Fix: Prevent AuthManager state pollution on connection verification (#348)

* Fix: Prevent AuthManager state pollution on connection verification

Modified `ConnectViewModel.connect()` to construct a temporary OkHttpClient and Retrofit builder, isolated from the global `ApiClient` state. The connection verification is executed using this temporary service. Only upon a successful HTTP response does the system persist the configured `host`, `port`, and `token` to the global `AuthManager` and triggers an `ApiClient.rebuild()`. This resolves the issue where a failed connection attempt would overwrite active and verified profiles. Extracted `createTempService` factory to `ApiClient` for robustness and clean tests.

Fixes #260

* Fix: Prevent AuthManager state pollution on connection verification

Modified `ConnectViewModel.connect()` to construct a temporary OkHttpClient and Retrofit builder, isolated from the global `ApiClient` state. The connection verification is executed using this temporary service. Only upon a successful HTTP response does the system persist the configured `host`, `port`, and `token` to the global `AuthManager` and triggers an `ApiClient.rebuild()`. This resolves the issue where a failed connection attempt would overwrite active and verified profiles. Extracted `createTempService` factory to `ApiClient` for robustness and clean tests.

Fixes #260

---------

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/ui/achievements/AchievementsScreen.kt

@@ -65,16 +65,17 @@ fun AchievementsScreen(
         onOpenDrawer = onOpenDrawer,
         isRefreshing = state.isLoading,
         onRefresh = { viewModel.loadAchievements() },
-    ) {
+    ) { paddingValues ->
         when {
             state.isLoading && state.achievements.isEmpty() -> {
-                LoadingState()
+                LoadingState(modifier = Modifier.padding(paddingValues))
             }
 
             state.errorMessage != null && state.achievements.isEmpty() -> {
                 ErrorState(
                     message = state.errorMessage ?: "",
                     onRetry = { viewModel.loadAchievements() },
+                    modifier = Modifier.padding(paddingValues),
                 )
             }
 
@@ -83,12 +84,13 @@ fun AchievementsScreen(
                     title = stringResource(R.string.achievements_empty_title),
                     subtitle = stringResource(R.string.achievements_empty_desc),
                     icon = Icons.Filled.Refresh,
+                    modifier = Modifier.padding(paddingValues),
                 )
             }
 
             else -> {
                 LazyColumn(
-                    modifier = Modifier.fillMaxSize(),
+                    modifier = Modifier.fillMaxSize().padding(paddingValues),
                     contentPadding = PaddingValues(16.dp),
                     verticalArrangement = Arrangement.spacedBy(12.dp),
                 ) {
@@ -99,7 +101,7 @@ fun AchievementsScreen(
                             placeholder = "Search achievements...",
                         )
                     }
-                    items(filteredAchievements, key = { it.id }) { achievement ->
+                    items(filteredAchievements) { achievement ->
                         val pct = achievement.progress_pct?.toFloat()?.div(100f) ?: 0f
 
                         Card(