[jaiprasad04]

Summary

Implements a multi-step visual workflow canvas and interactive trigger node:

• Visual Workflow Canvas: Interactive nodes with smooth pan, zoom, floating bottom toolbar, minimap, and selection tooling.
• Interactive Trigger Nodes: Supports Schedule (daily, weekly, interval, cron with next run estimation), Manual, Webhook (with secret rotation), and Chat Message triggers.
• Node Controls: Floating toolbar with duplicate, lock/unlock, and delete actions.
• Elastic Bezier Connections: Visual wire connectors with midpoint disconnect controls.
• Backend Infrastructure: SQLite and PostgreSQL workflow models, Alembic migrations, CRUD REST APIs, run history tracking, and unit tests.
• CI / Build Quality: All frontend tests (367/367), ESLint checks, backend tests, and desktop environment suites pass cleanly.