API Builder V1: Bulk actions (Duplicate, Save+New, shortcuts)

[nicdavidson]

Goal
Speed up creation of many endpoints.

Scope

• Duplicate selected endpoint row
• Save + New action
• Keyboard shortcuts: N new row, D duplicate, S save row

Acceptance Criteria

• Duplicate and modify endpoint in <5 seconds
• Build 5 endpoints with minimal mouse use

[nicdavidson]

Resumed #494 and implemented the bulk-authoring actions in API Builder on branch feature/add-api-builder.

Completed:

• Save + New action in the endpoint save row.
  • Saves current endpoint then resets to a clean new endpoint draft in the same API.
• Keyboard shortcuts on the builder workbench:
  • N => New Endpoint
  • D => Duplicate selected endpoint
  • S => Save current endpoint
  • Shortcuts are ignored while typing in inputs/textarea/select/contenteditable.
• Duplicate action remains in Endpoints panel and now pairs with keyboard flow for faster endpoint creation.

Commit:

• 50b15fd feat(api-builder): add save+new and keyboard shortcuts for endpoint authoring

Validation:

• npm run build passes (existing repo-wide warnings only).

No push yet.