Addresses CodeRabbit review feedback on the Anime Browser:
- reject repository package/apk names that are not plain identifiers, and
verify the install target resolves inside the extensions directory
- count mpv's %n% option escape in UTF-8 bytes, and escape backslashes in
header values so a trailing one cannot eat the list separator
- key the bridge extension-id cache by APK content, so an in-place upgrade
re-uploads instead of running the previous build
- bound every bridge, release-listing, and download request with a timeout
- enforce the APK size limit while streaming rather than after buffering
- read APK bytes on demand instead of holding a base64 copy per extension
for the lifetime of the browser
- serialize preference mutations and write the file atomically
- handle the sidecar spawn error event, and wait for the child to exit in
stop() before returning
- report a failed Anime Browser bootstrap instead of showing the starting
banner forever
- keep the preferences panel's save confirmation and in-flight multi-select
edits by re-rendering only on a structural schema change