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/Controller/InteractionReportingContracts.hs

@@ -0,0 +1,21 @@
+module Web.Controller.InteractionReportingContracts where
+
+import Web.Types
+import Web.View.InteractionReportingContracts.Index
+import Web.View.InteractionReportingContracts.Show
+import Generated.Types
+import IHP.Prelude
+import IHP.ControllerPrelude
+
+instance Controller InteractionReportingContractsController where
+    beforeAction = ensureIsUser
+
+    action InteractionReportingContractsAction = do
+        contracts <- query @InteractionReportingContract
+            |> orderByDesc #createdAt
+            |> fetch
+        render IndexView { contracts }
+
+    action ShowInteractionReportingContractAction { interactionReportingContractId } = do
+        contract <- fetch interactionReportingContractId
+        render ShowView { contract }