Workflow Builder: Move or Clone

Simplified the app navigation and added flow grouping, search improvements, and a cleaner browse experience. Added clone functionality for quickly duplicating workflow nodes.

• Move/Clone buttons — Direct buttons + click-based alternative to drag for repositioning nodes
• Browse mode — Flow grouping, navigation, and interaction improvements
• Search improvements — Visibility fix and enhanced search functionality
• Navigation simplification — Streamlined nav to just Flows, Contacts, and History; removed Home and Simulator links; redirected root path to /flows
• Flow creation — Name modal when creating new flows, inline vertical sections solves the unnamed flows we saw in 90% of the user tests.