elkay: lesson.py and teacher link

phase/Student_view/teacherlink.py

@@ -216,24 +216,16 @@ def show_code():
                     with c1:
                         # pass lesson & assignment to the Lessons page
                         if st.button("▶️ Start Lesson", key=f"start_lesson_{r.get('assignment_id')}"):
-                            lesson_id = int(r.get("lesson_id"))
-                            assignment_id = int(r.get("assignment_id"))
-
-                            # Tell backend we started
-                            try:
-                                _mark_assignment_started(student_id, assignment_id)
-                                _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}")
-
-                            # Route intent
-                            st.session_state.selected_lesson = lesson_id
-                            st.session_state.selected_assignment = assignment_id
+                            st.session_state.selected_lesson = int(r.get("lesson_id"))          # keep for backward compat
+                            st.session_state.selected_assignment = int(r.get("assignment_id"))  # keep for backward compat
+
+                            # New explicit route hint. This is what fixes your navigation.
                             st.session_state.lesson_route = {
                                 "source": "teacher",
-                                "lesson_id": lesson_id,
-                                "assignment_id": assignment_id,
+                                "lesson_id": int(r.get("lesson_id")),
+                                "assignment_id": int(r.get("assignment_id") or 0),
                             }
+
                             st.session_state.current_page = "Lessons"
                             st.rerun()
                     with c2:

utils/api.py

@@ -318,14 +318,6 @@ def delete_lesson(lesson_id: int, teacher_id: int):
     d = _req("DELETE", f"/lessons/{lesson_id}", json={"teacher_id": teacher_id}).json()
     return bool(d.get("ok", True)), d.get("message", "")
 
-def mark_assignment_started(student_id: int, assignment_id: int):
-    return _req("POST", f"/assignments/{assignment_id}/start").json()
-
-def set_assignment_progress(student_id: int, assignment_id: int, current_pos: int, progress: float):
-    return _req("PATCH", f"/assignments/{assignment_id}/progress",
-                json={"current_pos": current_pos, "progress": progress}).json()
-
-
 # Quizzes
 def list_quizzes_by_teacher(teacher_id: int):
     return _json_or_raise(_req("GET", f"/teachers/{teacher_id}/quizzes"))
@@ -665,16 +657,4 @@ def tutor_explain(lesson_id: int, level_slug: str, wrong: list[dict]):
         "wrong": wrong
     }, timeout=60)
     r.raise_for_status()
-    return r.json()["feedback"]
-
-@app.post("/assignments/{assignment_id}/start")
-def start_assignment(assignment_id: int, student=Depends(auth_student)):
-    db.mark_assignment_started(student.id, assignment_id)
-    return {"ok": True}
-
-@app.patch("/assignments/{assignment_id}/progress")
-def update_progress(assignment_id: int, payload: dict, student=Depends(auth_student)):
-    db.set_assignment_progress(student.id, assignment_id,
-                               payload.get("current_pos", 0),
-                               payload.get("progress", 0.0))
-    return {"ok": True}
+    return r.json()["feedback"]