Make API ConnectRequest optional for passwordless connections (#9445)

tests/integration/fixtures/host_mode_api_password.yaml

@@ -0,0 +1,14 @@
+esphome:
+  name: host-mode-api-password
+host:
+api:
+  password: "test_password_123"
+logger:
+  level: DEBUG
+# Test sensor to verify connection works
+sensor:
+  - platform: template
+    name: Test Sensor
+    id: test_sensor
+    lambda: return 42.0;
+    update_interval: 0.1s

tests/integration/test_host_mode_api_password.py

@@ -0,0 +1,53 @@
+"""Integration test for API password authentication."""
+
+from __future__ import annotations
+
+import asyncio
+
+from aioesphomeapi import APIConnectionError
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_host_mode_api_password(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test API authentication with password."""
+    async with run_compiled(yaml_config):
+        # Connect with correct password
+        async with api_client_connected(password="test_password_123") as client:
+            # Verify we can get device info
+            device_info = await client.device_info()
+            assert device_info is not None
+            assert device_info.uses_password is True
+            assert device_info.name == "host-mode-api-password"
+
+            # Subscribe to states to ensure authenticated connection works
+            loop = asyncio.get_running_loop()
+            state_future: asyncio.Future[bool] = loop.create_future()
+            states = {}
+
+            def on_state(state):
+                states[state.key] = state
+                if not state_future.done():
+                    state_future.set_result(True)
+
+            client.subscribe_states(on_state)
+
+            # Wait for at least one state with timeout
+            try:
+                await asyncio.wait_for(state_future, timeout=5.0)
+            except asyncio.TimeoutError:
+                pytest.fail("No states received within timeout")
+
+            # Should have received at least one state (the test sensor)
+            assert len(states) > 0
+
+        # Test with wrong password - should fail
+        with pytest.raises(APIConnectionError, match="Invalid password"):
+            async with api_client_connected(password="wrong_password"):
+                pass  # Should not reach here