[tmm]

Moves zbugs-gpui to zbugs-swift's macOS layout (apps/zbugs-swift/Sources/ZBugsUI/RootView.swift), so the three macOS apps share one structure:

• Sidebar (collapsible with the panel button): the filters as labeled rows, as Swift's grouped form. Status, Sort and Order come first, then the Created by Me and Assigned to Me switches when logged in. A second group holds GPUI's extra filters: Project, Creator, Assignee and Labels, with the same searchable pickers as before.
• List: a toolbar with "Open/Closed/All Issues", the count, the connection dot with its label (Connected, Connecting, Offline, Log In Again, Error), and icon buttons for a new issue, select-to-delete and the account menu. Rows show Swift's green circle or purple check, the title, and #id · creator · relative time with label chips, plus GPUI's unread dot.
• Detail: a toolbar with Close/Reopen, Edit and Delete icons and the search field at the window's end. Below it come the title, "Open by …", the metadata pickers, the label chips, the body, the comments and the comment box, in a column at most 760 pt wide.
• The toolbars replace the title bar: the window has a transparent title bar, and dragging a toolbar moves the window.
• The theme follows the system's light or dark appearance, live (Theme::sync_system_appearance on observe_window_appearance).

Five Lucide icons that GPUI Kit's default set lacks (circle, square-pen, pencil, list-checks, trash) come in through icon_assets!, with no new dependencies. Pixels and colors stay GPUI-native.

Swift (reference)

GPUI before

GPUI after

Dark, following the system:

Sidebar collapsed:

Status set to Closed, and Created by Me switched on:

Checked on macOS 27: cargo clippy with and without e2e, cargo test, and the CI end-to-end run (online, the database row check, and offline) all pass.