[loop-cycle-53] refactor: break circular imports between packages (#164) (#193)

tests/dashboard/test_chat_persistence.py

@@ -1,6 +1,7 @@
 """Tests for SQLite-backed chat persistence (issue #46)."""
 
 from dashboard.store import Message, MessageLog
+import infrastructure.chat_store as _chat_store
 
 
 def test_persistence_across_instances(tmp_path):
@@ -24,10 +25,8 @@ def test_persistence_across_instances(tmp_path):
 
 def test_retention_policy(tmp_path):
     """Oldest messages are pruned when count exceeds MAX_MESSAGES."""
-    import dashboard.store as store_mod
-
-    original_max = store_mod.MAX_MESSAGES
-    store_mod.MAX_MESSAGES = 5  # Small limit for testing
+    original_max = _chat_store.MAX_MESSAGES
+    _chat_store.MAX_MESSAGES = 5  # Small limit for testing
 
     try:
         db = tmp_path / "chat.db"
@@ -42,7 +41,7 @@ def test_retention_policy(tmp_path):
         assert msgs[-1].content == "msg-7"
         log.close()
     finally:
-        store_mod.MAX_MESSAGES = original_max
+        _chat_store.MAX_MESSAGES = original_max
 
 
 def test_clear_removes_all(tmp_path):