feat(training): drop info heading and show last training time

tests/test_writer_features.py

@@ -1184,12 +1184,15 @@ class TrainingSummaryTests(unittest.IsolatedAsyncioTestCase):
 
     def test_rich_html_contains_only_filled_blocks(self) -> None:
         rendered = bot.training_info_rich_html(
-            {"about": "Канал про ИИ", "topics": "", "style": "сухо", "audience": ""}
+            {"about": "Канал про ИИ", "topics": "", "style": "сухо", "audience": ""},
+            "2026-10-29 18:11:35",
         )
-        self.assertIn("<h2>", rendered)
+        self.assertNotIn("<h2>", rendered)
+        self.assertTrue(rendered.startswith("<h3>"))
         self.assertIn("Канал про ИИ", rendered)
         self.assertNotIn("Основные темы", rendered)
-        self.assertEqual(bot.training_info_rich_html({}), "")
+        self.assertIn("Последнее обучение: 29.10.2026, 20:11", rendered)
+        self.assertEqual(bot.training_info_rich_html({}, ""), "")
 
     async def test_summary_is_saved_after_profile_rebuild(self) -> None:
         with patch.object(bot, "create_tone_profile", new=AsyncMock(return_value="профиль")), \