fix activity history extract activity id

Author: maxto024

src/apps/answers/flow_submission_progress.py

@@ -22,8 +22,12 @@ def __init__(self, session: AsyncSession, answer_session: AsyncSession):
 
     @staticmethod
     def _extract_activity_id(activity_history_id: str) -> str:
-        """Extract activity_id from activity_history_id format: {activity_id}_{version}."""
-        return activity_history_id.split("_")[0]
+        """Extract activity_id from activity_history_id format: {activity_id}_{version}.
+
+        Activity history ID format is: UUID (36 chars) + "_" + version
+        Example: "cf6b7fd3-203c-4d4a-b9fb-91ccae37146b_1.0.0"
+        """
+        return activity_history_id[:36]
 
     async def load(self, flow_history_id: str, submit_id) -> None:
         """Load flow structure and existing submissions for the submit id."""
@@ -33,7 +37,8 @@ async def load(self, flow_history_id: str, submit_id) -> None:
             return
 
         flow_history = flow_histories[0]
-        self._expected_counts = Counter(item.activity_id for item in flow_history.items)
+        # Extract UUID from activity_history_id format for counting
+        self._expected_counts = Counter(self._extract_activity_id(item.activity_id) for item in flow_history.items)
         self._expected_ids = set(self._expected_counts.keys())
         self._has_flow_history = True