AND a.is_active = TRUE
+    `;
+    const likesResult = await this.query(likesSql, []);
+    const totalLikes = likesResult[0]?.total_likes || 0;
+
+    // 獲取登入天數（從註冊日期到現在的天數）
+    const loginDaysSql = `
+      SELECT DATEDIFF(CURDATE(), join_date) as login_days
+      FROM users 
+      WHERE id = '${userId}'
+    `;
+    const loginDaysResult = await this.query(loginDaysSql, []);
+    const loginDays = loginDaysResult[0]?.login_days || 0;
+
+    return {
+      totalApps,
+      totalReviews,
+      totalLikes,
+      loginDays
+    };
+  }
+
+  // 更新用戶資料
+  async updateUser(userId: string, userData: {
+    name: string;
+    department: string;
+    role: string;
+    status: string;
+  }): Promise<{ success: boolean; user?: any; error?: string }> {
+    try {
+      const sql = `
+        UPDATE users 
+        SET name = ?, department = ?, role = ?, status = ?, updated_at = NOW()
+        WHERE id = ?
+      `;
+      
+      await this.query(sql, [
+        userData.name,
+        userData.department,
+        userData.role,
+        userData.status,
+        userId
+      ]);
+
+      // 獲取更新後的用戶資料
+      const updatedUserSql = `
+        SELECT id, name, email, department, role, status, join_date, last_login, total_likes, total_views, created_at, updated_at
+        FROM users 
+        WHERE id = ?
+      `;
+      
+      const updatedUser = await this.queryOne(updatedUserSql, [userId]);
+      
+      if (!updatedUser) {
+        return { success: false, error: '用戶不存在' };
+      }
+
+      return { success: true, user: updatedUser };
+    } catch (error) {
+      console.error('更新用戶錯誤:', error);
+      return { success: false, error: '更新用戶時發生錯誤' };
+    }
+  }
+
+  // 刪除用戶
+  async deleteUser(userId: string): Promise<{ success: boolean; error?: string }> {
+    try {
+      // 檢查用戶是否存在
+      const checkUserSql = `SELECT id FROM users WHERE id = ?`;
+      const user = await this.queryOne(checkUserSql, [userId]);
+      
+      if (!user) {
+        return { success: false, error: '用戶不存在' };
+      }
+
+      // 刪除用戶（由於外鍵約束，相關的活動記錄也會被自動刪除）
+      const deleteSql = `DELETE FROM users WHERE id = ?`;
+      await this.query(deleteSql, [userId]);
+
+      return { success: true };
+    } catch (error) {
+      console.error('刪除用戶錯誤:', error);
+      return { success: false, error: '刪除用戶時發生錯誤' };
+    }
+  }
+
+  // 創建邀請用戶
+  async createInvitedUser(email: string, role: string): Promise<{ success: boolean; user?: any; invitationLink?: string; error?: string }> {
+    try {
+      // 生成邀請 token
+      const invitationToken = Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15)
+      
+      // 創建邀請用戶記錄
+      const userId = crypto.randomUUID()
+      const sql = `
+        INSERT INTO users (id, name, email, password_hash, department, role, status, join_date, created_at, updated_at)
+        VALUES (?, ?, ?, ?, ?, ?, ?, CURDATE(), NOW(), NOW())
+      `;
+      
+      // 為邀請用戶創建一個臨時密碼（用戶註冊時會覆蓋）
+      const tempPassword = 'temp_' + Math.random().toString(36).substring(2, 15)
+      const tempPasswordHash = await bcrypt.hash(tempPassword, 10)
+      
+      await this.query(sql, [
+        userId,
+        '', // 姓名留空，用戶註冊時填寫
+        email,
+        tempPasswordHash,
+        '', // 部門留空，用戶註冊時填寫
+        role,
+        'invited'
+      ]);
+
+      // 獲取創建的用戶資料
+      const userSql = `
+        SELECT id, name, email, department, role, status, join_date, created_at, updated_at
+        FROM users 
+        WHERE id = ?
