Accept + implement ADR-010 frontend plugin hooks (contract 0.7.0)

Four data-only hooks on BasePlugin (get_settings_cards,
get_asset_panels, get_map_overlays, get_asset_presentation) with a
GET-only /api/pluginui consumer surface copying the dashboard-widgets
semantics. Pilots: warranty declares its asset panel; measuringtools
supplies its settings card, presentation, and calibration overlay -
the last hardcoded settings-nav entry is now hook-sourced. Generic
renderers for panels/overlays/presentation deferred per the ADR's
incremental adoption plan (documented in CONTRACT-STABILITY.md).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_plugin_contract.py

@@ -156,6 +156,23 @@ def test_plugin_get_reports_is_iterable(plugin_instances, name):
         )
 
 
+def test_baseplugin_has_frontend_contribution_hooks():
+    """The four ADR-010 frontend-contribution hooks are on the contract (0.7.0)."""
+    for hook in ('get_settings_cards', 'get_asset_panels',
+                 'get_map_overlays', 'get_asset_presentation'):
+        assert hasattr(BasePlugin, hook), f'{hook} missing from BasePlugin'
+
+
+@pytest.mark.parametrize('name', BUNDLED_PLUGINS)
+def test_plugin_frontend_hooks_return_lists(plugin_instances, name):
+    """The four ADR-010 hooks default to a list on every bundled plugin."""
+    plugin = plugin_instances[name]
+    assert isinstance(plugin.get_settings_cards(), list)
+    assert isinstance(plugin.get_asset_panels(), list)
+    assert isinstance(plugin.get_map_overlays(), list)
+    assert isinstance(plugin.get_asset_presentation(), list)
+
+
 def test_get_services_hook_has_consumer(app):
     """get_services is consumed by plugin_manager.get_service (no dead hook)."""
     with app.app_context():