Frontend now uses the async job queue for level 3/4 requests instead
of a 120s blocking POST. Submits with ?async=true, gets job_id, then
polls every 2.5s up to 90s. Button label reflects live server state:
'Queued...' while waiting, 'Generating...' while the model runs.
- api.ts: RecipeJobStatus interface + suggestAsync/pollJob methods
- store: jobStatus ref (null|queued|running|done|failed); suggest()
branches on level >= 3 to _suggestAsync(); CLOUD_MODE sync fallback
detected via 'suggestions' key on the response
- RecipesView: button spinner text uses jobStatus; aria-live
announcements updated for each phase (queued/running/finding)
- compose.override.yml: cf-orch agent --node-id renamed kiwi -> sif
for the upcoming Sif hardware node