[Desktop] Streaming count labels animate layout properties (grid-template-columns / width)

Description

During streaming, the tool count summary animates grid-template-columns for 480ms and AnimatedNumber animates width for 560ms. Both are layout properties, so every count/status change (several per second while tools run) forces layout each frame in the tool rows.

• packages/session-ui/src/components/tool-count-summary.css:15 and :40 — transition-property: grid-template-columns, …
• packages/ui/src/components/animated-number.css:16 — transition: width … 560ms

These could stop transitioning the layout properties and keep only opacity/filter/transform.

Plugins

none

OpenCode version

OpenCode Desktop 1.18.29

Steps to reproduce

1. Open a session and run a turn with several tool calls
2. Watch the tool count summary/numbers in the timeline (or profile with DevTools Performance)
3. Layout runs each frame for ~0.5s on every count change

Screenshot and/or share link

No screenshot — motion/layout issue, no visual difference at rest.

Operating System

CachyOS (Arch Linux), KDE Plasma 6.7.5, Wayland

Terminal

n/a (desktop app)