feat(v1.5): 触摸键盘、格子大字计数、客户停用/删除、按钮收纳、7 天徽标、抽屉时钟

1) 工作台速录
- 手机尾号输入框下方新增 3×4 触摸小键盘（1-9、0、⌫、✓），点 ✓ 直接提交；实体键盘仍可输入
- 抽屉顶部新增秒级时钟（HH:MM:SS），位于日期标题上方

2) 日历格子
- 移除排单缩略信息（客户名/套餐色签/“x/y 单”小字）
- 保留左侧打手颜色竖条，中间改为大字「待完成 / 总数」，例如 1/2 = 还剩 1 单、共 2 单
- 大屏格子按此前约定保持原样

3) 客户停用 / 恢复 / 彻底删除
- customers 新增 archived 列（0/1）；停用后默认从客户列表、日历、待办、大屏、到期提醒、徽标中隐藏，订阅与打卡记录原样保留
- 恢复后立即回到日历；列表右上角可切换「显示已停用」，已停用行带标记
- 彻底删除为二次确认操作，依赖外键级联清理订阅、打卡、暂停、追加记录与加急标记
- 停用/恢复/删除都会写入操作日志

4) 按钮收纳
- 任务行只露出「完成」，跳过 / 加急（取消加急）/ 追加收进「⋯」菜单；已完成行只露「撤销打卡」等，点空白处自动收起
- 加急、跳过等原有能力不变，仅入口折叠

5) 顶栏
- 在「今日到期」「3 天内到期」右侧新增「7 天内到期」徽标，固定统计未来 7 天

6) 视觉
- 移除管理端背景的横线装饰，改为纯底色；大屏网格背景保留

数据库兼容性：
- 只新增 customers.archived 一列，老库启动时自动 ALTER，可重复迁移；原有表结构与接口不变

测试：
- 新增单测 TestCustomerArchiveFilters：停用后日历/到期/徽标/搜索/列表全部过滤、恢复回日历、彻底删除级联清理订阅与打卡
- 功能验证 20 项（键盘、格子计数、折叠菜单、7 天徽标、时钟、停用/恢复/删除、背景）全部通过
- 原有 119 项验收回归全绿；go vet / go test ./... 通过；版本号 1.5.0

internal/store/customers.go

@@ -28,6 +28,9 @@ type Customer struct {
 	AssigneeName  string
 	AssigneeColor string
 
+	// Archived 停用（软删除）：默认隐藏，订阅保留但不上日历
+	Archived bool
+
 	// 列表聚合
 	SubCount int
 	Summary  string
@@ -46,19 +49,21 @@ func (c *Customer) TagList() []string {
 	return out
 }
 
-const customerCols = `id,tail,name,game_name,game_server,contact,tags,source,note,created_at,updated_at,IFNULL(assignee_id,0),IFNULL((SELECT u.display_name FROM users u WHERE u.id=customers.assignee_id),''),IFNULL((SELECT u.color FROM users u WHERE u.id=customers.assignee_id),'')`
+const customerCols = `id,tail,name,game_name,game_server,contact,tags,source,note,created_at,updated_at,IFNULL(assignee_id,0),IFNULL((SELECT u.display_name FROM users u WHERE u.id=customers.assignee_id),''),IFNULL((SELECT u.color FROM users u WHERE u.id=customers.assignee_id),''),IFNULL(archived,0)`
 
 func scanCustomer(row interface{ Scan(dest ...any) error }) (*Customer, error) {
 	var c Customer
+	var archived int
 	err := row.Scan(&c.ID, &c.Tail, &c.Name, &c.GameName, &c.GameServer, &c.Contact,
 		&c.Tags, &c.Source, &c.Note, &c.CreatedAt, &c.UpdatedAt,
-		&c.AssigneeID, &c.AssigneeName, &c.AssigneeColor)
+		&c.AssigneeID, &c.AssigneeName, &c.AssigneeColor, &archived)
 	if err != nil {
 		if errors.Is(err, sql.ErrNoRows) {
 			return nil, ErrNotFound
 		}
 		return nil, err
 	}
+	c.Archived = archived == 1
 	return &c, nil
 }
 
