tests: pin ink engine in _make_tui_argv npm-bootstrap tests (post-merge semantic fix)

Main's rewritten test_tui_npm_install.py tests call _make_tui_argv expecting
the Ink/npm flow unconditionally; with the dual-engine dispatch merged in,
_resolve_tui_engine() auto-selects opentui whenever ui-opentui/dist is built
in the repo, routing the call away from the path under test (first subprocess
became 'node --version' instead of 'npm run build'). Pin the engine to ink
via an autouse fixture, mirroring the existing pinning precedent in
test_tui_resume_flow.py.

tests/tools/test_send_message_target_parse.py

@@ -0,0 +1,20 @@
+"""Parser-only tests for send_message targets.
+
+These stay separate from ``test_send_message_tool.py`` because that module
+skips wholesale when optional Telegram dependencies are not installed.
+"""
+
+from tools.send_message_tool import _parse_target_ref
+
+
+def test_photon_e164_target_is_explicit() -> None:
+    chat_id, thread_id, is_explicit = _parse_target_ref("photon", "+15551234567")
+
+    assert chat_id == "+15551234567"
+    assert thread_id is None
+    assert is_explicit is True
+
+
+def test_e164_target_still_requires_phone_platform() -> None:
+    assert _parse_target_ref("matrix", "+15551234567")[2] is False
+