fix(backend): Fix compilation errors in password recovery

Fixed issues:
- PasswordService has no new() method, use static methods directly
- Updated User model to use PasswordService::hash_password() directly
- Updated handlers to import verify_password function
- Fixed all password hashing and verification calls

Compilation errors resolved:
- error[E0599]: PasswordService::new() not found
- error[E0277]: Handler trait not implemented for setup_recovery

Files modified:
- backend/src/models/user.rs
- backend/src/handlers/auth.rs
- backend/src/auth/jwt.rs

backend/src/handlers/auth.rs

@@ -10,6 +10,7 @@ use wither::bson::oid::ObjectId;
 
 use crate::{
     auth::jwt::{Claims, JwtService},
+    auth::password::verify_password,
     config::AppState,
     models::user::{User, UserRepository},
 };
@@ -221,7 +222,7 @@ pub async fn login(
     };
 
     // Verify password
-    match user.verify_password(&req.password) {
+    match verify_password(&req.password, &user.password_hash) {
         Ok(true) => {}
         Ok(false) => {
             return Err((
@@ -493,7 +494,7 @@ pub async fn setup_recovery(
     };
 
     // Verify current password
-    match user.verify_password(&req.current_password) {
+    match verify_password(&req.current_password, &user.password_hash) {
         Ok(true) => {}
         Ok(false) => {
             return Err((