feat: complete API-driven projects with infrastructure and business acceptance

examples/userService/internal/model/user.go

@@ -0,0 +1,25 @@
+package model
+
+import "time"
+
+// User is the business entity; it has no dependency on HTTP or a database driver.
+type User struct {
+	ID        int64     `json:"id"`
+	Name      string    `json:"name"`
+	Email     string    `json:"email"`
+	CreatedAt time.Time `json:"createdAt"`
+	UpdatedAt time.Time `json:"updatedAt"`
+}
+
+// UserInput is shared by creation and full replacement (PUT).
+type UserInput struct {
+	Name  string
+	Email string
+}
+
+type UserPage struct {
+	Items    []User `json:"items"`
+	Total    int    `json:"total"`
+	Page     int    `json:"page"`
+	PageSize int    `json:"pageSize"`
+}