During active streaming, dangerous-command approvals go through the
gateway path and are stored in _gateway_queues as _ApprovalEntry
objects, not in _pending. The _resolve_approval_legacy helper only
looked at _pending, so 'Allow for this session' never called
approve_session() — the user clicked Allow, the card vanished, but
the next dangerous command asked again.
Now when _pending has no matching entry, the helper peeks into
_gateway_queues to extract pattern_keys, calls approve_session(),
and marks found_target=True so resolve_gateway_approval also fires.
This commit is re-scoped to peek-only (no agent_session_key round-trip,
no state_db metadata changes).
Includes:
- Import + fallback for _gateway_queues
- Null-safe key filtering in all_keys
- Source-contract test (static) + functional test with
@requires_agent_modules skip marker for CI
- All comments and docstrings in English
