docs(14-02): complete directory browse UI plan

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/phases/14-user-directory-view/14-02-SUMMARY.md

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+---
+phase: 14-user-directory-view
+plan: 02
+subsystem: ui
+tags: [wpf, xaml, datagrid, radio-button, data-trigger, directory-browse]
+
+requires:
+  - phase: 14-user-directory-view/01
+    provides: "Code-behind handler DirectoryDataGrid_MouseDoubleClick and localization keys"
+  - phase: 13-user-directory-data
+    provides: "ViewModel properties: IsBrowseMode, DirectoryUsersView, LoadDirectoryCommand, etc."
+provides:
+  - "Complete directory browse UI in UserAccessAuditView with mode toggle, DataGrid, and loading UX"
+  - "Mode switching between search and browse panels"
+  - "Guest user highlighting in directory DataGrid"
+affects: [user-directory-view]
+
+tech-stack:
+  added: []
+  patterns: ["DataTrigger inverse visibility for mode-conditional panels", "Shared SelectedUsers section visible across modes"]
+
+key-files:
+  created: []
+  modified: ["SharepointToolbox/Views/Tabs/UserAccessAuditView.xaml"]
+
+key-decisions:
+  - "Used DataTrigger inverse visibility for search panel instead of ConverterParameter=Inverse (more reliable in WPF)"
+  - "Used plain English DataGrid column headers instead of localized bindings (DataGridTextColumn.Header binding is unreliable)"
+  - "GroupBox.Header uses nested TextBlock for localized binding compatibility with GroupBox.Style"
+
+patterns-established:
+  - "DataTrigger inverse visibility: Style with default Visible, DataTrigger sets Collapsed on true"
+  - "Mode-conditional panels: search/browse GroupBoxes with opposite visibility triggers"
+
+requirements-completed: [UDIR-05, UDIR-01]
+
+duration: 2min
+completed: 2026-04-09
+---
+
+# Phase 14 Plan 02: Directory Browse UI Summary
+
+**Full directory browse mode UI with mode toggle RadioButtons, 5-column DataGrid, loading status, guest highlighting, and shared SelectedUsers section**
+
+## Performance
+
+- **Duration:** 2 min
+- **Started:** 2026-04-09T07:28:21Z
+- **Completed:** 2026-04-09T07:30:10Z
+- **Tasks:** 1
+- **Files modified:** 1
+
+## Accomplishments
+- Mode toggle (Search/Browse Directory) RadioButtons at top of left panel with InverseBoolConverter binding
+- Search panel collapses when IsBrowseMode=true via DataTrigger approach; Browse panel shows via BoolToVisibilityConverter
+- Directory panel with Load/Cancel buttons, IncludeGuests checkbox, filter TextBox, status/count display
+- DataGrid with 5 columns (Name, Email, Department, Job Title, Type) bound to DirectoryUsersView
+- Guest users highlighted in orange (#F39C12) with SemiBold font weight via DataTrigger on UserType
+- SelectedUsers ItemsControl extracted from search GroupBox to shared section visible in both modes
+- Scan Options and Run/Export buttons remain always visible in both modes
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Restructure left panel with mode toggle and conditional panels** - `1a1e83c` (feat)
+
+## Files Created/Modified
+- `SharepointToolbox/Views/Tabs/UserAccessAuditView.xaml` - Added mode toggle, browse panel with DataGrid, extracted SelectedUsers to shared section
+
+## Decisions Made
+- Used DataTrigger inverse visibility for search panel (Visible by default, Collapsed when IsBrowseMode=True) instead of ConverterParameter=Inverse -- more reliable across WPF versions
+- Used plain English strings for DataGrid column headers ("Name", "Email", "Department", "Job Title", "Type") instead of localized bindings -- DataGridTextColumn.Header does not reliably support binding in standard WPF
+- Moved GroupBox.Header to nested TextBlock element for search panel to avoid conflict between inline Header binding and GroupBox.Style on the same element
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+None.
+
+## User Setup Required
+None - no external service configuration required.
+
+## Next Phase Readiness
+- Phase 14 is now complete (both plans executed)
+- All directory browse UI elements are wired to ViewModel properties from Phase 13
+- Manual testing recommended to verify visual layout, mode switching, DataGrid scrolling, and double-click selection
+
+---
+*Phase: 14-user-directory-view*
+*Completed: 2026-04-09*
+
+## Self-Check: PASSED