test(chat): refresh restore guard source-shape assertions (#5224)

tests/test_1694_terminal_cleanup_ownership.py

@@ -123,7 +123,7 @@ def test_settled_restore_and_error_close_only_the_event_source_owner():
     assert "function _handleStreamError(source)" in MESSAGES_JS
     assert "_closeSource(source);" in restore_body
     assert "_closeSource(source);" in error_body
-    assert "_restoreSettledSession(source)" in event_body
+    assert "_restoreSettledSession(source, {preserveVisibleOnShorterTerminalSnapshot:true})" in event_body
     assert "_handleStreamError(source)" in event_body
     assert "_restoreSettledSession())" not in event_body
     assert "_handleStreamError();" not in event_body

tests/test_session_rotate_url_sync.py

@@ -23,13 +23,12 @@ def test_stream_completion_syncs_rotated_session_id_to_tab_state():
     assert settled_pos != -1
 
     # Proximity window scoping "the completion/settled handler block near the
-    # session assignment". #4720 added a documented `_oldestIdx` reset statement
-    # into the completion block (between the marker and the localStorage sync),
-    # growing it past the original 800; widen to 1000 — still well within the
-    # single done/settled handler, so the guard's intent (the rotated session id
-    # is synced to tab state right after the session assignment) is preserved.
+    # session assignment". The settled restore block now includes the terminal
+    # stale-prefix guard before the tab-state sync, so keep the assertion local
+    # to the handler while widening the slice enough to cover the new helper
+    # state and the unchanged localStorage/update-url writes.
     completion_block = MESSAGES_JS[completion_pos : completion_pos + 1000]
-    settled_block = MESSAGES_JS[settled_pos : settled_pos + 1000]
+    settled_block = MESSAGES_JS[settled_pos : settled_pos + 1800]
 
     for block in (completion_block, settled_block):
         assert "localStorage.setItem('hermes-webui-session',S.session.session_id);" in block