Update teacher_panel.py

teacher_panel.py

@@ -1,5 +1,7 @@
 # teacher_panel.py
-from typing import List, Tuple, Any
+from typing import List, Tuple
+
+import gradio as gr  # ⬅️ needed for gr.SelectData type
 
 import qa_store
 from qa_store import normalize_question
@@ -128,20 +130,34 @@ def teacher_delete_current(
 
 
 def teacher_on_table_select(
-    evt: Any, table: List[List[str]]
+    table: List[List[str]], evt: gr.SelectData
 ) -> Tuple[str, str, str, str]:
     """
     When teacher clicks a row in the Q&A table, load Q/A into textboxes.
+
+    Gradio passes:
+      - table: current Dataframe value (list of rows)
+      - evt:   gr.SelectData, where evt.index = (row, col)
     """
     try:
-        # evt.index can be int or [row, col]
+        if evt is None or evt.index is None:
+            raise ValueError("Empty select event")
+
+        # evt.index can be int or (row, col)
         idx = evt.index[0] if isinstance(evt.index, (list, tuple)) else evt.index
-        row = table[idx]
-        current_id = str(row[0])
-        question = str(row[1])
-        answer = str(row[2])
+
+        if idx is None or idx < 0 or idx >= len(table):
+            raise IndexError(f"Row index {idx} out of range")
+
+        row = table[idx]  # row should be [id, question, answer]
+
+        current_id = str(row[0]) if len(row) > 0 else ""
+        question = str(row[1]) if len(row) > 1 else ""
+        answer = str(row[2]) if len(row) > 2 else ""
+
         msg = f"✏️ ເລືອກ Q&A ID {current_id} ສໍາລັບແກ້ໄຂ."
-    except Exception:  # noqa: BLE001
+    except Exception as e:  # noqa: BLE001
+        print(f"[WARN] teacher_on_table_select error: {e}")
         current_id = ""
         question = ""
         answer = ""