cmux-next: align composer context and effort controls

[teamleaderleo]

The composer model control now sits before the context ring, the effort detail is a small-radius rectangle with 8px separation, and Trust asks no longer expose a hover folder preview.

Validation:

• Added focused context order and trust tooltip coverage
• git diff --check passed
• Native validation is through CI and fleet

Changelog

Changed: align composer context and effort controls for a stable compact bar.

🤖 Generated with Claude Code

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Summary by cubic

Aligns the composer bar's context and effort controls for a stable compact layout: the model chip now sits before the context ring, effort detail renders as a small rounded rectangle, and Trust asks no longer expose a folder tooltip on hover. The agent pane bundle is regenerated to match.

• Added coverage for the chip order relative to the context ring and for the absent Trust-ask folder tooltip.

^{Written for commit 15e808f. Summary will update on new commits.}

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[github-actions]

Unclear: web / react-apps-check failed: no known signature; failed step: Test webviews.

CI failed on 15e808f11e (run 37551843700 attempt 1): 1 unknown.
macOS jobs did not run: compile and app tests were skipped: Fast static checks skipped.

Job	Verdict	Why
web / react-apps-check	unknown	no known signature; failed step: Test webviews

Not re-run automatically: web / react-apps-check is not a machine failure.

Written by scripts/ci/classify_failures.py (ci-failure-attribution.yml); signatures are its SIGNATURES table. A machine verdict is the runner's fault, not this PR's; yours means the failing file is one this PR changes, also red on main that main's latest full suite fails the same way, seen on other PRs that it failed on another pull request's run lately.

[teamleaderleo]

CI attribution for the exact-head Swift test red: withTheSidebarHiddenTheStripStartsAfterTheToggle fails in StaticSidebarToggleTests.swift:95 on this PR at 52a61907e2d. The same test fails on the current feat-cmux-next base 29371b1fd54 in run 37545413691, with the same strip/toggle geometry assertion. This is base-owned and unrelated to the composer controls changes.

[teamleaderleo]

Exact-head CI audit for 5667fc806aa on base 8096756a8d2:

• Release compile and generated files passed on the exact head.
• withTheSidebarHiddenTheStripStartsAfterTheToggle fails at StaticSidebarToggleTests.swift:95, the same base-owned geometry failure documented from base run https://github.com/manaflow-ai/cmux/actions/runs/37545413691/job/112556590156.
• revealTurnAsksThePageToScrollToTheTurn fails at AgentPaneActionTests.swift:75. This is in the agent-pane area changed by base commits between 29371b1fd54 and 8096756a8d2 (b3f6b60cbf5, 21936ef54a2, f3b8f4f7ed1, 9025f514b60, b0da162df35), and the composer controls diff does not touch that area.

The exact-head Swift job log is https://github.com/manaflow-ai/cmux/actions/runs/37549024133/job/112560008924. This comment is the audit record for the exact-head override check.

[teamleaderleo]

Exact-head CI audit for 15e808f11ef on base 4764d5d6265:

• Release compile and generated files passed on the exact head.
• withTheSidebarHiddenTheStripStartsAfterTheToggle fails at StaticSidebarToggleTests.swift:95, the same base-owned geometry failure documented from base run https://github.com/manaflow-ai/cmux/actions/runs/37545413691/job/112556590156.
• Swift log: https://github.com/manaflow-ai/cmux/actions/runs/37551843628/job/112573409055

The controls diff does not touch the sidebar test area. This comment is the audit record for the exact-head override check.

[teamleaderleo]

merge-override: Exact-head Release passed; Swift red is the documented base-owned sidebar geometry failure.

[teamleaderleo]

merge-override: Exact-head Release passed; Swift red is the documented base-owned sidebar geometry failure.

[github-actions]

The feat-cmux-next push run https://github.com/manaflow-ai/cmux/actions/runs/37555112268 at 2df79b5 failed: cmux-next checks (god files, concurrency, crash safety, l10n).
Those jobs last passed at d7167cb. This pull request is one of 3 merged since: #18115, #17630, #17635.
If the failure is in your change, fix forward on feat-cmux-next. Pull requests run only the tiers their paths reach (docs/ci/cmux-next-tiers.md); label a batch PR full-ci to run them all before merging.

[github-actions]

The feat-cmux-next push run https://github.com/manaflow-ai/cmux/actions/runs/37555118221 at ea3879d failed: cmux-next checks (god files, concurrency, crash safety, l10n).
Those jobs last passed at d7167cb. This pull request is one of 4 merged since: #18115, #17630, #17635, #17535.
If the failure is in your change, fix forward on feat-cmux-next. Pull requests run only the tiers their paths reach (docs/ci/cmux-next-tiers.md); label a batch PR full-ci to run them all before merging.