feat: Add new translation keys and backward-compatible aliases for web source settings

tests/unit/test_i18n.py

@@ -58,3 +58,30 @@ class TestI18n:
         available = i18n.get_available_languages()
         assert "en" in available
         assert "fr" in available
+
+    def test_renamed_settings_keys_fall_back_to_legacy_aliases(self, tmp_path: Path):
+        """Renamed keys should resolve via alias mapping to existing translations."""
+        translations = tmp_path / "translations"
+        translations.mkdir(parents=True, exist_ok=True)
+
+        (translations / "en.json").write_text(
+            json.dumps(
+                {
+                    "settings.log_file.browse_btn": "Browse...",
+                }
+            ),
+            encoding="utf-8",
+        )
+        (translations / "de.json").write_text(
+            json.dumps(
+                {
+                    "settings.log_file.browse_btn": "Durchsuchen...",
+                }
+            ),
+            encoding="utf-8",
+        )
+
+        i18n._translator = i18n.Translator()  # type: ignore[attr-defined]
+        i18n.initialize("de", translations)
+
+        assert i18n.tr("settings.logging.browse_btn") == "Durchsuchen..."