cgit's plain handler cannot parse inline branch refs in the URL
path (e.g. plain/main/gui/...). Removing the ref segment lets
cgit default to HEAD, which resolves the upstream
decky-installer script correctly.

Switch the installer to the current main-branch Decky script and only continue with AeroCore plugin setup when plugin_loader.service is active after the upstream installer runs.

This preserves the uninstall/update choice for users who already have Decky Loader installed instead of forcing the plugin installation path directly.

Use semantic version ordering when selecting the latest store version so multi-digit patch versions are not sorted behind older releases.

Prevent broken pipe and aborted connection errors during WebSocket cleanup from surfacing after the installer has already handled the Decky disconnect.

Previously, on the plugin_download_finish event we only broke out of the
receive loop when 'confirmed' was False. In the normal flow 'confirmed'
is always True, so the loop kept waiting for a REPLY whose 'result' was
non-None. When the server returns 'result: null' (a common success
reply), no branch matched and the loop blocked forever on client.recv(),
making the installer appear successful but never exit.

The download_finish handler now breaks unconditionally, since the event
itself already indicates a completed install.

Also add timeout handling to the receive loop:
- IDLE_TIMEOUT: max gap between any two server messages, guards against
  silent server stalls.
- OVERALL_TIMEOUT: hard upper bound on the entire install as a fallback.
Both are enforced by wrapping client.recv() with asyncio.wait_for; on
timeout a TimeoutError is raised and propagates after the connection is
cleanly closed in the finally block.

Co-authored-by: llm-git <llm-git@ttll.de>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Point the Decky Loader client download URLs to the
accelerator-installer repository.

Co-authored-by: llm-git <llm-git@ttll.de>

Fix store URL setting key to match Decky Loader official implementation

Co-authored-by: tranch <5999732+tranch@users.noreply.github.com>

Co-authored-by: tranch <5999732+tranch@users.noreply.github.com>

Co-authored-by: tranch <5999732+tranch@users.noreply.github.com>