testing new features

tests/test_i18n.py

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+from cli.i18n import Translator, get_lang, set_lang, setup_i18n, t
+
+
+class TestTranslator:
+    def test_ru_by_default(self):
+        setup_i18n()
+        assert get_lang() == "ru"
+
+    def test_ru_returns_russian(self):
+        tr = Translator("ru")
+        assert "финансовую" in tr.t("cmd.init.help")
+
+    def test_en_fallback_to_ru(self):
+        tr = Translator("en")
+        result = tr.t("cmd.init.help")
+        assert "финансовую" in result
+
+    def test_unknown_key_returns_key(self):
+        tr = Translator("ru")
+        assert tr.t("nonexistent.key") == "nonexistent.key"
+
+    def test_set_lang(self):
+        setup_i18n()
+        set_lang("en")
+        assert get_lang() == "en"
+
+    def test_t_function(self):
+        setup_i18n()
+        result = t("cmd.init.ok", path="data/model.json")
+        assert "data/model.json" in result
+        assert "Пустая" in result
+
+    def test_global_ok(self):
+        result = t("global.ok")
+        assert result == "OK"
+
+    def test_prompt_analyze(self):
+        result = t("prompt.analyze")
+        assert "AI-ассистент" in result
+
+    def test_custom_lang_init(self):
+        tr = Translator("de")
+        result = tr.t("cmd.init.help")
+        assert "финансовую" in result  # fallback to ru