[Bug]: Composer autocomplete menus are clipped by glass host overflow

[Atchferox]

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/web and apps/desktop

Steps to reproduce

1. Run T3 Code Nightly 0.0.29-nightly.20260723.882.
2. Open a thread and focus the composer.
3. Type $ to open the skills picker.
4. Also try / for commands or @ for paths.

Expected behavior

Typing a supported trigger opens the composer autocomplete menu above the composer. If no items match, its empty state should still be visible.

Actual behavior

No autocomplete overlay is visible—not even the empty state. Trigger detection and provider skill discovery still work; the menu is rendered above the composer but clipped by an ancestor.

The current layout wraps ChatComposer in:

<div className="chat-composer-glass-host mx-auto w-full max-w-3xl overflow-hidden rounded-[22px]">

ComposerCommandMenu is rendered inside ChatComposer using an absolutely positioned wrapper above the input:

<div className="absolute inset-x-0 bottom-full z-20 mb-2">

Because the glass host has overflow-hidden, everything positioned above its bounds is clipped. This affects the shared $, /, and @ composer menu, rather than skill discovery specifically.

The clipping wrapper was introduced in fix(web): unify and tune glass surfaces.

Impact

The skills, commands, and path autocomplete UI is unavailable. Users must know and type exact skill or command names manually.

Version or commit

0.0.29-nightly.20260723.882

Regression introduced by 14b6bfdf157c0ce020a5a55e1c8d3d68552931ef.

Environment

macOS desktop app; Codex provider. Provider status successfully returned a non-empty enabled skill list.

Logs or stack traces

No runtime error is emitted; this is deterministic CSS clipping.

Suggested fix

Keep clipping on an inner element that owns only the rounded glass background, or render ComposerCommandMenu outside/through a portal so it is not a descendant of an overflow-hidden container.

A regression test should assert that the menu's visible bounds extend above the composer when typing $, /, or @.

Workaround

Type the exact $skill-name manually, or use a build from before the glass-host wrapper was added.

[eimexdev]

Seconded