+      `;
+      
+      const user = await this.queryOne(userSql, [userId])
+      
+      if (!user) {
+        return { success: false, error: '創建邀請用戶失敗' }
+      }
+
+      // 生成邀請連結
+      const invitationLink = `${process.env.NEXT_PUBLIC_BASE_URL || 'http://localhost:3000'}/register?token=${invitationToken}&email=${encodeURIComponent(email)}&role=${role}`
+
+      return { 
+        success: true, 
+        user: {
+          ...user,
+          invitationToken,
+          invitationLink
+        },
+        invitationLink
+      }
+    } catch (error) {
+      console.error('創建邀請用戶錯誤:', error);
+      return { success: false, error: '創建邀請用戶時發生錯誤' };
+    }
+  }
+
+  // 查找邀請用戶（狀態為 invited）
+  async findInvitedUserByEmail(email: string): Promise<any | null> {
+    const sql = 'SELECT * FROM users WHERE email = ? AND status = "invited"';
+    return await this.queryOne(sql, [email]);
+  }
+
+  // 完成邀請用戶註冊
+  async completeInvitedUserRegistration(
+    userId: string, 
+    name: string, 
+    department: string, 
+    passwordHash: string, 
+    role: string
+  ): Promise<{ success: boolean; user?: any; error?: string }> {
+    try {
+      const sql = `
+        UPDATE users 
+        SET name = ?, department = ?, password_hash = ?, role = ?, status = 'active', updated_at = NOW()
+        WHERE id = ? AND status = 'invited'
+      `;
+      
+      await this.query(sql, [name, department, passwordHash, role, userId]);
+
+      // 獲取更新後的用戶資料
+      const updatedUserSql = `
+        SELECT id, name, email, department, role, status, join_date, last_login, total_likes, total_views, created_at, updated_at
+        FROM users 
+        WHERE id = ?
+      `;
+      
+      const updatedUser = await this.queryOne(updatedUserSql, [userId]);
+      
+      if (!updatedUser) {
+        return { success: false, error: '用戶不存在或狀態不正確' };
+      }
+
+      return { success: true, user: updatedUser };
+    } catch (error) {
+      console.error('完成邀請用戶註冊錯誤:', error);
+      return { success: false, error: '完成註冊時發生錯誤' };
+    }
+  }
+
   // 通用查詢方法
   async query<T = any>(sql: string, params: any[] = []): Promise<T[]> {
     return await db.query<T>(sql, params);
   }
 
+  // 獲取儀表板統計數據
+  async getDashboardStats(): Promise<{
+    totalUsers: number;
+    activeUsers: number;
+    totalApps: number;
+    totalCompetitions: number;
+    totalReviews: number;
+    totalViews: number;
+    totalLikes: number;
+    newAppsThisMonth: number;
+    activeCompetitions: number;
+    growthRate: number;
+  }> {
+    try {
+      // 用戶統計
+      const userStats = await this.getUserStats();
+      
+      // 應用統計
+      const appStatsSql = `
+        SELECT 
+          COUNT(*) as total_apps,
+          COUNT(CASE WHEN created_at >= DATE_SUB(CURDATE(), INTERVAL 30 DAY) THEN 1 END) as new_apps_this_month,
+          COALESCE(SUM(view_count), 0) as total_views,
+          COALESCE(SUM(like_count), 0) as total_likes
+        FROM apps 
+        WHERE is_active = TRUE
+      `;
+      const appStats = await this.queryOne(appStatsSql);
+      
+      // 評論統計
+      const reviewStatsSql = `
+        SELECT COUNT(*) as total_reviews
+        FROM user_ratings
+      `;
+      const reviewStats = await this.queryOne(reviewStatsSql);
+      
+      // 競賽統計
+      const competitionStatsSql = `
+        SELECT 
+          COUNT(*) as total_competitions,
+          COUNT(CASE WHEN status = 'active' THEN 1 END) as active_competitions
+        FROM competitions
+      `;
+      const competitionStats = await this.queryOne(competitionStatsSql);
+      
+      // 計算增長率（與上個月比較）
+      const lastMonthUsersSql = `
+        SELECT COUNT(*) as last_month_users
