fix(web): 修复中等宽度下聊天栏信息重叠 (#151)

Co-authored-by: Yaowei Zheng <hiyouga@buaa.edu.cn>

changelog/unreleased/2026-08-03-chat-toolbar-layout.md

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+# Chat toolbar actions stay clear of live statistics
+
+At medium desktop widths, the pinned sidebar leaves the chat toolbar substantially narrower than the viewport breakpoint suggests. The Agents panel and Workspace actions now remain icon-only until the large-screen breakpoint, preserving space between the running indicator and the live Token, cost, and elapsed-time statistics; their labels return on wider screens, while titles and accessible names keep the compact buttons identifiable. A browser regression test reproduces the approximately 2:1 viewport from issue #150 and verifies that the running status and Token total never intersect.

changelog/unreleased/README.md

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 # Unreleased
 
+- [2026-08-03] Web App: medium-width chat toolbars keep the running indicator and live statistics separate by collapsing the Agents panel and Workspace actions to accessible icon-only buttons until the large-screen breakpoint. ([details](2026-08-03-chat-toolbar-layout.md))
+
 - [2026-08-06] Desktop app: penguin brand icons on every platform, task-completion system notifications (renderer-only, desktop sessions), explicit single-user mode (user/member management rejected with `desktop_single_user` and hidden), and a bundled `penguin` CLI on PATH (automatic on deb; menu-driven install elsewhere, no system Node needed). ([details](2026-08-06-desktop-app.md))
 
 - [2026-08-06] Admin "use system HTTP proxy" switch: server-wide proxy control (default on, live toggle, loopback exemption), off-state proxy-env stripping for agent subprocesses, OS-proxy injection on desktop. ([details](2026-08-06-system-proxy-switch.md))