After migrating ContextPresetManager.load_all to return Result[Dict],
the caller in app_controller.load_context_preset needs to extract
.data from the Result before checking 'name not in presets'.
Updates:
- src/app_controller.py:load_context_preset - check result.ok and
extract result.data before iterating; raise RuntimeError if
result.ok is False (consistent with the convention).
- tests/test_context_presets_manager.py:test_manager_load_all -
extract result.data before assertions.
Tests verified:
- tests/test_context_presets_manager.py (4 tests) PASS
- tests/test_project_switch_persona_preset.py::
test_load_context_preset_missing_raises_keyerror PASS (KeyError
raised correctly when preset not found)
- tests/test_phase6_engine.py (3 tests) PASS
ed