+        FROM users 
+        WHERE created_at >= DATE_SUB(CURDATE(), INTERVAL 60 DAY) 
+        AND created_at < DATE_SUB(CURDATE(), INTERVAL 30 DAY)
+      `;
+      const lastMonthUsers = await this.queryOne(lastMonthUsersSql);
+      
+      const currentMonthUsers = userStats.newThisMonth;
+      const growthRate = lastMonthUsers?.last_month_users > 0 
+        ? Math.round(((currentMonthUsers - lastMonthUsers.last_month_users) / lastMonthUsers.last_month_users) * 100)
+        : 0;
+      
+      return {
+        totalUsers: userStats.totalUsers,
+        activeUsers: userStats.activeUsers,
+        totalApps: appStats?.total_apps || 0,
+        totalCompetitions: competitionStats?.total_competitions || 0,
+        totalReviews: reviewStats?.total_reviews || 0,
+        totalViews: appStats?.total_views || 0,
+        totalLikes: appStats?.total_likes || 0,
+        newAppsThisMonth: appStats?.new_apps_this_month || 0,
+        activeCompetitions: competitionStats?.active_competitions || 0,
+        growthRate: growthRate
+      };
+    } catch (error) {
+      console.error('獲取儀表板統計數據錯誤:', error);
+      return {
+        totalUsers: 0,
+        activeUsers: 0,
+        totalApps: 0,
+        totalCompetitions: 0,
+        totalReviews: 0,
+        totalViews: 0,
+        totalLikes: 0,
+        newAppsThisMonth: 0,
+        activeCompetitions: 0,
+        growthRate: 0
+      };
+    }
+  }
+
+  // 獲取最新活動
+  async getRecentActivities(limit: number = 10): Promise<any[]> {
+    try {
+      const sql = `
+        SELECT 
+          'user_register' as activity_type,
+          '用戶註冊' as activity_name,
+          CONCAT(name, ' 註冊了平台') as description,
+          created_at as activity_time,
+          'user' as icon_type,
+          'blue' as color
+        FROM users 
+        WHERE status = 'active'
+        ORDER BY created_at DESC
+        LIMIT ?
+      `;
+      
+      const activities = await this.query(sql, [limit]);
+      
+      return activities.map(activity => ({
+        id: `user_${activity.activity_time}`,
+        type: activity.activity_type,
+        message: activity.description,
+        time: new Date(activity.activity_time).toLocaleString('zh-TW'),
+        icon: 'Users',
+        color: 'text-blue-600'
+      }));
+    } catch (error) {
+      console.error('獲取最新活動錯誤:', error);
+      return [];
+    }
+  }
+
+  // 獲取熱門應用
+  async getTopApps(limit: number = 5): Promise<any[]> {
+    try {
+      const sql = `
+        SELECT 
+          a.id,
+          a.name,
+          a.description,
+          a.view_count as views,
+          a.like_count as likes,
+          COALESCE(AVG(ur.rating), 0) as rating,
+          a.category,
+          a.created_at
+        FROM apps a
+        LEFT JOIN user_ratings ur ON a.id = ur.app_id
+        WHERE a.is_active = TRUE
+        GROUP BY a.id, a.name, a.description, a.view_count, a.like_count, a.category, a.created_at
+        ORDER BY (a.view_count + a.like_count * 2) DESC
+        LIMIT ?
+      `;
+      
+      const apps = await this.query(sql, [limit]);
+      
+      return apps.map(app => ({
+        id: app.id,
+        name: app.name,
+        description: app.description,
+        views: app.views || 0,
+        likes: app.likes || 0,
+        rating: Math.round(app.rating * 10) / 10,
+        category: app.category,
+        created_at: app.created_at
+      }));
+    } catch (error) {
+      console.error('獲取熱門應用錯誤:', error);
+      return [];
+    }
+  }
+
   // 通用單一查詢方法
   async queryOne<T = any>(sql: string, params: any[] = []): Promise<T | null> {
     return await db.queryOne<T>(sql, params);