♻️ 大幅重构，拆分模块，增加一些MCP相关限制

tests/test_persistence.py

@@ -0,0 +1,34 @@
+# ruff: noqa: I001
+import tempfile
+from pathlib import Path
+import unittest
+
+import tests.bootstrap  # noqa: F401
+from nonebot_plugin_llmchat.config import PresetConfig, ScopedConfig
+from nonebot_plugin_llmchat.persistence import StatePersistence
+from nonebot_plugin_llmchat.state import StateStore
+
+
+class PersistenceTests(unittest.IsolatedAsyncioTestCase):
+    async def test_private_state_loads_even_when_group_file_is_missing(self):
+        preset = PresetConfig(name="test", api_base="x", api_key="x", model_name="x")
+        config = ScopedConfig(
+            api_presets=[preset],
+            default_preset="test",
+            enable_private_chat=True,
+            private_chat_preset="test",
+        )
+        with tempfile.TemporaryDirectory() as directory:
+            group_file = Path(directory) / "groups.json"
+            private_file = Path(directory) / "private.json"
+            source = StateStore(config)
+            source.private_states[42].prompt = "remember me"
+            persistence = StatePersistence(config, source, group_file, private_file)
+            await persistence.save()
+            group_file.unlink()
+
+            restored = StateStore(config)
+            await StatePersistence(config, restored, group_file, private_file).load()
+
+            assert restored.private_states[42].prompt == "remember me"
+            assert not group_file.exists()