feat: mobile Spaces nav and list-based project/workspace views

- Combine Projects and Workspaces into a single 'Spaces' grouped mobile
  nav item that opens a bottom-sheet menu.
- Add SpacesBottomSheet component with Projects/Workspaces options.
- Extend MobileListView with optional renderItem prop for rich rows.
- Redesign mobile ProjectsPage rows to show project description and
  repository chips.
- Replace mobile WorkspacesPage list with compact WorkspaceCard grid,
  matching desktop card content.
- Add mobile-list-* CSS and mobile-workspaces-list spacing.

Quality gates: npm run typecheck, npm run lint clean,
npm test -- --run 87 passed.

apps/.pi-map.md

@@ -4,10 +4,10 @@ dir: apps
 index: apps/.pi-map.index.md
 
 ## role
-Contains the main deployable application entry points and top-level configurations for the project.
+Contains the main executable application modules that serve as entry points for the project.
 ## files
 ## arch
-Monorepo-style directory structure typically housing multiple independent applications that share common libraries or modules, each with its own configuration and dependencies.
+Modular application structure with separate deployable units, likely following microservices or layered architecture patterns with domain-driven design boundaries.
 ## tags
 -
 ## symbols