Show a title hint in /resume instead of a raw session UUID - #125
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F-RESUME-01: the bare /resume list previously showed only a raw UUID
and timestamp per session ("674c91ce-f154-4903-9281-80a99b28384a ·
2026-08-02 08:13"), giving no way to tell sessions apart without
opening each one.
Adds forge_core::session_title_hint(), which cheaply opens and replays
just one session's journal (no live AgentSession/tools/model needed)
to pull its first user message as a short title. /resume now shows
that title when available, falling back to the id/timestamp only if
the journal can't be read.
Covered by a new end-to-end test creating a real prior session,
appending a user message, and asserting the picker shows it.
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Summary
Fixes F-RESUME-01 from the beta-readiness audit: the bare
/resumelist showed only a raw UUID and timestamp per session (e.g.674c91ce-f154-4903-9281-80a99b28384a · 2026-08-02 08:13), giving no way to tell sessions apart without opening each one.forge_core::session_title_hint()— cheaply opens and replays just one session's journal (independent of any liveAgentSession, no tools/model/governance needed) to pull its first user message as a short title./resumenow shows that title when available, falling back to id/timestamp only if the journal can't be read (never fails the whole listing over one unreadable session).Not included
Two visual findings from the same audit (a light-theme rendering artifact and an intermittent approval-button label) remain open — both root-caused (in this and a prior PR) to the terminal-output rendering layer rather than Forge's own style/buffer computation, which needs deeper escape-sequence-level debugging out of scope here.
Test plan
/resumein a fresh session sharing the same journal dir, asserts the picker item's title matchescargo test -p forge-tui --lib— 683 passedcargo test -p forge-core --lib— 130 passedcargo fmt --all -- --check— cleancargo build --release --locked --package forge-cli— clean, 0 warnings