Benjamin Carlsson 82e6bacb9c Enable model and reasoning effort selection for Cloud conversations (#60651) ...

## Why

Cloud conversations previously used the model returned on activation without exposing model discovery or supporting model changes from the TUI.

## What changed

- Fetch the account-scoped Cloud catalog on demand through `/v2/models`, independently of the submission and attachment queue.
- Let users stage a supported model and reasoning effort for the next new turn in the current conversation. Send these settings with the user message and show acceptance after successful admission.
- Show a loading picker when the catalog is empty, preserve compatibility with Cloud servers that lack discovery, and discard stale catalog results and selections when the account changes.

## Testing

Add coverage for catalog request parameters and queue bypass, deferred discovery and compatibility, model and effort serialization, admission outcomes, account invalidation, and opening the picker after discovery.

GitOrigin-RevId: 2cd0e7fe5f760d4da9258eefe9f0dcbcd23f9b07

2026-11-10 19:52:49 +00:00

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attach.rs

Enable model and reasoning effort selection for Cloud conversations (#60651)

2026-11-10 19:52:49 +00:00