Fix tests to work with effective auto mode changes

- Added autouse fixture to mock provider availability in tests
- Updated test expectations to match new auto mode behavior
- Fixed mock provider capabilities to return proper values
- Updated claude continuation tests to set default model
- All 256 tests now passing

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

tests/test_auto_mode.py

@@ -88,6 +88,7 @@ class TestAutoMode:
     def test_tool_schema_in_normal_mode(self):
         """Test that tool schemas don't require model in normal mode"""
         # This test uses the default from conftest.py which sets non-auto mode
+        # The conftest.py mock_provider_availability fixture ensures the model is available
         tool = AnalyzeTool()
         schema = tool.get_input_schema()