chore: update development dependencies and improve test coverage

- Upgraded `pytest-asyncio` to version 1.0 to ensure compatibility with the latest features and improvements.
- Increased the coverage threshold in pytest configuration to 80%, enhancing the quality assurance process.
- Added a new `conftest.py` file to manage shared fixtures and improve test organization.
- Introduced multiple new test files to cover various components, ensuring comprehensive test coverage across the application.
- Updated the `.coverage` file to reflect the latest coverage metrics.

tests/test_run.py

@@ -0,0 +1,119 @@
+"""Tests for duty_teller.run (main entry point with mocks)."""
+
+import asyncio
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from duty_teller.run import main, _run_uvicorn, _set_default_menu_button_webapp
+
+
+def test_main_builds_app_and_starts_thread():
+    """main: calls require_bot_token, builds Application, register_handlers, starts uvicorn thread, run_polling."""
+    mock_app = MagicMock()
+    mock_app.run_polling = MagicMock(side_effect=KeyboardInterrupt())
+    mock_builder = MagicMock()
+    mock_builder.token.return_value = mock_builder
+    mock_builder.post_init.return_value = mock_builder
+    mock_builder.build.return_value = mock_app
+
+    # Avoid loading real DB when main() imports api.app (prevents unclosed connection warnings).
+    mock_session = MagicMock()
+    mock_scope = MagicMock()
+    mock_scope.return_value.__enter__.return_value = mock_session
+    mock_scope.return_value.__exit__.return_value = None
+
+    with patch("duty_teller.run.require_bot_token"):
+        with patch("duty_teller.run.ApplicationBuilder", return_value=mock_builder):
+            with patch("duty_teller.run.register_handlers") as mock_register:
+                with patch("duty_teller.run.threading.Thread") as mock_thread_class:
+                    with patch("duty_teller.db.session.session_scope", mock_scope):
+                        mock_thread = MagicMock()
+                        mock_thread_class.return_value = mock_thread
+                        with pytest.raises(KeyboardInterrupt):
+                            main()
+    mock_register.assert_called_once_with(mock_app)
+    mock_builder.token.assert_called_once()
+    mock_thread.start.assert_called_once()
+    mock_app.run_polling.assert_called_once()
+
+
+def test_run_uvicorn_creates_server():
+    """_run_uvicorn: creates uvicorn config and runs server (mocked)."""
+    with patch("uvicorn.Server") as mock_server_class:
+        mock_server = MagicMock()
+        # run_until_complete needs a real coroutine
+        mock_server.serve = MagicMock(return_value=asyncio.sleep(0))
+        mock_server_class.return_value = mock_server
+        _run_uvicorn(MagicMock(), 8080)
+    mock_server_class.assert_called_once()
+    mock_server.serve.assert_called_once()
+
+
+def test_set_default_menu_button_skips_when_no_base_url():
+    """_set_default_menu_button_webapp: returns early when MINI_APP_BASE_URL or BOT_TOKEN not set."""
+    with patch("duty_teller.run.config") as mock_cfg:
+        mock_cfg.MINI_APP_BASE_URL = ""
+        mock_cfg.BOT_TOKEN = "token"
+        _set_default_menu_button_webapp()
+        mock_cfg.MINI_APP_BASE_URL = "https://example.com"
+        mock_cfg.BOT_TOKEN = ""
+        _set_default_menu_button_webapp()
+    # No urlopen should be called
+    with patch("duty_teller.run.config") as mock_cfg:
+        mock_cfg.MINI_APP_BASE_URL = None
+        mock_cfg.BOT_TOKEN = "x"
+        _set_default_menu_button_webapp()
+
+
+def test_set_default_menu_button_skips_when_not_https():
+    """_set_default_menu_button_webapp: returns early when menu_url does not start with https."""
+    with patch("duty_teller.run.config") as mock_cfg:
+        mock_cfg.MINI_APP_BASE_URL = "http://example.com"
+        mock_cfg.BOT_TOKEN = "token"
+        _set_default_menu_button_webapp()
+    # No urlopen
+
+
+def test_set_default_menu_button_calls_telegram_api():
+    """_set_default_menu_button_webapp: when URL is https, calls Telegram API (mocked)."""
+    with patch("duty_teller.run.config") as mock_cfg:
+        mock_cfg.MINI_APP_BASE_URL = "https://example.com/"
+        mock_cfg.BOT_TOKEN = "123:ABC"
+        with patch("urllib.request.urlopen") as mock_urlopen:
+            mock_resp = MagicMock()
+            mock_resp.status = 200
+            mock_resp.__enter__ = MagicMock(return_value=mock_resp)
+            mock_resp.__exit__ = MagicMock(return_value=False)
+            mock_urlopen.return_value = mock_resp
+            _set_default_menu_button_webapp()
+    mock_urlopen.assert_called_once()
+    req = mock_urlopen.call_args[0][0]
+    assert "setChatMenuButton" in req.full_url
+    assert "123:ABC" in req.full_url
+
+
+def test_set_default_menu_button_handles_urlopen_error():
+    """_set_default_menu_button_webapp: on urlopen error, logs and does not raise."""
+    with patch("duty_teller.run.config") as mock_cfg:
+        mock_cfg.MINI_APP_BASE_URL = "https://example.com/"
+        mock_cfg.BOT_TOKEN = "123:ABC"
+        with patch("urllib.request.urlopen") as mock_urlopen:
+            mock_urlopen.side_effect = OSError("network error")
+            _set_default_menu_button_webapp()
+    mock_urlopen.assert_called_once()
+
+
+def test_set_default_menu_button_handles_non_200_response():
+    """_set_default_menu_button_webapp: on non-200 response, logs warning."""
+    with patch("duty_teller.run.config") as mock_cfg:
+        mock_cfg.MINI_APP_BASE_URL = "https://example.com/"
+        mock_cfg.BOT_TOKEN = "123:ABC"
+        with patch("urllib.request.urlopen") as mock_urlopen:
+            mock_resp = MagicMock()
+            mock_resp.status = 400
+            mock_resp.__enter__ = MagicMock(return_value=mock_resp)
+            mock_resp.__exit__ = MagicMock(return_value=False)
+            mock_urlopen.return_value = mock_resp
+            _set_default_menu_button_webapp()
+    mock_urlopen.assert_called_once()