- Introduce dynamic loading of concurrent render limits from the database for both page rendering and thumbnail generation.
- Update API to utilize the loaded concurrency settings, defaulting to 8 for page renders and 4 for thumbnails.
- Modify front-end settings page to reflect changes in concurrency limits and provide user guidance on their impact.
- Ensure that changes to limits require a server restart to take effect, with clear messaging in the UI.
- Remove unused image dependencies from Cargo.lock.
- Update API to handle thumbnail generation and checkup processes.
- Introduce new routes for rebuilding and regenerating thumbnails.
- Enhance job tracking with progress indicators for thumbnail jobs.
- Update front-end components to display thumbnail job status and progress.
- Add backend logic for managing thumbnail jobs and integrating with the API.
- Refactor existing code to accommodate new thumbnail functionalities.
