fix(details): manage download job lifecycle and fix Korean locale resources

This commit fixes a potential race condition in the download process by ensuring previous download jobs are cancelled before starting a new one. It also corrects the ISO language code for Korean resource files.

- **fix(details)**: Added job cancellation and cleanup logic to `InstallWithExternalApp` action in `DetailsViewModel`.
- **fix(details)**: Reset `currentAssetName` after successful installation prompt.
- **fix(i18n)**: Renamed Korean resource directory and file from `values-kr/strings-kr.xml` to `values-ko/strings-ko.xml` to follow standard ISO 639-1 language codes.

Author: rainxchzed

…omposeResources/values-kr/strings-kr.xml …omposeResources/values-ko/strings-ko.xmlcore/presentation/src/commonMain/composeResources/values-kr/strings-kr.xml renamed to core/presentation/src/commonMain/composeResources/values-ko/strings-ko.xml core/presentation/src/commonMain/composeResources/values-kr/strings-kr.xml renamed to core/presentation/src/commonMain/composeResources/values-ko/strings-ko.xml

@@ -778,7 +778,8 @@ class DetailsViewModel(
             }
 
             DetailsAction.InstallWithExternalApp -> {
-                viewModelScope.launch {
+                currentDownloadJob?.cancel()
+                currentDownloadJob = viewModelScope.launch {
                     try {
                         val primary = _state.value.primaryAsset
                         val release = _state.value.selectedRelease
@@ -849,8 +850,11 @@ class DetailsViewModel(
                                 )
                             }
                         }
+                    } finally {
+                        currentDownloadJob = null
                     }
                 }
+
                 _state.update {
                     it.copy(isInstallDropdownExpanded = false)
                 }
@@ -956,6 +960,7 @@ class DetailsViewModel(
                         showExternalInstallerPrompt = true,
                         pendingInstallFilePath = filePath
                     )
+                    currentAssetName = null
                     appendLog(
                         assetName = assetName,
                         size = sizeBytes,