Merge branch 'refactor/backend-architecture' into development

api/migrations_legacy/add_orders_table.sql

@@ -0,0 +1,26 @@
+-- 添加订单表和用户订阅到期时间字段
+-- 执行时间: 2026-02
+
+-- 1. 为 users 表添加 subscription_expires_at 字段
+ALTER TABLE users ADD COLUMN IF NOT EXISTS subscription_expires_at TIMESTAMP WITH TIME ZONE DEFAULT NULL;
+
+-- 2. 创建 orders 表
+CREATE TABLE IF NOT EXISTS orders (
+    id VARCHAR NOT NULL PRIMARY KEY,
+    user_id VARCHAR NOT NULL REFERENCES users(id),
+    plan_id VARCHAR NOT NULL,
+    plan_name VARCHAR NOT NULL,
+    amount INTEGER NOT NULL,
+    currency VARCHAR DEFAULT 'CNY',
+    payment_method VARCHAR NOT NULL,
+    status VARCHAR DEFAULT 'pending',
+    trade_no VARCHAR,
+    paid_at TIMESTAMP WITH TIME ZONE,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    expired_at TIMESTAMP WITH TIME ZONE
+);
+
+-- 3. 创建索引
+CREATE INDEX IF NOT EXISTS ix_orders_user_id ON orders(user_id);
+CREATE INDEX IF NOT EXISTS ix_orders_trade_no ON orders(trade_no);
+CREATE INDEX IF NOT EXISTS ix_orders_status ON orders(status);