refactor: enforce unique constraints on account and account_category names; update foreign key actions

src-tauri/src/db/entities/account.rs

@@ -9,6 +9,7 @@ use serde::{Deserialize, Serialize};
 pub struct Model {
     #[sea_orm(primary_key)]
     pub id: i64,
+    #[sea_orm(unique)]
     pub name: String,
     pub account_category_id: i64,
     pub created_at: String,
@@ -21,7 +22,7 @@ pub enum Relation {
         belongs_to = "super::account_category::Entity",
         from = "Column::AccountCategoryId",
         to = "super::account_category::Column::Id",
-        on_update = "NoAction",
+        on_update = "Restrict",
         on_delete = "NoAction"
     )]
     AccountCategory,

src-tauri/src/db/entities/account_category.rs

@@ -9,6 +9,7 @@ use serde::{Deserialize, Serialize};
 pub struct Model {
     #[sea_orm(primary_key)]
     pub id: i64,
+    #[sea_orm(unique)]
     pub name: String,
     pub account_type: String,
     pub created_at: String,