New automation canvas + multi‑step loops

Features

• New automation canvas built with Svelte Flow – We’ve rebuilt the automation editor on top of Svelte Flow, bringing smoother performance and drag‑and‑drop improvements.
• Layout improvements – Svelte Flow’s layout algorithm provides clearer arrangement of nodes and better auto‑layout when adding or reordering steps .
• Loop over multiple steps – Loop blocks now let you include multiple steps inside a single loop, enabling more complex repeating sequences

Fixes & improvements

• Refined node connection behaviour and edge rendering.
• Various bug fixes around drag‑and‑drop and loop step configuration.
• TypeScript refactor – Much of the automation UI has been migrated to TypeScript for improved type safety and maintainability.