Add config message items selector to imap option flow (#115108)

* Update const.py

* Update config_flow.py

* Update coordinator.py

* Update coordinator.py

* Update strings.json

* Update config_flow.py

* Update const.py

* Update coordinator.py

* Update config_flow.py

* Update config_flow.py

* Update test_diagnostics.py

* Update const.py

* Update test_init.py

* Update test_diagnostics.py

* Update test_diagnostics.py

* Update test_diagnostics.py

* Update test_init.py

* Update test_diagnostics.py

* Update test_init.py

* Update test_diagnostics.py

* Update test_diagnostics.py

* Update test_diagnostics.py

* Update test_config_flow.py

* Update config_flow.py

* Update test_config_flow.py

* Update test_init.py

* Update const.py

* Only make text and headers optional

* Add message data tests

* Add message data test

* Update test_config_flow.py

* Update test message data

* Fix ruff

* Fix ruff

* Update test_init.py

* Update strings.json

---------

Co-authored-by: jbouwh <jan@jbsoft.nl>
Co-authored-by: Jan Bouwhuis <jbouwh@users.noreply.github.com>

tests/components/imap/test_init.py

@@ -674,6 +674,41 @@ async def test_message_is_truncated(
     assert len(event_data["text"]) == 3
 
 
+@pytest.mark.parametrize("imap_search", [TEST_SEARCH_RESPONSE])
+@pytest.mark.parametrize(
+    "imap_fetch", [(TEST_FETCH_RESPONSE_TEXT_PLAIN)], ids=["plain"]
+)
+@pytest.mark.parametrize("imap_has_capability", [True, False], ids=["push", "poll"])
+@pytest.mark.parametrize("event_message_data", [[], ["text"], ["text", "headers"]])
+async def test_message_data(
+    hass: HomeAssistant,
+    mock_imap_protocol: MagicMock,
+    caplog: pytest.LogCaptureFixture,
+    event_message_data: list,
+) -> None:
+    """Test with different message data."""
+    event_called = async_capture_events(hass, "imap_content")
+
+    config = MOCK_CONFIG.copy()
+    # Mock different message data
+    config["event_message_data"] = event_message_data
+    config_entry = MockConfigEntry(domain=DOMAIN, data=config)
+    config_entry.add_to_hass(hass)
+    assert await hass.config_entries.async_setup(config_entry.entry_id)
+    await hass.async_block_till_done()
+    # Make sure we have had one update (when polling)
+    async_fire_time_changed(hass, utcnow() + timedelta(seconds=5))
+    await hass.async_block_till_done()
+    state = hass.states.get("sensor.imap_email_email_com")
+    # We should have received one message
+    assert state is not None
+    assert state.state == "1"
+    assert len(event_called) == 1
+
+    event_data = event_called[0].data
+    assert set(event_message_data).issubset(set(event_data))
+
+
 @pytest.mark.parametrize(
     ("imap_search", "imap_fetch"),
     [(TEST_SEARCH_RESPONSE, TEST_FETCH_RESPONSE_TEXT_PLAIN)],