feat: 基础框架搭建完毕

internal/model/cash_entry.go

@@ -0,0 +1,19 @@
+package model
+
+import "time"
+
+// CashEntry amounts are integer CNY cents; no floating-point accounting.
+type CashEntry struct {
+	ID          string    `db:"id"`
+	AccountID   string    `db:"account_id"`
+	EntryType   string    `db:"entry_type"`
+	AmountMinor int64     `db:"amount_minor"`
+	CreatedAt   time.Time `db:"created_at"`
+}
+
+func (CashEntry) TableName() string { return "veyra_cash_entry" }
+
+type AccountSummary struct {
+	Account
+	CashBalance *string `json:"cash_balance"`
+}