[Bug]: Expanded message queue is hard to scan with around 20 queued messages #25952

The expanded queue is hard to scan with around 20 queued messages. Long messages occupy full chat bubbles, so finding a particular queued request requires scrolling through a large amount of text.

Reproduction

1. Queue around 20 messages, including several with multiple paragraphs.
2. Select "Show all".
3. Try to locate and read an individual queued message.

The expanded view should make the queue easy to scan while keeping each message's full text accessible.

Code and release status

QueuedRunsControl renders every expanded message in full. The expanded list has no height limit. That behavior remains in nightly 20261027.3770 and main dc84b0962e.

In an isolated 20-message browser fixture, the expanded list occupied 3,548 px. The proposed fix uses numbered, two-line previews in a bounded list. Each message can expand independently to reveal its full text. The same fixture uses a 400 px list at an 800 px viewport height.

The connected server is v0.1.2 on Ubuntu 24.04.5 x86_64. The reporter's browser client build and browser version remain unknown. The fixture uses current source in T3's isolated Browser panel.

Implementation PR: #26026. The change is proposed and has not shipped.