The destination preflight / refusal path suppressed the whole progress lane
for a flat DM regardless of mode, so an operator who WROTE `tool_progress:
all` got nothing there (before #108668 they got text bubbles via the
fallback). Silence is right only for Slack's tier default, where no text
lane was asked for; explicit new/all now routes through the editable text
fallback instead. Also hoists resolve_tool_progress into the existing
display_config import in _run_agent_display_settings.
Test proven red on the salvaged head (adapter.sent == [] with `all`).
4748caff76