Add reusable people list import and export

src/mka/ui/streamlit_app.py

@@ -18,6 +18,11 @@ from mka.application.meeting_service import (
     ProcessingOptions,
     stable_id,
 )
+from mka.application.people_yaml import (
+    PeopleYamlError,
+    export_people_yaml,
+    import_people_yaml,
+)
 from mka.integrations.meeting_lab import (
     MeetingLabGateway,
     MeetingLabUnavailableError,
@@ -48,9 +53,41 @@ def _initialize_state() -> None:
     st.session_state.setdefault("edited_protocol", "")
 
 
+def _people_to_rows(people: list[ParticipantInput]) -> list[dict[str, str]]:
+    """Create fresh widget rows while preserving reusable person IDs."""
+    return [
+        {
+            "row_id": uuid4().hex,
+            "participant_id": person.participant_id,
+            "display_name": person.display_name,
+            "role": person.role,
+            "organization": person.organization,
+            "attendance_status": person.attendance_status,
+        }
+        for person in people
+    ]
+
+
 def _render_participants() -> list[ParticipantInput]:
     st.subheader("People")
     st.caption("Record whether each relevant person attended or was only mentioned.")
+    imported_file = st.file_uploader(
+        "Import people",
+        type=["yaml", "yml"],
+        help="Replace the current People list from a versioned YAML export.",
+    )
+    if st.button("Import people list", disabled=imported_file is None):
+        try:
+            imported_people = import_people_yaml(imported_file.getvalue())
+        except PeopleYamlError as exc:
+            st.error(str(exc))
+        else:
+            st.session_state.participants = _people_to_rows(imported_people)
+            st.session_state.people_import_message = f"Imported {len(imported_people)} people."
+            st.rerun()
+    if message := st.session_state.pop("people_import_message", None):
+        st.success(message)
+
     rows = st.session_state.participants
     remove_index: int | None = None
     for index, row in enumerate(rows):
@@ -84,10 +121,11 @@ def _render_participants() -> list[ParticipantInput]:
     if remove_index is not None:
         rows.pop(remove_index)
         st.rerun()
-    if st.button("Add person"):
+    action_columns = st.columns(2)
+    if action_columns[0].button("Add person"):
         rows.append(_new_participant())
         st.rerun()
-    return [
+    people = [
         ParticipantInput(
             participant_id=row["participant_id"],
             display_name=row["display_name"],
@@ -97,6 +135,14 @@ def _render_participants() -> list[ParticipantInput]:
         )
         for row in rows
     ]
+    exported_yaml = export_people_yaml(people).encode("utf-8")
+    action_columns[1].download_button(
+        "Export people",
+        data=exported_yaml,
+        file_name="people.yaml",
+        mime="application/yaml",
+    )
+    return people
 
 
 def _progress_callback(