R59 A1-A6：极简考勤打卡

- 新增 AttendanceRecord 与 AttendancePolicy 模型
- 上下班打卡、今日状态、月度统计端点
- 考勤管理页面（我的/团队/设置三 Tab）
- 移动端快速打卡入口
- 管理员补卡与审计日志
- 单测覆盖打卡幂等、迟到计算、工时计算、权限边界

server/prisma/schema.prisma

@@ -636,6 +636,7 @@ model Employee {
   lifecycle_events                     EmployeeLifecycleEvent[]
   checklist_tasks                      EmployeeChecklistTask[]
   presence_records                     EmployeePresence[]
+  attendance_records                   AttendanceRecord[]
   weekly_reports                       WeeklyReport[]
   todo_items_assigned                  TodoItem[]                    @relation("TodoAssignee")
   todo_items_created                   TodoItem[]                    @relation("TodoCreator")
@@ -1836,6 +1837,47 @@ model EmployeePresence {
   @@map("employee_presence")
 }
 
+model AttendanceRecord {
+  id               String   @id @default(uuid()) @db.Uuid
+  employee_id      String   @db.Uuid
+  work_date        DateTime @db.Date
+  clock_in_at      DateTime?
+  clock_out_at     DateTime?
+  work_minutes     Int?
+  is_late          Boolean  @default(false)
+  late_minutes     Int      @default(0)
+  is_early_leave   Boolean  @default(false)
+  early_minutes    Int      @default(0)
+  note             String?
+  source           String   @default("web") @db.VarChar(16)
+
+  created_at DateTime @default(now())
+  updated_at DateTime @default(now()) @updatedAt
+  updated_by String?  @db.Uuid
+
+  employee Employee @relation(fields: [employee_id], references: [id], onDelete: Cascade)
+
+  @@unique([employee_id, work_date], map: "attendance_records_employee_date_ux")
+  @@index([work_date], map: "idx_attendance_records_work_date")
+  @@map("attendance_records")
+}
+
+model AttendancePolicy {
+  id                     String  @id @default(uuid()) @db.Uuid
+  work_start_time        String  @default("09:00") @db.VarChar(5)
+  work_end_time          String  @default("18:00") @db.VarChar(5)
+  lunch_start_time       String  @default("12:00") @db.VarChar(5)
+  lunch_end_time         String  @default("13:00") @db.VarChar(5)
+  late_tolerance_minutes Int     @default(0)
+  enabled                Boolean @default(true)
+
+  created_at DateTime @default(now())
+  updated_at DateTime @default(now()) @updatedAt
+  updated_by String?  @db.Uuid
+
+  @@map("attendance_policies")
+}
+
 model WeeklyReport {
   id              String             @id @default(uuid()) @db.Uuid
   employee_id     String             @db.Uuid