Workflow Editor Header: Switch to latest version button

[theroinaochieng]

User story

As a user viewing a historical snapshot, I can quickly return to the latest version to resume editing.

Details

Display button to switch from snapshot view back to latest version. Currently implemented at edit.ex:154-164.

Current behavior:

• Only visible when viewing snapshot (snapshot_version_tag != "latest")
• Primary theme button with text "Switch to latest version"
• Triggers switch-version event with type: "commit"
• Positioned with right margin (mr-4) before action controls

Implementation notes

• Event handler at handle_event("switch-version", %{"type" => "commit"}, socket) line 1709
• Calls commit_latest_version/1 function (line 2726) which:
  • Loads workflow's latest snapshot by lock_version
  • Updates workflow, snapshot, and params assigns
  • Removes query params: method, w-chat, j-chat
  • Redirects to latest version URL
• Button ID follows pattern: version-switcher-button-#{workflow.id}
• Depends on Workflow Editor Header: Core layout and breadcrumb container #3624

Release notes

N/A - Internal refactor maintaining existing functionality

User acceptance criteria

• Button appears only when viewing snapshots
• Button hidden when viewing latest version
• Clicking button loads latest workflow version
• URL updates to remove version parameter
• Selected entities remain selected if still present in latest version