chore: 清理敏感与开发文档，仅同步代码

- 永久忽略并从仓库移除 开发文档/
- 移除并忽略 .env 与小程序私有配置
- 同步小程序/管理端/API与脚本改动

Made-with: Cursor

soul-api/scripts/add-balance-tables.sql

@@ -0,0 +1,28 @@
+-- 余额相关表（新版迁移）
+-- 执行：mysql -u user -p database < soul-api/scripts/add-balance-tables.sql
+
+-- user_balances
+CREATE TABLE IF NOT EXISTS user_balances (
+  user_id VARCHAR(50) PRIMARY KEY,
+  balance DECIMAL(10,2) DEFAULT 0,
+  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- balance_transactions
+CREATE TABLE IF NOT EXISTS balance_transactions (
+  id VARCHAR(50) PRIMARY KEY,
+  user_id VARCHAR(50) NOT NULL,
+  type VARCHAR(20) NOT NULL,
+  amount DECIMAL(10,2) NOT NULL,
+  order_id VARCHAR(50) DEFAULT NULL,
+  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+  INDEX idx_user_created (user_id, created_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- orders 增加 payment_method
+SET @col_exists = (SELECT COUNT(*) FROM information_schema.COLUMNS
+  WHERE table_schema = DATABASE() AND table_name = 'orders' AND column_name = 'payment_method');
+SET @sql = IF(@col_exists = 0, 'ALTER TABLE orders ADD COLUMN payment_method VARCHAR(20) DEFAULT NULL AFTER referrer_id', 'SELECT 1');
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;