test: 5 final agents — fix 40+ failures, llm_analysis 80%+, git_plugin 90%+, routes 90-98%, services 98-100%, core 90-100%. Coverage: real 87%, target 95%+

backend/tests/core/test_core_config_manager.py

@@ -856,3 +856,44 @@ class TestDeleteEnvironment:
         assert mgr.config.settings.default_environment_id != "env1"
     # #endregion test_delete_updates_default_setting
 #endregion Test.Core.ConfigManager
+
+
+# #region TestGlobalSettingsValidators [C:2] [TYPE Module]
+# @BRIEF Direct tests for GlobalSettings field validators.
+import pytest
+
+
+class TestAppTimezoneValidator:
+    # #region test_valid_timezone [C:1] [TYPE Function]
+    def test_valid_timezone(self):
+        gs = GlobalSettings(app_timezone="Europe/Moscow")
+        assert gs.app_timezone == "Europe/Moscow"
+    # #endregion test_valid_timezone
+
+    # #region test_invalid_timezone [C:1] [TYPE Function]
+    def test_invalid_timezone(self):
+        with pytest.raises(ValueError, match="Invalid IANA timezone"):
+            GlobalSettings(app_timezone="Not/A/Timezone")
+    # #endregion test_invalid_timezone
+
+
+class TestAllowedLanguagesValidator:
+    # #region test_valid_languages [C:1] [TYPE Function]
+    def test_valid_languages(self):
+        gs = GlobalSettings(allowed_languages=["en", "fr", "de", "zh-CN", "pt-BR"])
+        assert "en" in gs.allowed_languages
+        assert "zh-CN" in gs.allowed_languages
+    # #endregion test_valid_languages
+
+    # #region test_empty_language_rejected [C:1] [TYPE Function]
+    def test_empty_language_rejected(self):
+        with pytest.raises(ValueError, match="Empty language code"):
+            GlobalSettings(allowed_languages=["en", "", "fr"])
+    # #endregion test_empty_language_rejected
+
+    # #region test_invalid_bcp47_rejected [C:1] [TYPE Function]
+    def test_invalid_bcp47_rejected(self):
+        with pytest.raises(ValueError, match="Invalid BCP-47"):
+            GlobalSettings(allowed_languages=["en", "123"])
+    # #endregion test_invalid_bcp47_rejected
+# #endregion TestGlobalSettingsValidators