Add backend Slack alert support with change-stream service and Team UI wiring

[vkarpov15]

Motivation

• Persist workspace alert configurations in the studio DB so alerts survive restarts and can be managed via the Team UI.
• Route Slack test messages through the backend rather than calling the mothership directly from the frontend.
• Deliver change-stream-driven Slack notifications in a concurrency-safe way to avoid duplicate sends when multiple processes are running.

Description

• Added a studio-backed Alert model (backend/db/alertSchema.js) and CRUD/test actions under backend/actions/Alert (createAlert, updateAlert, listAlerts, deleteAlert, sendTestAlert).
• Implemented backend/alerts/alertUtils.js for template rendering and mothership notification, and backend/alerts/startAlertService.js which listens to the MongoDB change stream, caches enabled alerts, and delivers Slack notifications; leader leasing is implemented via a studio__alertLeases collection to ensure a single leader process handles deliveries.
• Wired service startup in backend/index.js to register the __Studio_Alert model and start the alert service when options.changeStream is enabled, and switched db.watch() to db.watch([], { fullDocument: 'updateLookup' }) to get full documents on updates.
• Frontend changes: added Alert methods to frontend/src/api.js, and updated the Team alert wizard (frontend/src/team/team.js and frontend/src/team/team.html) to load/save alerts from the backend, send test alerts via Alert.sendTestAlert, show save/test status, and disable UI while saving.
• Updated backend/authorize.js to include required roles for the new Alert.* actions.

Testing

• Rebuilt frontend CSS with npm run tailwind, which completed successfully.
• Built frontend bundle with node build.js (webpack compiled successfully).
• Launched a simple local express stub for API endpoints and used a Playwright script to open /#/team and capture a screenshot of the alert wizard, which ran and produced an artifact.
• No automated integration tests were added; manual smoke tests above passed.

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Codex Task

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Project	Deployment	Actions	Updated (UTC)
studio	Ready	Preview, Comment	Feb 3, 2026 11:09am