Sidebar 12 block design & features
Sidebar12 is a three-column shell built with shadcn/ui. The left rail is a full app sidebar: workspace switcher, search, grouped links with nested projects, and a user footer. The center is the usual breadcrumb header and muted canvas. The right rail is a sticky, non-collapsing panel titled Dashboard. It lists compact metric keys under Metrics, Revenue, Users, and Events, with labels such as overview, page_views, mrr, and cohorts.
The left rail uses standard icon rows and section labels. The right rail is denser and text-only: tiny uppercase headings, muted single-line keys, and a hairline border on its inner edge. Active keys sit on a muted chip. The contrast in density is the main visual cue.
The overall feel is an analytics console rather than a generic dashboard. Dual rails are less common than a single nav column, and the underscore-style metric keys push it toward a technical product. This is an elaborate, content-driven block. You need a real app tree on the left and a believable metrics taxonomy on the right.
The metrics panel hides below large breakpoints, leaving the left rail and the center canvas.