Fix Flashcards tab: replace deprecated st.experimental_rerun with st.rerun, fix dataframe display

requirements.txt

@@ -1,8 +1,8 @@
 ########################################
 # Streamlit Core
 ########################################
-streamlit==1.28.0
-tornado==6.3.3
+streamlit>=1.28.0
+tornado>=6.3.3
 
 ########################################
 # Audio Input / Output

src/app/main_app.py

@@ -257,7 +257,7 @@ def login_view():
             if authenticate_user(u, p):
                 st.session_state["user"] = u
                 st.session_state["prefs"] = get_user_prefs(u)
-                st.experimental_rerun()
+                st.rerun()
             else:
                 st.error("Invalid login.")
 
@@ -527,7 +527,7 @@ def conversation_tab(username: str):
         st.session_state["pending_transcript"] = ""
         st.session_state["speech_state"] = "idle"
         st.session_state["recorder_key"] += 1
-        st.experimental_rerun()
+        st.rerun()
 
     # ------------------------------------------
     # FIRST MESSAGE GREETING
@@ -637,7 +637,7 @@ def conversation_tab(username: str):
                     st.session_state["pending_transcript"] = txt.strip()
                     st.session_state["speech_state"] = "pending_speech"
                     st.session_state["recorder_key"] += 1
-                    st.experimental_rerun()
+                    st.rerun()
                 except Exception as e:
                     st.error(f"Audio decode/transcription error: {e}")
 
@@ -661,14 +661,14 @@ def conversation_tab(username: str):
                     st.session_state["speech_state"] = "idle"
                     st.session_state["pending_transcript"] = ""
                     st.session_state["recorder_key"] += 1
-                    st.experimental_rerun()
+                    st.rerun()
 
             with c2:
                 if st.button("Discard", key="discard_pending"):
                     st.session_state["speech_state"] = "idle"
                     st.session_state["pending_transcript"] = ""
                     st.session_state["recorder_key"] += 1
-                    st.experimental_rerun()
+                    st.rerun()
 
         # -------------------------------
         # TYPED TEXT INPUT
@@ -677,7 +677,7 @@ def conversation_tab(username: str):
         if typed.strip() and st.button("Send typed message"):
             handle_user_message(username, typed.strip())
             st.session_state["typed_input"] = ""
-            st.experimental_rerun()
+            st.rerun()
 
         st.markdown("</div>", unsafe_allow_html=True)
 
@@ -728,7 +728,7 @@ def conversation_tab(username: str):
 
                     if st.button(f"Delete {f.stem}", key=f"delete_{f.stem}"):
                         f.unlink()
-                        st.experimental_rerun()
+                        st.rerun()
 
 
 ###############################################################
@@ -855,7 +855,7 @@ def flashcards_tab(username: str):
     # Delete deck button
     if st.button("Delete deck"):
         deck_path.unlink()
-        st.experimental_rerun()
+        st.rerun()
 
     # ---------------------------------------------------------
     # Session state setup
@@ -919,7 +919,7 @@ def flashcards_tab(username: str):
             with c1:
                 if st.button("Flip", key=key + "flip"):
                     ss[key + "show_back"] = not show_back
-                    st.experimental_rerun()
+                    st.rerun()
             with c2:
                 if st.button("Shuffle deck", key=key + "shuf"):
                     random.shuffle(cards)
@@ -927,12 +927,12 @@ def flashcards_tab(username: str):
                     save_deck(deck_path, deck)
                     ss[key + "idx"] = 0
                     ss[key + "show_back"] = False
-                    st.experimental_rerun()
+                    st.rerun()
             with c3:
                 if st.button("Next →", key=key + "next"):
                     ss[key + "idx"] = (idx + 1) % len(cards)
                     ss[key + "show_back"] = False
-                    st.experimental_rerun()
+                    st.rerun()
 
