Replaces 8 setTimeout sleeps with vi.waitFor on the actual signal
(textarea value, fetch URL recorded, onCountChange call) and converts
3 .not.toThrow smoke tests into behavioural assertions:
- "no onCountChange wired" → asserts initial comment text still renders
- "network error during reload" → asserts empty-hint state is shown
- "non-OK reload" → asserts empty-hint state is shown
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Whitespace-only quotedText not seeded, no onCountChange not provided,
fetch network error during reload, non-OK reload response, own
comment with edit/delete affordances.
5 new tests covering ~10 branches.
Refs #496.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
