fix(assistant): resolve LocalContext resource query in LaunchedEffect

Extract string resource retrieval outside LaunchedEffect to ensure
proper recomposition on configuration changes. This resolves the LocalContextGetResourceValueCall lint warning and prevents stale snackbar messages when configuration changes occur (e.g., language switches, dark mode toggles).

The snackbar message string is now computed in the composable body where LocalContext.current changes trigger recomposition, ensuring
the LaunchedEffect always receives up-to-date string values.

Fixes lint error: "Querying resource values using LocalContext.current"

Signed-off-by: Josh <josh.t.richards@gmail.com>

Author: joshtrichards

app/src/main/java/com/nextcloud/client/assistant/translate/TranslationScreen.kt

@@ -67,16 +67,17 @@ fun TranslationScreen(viewModel: TranslationViewModel, assistantViewModel: Assis
     val context = LocalContext.current
     val state by viewModel.screenState.collectAsState()
     val messageId by viewModel.snackbarMessageId.collectAsState()
+    val snackbarMessage = messageId?.let { context.getString(it) }
     val snackbarHostState = remember { SnackbarHostState() }
 
     BackHandler {
         assistantViewModel.onTranslationScreenDismissed()
         assistantViewModel.updateScreenState(AssistantScreenState.TaskContent)
     }
 
-    LaunchedEffect(messageId) {
-        messageId?.let {
-            snackbarHostState.showSnackbar(context.getString(it))
+    LaunchedEffect(snackbarMessage) {
+        snackbarMessage?.let {
+            snackbarHostState.showSnackbar(it)
             viewModel.updateSnackbarMessage(null)
         }
     }