Refactor recipe editing logic to use User's method for permission check and update template accordingly

backend/src/data/model.rs

@@ -16,6 +16,12 @@ pub struct User {
     pub is_admin: bool,
 }
 
+impl User {
+    pub fn can_edit_recipe(&self, recipe: &Recipe) -> bool {
+        self.is_admin || recipe.user_id == self.id
+    }
+}
+
 #[derive(Debug, FromRow)]
 pub struct UserLoginInfo {
     pub last_login_datetime: DateTime<Utc>,
@@ -45,10 +51,6 @@ pub struct Recipe {
     pub groups: Vec<Group>,
 }
 
-pub fn can_user_edit_recipe(user: &User, recipe: &Recipe) -> bool {
-    user.is_admin || recipe.user_id == user.id
-}
-
 #[derive(Debug, FromRow)]
 pub struct Group {
     pub id: i64,