Requirements

Goals

• Implement the Configure step that displays the exact same input fields as the single source creation form, applied uniformly to all selected sources.
• Persist validated bulk settings into ImportSession.bulk_settings so they carry forward to the Confirm step and are applied during import.
• Validate required fields and prevent progression until the form is valid.

Technical Considerations

• Reuse the existing single-source form partial to render fields and validation messages; adapt controller params mapping to persist the resulting bulk settings JSON into ImportSession.bulk_settings. Ensure ImportSession uses an integer-based user reference (standard Rails user_id integer foreign key).
• Use the engine's existing parameter sanitization and validation patterns for source attributes.
• Ensure the form is accessible and styled with Tailwind consistent with the rest of the engine.
• Disallow per-feed overrides in this release; the stored settings apply uniformly to all selected sources during import.

Dependencies

• Enqueue Health Checks & Turbo Stream UI (health results determine which sources are in the target set)
• Implement OPML Import Wizard Shell (wizard rendering and step navigation)