Conflict resolutions + integration fixes:
- CreatePost: kept the branch's merge-into-existing meta persistence (equivalent
to main's #86 replace on create, and what the automations flow was built on).
- FacebookSettings.vue: kept both new defaults (previewOnly + meta).
- RunGenerateNode + GenerateNodeConfig.vue: ContentType::InstagramCarousel was
removed on main (#80); an IG carousel is now a multi-image instagram_feed, so
the carousel-capable list uses InstagramFeed.
- GenerateNodeTest: fixtures use the ContentType enum and the new instagram_feed
carousel signal.
- Added new automation-related routes and controllers for managing automations.
- Introduced automation nodes in the UI with distinct styles and interactions.
- Updated sidebar to include navigation for automations.
- Enhanced post creation logic to support automation metadata.
- Refactored content type and platform enums into types for better type safety.
- Added localization for automation-related terms in English, Spanish, and Portuguese.
- Improved error handling in various components to accommodate new features.
