Merge remote-tracking branch 'origin/lotus' into fix/translate-unavailable-copy

# Conflicts:
#	src/app/utils/translation/langUtils.ts

src/app/utils/translation/langUtils.ts

@@ -95,3 +95,9 @@ export const translationUnavailableText = (desktopApp: boolean): string =>
   desktopApp
     ? 'On-device translation isn’t available in this version of the desktop app. It works in Chrome or Edge 138+ on a computer.'
     : 'On-device translation isn’t available in this browser. Use Chrome or Edge 138+ on a computer.';
+
+/** Pure: why a manual Translate did nothing (#287). */
+export const translateSkipMessage = (from: string | undefined, targetLang: string): string =>
+  from
+    ? `This message is already in ${languageName(targetLang) || targetLang}.`
+    : "Couldn't tell what language this message is in, so it wasn't translated.";

src/app/utils/translation/translateSkip.test.ts

@@ -0,0 +1,8 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { translateSkipMessage } from './langUtils';
+
+test('translateSkipMessage explains a Translate that did nothing (#287)', () => {
+  assert.equal(translateSkipMessage('en', 'en'), 'This message is already in English.');
+  assert.match(translateSkipMessage(undefined, 'en'), /^Couldn't tell what language/);
+});