Reset ViewModels on logout/account switch

This commit introduces a `ResetModel()` function to `AgentViewModel` and `MineAgentViewModel` to clear their state.

This function is now called in `ResourceCleanupManager` and `AppState` during logout or when switching accounts to ensure that data from the previous session is not retained.

Additionally, the search and group name input fields in `CreateGroupChatScreen` are now single-line.

app/src/main/java/com/aiosman/ravenow/AppState.kt

@@ -25,6 +25,8 @@ import com.aiosman.ravenow.ui.index.tabs.moment.tabs.timeline.TimelineMomentView
 import com.aiosman.ravenow.ui.index.tabs.profile.MyProfileViewModel
 import com.aiosman.ravenow.ui.index.tabs.search.DiscoverViewModel
 import com.aiosman.ravenow.ui.index.tabs.search.SearchViewModel
+import com.aiosman.ravenow.ui.index.tabs.ai.AgentViewModel
+import com.aiosman.ravenow.ui.index.tabs.ai.tabs.mine.MineAgentViewModel
 import com.aiosman.ravenow.ui.like.LikeNoticeViewModel
 import com.aiosman.ravenow.utils.Utils
 import com.tencent.imsdk.v2.V2TIMCallback
@@ -212,6 +214,9 @@ object AppState {
         FollowerNoticeViewModel.ResetModel()
         // 重置关注通知页面
         IndexViewModel.ResetModel()
+        // 重置AI Agent相关页面
+        AgentViewModel.ResetModel()
+        MineAgentViewModel.ResetModel()
         UserId = null
 
         // 清除游客状态