feat: redesign mobile Config Profiles detail, preview, and edit pages

- Rewrite ConfigProfilesMobileView to match desktop functionality:
  full detail view with all fields, preview action showing resolved
  profile, and edit view with project/tool selects, includes,
  environment variables, runtime hints, files, mounts with nested
  files, and git mounts.
- Update useConfigProfiles.handleSubmit to return boolean success.
- Update ConfigProfilesPage to pass required state and callbacks.
- Add mobile-specific CSS for config profile forms, includes,
  mount/file cards, and preview panels.
- Allow MobileDetailView to render extra children.

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

Refs: openspec/changes/mobile-config-profiles-ui

apps/web/src/pages/.pi-map.md

@@ -4,9 +4,9 @@ dir: apps/web/src/pages
 index: apps/web/src/pages/.pi-map.index.md
 
 ## role
-Contains top-level page components that serve as route endpoints for the web application, each managing a distinct functional domain of the developer workspace platform.
+Contains top-level page components that render the main application screens for workspace management, project administration, Git operations, user settings, and terminal sessions.
 ## files
-- ConfigProfilesPage.tsx | Renders a responsive configuration profiles management page with sidebar list and editor panel for desktop, and a dedicated mobile view for creating, editing, and managing config profiles. | exp: ConfigProfilesPage | dep: react, ../components/data-states, ../hooks/use-mobile-viewport, ../hooks/use-config-profiles, ../components/features/config-profiles/ConfigProfileListSidebar, ../components/features/config-profiles/ConfigProfileEditorPanel, ../components/features/config-profiles/ConfigProfilesMobileView
+- ConfigProfilesPage.tsx | Renders a configuration profiles management page with responsive desktop/mobile layouts for creating, editing, previewing, and organizing config profiles. | exp: ConfigProfilesPage | dep: react, ../components/data-states, ../hooks/use-mobile-viewport, ../hooks/use-config-profiles, ../components/features/config-profiles/ConfigProfileListSidebar, ../components/features/config-profiles/ConfigProfileEditorPanel, ../components/features/config-profiles/ConfigProfilesMobileView, use-mobile-viewport, use-config-profiles, data-states, ConfigProfileListSidebar, ConfigProfileEditorPanel, ConfigProfilesMobileView
 - DashboardPage.test.tsx | Unit tests for the DashboardPage component verifying overview loading and error retry behavior | dep: @testing-library/jest-dom/vitest, @testing-library/react, react-router-dom, vitest, ./DashboardPage, ../state/sessions, DashboardPage, SessionsProvider
 - DashboardPage.tsx | Renders a dashboard homepage that displays workspace overview, active/recent sessions, summary statistics, and polling health checks for running instances. | exp: HomePage | dep: react, react-router-dom, ../api/dashboard, ../api/sessions, ../components/data-states, ../components/features/session/session-list, ../hooks/use-instance-actions, ../state/sessions
 - GitHistoryPage.tsx | Renders a Git commit history page with branch selection, commit list with graph visualization, and a detail panel showing commit metadata, stats, and diffs. | exp: GitHistoryPage | dep: react, react-router-dom, ../api/git-repositories, ../components/data-states, ../components/icon, ../hooks/use-async-data
@@ -25,9 +25,9 @@ Contains top-level page components that serve as route endpoints for the web app
 - WorkspaceDetailPage.tsx | Renders a workspace detail page with tab-based navigation for files, git, tools, and settings panels, with mobile-responsive layout. | exp: func:WorkspaceDetailPage(), call:useParams, call:useState, call:useMobileViewport, call:useWorkspaces, call:workspaces.find | dep: react, react-router-dom, ../hooks/use-workspaces, ../hooks/use-mobile-viewport, ../components/features/workspace/workspace-detail-header, ../components/features/workspace/workspace-tab-bar, ../components/features/workspace/workspace-file-panel, ../components/features/workspace/workspace-git-panel, ../components/features/workspace/workspace-tools-panel, ../components/features/workspace/workspace-settings-panel, use-workspaces, use-mobile-viewport, workspace-detail-header, workspace-tab-bar, workspace-file-panel, workspace-git-panel, workspace-tools-panel, workspace-settings-panel
 - WorkspacesPage.tsx | Renders a responsive workspaces management page with mobile and desktop views supporting listing, creating, viewing details, syncing, deleting, and starting tools for workspaces. | exp: func:WorkspacesPage(), call:useMobileViewport, call:useState, call:useWorkspaces, call:useWorkspaceActions, call:actions.delete, call:actions.sync, call:setMobileView, call:refresh, call:setStartWorkspace, call:handleDelete, call:setSelectedWorkspace, call:workspaces.map, call:e.stopPropagation, call:setShowCreate | dep: react, ../components/icon, ../hooks/use-mobile-viewport, ../hooks/use-workspaces, ../hooks/use-workspace-actions, ../components/features/workspace/workspace-card, ../components/features/workspace/workspace-create-form, ../components/features/mobile/mobile-detail-view, ../components/features/mobile/mobile-fab, ../components/features/tool/tool-starter, ../types/workspace
 ## arch
-Follows a page-based routing architecture with responsive mobile/desktop split layouts, heavy use of tabbed navigation and sidebar+editor panel patterns, polling-based real-time data updates, and CRUD-heavy container components with embedded API logic.
+Follows a page-based routing architecture with responsive mobile/desktop view splitting, tabbed navigation patterns, polling-based health checks, and CRUD operations backed by API hooks, with co-located test files.
 ## tags
-page, components, workspace, features, react, mobile, hooks, settings
+page, components, workspace, features, mobile, react, hooks, settings
 ## symbols
 - WorkspaceDetailPage
 - WorkspacesPage