### The bug
`draft_email` and `send_email` take an optional `connectedAccountId`.
When an agent omits it — which it does whenever it has no way to know
the id — `EmailComposerService` resolved the account like this:
```ts
const allAccounts = await this.connectedAccountRepository.find({
where: { workspaceId, archivedAt: IsNull() },
});
return allAccounts[0].id;
```
The first connected account **in the workspace**, ignoring the
`userWorkspaceId` that `ToolExecutionContext` already carries — with no
`ORDER BY`, so "first" is whatever the planner returns.
We hit this on our own workspace: an agent chat drafted a customer email
on behalf of one user, and the draft landed in a different user's
mailbox. The tool reported `success: true` with a `connectedAccountId`
belonging to someone who was not in the conversation, so nothing
surfaced the mistake. `send_email` shares this composer, so the same
fallback sends mail from another person's address.
### The fix
- **No id supplied** → the caller's own account
(`context.userWorkspaceId`), else an account whose `visibility` is
`workspace`, else throw `CONNECTED_ACCOUNT_NOT_FOUND`. Never a
colleague's private mailbox by accident.
- **Id supplied** → used as given, whoever owns it. Blocking a member
from composing through another member's account is a product decision
this PR does not make; the mix-up above happens when no id is passed at
all.
- **No `userWorkspaceId`** (workflow run) → unchanged.
Ordering is `createdAt ASC, id ASC` so the no-caller path is
deterministic when rows share a `createdAt` — which the seed data does.
### Verified against a real workspace
Run locally against the seeded `test` database — 7 connected accounts in
one workspace, owned by four different members, **all sharing one
`createdAt`**. Same spec, composer swapped:
| Scenario | on `main` | with this PR |
|---|---|---|
| Phil's agent composes, no id | **tim@apple.dev's account** | phil's
own |
| explicit id (jony's), caller is phil | jony's | jony's |
| workflow run (no caller), explicit id | jony's | jony's |
| **workflow run (no caller), no id** | **first account, unordered** |
**first account, `createdAt`/`id` ordered** |
| caller with no account | silently resolved a colleague's | throws |
### What this does not fix
A workflow run carries no caller: `ToolBackedWorkflowAction` executes
the tool with `{ workspaceId }` and no `userWorkspaceId`. So when an
email step's sender resolves to nothing — `postprocessInput` guards for
it — the composer still falls back to the workspace's first account,
because there is no identity to attribute the mail to. The pick is at
least deterministic now. Giving workflow runs an owner is a separate
change.
Normal workflow steps are unaffected:
`EmailWorkflowActionBase.resolveSenderConnectedAccountId` resolves the
configured sender (a connected-account id, or a workspace member id from
a resolved variable) and passes it explicitly.
### Behaviour change to expect
A caller with no connected account of their own, in a workspace with no
shared account, now gets an error where the call previously "succeeded"
from a colleague's mailbox.
### Tests
Resolution is exercised by
`test/integration/email-tool/suites/email-composer-connected-account.integration-spec.ts`
against a real workspace — eight cases: supplied id honoured, supplied
id with no caller, invalid id, unknown id, caller's own account,
workspace-shared fallback (flips `visibility` in Postgres and restores
it), no usable account, and first-account-when-no-caller.
The service's unit spec is deleted: mocking the DI graph asserted the
mock rather than the resolution, and every case it covered now runs
against the database. The pure selection logic keeps unit specs —
`select-connected-account-id-for-caller.util.spec.ts` and
`is-connected-account-usable-by-caller.util.spec.ts`.
Not covered here: the workflow chain itself (`postprocessInput` →
`resolveSenderConnectedAccountId` → `DraftEmailWorkflowAction`), which
this PR does not change.
`npx nx typecheck twenty-server`, the email-tool and connected-account
suites, and the integration spec all pass; oxlint type-aware clean.
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