Session fixes: auth working, frontend files created, running locally

- Fixed circular imports in API files
- Created missing frontend lib files (api.ts, socket.ts, types.ts)
- Fixed register endpoint to return token instead of user
- Updated Anthropic client version
- Backend running locally on port 8000
- Frontend running on port 3000
- Authentication working
- Still need: channel response fix, WebSocket auth fix

backend/api/auth.py

@@ -78,7 +78,7 @@ async def get_current_user(
     
     return user
 
-@router.post("/register", response_model=UserResponse)
+@router.post("/register", response_model=Token)
 async def register(user_data: UserRegister, db: Session = Depends(get_db)):
     """Register a new user"""
     
@@ -102,6 +102,10 @@ async def register(user_data: UserRegister, db: Session = Depends(get_db)):
     db.commit()
     db.refresh(user)
     
+    # Create access token
+    access_token = create_access_token(data={"sub": user.email})
+    return {"access_token": access_token, "token_type": "bearer"}
+
     return user
 
 @router.post("/login", response_model=Token)