Fix: Move DB operations to IO dispatcher in FeedbackDetailViewModel

The `loadFeedback`, `closeFeedback`, and `addReply` functions in `FeedbackDetailViewModel` were performing database operations on the main thread, which could lead to UI unresponsiveness (ANR).

This change wraps the repository calls within `viewModelScope.launch(Dispatchers.IO)` to ensure they are executed on a background thread. It also adds the necessary import for `Dispatchers`.

Author: google-labs-jules[bot]

app/src/main/java/org/ole/planet/myplanet/ui/feedback/FeedbackDetailViewModel.kt

@@ -5,6 +5,7 @@ import androidx.lifecycle.viewModelScope
 import com.google.gson.JsonObject
 import dagger.hilt.android.lifecycle.HiltViewModel
 import javax.inject.Inject
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharedFlow