Gate findings (Codex 2-CORE / Opus SHIP-WITH-FIXES), both fixed:
1. cross-profile leak — _pre_compression_continuation_session_id scanned all profiles' sessions,
matched only by parent_session_id; now filters children by _profiles_match(child, snapshot)
+ validates returned sid with is_safe_session_id. +cross-profile regression test.
2. restore-state poison — frontend wrote continuationSid to localStorage/URL BEFORE the inner
loadSession proved it loadable; removed the speculative write (success path at the loaded id
handles it). Updated the source-grep test to assert the safe form.
Bounded BFS (range(20)+seen) + recursion guard confirmed safe by both gates.
george-andra: GET /api/session surfaces continuation_session_id for a hidden pre-compression
snapshot; loadSession follows it so a mobile reload mid-compression recovers to the visible
continuation instead of a hidden snapshot (chat looked 'lost'). Resolved 2 conflicts (1615 behind):
sessions.js merged w/ #2971 re-arm guard; routes.py merged w/ _session_source_is_webui branch.
Co-authored-by: george-andra <george-andra@users.noreply.github.com>
