refactor: packet-based IPC with core/ui separation

- All logic in core layer (BackendServer runs independently)
- Packet protocol: {id, type, body} for all communications
- UI simplified: just input→backend→display
- Config, history, tools all handled by core
- BackendServer can run standalone without UI

trulymem_entry.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python3
 import sys
-import os
 from pathlib import Path
 
 if getattr(sys, 'frozen', False):
@@ -8,37 +7,26 @@ if getattr(sys, 'frozen', False):
 else:
     application_path = Path(__file__).parent
 
+sys.path.insert(0, str(application_path))
+import os
 os.chdir(application_path)
 
-if str(application_path) not in sys.path:
-    sys.path.insert(0, str(application_path))
-
 from core import BackendServer
-from ui import GraphMemoryApp, AppConfig
+from ui import GraphMemoryApp
 
 
 def main():
     backend_server = BackendServer(db_path="graph_memory.db", use_embedded_db=True)
-    
-    try:
-        config = AppConfig.from_env()
-        backend_server.start(api_key=config.api_key, base_url=config.base_url)
-    except Exception as e:
-        print(f"后端启动失败: {e}")
+    backend_server.start(api_key="", base_url="https://api.deepseek.com")
     
     app = GraphMemoryApp(backend_server=backend_server)
     
     try:
         app.run()
     except KeyboardInterrupt:
-        print("\n应用已退出")
-    except Exception as e:
-        print(f"应用启动失败: {e}")
-        import traceback
-        traceback.print_exc()
+        print("\n退出")
     finally:
         backend_server.shutdown()
-        sys.exit(0)
 
 
 if __name__ == "__main__":