Спампаваць webOS Dev Manager 1.99.21

## What's Changed
• Add cross-platform Nix flake support by @sachk in https://github.com/webosbrew/dev-manager-desktop/pull/415
• nix：fix build and install Linux desktop integration by @OmarDardery in https://github.com/webosbrew/dev-manager-desktop/pull/420
• macos：request local network permission by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/421
• screenshot：retry legacy DISPLAY capture at 1920x1080 by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/426
• remote-file：read the device name from the URL path by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/424
• Allow DNS hostnames for device addresses by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/437
• Persist developer mode renewal tokens across restarts by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/436
• Expose installed app version in desktop Settings by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/438
• Open file dialogs when the system has no download directory by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/427
• files：keep toolbar buttons on screen for deep paths by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/428
• Build and test the Nix package in CI by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/439
• build：bump ares-cli-rs to v0.7.1 by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/425
• Fix RPM zlib dependency for Fedora compatibility by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/440
• Report installation failures and bound Luna subscription cleanup by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/443
• Propagate IPK HTTP server failures and settle startup/cleanup by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/444
• Harden generated renewal script error handling by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/445
• Stop batch upload retries after a successful transfer by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/446
• Clean up failed IPK staging without losing transfer errors by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/447
• Bound uninstall response waiting and report early EOF by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/448
• Support AppImageUpdate for Linux AppImages by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/442
• Parse PmLog metadata for multi-digit PID and TID fields by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/449
• Handle invalid package versions and compare complete semver by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/450
• fix：handle repository failures with timeout and retry by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/451
• Refresh Developer Account setup guidance by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/441
• Fix no-auth devices and terminal input; refresh AppImage WebKitGTK by @mariotaku in https://github.com/webosbrew/dev-manager-desktop/pull/453

## New Contributors
• @sachk made their first contribution in https://github.com/webosbrew/dev-manager-desktop/pull/415
• @OmarDardery made their first contribution in https://github.com/webosbrew/dev-manager-desktop/pull/420

**Full Changelog**：https://github.com/webosbrew/dev-manager-desktop/compare/v1.99.20...v1.99.21