refactor(settings): edit settings tab (#496)

* refactor(settings): remove current connection editor fields

Remove the active host, port, token fields, and clear token button from the main Connection tab, as profiles are now managed exclusively through the ProfileEditorDialog.

* feat(settings): migrate to full auto-save design and remove save button

Update settings change listeners (auto-reconnect, typing effect delay/toggle) to save state immediately to AuthManager. Remove the manual Save button from the scaffold's top bar and delete the redundant SaveIndicator.

* style(settings): clean up unused imports from settings UI cleanup

* fix(chat): resolve compose resource lint error and initial state test failure

Pre-resolve empty credentials string resource at the composable scope to fix LocalContext resource query lint error. Update testInitialStateAndConnection to use DISCONNECTED state to trigger connection and pass verification.

app/src/main/java/com/m57/hermescontrol/ui/chat/ChatScreen.kt

@@ -1667,7 +1667,7 @@ private fun ReloginDialog(
     onDismiss: () -> Unit,
     onRelogin: (String, String, (Boolean, String?) -> Unit) -> Unit,
 ) {
-    val context = LocalContext.current
+    val emptyCredentialsError = stringResource(R.string.chat_relogin_error_empty)
     val statusColors = LocalHermesStatusColors.current
     var username by rememberSaveable { mutableStateOf("") }
     var password by rememberSaveable { mutableStateOf("") }
@@ -1721,7 +1721,7 @@ private fun ReloginDialog(
                 enabled = !isLoading,
                 onClick = {
                     if (username.isBlank() || password.isBlank()) {
-                        errorMessage = context.getString(R.string.chat_relogin_error_empty)
+                        errorMessage = emptyCredentialsError
                         return@TextButton
                     }
                     isLoading = true