Wire up query history: localStorage session persistence + sidebar UI

apps/ai-service/tests/test_live_datastores.py

@@ -24,6 +24,9 @@ CONVERSATION_MIGRATION = (
 FEEDBACK_MIGRATION = (
     Path(__file__).resolve().parents[1] / "migrations/004_rag_answer_feedback.sql"
 )
+HISTORY_MIGRATION = (
+    Path(__file__).resolve().parents[1] / "migrations/005_rag_trace_conversation.sql"
+)
 
 
 class _PlumbingEmbedder:
@@ -117,6 +120,7 @@ def test_real_postgres_migration_insert_and_read_back():
         "postgresql://duoc_thu:duoc_thu@localhost:5432/duoc_thu"
     )
     repository.migrate(MIGRATION)
+    repository.migrate(HISTORY_MIGRATION)
     trace_id = repository.save(
         query="Liều abacavir?",
         subject_scope="human",
@@ -145,6 +149,7 @@ def test_real_postgres_feedback_upserts_against_a_persisted_trace():
     )
     repository.migrate(MIGRATION)
     repository.migrate(FEEDBACK_MIGRATION)
+    repository.migrate(HISTORY_MIGRATION)
     trace_id = repository.save(
         query="Gút dùng thuốc gì?",
         subject_scope="human",
@@ -171,6 +176,43 @@ def test_real_postgres_feedback_upserts_against_a_persisted_trace():
     assert second == first
 
 
+def test_real_postgres_history_lists_by_conversation_most_recent_first():
+    """Feature-List #25 against a real Postgres: proves the migration,
+    save()'s new conversation_id column, and list_by_conversation's
+    filter+order all actually work together, not just against fakes."""
+    from adapters.postgres import PostgresTraceRepository
+
+    repository = PostgresTraceRepository(
+        "postgresql://duoc_thu:duoc_thu@localhost:5432/duoc_thu"
+    )
+    repository.migrate(MIGRATION)
+    repository.migrate(HISTORY_MIGRATION)
+    conversation_id = f"history-integration-{uuid.uuid4()}"
+
+    first_id = repository.save(
+        query="Chỉ định của metformin?", subject_scope="human", intent="fact_lookup",
+        decision="answerable", reason="grounded_evidence_available",
+        resolved_drug_id="metformin", citations=(), conversation_id=conversation_id,
+    )
+    second_id = repository.save(
+        query="Chống chỉ định của metformin?", subject_scope="human", intent="fact_lookup",
+        decision="answerable", reason="grounded_evidence_available",
+        resolved_drug_id="metformin", citations=(), conversation_id=conversation_id,
+    )
+    # A different conversation must never leak into this one's history.
+    repository.save(
+        query="Liều aspirin?", subject_scope="human", intent="fact_lookup",
+        decision="answerable", reason="grounded_evidence_available",
+        resolved_drug_id="aspirin", citations=(),
+        conversation_id=f"other-{uuid.uuid4()}",
+    )
+
+    rows = repository.list_by_conversation(conversation_id, limit=10)
+
+    assert [row.trace_id for row in rows] == [second_id, first_id]
+    assert all(row.conversation_id == conversation_id for row in rows)
+
+
 def test_real_postgres_conversation_store_round_trip():
     """F-08's durable conversation history against a real Postgres, not a
     fake — proves `append`/`recent` actually persist and window correctly,
@@ -264,6 +306,7 @@ def test_real_rag_agent_end_to_end_through_the_http_api():
         "postgresql://duoc_thu:duoc_thu@localhost:5432/duoc_thu"
     )
     traces.migrate(MIGRATION)
+    traces.migrate(HISTORY_MIGRATION)
     try:
         qdrant.create_collection(
             collection_name=collection,
@@ -363,6 +406,7 @@ def test_api_round_trip_uses_qdrant_and_persists_postgres_trace():
         "postgresql://duoc_thu:duoc_thu@localhost:5432/duoc_thu"
     )
     traces.migrate(MIGRATION)
+    traces.migrate(HISTORY_MIGRATION)
     try:
         qdrant.create_collection(
             collection_name=collection,