#386 made Codex conversations resumable from Past Sessions, and
resumeMobileOverviewSession() correctly passes row.resumeId on to
resumeHistorySession(). The phone's own row projection never copied the
field off the unified-list item though, so row.resumeId was always
undefined there and a tapped Codex row started a FRESH session on a thread
that was already on disk. The desktop path worked; only the phone was blind.
The test fails without the projection line, and pins the other half too: a
claude row must not grow a resumeId, since the field is what distinguishes
"resume this conversation" from "start a new one".
Docs: CLAUDE.md and architecture-invariants both still described the unified
list as merging Claude transcript files. It has been three stores since this
PR (Claude's ~/.claude/projects, omp's ~/.omp/agent/sessions, codex's
~/.codex/sessions), the alias field keeps its Claude-era name without being
Claude-only, and the scanner-only rule behind resumeId was written down
nowhere.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>