feat(pl): 装送货段增加同市标记，并同步额度证件与计划表单。

同市易制毒段只校验购买证；同步 Web/H5 表单、额度统计展示与相关回归测试。

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

docs/sql/migrations/2026-11-09-plan-stop-same-city.sql

@@ -0,0 +1,31 @@
+-- 装货段、送货段增加「是否同市」。同市的易制毒段只校验、扣减购买证。
+-- MySQL 5.7。可重复执行。历史数据默认 0，仍按购买证和运输证同时校验。
+SET NAMES utf8mb4;
+
+SET @schema_name = DATABASE();
+
+SET @load_exists = (
+  SELECT COUNT(*) FROM information_schema.COLUMNS
+  WHERE TABLE_SCHEMA = @schema_name AND TABLE_NAME = 'pl_plan_load' AND COLUMN_NAME = 'same_city'
+);
+SET @load_sql = IF(
+  @load_exists = 0,
+  'ALTER TABLE pl_plan_load ADD COLUMN same_city tinyint NOT NULL DEFAULT 0 COMMENT ''是否同市 0-否 1-是；为 1 时本段易制毒只校验购买证'' AFTER dibang_direction',
+  'SELECT 1'
+);
+PREPARE load_stmt FROM @load_sql;
+EXECUTE load_stmt;
+DEALLOCATE PREPARE load_stmt;
+
+SET @delivery_exists = (
+  SELECT COUNT(*) FROM information_schema.COLUMNS
+  WHERE TABLE_SCHEMA = @schema_name AND TABLE_NAME = 'pl_plan_delivery' AND COLUMN_NAME = 'same_city'
+);
+SET @delivery_sql = IF(
+  @delivery_exists = 0,
+  'ALTER TABLE pl_plan_delivery ADD COLUMN same_city tinyint NOT NULL DEFAULT 0 COMMENT ''是否同市 0-否 1-是；为 1 时本段易制毒只校验购买证'' AFTER dibang_direction',
+  'SELECT 1'
+);
+PREPARE delivery_stmt FROM @delivery_sql;
+EXECUTE delivery_stmt;
+DEALLOCATE PREPARE delivery_stmt;