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>

shopdb/__init__.py

@@ -20,7 +20,10 @@ from .plugins import plugin_manager
 # a real consumer (/api/dashboard/widgets). Pre-1.0 contract reduction.
 # 0.6.0: added the get_reports hook, consumed by GET /api/reports to merge
 # plugin report cards into the Reports hub. Additive optional hook, minor bump.
-__contract_version__ = '0.6.0'
+# 0.7.0: added the four ADR-010 frontend-contribution hooks (get_settings_cards,
+# get_asset_panels, get_map_overlays, get_asset_presentation), consumed by the
+# GET /api/pluginui/* endpoints. Four additive optional hooks, one minor bump.
+__contract_version__ = '0.7.0'
 
 # Product release version (see ADR-007). The product version and the
 # plugin-contract version above are distinct series with independent
@@ -119,6 +122,7 @@ CORE_BLUEPRINT_NAMES = (
     'users',
     'customfields',
     'setup',
+    'pluginui',
 )