feat(#1): route TUI + web presenters through stream_turn_resilient

Complete b1's design-brief §8b promise ("all presenters share the
consumer"): the TUI and web SSE consumers now resume transparently on
a mid-stream drop, same as cli --send (v0.18.5). The TUI is the primary
beneficiary — long-lived dev sessions across laptop suspend.

Name-for-name swap of stream_turn -> stream_turn_resilient at the two
remaining consumer loops (tui.py:1321, web/server.py:294) + their
imports. No behavioral change on the happy path (resilient == stream
when there is no drop); suite 518 green; touched lines ruff+mypy clean
(pre-existing tui/web lint debt left untouched per surgical rule).

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "ratatoskr"
-version = "0.18.5"
+version = "0.18.6"
 description = "Worldtree Conversation API debug TUI — multi-pane observability dashboard"
 readme = "README.md"
 requires-python = ">=3.12"