refactor: expose state flows via asStateFlow

Drops the explicit getters and an unused import, and lets an emptyList
type argument be inferred.

app/src/main/java/com/example/research/data/repository/LocalDictionaryRepository.kt

@@ -27,9 +27,9 @@ import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.ensureActive
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.launch
 import kotlinx.coroutines.supervisorScope
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.Semaphore
@@ -95,12 +95,10 @@ class LocalDictionaryRepository(
     override val coroutineContext = Job() + ioDispatcher
 
     private val mutableDictionaries = MutableStateFlow<List<Dictionary>>(emptyList())
-    val dictionaries: StateFlow<List<Dictionary>>
-        get() = mutableDictionaries
+    val dictionaries: StateFlow<List<Dictionary>> = mutableDictionaries.asStateFlow()
 
     private val mutableIndexingProgress = MutableStateFlow(IndexingProgress())
-    val indexingProgress: StateFlow<IndexingProgress>
-        get() = mutableIndexingProgress
+    val indexingProgress: StateFlow<IndexingProgress> = mutableIndexingProgress.asStateFlow()
 
     private val indexingMutex = Mutex()
     private val indexingSemaphore = Semaphore(1)
@@ -489,7 +487,7 @@ class LocalDictionaryRepository(
                 if (dictFile.exists() && !dictFile.delete()) {
                     return@withContext Pair(
                         "Failed to delete dictionary file: ${dictFile.absolutePath}",
-                        emptyList<String>(),
+                        emptyList(),
                     )
                 }