submitJob — 503 retry behavior (10 new tests):
- calls onModelWaiting with correct state + retryAfterSecs on each 503
- retries until model ready and returns job_id
- tracks all three model states (unloaded, loading, waiting_for_gpu)
- uses retry_after_secs from response body
- falls back to Retry-After header when body field absent
- falls back to 15s when both body and header are absent
- throws after maxAttempts exhausted (fetch called exactly N times)
- does NOT call onModelWaiting for non-503 errors
- does NOT retry on non-503 errors (throws immediately, one fetch call)
- works correctly without an onModelWaiting callback
getModelStatus (6 new tests):
- returns parsed status for each model state tag
- includes optional fields (loaded_at, vram_*, retry_in_secs)
- calls the correct WHISPER_URL/model/status endpoint
- throws when server returns non-ok
Uses vi.useFakeTimers()/runAllTimersAsync() to eliminate real delays.
Rejection handler attached before timer advance to avoid unhandled-rejection
false positives from Vitest's detector.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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