A /title typed before any message in a fresh desktop chat could be silently
lost: the session DB row is deferred to the first prompt, so session.title
found no row, only stashed pending_title, and returned pending:true. It then
relied on a post-turn apply block to write the title. When that turn never
landed under the same session_key (or the apply path didn't fire), the title
was dropped and the sidebar fell back to the first-message preview — e.g.
"/title my-custom-name" then "hello" left the session titled "hello".
Mirror the messaging gateway's _handle_title_command: an explicit /title is
clear user intent, not an abandoned draft, so create the row up front
(_ensure_session_db_row) and set the title immediately via the profile-aware
_session_db handle, returning pending:false. This also fixes the frontend
symptom for free — the desktop handler's immediate refreshSessions() now pulls
the correct persisted title instead of clobbering the optimistic value with a
still-NULL row.
If row creation can't take (DB unavailable / racing writer), fall back to the
existing pending_title queue so the post-turn apply block remains a recovery
path. The sidebar's min-messages filter keeps a titled 0-message row hidden, so
a /title'd-but-never-used draft still doesn't clutter the list.
Updates the test that asserted the old queue-on-missing-row behavior and adds a
fallback-to-queue regression test.
Co-authored-by: Teknium <127238744+teknium1@users.noreply.github.com>
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