Tested:
* Can sign in on saas -> can run local tools with or without credits->
can run saas only tools (if credits) -> can't run saas only tools
without credits
* Can sign in self-hosted -> can run all tools on remote if available ->
can run local when self-hosted unavailable
Clouds show on saas tools when connected
Tools are disabled when connected to self-hosted but cannot find server.
You also get banner
#cantwaitforplaywritetests
* Adds a fallback mechanism so the desktop app routes tool operations to
the local bundled backend when the user's self-hosted Stirling-PDF
server goes offline, and disables tools in the UI that aren't supported
locally.
* `selfHostedServerMonitor.ts` independently polls the self-hosted
server every 15s and exposes which tool endpoints are unavailable when
it goes offline
* `operationRouter.ts` intercepts operations destined for the
self-hosted server and reroutes them to the local bundled backend when
the monitor reports it offline
* `useSelfHostedToolAvailability.ts` feeds the offline tool set into
useToolManagement, disabling affected tools in the UI with a
selfHostedOffline reason and banner warning
- `SelfHostedOfflineBanner `is a dismissable (session-only) gray bar
shown at the top of the UI when in self-hosted mode and the server goes
offline. It shows: