fix import paths in app.py to reflect correct module structure

server/app.py

@@ -22,9 +22,9 @@ from fastapi import FastAPI, HTTPException, Query
 from pydantic import BaseModel
 
 from env.schemas import Action, ActionType, TaskInfo
-from tasks.task1 import Task1Environment
-from tasks.task2 import Task2Environment
-from tasks.task3 import Task3Environment
+from server.tasks.task1 import Task1Environment
+from server.tasks.task2 import Task2Environment
+from server.tasks.task3 import Task3Environment
 
 # ─────────────────────────────────────────────────────────────────────────────
 # App