feat(duty): make duty time range a single-select dict like work plans

Add duty_time_range dictionary with day/night presets, parse typed ranges on ensure, and replace time pickers with allow-create select in the schedule dialog.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/scripts/migrate_20260820_duty_time_range_dict.sql

@@ -0,0 +1,74 @@
+-- backend/scripts/migrate_20260820_duty_time_range_dict.sql
+-- 值班排班：值班时段字典（可单选 + allow-create）
+-- 可重复执行
+
+SET NAMES utf8mb4;
+
+INSERT INTO `sys_dict_type` (
+  `id`, `dict_name`, `dict_type`, `tenant_no`, `order_num`, `remark`,
+  `create_by`, `create_dept_id`, `create_time`, `update_by`, `update_time`, `del_flag`
+)
+SELECT
+  'DUTYDICTTYPE00000000000000000003',
+  '值班时段',
+  'duty_time_range',
+  'shanxia2.0',
+  92,
+  '值班排班时段选项',
+  '',
+  '',
+  NOW(),
+  '',
+  NOW(),
+  0
+FROM DUAL
+WHERE NOT EXISTS (
+  SELECT 1 FROM `sys_dict_type`
+  WHERE `dict_type` = 'duty_time_range'
+    AND `tenant_no` = 'shanxia2.0'
+    AND `del_flag` = 0
+);
+
+INSERT INTO `sys_dict_data` (
+  `id`, `dict_label`, `dict_value`, `tag_type`, `dict_type`, `tenant_no`, `order_num`, `remark`,
+  `create_by`, `create_dept_id`, `create_time`, `update_by`, `update_time`, `del_flag`
+)
+SELECT * FROM (
+  SELECT
+    'DUTYDICTDATA0000000000000000006' AS id,
+    '08:00–18:00' AS dict_label,
+    '08:00|18:00|0' AS dict_value,
+    '' AS tag_type,
+    'duty_time_range' AS dict_type,
+    'shanxia2.0' AS tenant_no,
+    1 AS order_num,
+    NULL AS remark,
+    '' AS create_by,
+    '' AS create_dept_id,
+    NOW() AS create_time,
+    '' AS update_by,
+    NOW() AS update_time,
+    0 AS del_flag
+  UNION ALL SELECT
+    'DUTYDICTDATA0000000000000000007',
+    '18:00–次日07:00',
+    '18:00|07:00|1',
+    '',
+    'duty_time_range',
+    'shanxia2.0',
+    2,
+    NULL,
+    '',
+    '',
+    NOW(),
+    '',
+    NOW(),
+    0
+) AS t
+WHERE NOT EXISTS (
+  SELECT 1 FROM `sys_dict_data` d
+  WHERE d.tenant_no = t.tenant_no
+    AND d.dict_type = t.dict_type
+    AND d.dict_value = t.dict_value
+    AND d.del_flag = 0
+);