Ensure ensureCategory applies reverse path mapping (local → remote) before creating or editing qBittorrent categories. Uses PathMapper.reverseTransform to compute the remote save path and updates logging and error details to reference the transformed path. Adds integration tests covering category creation, updating, and no-op when the remote path already matches.
Implements support for configuring both qBittorrent and SABnzbd simultaneously, including migration from legacy config, protocol-aware routing, and protocol filtering. Adds new CRUD API routes for download clients, new UI management components, and updates setup and settings flows to use the new multi-client architecture. Updates documentation to describe the new structure and usage.
Introduced a Vitest-based backend unit testing framework with supporting scripts, helpers, and GitHub Actions integration. Refactored the admin settings page to a modular architecture, splitting monolithic logic into feature-specific tabs and hooks for improved maintainability and testability. Updated documentation to reflect the new testing setup and settings architecture, and added new dependencies for testing utilities.
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