fix: skip NC/Mail steps for manager tenant in account scheduler

Manager tenant accounts don't have an NC container, so NC user
creation and Mail setup should be skipped (marked as success).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/services/scheduler/schedule_account.py

@@ -77,6 +77,13 @@ def run_account_check(schedule_log_id: int, db: Session):
             result.mailbox_done_at = now_tw()
             fail_reasons.append(f"mailbox: {e}")
 
+        # [3] NC user + Mail（manager 租戶無 NC container，跳過）
+        if tenant.is_manager:
+            result.nc_result = True
+            result.nc_done_at = now_tw()
+            result.nc_mail_result = True
+            result.nc_mail_done_at = now_tw()
+        else:
             # [3] NC user check
             try:
                 from app.core.config import settings as _cfg
@@ -97,7 +104,6 @@ def run_account_check(schedule_log_id: int, db: Session):
                 fail_reasons.append(f"nc: {e}")
 
             # [3.5] NC 台灣國定假日行事曆訂閱
-        # 前置條件：NC 帳號已存在；MKCALENDAR 為 idempotent（已存在回傳 405 視為成功）
             TW_HOLIDAYS_ICS_URL = "https://www.officeholidays.com/ics-clean/taiwan"
             if result.nc_result:
                 try:
@@ -116,7 +122,6 @@ def run_account_check(schedule_log_id: int, db: Session):
                     logger.warning(f"NC calendar subscribe error [{account.sso_account}]: {e}")
 
             # [4] NC Mail 帳號設定
-        # 前置條件：NC 帳號已建立 + mailbox 已建立
             try:
                 if result.nc_result and result.mailbox_result:
                     import paramiko
@@ -130,7 +135,6 @@ def run_account_check(schedule_log_id: int, db: Session):
                     ssh.connect(_cfg.DOCKER_SSH_HOST, username=_cfg.DOCKER_SSH_USER, timeout=15)
 
                     def _ssh_run(cmd, timeout=60):
-                    """執行 SSH 指令並回傳輸出，超時返回空字串"""
                         _, stdout, _ = ssh.exec_command(cmd)
                         stdout.channel.settimeout(timeout)
                         try:
@@ -139,7 +143,6 @@ def run_account_check(schedule_log_id: int, db: Session):
                             out = ""
                         return out
 
-                # 確認是否已設定（occ mail:account:export 回傳帳號列表）
                     export_out = _ssh_run(
                         f"docker exec -u www-data {nc_container} "
                         f"php /var/www/html/occ mail:account:export {account.sso_account} 2>/dev/null"