Add post-diarization speaker review workflow

src/mka/ui/streamlit_app.py

@@ -554,7 +554,15 @@ def _render_result() -> None:
             st.caption("Intermediate artifacts and run metadata were preserved here.")
         return
 
-    st.success("Processing completed. Review the generated protocol before use.")
+    awaiting_review = getattr(outcome, "awaiting_speaker_review", False)
+    if awaiting_review:
+        count = getattr(outcome, "detected_speaker_count", None)
+        detected = f"{count} speakers detected" if count is not None else "speakers detected"
+        st.info(
+            f"Diarization complete — {detected}. Assign speakers if desired, then generate the protocol."
+        )
+    else:
+        st.success("Processing completed. Review the generated protocol before use.")
     st.caption(f"Run artifacts: {outcome.run_dir}")
     if outcome.speaker_attribution_available is False:
         st.warning(
@@ -563,17 +571,18 @@ def _render_result() -> None:
         )
     if message := st.session_state.pop("speaker_mapping_message", None):
         st.success(message)
-    with st.expander("Original generated protocol", expanded=False):
-        st.markdown(outcome.original_protocol or "")
-    edited = st.text_area(
-        "Editable protocol",
-        key="edited_protocol",
-        height=500,
-        help="The original protocol.md remains unchanged.",
-    )
-    if st.button("Save edited protocol", type="primary"):
-        path = MeetingProcessingService.save_edited_protocol(outcome.run_dir, edited)
-        st.success(f"Saved edited protocol to {path}")
+    if not awaiting_review:
+        with st.expander("Original generated protocol", expanded=False):
+            st.markdown(outcome.original_protocol or "")
+        edited = st.text_area(
+            "Editable protocol",
+            key="edited_protocol",
+            height=500,
+            help="The original protocol.md remains unchanged.",
+        )
+        if st.button("Save edited protocol", type="primary"):
+            path = MeetingProcessingService.save_edited_protocol(outcome.run_dir, edited)
+            st.success(f"Saved edited protocol to {path}")
 
     try:
         service = MeetingProcessingService(AppSettings.from_environment(), MeetingLabGateway())
@@ -590,7 +599,7 @@ def _render_result() -> None:
     if duplicate_assignments:
         st.error("Each participant can be assigned to only one detected speaker.")
     if st.button(
-        "Regenerate protocol with confirmed speakers",
+        "Generate protocol" if awaiting_review else "Regenerate protocol with confirmed speakers",
         disabled=duplicate_assignments,
         type="primary",
     ):
@@ -610,7 +619,7 @@ def _render_result() -> None:
                     performance_profile=selected_profile,
                 ),
                 states,
-                "Starting protocol regeneration",
+                "Starting protocol generation" if awaiting_review else "Starting protocol regeneration",
             )
         except (OSError, RuntimeError, ValueError) as exc:
             _remember_regeneration_timing(
@@ -618,13 +627,13 @@ def _render_result() -> None:
                 "Protocol regeneration failed",
                 service.timer.snapshot(),
             )
-            st.error(f"Protocol regeneration failed: {exc}")
+            st.error(f"Protocol generation failed: {exc}")
         else:
             _remember_regeneration_timing(states, message, timing)
             st.session_state.outcome = regenerated
             _queue_edited_protocol(regenerated.original_protocol or "")
             st.session_state.speaker_mapping_message = (
-                "Speaker mappings saved and protocol regenerated."
+                "Speaker mappings saved and protocol generated."
             )
             st.rerun()