Fix some IO related crashes (#1008)

## Description
- Catch network exceptions when querying to populate the nav drawer
- Perform screensaver work on IO thread
- Fix possible crash if screensaver service runs while regular activity
is destroyed
- Fix genre images & backdrop images not loading

This PR also adds an Jellyfin SDK `ApiClient` wrapper to push all
network calls onto the IO thread. And tries to use a more strict
network-on-main policy for debug builds.

### Related issues
Fixes #994
Fixes #1001
Should fix #1003

### Testing
Emulator with simulated exception throws

## Screenshots
N/A

## AI or LLM usage
None

app/src/main/java/com/github/damontecres/wholphin/ui/Extensions.kt

@@ -45,7 +45,6 @@ import org.jellyfin.sdk.api.client.ApiClient
 import org.jellyfin.sdk.api.client.Response
 import org.jellyfin.sdk.model.api.BaseItemDto
 import org.jellyfin.sdk.model.api.BaseItemDtoQueryResult
-import org.jellyfin.sdk.model.api.ImageType
 import org.jellyfin.sdk.model.extensions.ticks
 import timber.log.Timber
 import java.util.UUID
@@ -429,12 +428,6 @@ fun Response<BaseItemDtoQueryResult>.toBaseItems(
     useSeriesForPrimary: Boolean,
 ) = this.content.items.map { BaseItem.from(it, api, useSeriesForPrimary) }
 
-@Composable
-fun rememberBackDropImage(item: BaseItem): String? {
-    val imageUrlService = LocalImageUrlService.current
-    return remember(item) { imageUrlService.getItemImageUrl(item, ImageType.BACKDROP) }
-}
-
 /**
  * Check if this, coalescing nulls to zero, is greater than that
  */

app/src/main/java/com/github/damontecres/wholphin/ui/components/GenreCardGrid.kt

@@ -209,6 +209,7 @@ suspend fun getGenreImageMap(
                                 imageType = ImageType.BACKDROP,
                                 imageTags = item.imageTags.orEmpty(),
                                 fillWidth = cardWidthPx,
+                                backdropTags = item.backdropImageTags.orEmpty(),
                             )
                     }
                 }