fix(desktop): refresh sidebar after auto-title

[tt-a1i]

Summary

• emit a title-specific TUI gateway event after async auto-title generation persists a title
• patch Desktop sidebar session rows by runtime id, stored id, or compression lineage, then refresh/broadcast the session list
• only fire auto-title callbacks after set_session_title() confirms the title was stored

Fixes #47926. Related to #44810, but that backend-only PR emits session.info; the current Desktop sidebar does not patch title rows from that event, and _session_info() does not carry the title.

Testing

• $HOME/.hermes/hermes-agent/venv/bin/python -m pytest tests/agent/test_title_generator.py
• $HOME/.hermes/hermes-agent/venv/bin/python -m pytest tests/agent/test_title_generator.py tests/test_tui_gateway_server.py -k "title_callback or auto_title or session_title"
• npm --workspace apps/desktop run typecheck
• npm --workspace apps/desktop run test:ui -- src/store/session.test.ts -t applySessionTitleUpdate
• npm --workspace apps/desktop exec eslint -- --quiet src/store/session.ts src/store/session.test.ts src/app/session/hooks/use-message-stream.ts src/lib/chat-messages.ts
• git diff --check

Note: running the full src/store/session.test.ts file in this local jsdom setup still fails in pre-existing workspaceCwdForNewSession tests because window.localStorage is unavailable; the new applySessionTitleUpdate focused tests pass.

[teknium1]

Thanks for the focused Desktop/TUI investigation. An automated hermes-sweeper review found the reported sidebar-refresh behavior is already implemented on current main.

• tui_gateway/server.py:9259-9271 supplies maybe_auto_title() a callback that emits session.title with the stored session id and generated title; this path was introduced in 4e023f5bc990ac430d38a220c74162bbe92293f9.
• apps/desktop/src/app/session/hooks/use-message-stream/gateway-event.ts:358-367 consumes session.title and updates the matching sidebar row by durable id or compression lineage.
• This implementation is on main and is contained in release v2026.7.1.
• The linked issue Desktop sidebar does not refresh after async auto-title generation #47926 was already closed with the same current-main evidence.

Thank you for identifying the event-and-row-reconciliation path.