fix(core): correct PBKDF2HMAC import and session management

- Fix import name from PBKDF2 to PBKDF2HMAC (correct cryptography API)
- Fix SQLAlchemy session detachment issue in list_projects()
- Eagerly load relationships to prevent lazy load errors

Tested on macOS - all functionality working correctly

Author: GreenHacker420

src/core/storage.py

@@ -86,7 +86,11 @@ def list_projects(self) -> List[Project]:
         """
         session = self.db_manager.get_session()
         try:
-            return session.query(Project).order_by(Project.name).all()
+            projects = session.query(Project).order_by(Project.name).all()
+            # Eagerly load env_vars to avoid detached instance issues
+            for project in projects:
+                _ = len(project.env_vars)  # Force load
+            return projects
         finally:
             session.close()
 

src/crypto/encryption.py

@@ -11,7 +11,7 @@
 
 from cryptography.fernet import Fernet, InvalidToken
 from cryptography.hazmat.primitives import hashes
-from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2
+from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
 
 
 class EncryptionManager:
@@ -45,7 +45,7 @@ def _derive_key(self, password: str, salt: bytes) -> bytes:
         Returns:
             A base64-encoded 32-byte key suitable for Fernet
         """
-        kdf = PBKDF2(
+        kdf = PBKDF2HMAC(
             algorithm=hashes.SHA256(),
             length=32,
             salt=salt,