diff --git a/.gitignore b/.gitignore
index ab2e8c3..641b8e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@ CLAUDE.md
 node_modules/
 dist/
 *.log
+
+Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..e92c4cb
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,14 @@
+[workspace]
+members = ["backend"]
+resolver = "2"
+
+[profile.release]
+opt-level = 3
+lto = "fat"
+codegen-units = 1
+strip = true
+panic = "abort"
+
+[profile.release.package."*"]
+opt-level = 3
+codegen-units = 16
diff --git a/backend/src/routes/auth.rs b/backend/src/routes/auth.rs
index ff74dec..8cc5e2e 100644
--- a/backend/src/routes/auth.rs
+++ b/backend/src/routes/auth.rs
@@ -1,5 +1,4 @@
 use axum::{
-    extract::State,
     http::StatusCode,
     Json,
 };
diff --git a/backend/src/routes/category.rs b/backend/src/routes/category.rs
index 2f3a192..686ac74 100644
--- a/backend/src/routes/category.rs
+++ b/backend/src/routes/category.rs
@@ -5,7 +5,6 @@ use axum::{
 };
 use sea_orm::{prelude::Decimal, DatabaseConnection};
 use serde::Deserialize;
-use serde_json::json;
 use utoipa::ToSchema;
 
 use crate::models::category::Model as CategoryModel;
diff --git a/backend/src/routes/expense.rs b/backend/src/routes/expense.rs
index 75421d0..7f6e11f 100644
--- a/backend/src/routes/expense.rs
+++ b/backend/src/routes/expense.rs
@@ -5,7 +5,6 @@ use axum::{
 };
 use sea_orm::{prelude::Decimal, DatabaseConnection};
 use serde::{Deserialize, Serialize};
-use serde_json::json;
 use utoipa::ToSchema;
 
 use crate::models::expense::Model as ExpenseModel;
diff --git a/backend/src/routes/family.rs b/backend/src/routes/family.rs
index 9ec7531..5c7fcfe 100644
--- a/backend/src/routes/family.rs
+++ b/backend/src/routes/family.rs
@@ -5,7 +5,6 @@ use axum::{
 };
 use sea_orm::DatabaseConnection;
 use serde::Deserialize;
-use serde_json::json;
 use utoipa::ToSchema;
 
 use crate::models::family::Model as FamilyModel;