Root cause: tests used try/finally { vi.useRealTimers() / vi.useFakeTimers() }
back-and-forth. When any test's finally-block called vi.useFakeTimers(),
subsequent tests inherited fake timer state causing 50ms real setTimeouts
to not fire and mockFetch to accumulate calls across test boundaries.
Fix: consolidate timer management to beforeEach/afterEach hooks.
- beforeEach: vi.useFakeTimers() — all tests start from known fake state
- afterEach: cleanup() + vi.useRealTimers() — restore real timers for next test
- Individual tests: use vi.advanceTimersByTimeAsync(50) instead of real setTimeout
Also removed duplicate afterEach(cleanup()) and unused waitFor import.
Closes#1207.
Co-authored-by: Molecule AI Core-FE <core-fe@agents.moleculesai.app>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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