feat(P6/T02-T03): EnvelopeEmissionContract and InteractionReportingContract

T02: EnvelopeEmissionContractsController (index+show, read-only); widgetEnvelope
helper validates against contract v1.0 required attributes with inline warning
on missing view-context; adapterStatusBadge helper added to Application.Helper.View.

T03: InteractionReportingContractsController (index+show, read-only); API endpoint
POST /api/v1/interaction-events with bearer token auth against hub.api_key,
contract v1.0 field validation, and 201/422/401 responses.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/Routes.hs

@@ -35,6 +35,19 @@ instance AutoRoute DeploymentRecordsController
 instance AutoRoute AgentProposalsController
 
 -- Phase 6 — Cross-Framework UI Adaptation
+
+-- API endpoint: POST /api/v1/interaction-events
+instance CanRoute ApiInteractionEventsController where
+    parseRoute' = do
+        _ <- string "/api"
+        _ <- string "/v1"
+        _ <- string "/interaction-events"
+        endOfInput
+        pure CreateApiInteractionEventAction
+
+instance HasPath ApiInteractionEventsController where
+    pathTo CreateApiInteractionEventAction = "/api/v1/interaction-events"
+
 instance AutoRoute EnvelopeEmissionContractsController
 instance AutoRoute InteractionReportingContractsController
 instance AutoRoute WidgetAdapterSpecsController