init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

webapp-back/models/yt_swap.go

@@ -0,0 +1,24 @@
+package models
+
+import "time"
+
+// YTSwapRecord records each Swap event emitted by YT Vault contracts.
+// Swap(address account, address tokenIn, address tokenOut, uint256 amountIn, uint256 amountOut, uint256 feeBasisPoints)
+// account/tokenIn/tokenOut are indexed (topics), amountIn/amountOut are in data.
+type YTSwapRecord struct {
+	ID          uint      `gorm:"primaryKey;autoIncrement" json:"id"`
+	TxHash      string    `gorm:"size:66;uniqueIndex:uk_tx_log" json:"tx_hash"`
+	LogIndex    uint      `gorm:"uniqueIndex:uk_tx_log" json:"log_index"`
+	ChainID     int       `gorm:"index" json:"chain_id"`
+	BlockNumber uint64    `json:"block_number"`
+	BlockTime   time.Time `gorm:"index" json:"block_time"`
+	VaultAddr   string    `gorm:"size:42;index" json:"vault_addr"`
+	Account     string    `gorm:"size:42;index" json:"account"`
+	TokenIn     string    `gorm:"size:42" json:"token_in"`
+	TokenOut    string    `gorm:"size:42" json:"token_out"`
+	AmountIn    string    `gorm:"size:78" json:"amount_in"`  // wei string, base units
+	AmountOut   string    `gorm:"size:78" json:"amount_out"` // wei string, base units
+	CreatedAt   time.Time `json:"created_at"`
+}
+
+func (YTSwapRecord) TableName() string { return "yt_swap_records" }