Benjamin Carlsson 86e17e98c7 Prepare TUI startup to accept multiple backend sessions (#56097) ...

## What changed

- Add `InitialBackendSessions` to carry the initial session and additional sessions into the TUI event loop. Existing launches continue to supply a single session.
- Shut down all supplied sessions on startup errors, cancellation, and early exits.
- Register the under-development `tui_multi_backend` feature flag, disabled by default, and expose it in the configuration schema.

## Testing

Add a regression test that fails bootstrap and verifies that both initial backends receive shutdown requests. Update multi-source event polling coverage to use the new initialization path.

GitOrigin-RevId: e5db439552de97594e6f13360b90be71256ab2f0

2026-10-22 06:32:01 +00:00

..

src

Prepare TUI startup to accept multiple backend sessions (#56097)

2026-10-22 06:32:01 +00:00

BUILD.bazel

build: run buildifier from just fmt (#28125)

2026-06-13 21:43:39 -07:00

Cargo.toml

Support remote agent message boards in multi-agent sessions (#49267)

2026-09-29 13:52:04 +00:00