chore: track all project map and index files

Add generated .pi-map.md and .pi-map.index.md files across the repository
so the project navigation maps are shared and versioned. These artifacts
are maintained by project_map_init/patch/validate and must be kept in
sync with source edits.

Note: .cache/ remains ignored (added in previous commit).

apps/web/src/components/features/mobile/.pi-map.index.md

@@ -0,0 +1,28 @@
+# apps/web/src/components/features/mobile (index)
+dir: apps/web/src/components/features/mobile
+
+## role
+Provides a complete set of mobile-optimized UI components for building responsive, touch-friendly interfaces across list views, detail views, forms, navigation, modals, and specialized terminal experiences.
+## parent
+index: apps/web/src/components/features/.pi-map.index.md
+map: apps/web/src/components/features/.pi-map.md
+## children
+-
+## files
+- mobile-action-sheet.tsx
+- mobile-detail-view.tsx
+- mobile-edit-view.tsx
+- mobile-fab.tsx
+- mobile-list-view.tsx
+- mobile-nav.tsx
+- mobile-page-header.tsx
+- mobile-terminal-header.tsx
+- mobile-terminal-wrapper.tsx
+## links
+index: apps/web/src/components/features/mobile/.pi-map.index.md
+map: apps/web/src/components/features/mobile/.pi-map.md
+## workflows
+- change mobile behavior
+  read: mobile-action-sheet.tsx, mobile-detail-view.tsx, mobile-edit-view.tsx
+## dirty
+-