## Summary
Fixes 4 flaky DM expansion E2E tests in Desktop Smoke shard 1 that were
failing non-deterministically on CI (also reproducing on `main` at run
`29526844596`).
**Failing tests:**
- `channels.spec.ts:652` — creates the DM before preparing a persona
mention
- `channels.spec.ts:760` — routes an agent mention from an existing DM
to the expanded conversation
- `channels.spec.ts:815` — routes a relay-agent mention from an existing
DM to the expanded conversation
- `channels.spec.ts:940` — drops an expanded DM after the first message
fails
## Root Cause
Race condition: under fast CI execution, mock command completions
(create_managed_agent, open_dm) can resolve in non-deterministic order,
causing assertions to observe stale or mid-transition state.
## Fix
- **:652** — Move the `new-message-recipient-popover` hidden assertion
after `chat-title` settles (both names present), so it runs
post-transition rather than mid-transition.
- **:760, :940** — Add `createManagedAgentDelayMs: 100` to ensure
persona provisioning doesn't collapse into the same tick as the
expanded-DM open/start sequence.
- **:815** — Add `openDmDelayMs: 100` so the two open_dm calls resolve
in deterministic order.
## Validation
All 4 tests pass with `--repeat-each=3` (12/12 green) locally. Biome
lint clean.
## Scope
Test-only change: 12 insertions, 1 deletion in
`desktop/tests/e2e/channels.spec.ts`.
---
Investigated by Ferret, reviewed by Grumplestiltzkin.
Signed-off-by: Cameron Hotchkies <chotchkies@block.xyz>
Co-authored-by: Goose <opensource@block.xyz>
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