Studio chrome: acceptFirstMouse for frameless windows on macOS (all apps)

[ElbertePlinio]

Goal

On macOS, frameless windows should set acceptFirstMouse so the first click on an inactive window reaches the custom titlebar controls/drag region instead of only focusing the window.

Raised by Codex review on pickforge/pickgauge#20 (P3). None of the three apps set it today — including PickForge, the chrome reference — so behavior is at least consistent, but the macOS ergonomics are worse than native.

Checklist

• Verify desired behavior on real macOS (first-click-through vs focus-only is a UX choice; native macOS titlebars accept first click for controls)
• If confirmed: set acceptFirstMouse: true on the main window in pickforge, pickscribe, pickgauge (tauri.conf.json + any runtime WebviewWindowBuilder)
• Document the setting in the studio chrome adoption recipe

Source: pickforge/pickgauge#20 review round 2

Current status: Planned
Next action: verify on macOS hardware