feat: mobile tool workshop with list-detail pattern

- Add mobile viewport detection to ToolWorkshopPage
- Implement mobile list view with MobileListView component
- Implement mobile detail view with MobileDetailView component
- Implement mobile edit view with MobileEditView component
- Add MobileFAB for creating new tool types
- Fix IconName type issues in mobile components
- TypeScript check passes, build succeeds

openspec/changes/mobile-pages-overhaul/specs/mobile-navigation/spec.md

@@ -0,0 +1,16 @@
+## ADDED Requirements
+
+### Requirement: Bottom navigation grouping
+The mobile bottom navigation SHALL support grouping related pages under a single navigation item that opens a sub-menu.
+
+#### Scenario: Tools group navigation
+- **WHEN** user views the mobile bottom navigation
+- **THEN** a "Tools" item is visible that groups Tool Workshop and Config Profiles
+
+#### Scenario: Opening grouped menu
+- **WHEN** user taps a grouped navigation item
+- **THEN** a bottom sheet or menu opens showing the grouped pages
+
+#### Scenario: Active state for grouped items
+- **WHEN** user is on a page within a group
+- **THEN** the group's navigation item shows as active