修复仲裁退款并新增免押额度

backend/migrations/000001_init.sql

@@ -20,6 +20,7 @@ CREATE TABLE IF NOT EXISTS users (
   realname_status VARCHAR(32) NOT NULL DEFAULT 'unverified' COMMENT '实名状态: unverified未实名, pending审核中, verified已实名, failed失败',
   risk_status VARCHAR(32) NOT NULL DEFAULT 'normal' COMMENT '风控状态: normal正常, warning警告, frozen冻结',
   credit_score INT NOT NULL DEFAULT 100 COMMENT '信用分',
+  deposit_free_quota DECIMAL(12,2) NOT NULL DEFAULT 0.00 COMMENT '免押总额度',
   status VARCHAR(32) NOT NULL DEFAULT 'active' COMMENT '账号状态: active活跃, inactive停用, banned封禁',
   last_login_at DATETIME NULL COMMENT '最后登录时间',
   created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
@@ -118,7 +119,9 @@ CREATE TABLE IF NOT EXISTS rental_orders (
   estimated_duration_hours INT NOT NULL DEFAULT 24 COMMENT '预计租用时长(小时)',
   rent_amount DECIMAL(12,2) NOT NULL DEFAULT 0.00 COMMENT '租金总额',
   owner_rent_amount DECIMAL(12,2) NOT NULL DEFAULT 0.00 COMMENT '号主实得租金',
-  deposit_amount DECIMAL(12,2) NOT NULL DEFAULT 0.00 COMMENT '押金金额',
+  deposit_amount DECIMAL(12,2) NOT NULL DEFAULT 0.00 COMMENT '实际收取押金金额',
+  deposit_original_amount DECIMAL(12,2) NOT NULL DEFAULT 0.00 COMMENT '商品原始押金金额',
+  deposit_waived_amount DECIMAL(12,2) NOT NULL DEFAULT 0.00 COMMENT '本单免押抵扣金额',
   platform_fee DECIMAL(12,2) NOT NULL DEFAULT 0.00 COMMENT '平台手续费',
   account_snapshot JSON NULL COMMENT '账号快照(下单时的账号状态)',
   status VARCHAR(32) NOT NULL DEFAULT 'pending_payment' COMMENT '订单状态: pending_payment待支付, active进行中, completed已完成, cancelled已取消, closed已关闭',
@@ -558,6 +561,7 @@ INSERT INTO permissions (code, name, resource, action) VALUES
 ('dashboard:view',        '查看仪表盘',       'dashboard',      'view'),
 ('user:view',             '查看用户',         'user',           'view'),
 ('user:freeze',           '冻结用户',         'user',           'freeze'),
+('user:deposit_free',     '设置免押额度',     'user',           'deposit_free'),
 ('user:unfreeze',         '解冻用户',         'user',           'unfreeze'),
 ('order:view',            '查看订单',         'order',          'view'),
 ('order:close',           '关闭订单',         'order',          'close'),
@@ -619,7 +623,7 @@ WHERE r.code = 'cs' AND p.code IN ('dashboard:view', 'user:view', 'dispute:view'
 -- ops 角色权限
 INSERT IGNORE INTO role_permissions (role_id, permission_id)
 SELECT r.id, p.id FROM roles r, permissions p
-WHERE r.code = 'ops' AND p.code IN ('dashboard:view', 'user:view', 'user:freeze', 'user:unfreeze', 'order:view', 'order:close', 'order:mark_abnormal', 'listing:view', 'listing:approve', 'listing:reject', 'listing:offline', 'dispute:view', 'audit_log:view', 'announcement:view', 'announcement:manage');
+WHERE r.code = 'ops' AND p.code IN ('dashboard:view', 'user:view', 'user:freeze', 'user:unfreeze', 'user:deposit_free', 'order:view', 'order:close', 'order:mark_abnormal', 'listing:view', 'listing:approve', 'listing:reject', 'listing:offline', 'dispute:view', 'audit_log:view', 'announcement:view', 'announcement:manage');
 
 -- finance 角色权限
 INSERT IGNORE INTO role_permissions (role_id, permission_id)