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((

backend/src/models/user.rs

@@ -6,7 +6,7 @@ use wither::{
     IndexModel, IndexOptions, Model,
 };
 
-use crate::auth::password::PasswordService;
+use crate::auth::password::{PasswordService, verify_password};
 
 #[derive(Debug, Clone, Serialize, Deserialize, Model)]
 #[model(collection_name="users")]
@@ -57,14 +57,12 @@ impl User {
         password: String,
         recovery_phrase: Option<String>,
     ) -> Result<Self, anyhow::Error> {
-        let password_service = PasswordService::new();
-        
         // Hash the password
-        let password_hash = password_service.hash_password(&password)?;
+        let password_hash = PasswordService::hash_password(&password)?;
         
         // Hash the recovery phrase if provided
         let recovery_phrase_hash = if let Some(phrase) = recovery_phrase {
-            Some(password_service.hash_password(&phrase)?)
+            Some(PasswordService::hash_password(&phrase)?)
         } else {
             None
         };
@@ -89,8 +87,7 @@ impl User {
 
     /// Verify a password against the stored hash
     pub fn verify_password(&self, password: &str) -> Result<bool, anyhow::Error> {
-        let password_service = PasswordService::new();
-        password_service.verify_password(password, &self.password_hash)
+        verify_password(password, &self.password_hash)
     }
 
     /// Verify a recovery phrase against the stored hash
@@ -99,23 +96,20 @@ impl User {
             return Ok(false);
         }
         
-        let password_service = PasswordService::new();
         let hash = self.recovery_phrase_hash.as_ref().unwrap();
-        password_service.verify_password(phrase, hash)
+        verify_password(phrase, hash)
     }
 
     /// Update the password hash (increments token_version to invalidate all tokens)
     pub fn update_password(&mut self, new_password: String) -> Result<(), anyhow::Error> {
-        let password_service = PasswordService::new();
-        self.password_hash = password_service.hash_password(&new_password)?;
+        self.password_hash = PasswordService::hash_password(&new_password)?;
         self.token_version += 1;
         Ok(())
     }
 
     /// Set or update the recovery phrase
     pub fn set_recovery_phrase(&mut self, phrase: String) -> Result<(), anyhow::Error> {
-        let password_service = PasswordService::new();
-        self.recovery_phrase_hash = Some(password_service.hash_password(&phrase)?);
+        self.recovery_phrase_hash = Some(PasswordService::hash_password(&phrase)?);
         self.recovery_enabled = true;
         Ok(())
     }