[Broccolito]

The composer now has one borderless “Tools” button with no visible count. Its tooltip gives the enabled total and separate extension, skill, and knowledge-base counts; clicking opens the existing lists. The tooltip and accessible name retain atomic loading and first-send count behavior.

The model menu puts Quick, Normal, and Deep inside a shared segmented control with a sliding selection. Choices apply immediately, keep the menu open, and support keyboard navigation. Biorouter Copilot uses a smaller warm-charcoal pointer with a short tail and subtle light edge, preserving the native hotspot.

Validation:

• just check-everything passed, including Rust formatting, strict Clippy, schema/brand/naming checks, and registry checks. UI lint/typecheck/theme/contrast/token checks passed again after the final Tools revision.
• 104 focused UI tests passed, including Chromium geometry, keyboard navigation, first-send count continuity, hover totals, and one-row layout at 760px, 440px, and 360px pane widths. One opt-in screenshot test was skipped.
• All 22 computer-use packaging tests passed, including emitted PNG geometry, transparency, antialiasing, neutral contrast, and hotspot checks.
• Inspected the actual Electron app in all six theme/mode combinations. Exercised the three tool lists, independent toggles, reload persistence, and effort selection with pointer and keyboard in an isolated development profile.
• Verified the staged native helper payload and cursor resource. A safe native fixture click changed its counter from 0 to 1; overlay observations confirmed moving → idle → hidden and normal cleanup. Cursor artwork was visually reviewed on light/dark surfaces. A live overlay screenshot was unavailable through the capture tool’s per-window crop.