feat: Introduce Nullable type for optional fields and update user DTOs accordingly

backend/scripts/fix_tygo.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+const (
+	dtoFilePath     = "../frontend/src/types/dto.ts"
+	importStatement = `import { Nullable } from "./nullable";`
+)
+
+func main() {
+	// Run Tygo first
+	fmt.Println("🔄 Running tygo...")
+	if err := runTygo(); err != nil {
+		fmt.Println("❌ Error running tygo:", err)
+		os.Exit(1)
+	}
+
+	// Read dto.ts file
+	content, err := os.ReadFile(dtoFilePath)
+	if err != nil {
+		fmt.Println("❌ Could not read dto.ts:", err)
+		os.Exit(1)
+	}
+
+	// Convert to string
+	dtoContent := string(content)
+
+	// Check if import already exists
+	if strings.Contains(dtoContent, importStatement) {
+		fmt.Println("ℹ️ Import already exists in dto.ts, skipping.")
+		return
+	}
+
+	// Add import statement at the beginning
+	newContent := importStatement + "\n" + dtoContent
+	if err := os.WriteFile(dtoFilePath, []byte(newContent), 0644); err != nil {
+		fmt.Println("❌ Error writing dto.ts:", err)
+		os.Exit(1)
+	}
+
+	fmt.Println("✅ Successfully added Nullable<T> import to dto.ts")
+}
+
+// Runs Tygo command
+func runTygo() error {
+	cmd := "tygo"
+	output, err := exec.Command(cmd, "generate").CombinedOutput()
+	if err != nil {
+		fmt.Println("Tygo output:", string(output))
+		return err
+	}
+	if len(output) > 0 {
+		fmt.Println("Tygo output:", string(output))
+		return nil
+	}
+	return nil
+}