fix(test): update run-journal reconnect anchor for the (1/N) template literal

test_error_reconnect_path_can_restore_from_journal anchored on the exact string
setComposerStatus('Reconnecting — but the first status was changed to a template
literal `Reconnecting… (1/${_retryDelays.length})` for the staged-probe counter,
so that single-quoted anchor no longer exists (ValueError: substring not found in
CI shard 2). Re-anchor on the block's stable entry point _reconnectAttempted=true;
(unique in source) and widen the window to 1100 chars; the st.active /
st.replay_available / Restoring stream / _runJournalReplayParams() assertions are
unchanged.

tests/test_run_journal_frontend_static.py

@@ -222,8 +222,12 @@ def test_reattach_path_uses_replay_when_status_reports_journal():
 
 
 def test_error_reconnect_path_can_restore_from_journal():
-    reconnect_pos = MESSAGES_SRC.index("setComposerStatus('Reconnecting")
-    block = MESSAGES_SRC[reconnect_pos : reconnect_pos + 900]
+    # Anchor on the reconnect block's stable entry point rather than the exact
+    # composer-status string: the first status was changed to a template literal
+    # `Reconnecting… (1/${_retryDelays.length})` (staged-probe counter), so the
+    # old single-quoted "setComposerStatus('Reconnecting" anchor no longer exists.
+    reconnect_pos = MESSAGES_SRC.index("_reconnectAttempted=true;")
+    block = MESSAGES_SRC[reconnect_pos : reconnect_pos + 1100]
 
     assert "st.active" in block
     assert "st.replay_available" in block