feat: mobile edit-as-default with sticky save/delete actions

- Update MobileEditView to render Save and optional Delete in a
  sticky bottom action bar; header now shows Cancel + title only.
- Make ConfigProfilesMobileView open edit view on profile tap.
- Make ToolWorkshopMobileView open edit view on tool type tap.
- Wire delete into MobileEditView for existing profiles and tool
  types.
- Stay on edit view after saving an existing item; create flow
  returns to list as before.
- Update ToolWorkshopPage cancel to return to list.
- Add mobile-edit-actions and mobile-edit-delete CSS.

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

Refs: openspec/changes/mobile-edit-default-bottom-actions

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

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