v0.3.4

Added

• Collapsible sidebar groups driven by the shared Basalt sidebar template.

Changed

• Standardize every page shell: pages no longer add their own padding, centering
  or max width, use PageHeader and SectionRule for their titles and regions,
  and separate sections with the 24px layout gap.
• Adopt the Basalt sidebar header, rail and footer geometry, and render the
  account row with SidebarUser.
• Use LayerCard.Empty for the diagrams and Connect empty states.
• Upgrade @nocoo/basalt to 3.2.1, Wrangler to 4.152.0 with Workers types
  5.20261023.1, @types/node to 26.6.5, jsdom to 30.1.3,
  @testing-library/jest-dom to 7.0.1, chalk to 6.0.1,
  @hookform/resolvers to 6.0.0 and React Router to 8.5.0.
• Run the native TypeScript 7 compiler for typecheck and build, keeping the
  TypeScript 6 API available to typescript-eslint through
  @typescript/typescript6 until it supports TypeScript 7.