@@ -96,12 +101,19 @@ func (db *DB) Customer(id int64) (*Customer, error) {
 }
 
 // ListCustomers 分页查询客户，并聚合订阅摘要。
-func (db *DB) ListCustomers(q string, limit, offset int, today string, warnDays int) ([]Customer, int, error) {
+func (db *DB) ListCustomers(q string, limit, offset int, today string, warnDays int, includeArchived bool) ([]Customer, int, error) {
 	where := "1=1"
 	args := []any{}
+	if !includeArchived {
+		where = "IFNULL(archived,0)=0"
+	}
 	if q = strings.TrimSpace(q); q != "" {
 		like := "%" + q + "%"
-		where = "(tail LIKE ? OR name LIKE ? OR game_name LIKE ? OR contact LIKE ? OR tags LIKE ?)"
+		if includeArchived {
+			where = "(tail LIKE ? OR name LIKE ? OR game_name LIKE ? OR contact LIKE ? OR tags LIKE ?)"
+		} else {
+			where = "IFNULL(archived,0)=0 AND (tail LIKE ? OR name LIKE ? OR game_name LIKE ? OR contact LIKE ? OR tags LIKE ?)"
+		}
 		args = append(args, like, like, like, like, like)
 	}
 	var total int
@@ -202,7 +214,7 @@ func (db *DB) FindCustomerByTailName(tail, name string) (*Customer, error) {
 // CustomerCount 客户总数。
 func (db *DB) CustomerCount() (int, error) {
 	var n int
-	err := db.sql.QueryRow(`SELECT COUNT(*) FROM customers`).Scan(&n)
+	err := db.sql.QueryRow(`SELECT COUNT(*) FROM customers WHERE IFNULL(archived,0)=0`).Scan(&n)
 	return n, err
 }
 
@@ -212,14 +224,14 @@ func (db *DB) CustomersByTail(tail string) ([]Customer, error) {
 	if tail == "" {
 		return nil, nil
 	}
-	out, err := db.queryCustomers(`SELECT `+customerCols+` FROM customers WHERE tail = ? ORDER BY id`, tail)
+	out, err := db.queryCustomers(`SELECT `+customerCols+` FROM customers WHERE IFNULL(archived,0)=0 AND tail = ? ORDER BY id`, tail)
 	if err != nil {
 		return nil, err
 	}
 	if len(out) > 0 {
 		return out, nil
 	}
-	return db.queryCustomers(`SELECT `+customerCols+` FROM customers WHERE tail LIKE ? ORDER BY id LIMIT 20`, "%"+tail+"%")
+	return db.queryCustomers(`SELECT `+customerCols+` FROM customers WHERE IFNULL(archived,0)=0 AND tail LIKE ? ORDER BY id LIMIT 20`, "%"+tail+"%")
 }
 
 func (db *DB) queryCustomers(q string, args ...any) ([]Customer, error) {
@@ -238,3 +250,38 @@ func (db *DB) queryCustomers(q string, args ...any) ([]Customer, error) {
 	}
 	return out, rows.Err()
 }
+
+// SetCustomerArchived 停用/恢复客户。停用后其订阅保留，但不再上日历与大屏。
+func (db *DB) SetCustomerArchived(id int64, archived bool) error {
+	v := 0
+	if archived {
+		v = 1
+	}
+	res, err := db.sql.Exec(`UPDATE customers SET archived=?, updated_at=? WHERE id=?`, v, nowStamp(), id)
+	if err != nil {
+		return err
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// DeleteCustomer 彻底删除客户；订阅、打卡、暂停、追加记录随外键级联删除。
+func (db *DB) DeleteCustomer(id int64) error {
+	res, err := db.sql.Exec(`DELETE FROM customers WHERE id=?`, id)
+	if err != nil {
+		return err
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// CountArchivedCustomers 统计已停用客户数。
+func (db *DB) CountArchivedCustomers() (int, error) {
+	var n int
+	err := db.sql.QueryRow(`SELECT COUNT(*) FROM customers WHERE IFNULL(archived,0)=1`).Scan(&n)
+	return n, err
+}