- update npm dependencies, including Vite 8.1.0 and TypeScript 6.0.3
- update bundled Deno engine locks and macOS arm64 binary to 2.8.3
- add npm run check:updates for npm and engine freshness checks
- ignore local agent/planning notes and remove tracked internal docs
- Add backendRegisteredIds and backendDispatchPromises for single dispatch enforcement
- Add detach_download_for_reconfigure to safely modify properties of active downloads
- Add applyProperties logic handling completed, failed, paused, and active queues
- Add extractValidDownloadUrls and fix multi-url paste handling
- Setup vitest and add useDownloadStore unit tests for backend registration lifecycle
- refactor(backend): use tokio::sync::Mutex for DbState and update commands to async
- fix(backend): remove unconditional post-queue system action in scheduler
- refactor(backend): remove dead WebSocket aria2 progress loop
- fix(backend): use character count for deep link payload length check
- fix(backend): implement dynamic port fallback for extension server
- build(backend): apply macos codesigning step for release builds
- security(backend): add explicitly defined Content-Security-Policy
- fix(frontend): replace pause_download API call with remove_download for file cleanup
- fix(frontend): resolve bug ignoring 0% progress reporting
- fix(frontend): append instead of overwrite deep link URLs when Add Modal is open
- style(frontend): append standard .dark class for dark mode themes
- style(frontend): remove ghost row layout hack from download table
- build: decouple typescript binding generation from build step
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