feat(attachments): 新增附件管理页面

config/urls.py

@@ -2,10 +2,11 @@ from django.contrib import admin
 from django.contrib.auth.views import LoginView, LogoutView, PasswordChangeView
 from django.urls import include, path
 
-from review_agent.views import stream_chat, workspace
+from review_agent.views import attachment_manager, stream_chat, workspace
 
 urlpatterns = [
     path("", workspace, name="home"),
+    path("attachments/", attachment_manager, name="attachment_manager"),
     path("", include("review_agent.urls")),
     path("chat/stream/", stream_chat, name="chat_stream"),
     path(