實作管理者用戶管理、邀請註冊功能

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(