Convert the bar from a vertical left-edge strip to a horizontal top bar. The
shell had no orientation abstraction, so this flips the geometry across the bar
and the drawer/region/interaction layer:
- Bar.qml: ColumnLayout -> RowLayout; hit-testing (checkPopout/handleWheel),
scroll halves and popout-center anchoring all keyed off x instead of y;
first/last padding -> left/right margins.
- BarWrapper.qml: the bar's "thickness" is now its height (clampedHeight/
contentHeight/implicitHeight); content anchors left/right/top.
- drawers: Exclusions (exclusive zone moved left->top), Panels (content inset
topMargin = bar height), Regions + ContentWindow (panel->window coordinate
mapping and the thick border flip left->top), Interactions (bar-region check
y<barHeight, panel Y-origin uses bar height, scroll passes x, bar drag-reveal
is vertical).
- widgets: Clock (Row, HH:MM with a colon), StatusIcons (Row), Workspaces +
Workspace (Row), Tray (Row, expand chevron at the right) — each sizes to the
bar height instead of width.
Verified live in the dev VM: top bar renders with centered-clock entries, the
exclusion zone keeps windows below the bar, and the dashboard drops down
correctly. Popout fly-outs still anchor sideways (Phase B).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
