[feat] Add gateway trigger subscriptions and deliveries UI

[jp-agenta]

Context

The backend can store trigger subscriptions and (with the api lane) dispatch them, but there is no UI to create or inspect them. Users need to pick a shared connection, choose which provider event to watch, bind a workflow, and later see whether deliveries succeeded.

What this adds

A Triggers settings area that mirrors the existing webhook-subscription UI.

Under Settings > Triggers, a subscriptions section lists a shared connection's subscriptions with create and edit drawers. The TriggerSubscriptionDrawer binds a workflow revision through the shared EntityPicker + workflowRevisionAdapter, and sends the destination as a references dict keyed workflow_revision in the /retrieve shape the backend expects:

references: { workflow_revision: { id: "<revision-id>" } }

The inputs mapping is edited as JSON in the shared editor. In edit mode the connection is locked, since it is the FK anchor of the subscription. The TriggerDeliveriesDrawer shows delivery history for a subscription so you can confirm events are landing and see failures.

Data fetching goes through three new hooks (useTriggerSubscriptions, useTriggerSubscription, useTriggerDeliveries) plus the entities api wiring, and a triggerReferenceSchema validates the reference shape.

Tests / notes

• gatewayTriggerApi.test.ts passes (13/13).
• pnpm lint-fix clean on web/.

What to QA

• Settings > Triggers: pick a shared connection, create a subscription, choose an event and bind a workflow revision via the picker. It saves and appears in the list.
• Edit that subscription. The connection field is locked; changing the event or rebinding the workflow saves.
• Open the deliveries drawer for a subscription. Past deliveries list with their status.
• Regression: the existing webhook-subscription (Automations) UI still renders and edits as before, since this reuses its components.

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Project	Deployment	Actions	Updated (UTC)
agenta-documentation	Ready	Preview, Comment	Jun 18, 2026 5:30pm

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