             # DIFFICULTY GRADING (centered)
             st.markdown("### Rate this card")
@@ -955,7 +955,7 @@ def flashcards_tab(username: str):
                 save_deck(deck_path, deck)
                 ss[key + "idx"] = _choose_next_card_index(cards)
                 ss[key + "show_back"] = False
-                st.experimental_rerun()
+                st.rerun()
 
             with cA:
                 if st.button("🔥 Very Difficult", key=key+"g_vd"):
@@ -991,7 +991,7 @@ def flashcards_tab(username: str):
                     ss[key + "test_order"] = order
                     ss[key + "test_pos"] = 0
                     ss[key + "test_results"] = []
-                    st.experimental_rerun()
+                    st.rerun()
 
             else:
                 order = ss[key + "test_order"]
@@ -1013,7 +1013,7 @@ def flashcards_tab(username: str):
                         ss[key + "test_pos"] = 0
                         ss[key + "test_results"] = []
                         ss[key + "test_order"] = []
-                        st.experimental_rerun()
+                        st.rerun()
                     return
 
                 # Current question
@@ -1051,7 +1051,7 @@ def flashcards_tab(username: str):
                     })
                     ss[key + "test_results"] = results
                     ss[key + "test_pos"] = pos + 1
-                    st.experimental_rerun()
+                    st.rerun()
 
     # =======================================================
     # DECK AT A GLANCE (FULL WIDTH)
@@ -1059,17 +1059,21 @@ def flashcards_tab(username: str):
     st.markdown("---")
     st.subheader("Deck at a glance")
 
-    df_rows = []
-    for i, c in enumerate(cards, start=1):
-        df_rows.append({
-            "#": i,
-            "Front": c.get("front", ""),
-            "Back": c.get("back", ""),
-            "Score": c.get("score", 0),
-            "Reviews": c.get("reviews", 0),
-        })
-
-    st.dataframe(pd.DataFrame(df_rows), height=500, use_container_width=True)
+    if cards:
+        df_rows = []
+        for i, c in enumerate(cards, start=1):
+            df_rows.append({
+                "#": i,
+                "Front": c.get("front", ""),
+                "Back": c.get("back", ""),
+                "Score": c.get("score", 0),
+                "Reviews": c.get("reviews", 0),
+            })
+
+        df = pd.DataFrame(df_rows)
+        st.dataframe(df, height=min(500, len(cards) * 40 + 50), use_container_width=True, hide_index=True)
+    else:
+        st.info("No cards in this deck.")
 
 
 ###############################################################
@@ -1153,7 +1157,7 @@ def quiz_tab(username: str):
                 "correct": choice == q["answer"],
             }
             st.session_state["quiz_idx"] += 1
-            st.experimental_rerun()
+            st.rerun()
     else:
         ans = st.text_input("Your answer", key=f"fill_{idx}")
         if st.button("Submit", key=f"sub_{idx}"):
@@ -1162,7 +1166,7 @@ def quiz_tab(username: str):
                 "correct": ans.strip().lower() == q["answer"].lower(),
             }
             st.session_state["quiz_idx"] += 1
-            st.experimental_rerun()
+            st.rerun()
 
 
 ###############################################################
@@ -1180,47 +1184,35 @@ def main():
 
     if st.sidebar.button("Log out"):
         st.session_state.clear()
-        st.experimental_rerun()
+        st.rerun()
 
     # ---------- LOAD MODELS + PREFS ----------
     preload_models()
     sidebar_settings(username)
     ensure_default_decks(username)
 
-    # ---------- TAB PERSISTENCE ----------
-    if "active_tab" not in st.session_state:
-        st.session_state["active_tab"] = 0
-
+    # ---------- TABS ----------
     tab_labels = ["Dashboard", "Conversation", "OCR", "Flashcards", "Quiz", "Settings"]
     tabs = st.tabs(tab_labels)
 
     tab_dash, tab_conv, tab_ocr, tab_flash, tab_quiz, tab_settings = tabs
 
-    # restore active tab (required so Streamlit shows correct tab on rerun)
-    _ = tabs[st.session_state["active_tab"]]
-
     with tab_dash:
-        st.session_state["active_tab"] = 0
         dashboard_tab(username)
 
     with tab_conv:
-        st.session_state["active_tab"] = 1
         conversation_tab(username)
 
     with tab_ocr:
-        st.session_state["active_tab"] = 2
         ocr_tab(username)
 
     with tab_flash:
-        st.session_state["active_tab"] = 3
         flashcards_tab(username)
 
     with tab_quiz:
-        st.session_state["active_tab"] = 4
         quiz_tab(username)
 
     with tab_settings:
-        st.session_state["active_tab"] = 5
         settings_tab(username)