refactor: remove manual refresh and search controls

backend/main.py

@@ -1027,7 +1027,6 @@ async def create_task(
 
 @app.get("/api/v1/tasks", response_model=TaskPage)
 async def list_tasks(
-    q: str | None = None,
     list_id: UUID | None = None,
     completed: bool | None = None,
     due_from: datetime | None = None,
@@ -1072,18 +1071,6 @@ async def list_tasks(
             query = query.where(Task.completed_at >= completed_from)
         if completed_to is not None:
             query = query.where(Task.completed_at < completed_to)
-    if q:
-        pattern = f"%{q}%"
-        list_match = exists(
-            select(TaskList.id).where(
-                TaskList.id == Task.list_id,
-                TaskList.user_id == user.id,
-                TaskList.name.ilike(pattern),
-            )
-        )
-        query = query.where(
-            or_(Task.title.ilike(pattern), Task.description.ilike(pattern), list_match)
-        )
     total = await db.scalar(select(func.count()).select_from(query.order_by(None).subquery())) or 0
     ordering = _task_ordering()
     if page is not None: