elkay: lesson.py and teacher link

phase/Student_view/teacherlink.py

@@ -218,15 +218,12 @@ def show_code():
                             lesson_id = int(r.get("lesson_id"))
                             assignment_id = int(r.get("assignment_id"))
 
-                            # 1) Tell backend this assignment has started
                             try:
                                 _mark_assignment_started(student_id, assignment_id)
-                                # 2) Nudge a first position so the bar moves from 0%
                                 _set_assignment_progress(student_id, assignment_id, current_pos=1, progress=0.05)
                             except Exception as e:
                                 st.warning(f"Could not mark as started yet. Continuing anyway. {e}")
 
-                            # 3) Navigate
                             st.session_state.selected_lesson = lesson_id
                             st.session_state.selected_assignment = assignment_id
                             st.session_state.lesson_route = {
@@ -234,13 +231,6 @@ def show_code():
                                 "lesson_id": lesson_id,
                                 "assignment_id": assignment_id,
                             }
-
-                            # Optional: clear any cached data so the updated status shows next render
-                            try:
-                                st.cache_data.clear()
-                            except Exception:
-                                pass
-
                             st.session_state.current_page = "Lessons"
                             st.rerun()
                     with c2: