更新

backend/database/schema.sql

@@ -71,3 +71,18 @@ CREATE TRIGGER users_updated_at
     BEFORE UPDATE ON users
     FOR EACH ROW
     EXECUTE FUNCTION update_updated_at();
+
+-- 8. 订单表（支付宝付费）
+CREATE TABLE IF NOT EXISTS orders (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id UUID REFERENCES users(id) ON DELETE CASCADE,
+    out_trade_no TEXT UNIQUE NOT NULL,
+    amount DECIMAL(10, 2) NOT NULL DEFAULT 999.00,
+    status TEXT DEFAULT 'pending' CHECK (status IN ('pending', 'paid', 'failed')),
+    trade_no TEXT,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    paid_at TIMESTAMP WITH TIME ZONE
+);
+
+CREATE INDEX IF NOT EXISTS idx_orders_user_id ON orders(user_id);
+CREATE INDEX IF NOT EXISTS idx_orders_out_trade_no ON orders(out_trade_no);