feat: restore delete buttons in mobile list views and fix edit action bar

- Wire MobileListView onItemDelete/onItemDuplicate callbacks to render
  action buttons in each list row.
- Pass onItemDelete in ToolWorkshopMobileView list view.
- Add CSS for mobile-list-item-action buttons.
- Fix MobileEditView sticky bottom action bar that was hidden behind
  the 64px mobile navigation bar; raise to bottom: 64px and z-index 110.

Quality gates: npm run typecheck, npm run lint, npm test -- --run (87 passed)

Refs: openspec/changes/mobile-list-delete-button

apps/web/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: apps/web
 
 ## role
-Frontend web application providing the browser-based UI for the "headquarter" project, built with React/Vite/TypeScript and deployed via nginx.
+Frontend web application providing the browser-based user interface for the "headquarter" project, built as a modern React SPA with code editing, terminal, and routing capabilities.
 ## parent
 index: apps/.pi-map.index.md
 map: apps/.pi-map.md