docs(04-08): complete TransferViewModel + TransferView plan

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/phases/04-bulk-operations-and-provisioning/04-08-SUMMARY.md

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+---
+phase: 04-bulk-operations-and-provisioning
+plan: 08
+subsystem: ui
+tags: [wpf, mvvm, viewmodel, view, xaml, filetransfer, csharp, converters]
+
+requires:
+  - phase: 04-03
+    provides: FileTransferService implementing IFileTransferService
+  - phase: 04-07
+    provides: ConfirmBulkOperationDialog, FolderBrowserDialog, SitePickerDialog, localization keys for transfer.*
+
+provides:
+  - TransferViewModel with source/dest selection, transfer mode, conflict policy, progress, per-item results, CSV export of failed items
+  - TransferView.xaml + TransferView.xaml.cs — WPF UserControl for the file transfer tab
+  - EnumBoolConverter and StringToVisibilityConverter added to converters file
+  - IFileTransferService, BulkResultCsvExportService, TransferViewModel, TransferView registered in DI
+
+affects:
+  - 04-09
+  - 04-10
+  - MainWindow (tab wiring)
+
+tech-stack:
+  added: []
+  patterns:
+    - TransferViewModel follows FeatureViewModelBase override pattern (RunOperationAsync, OnTenantSwitched)
+    - Dialog factories as Func<> set by code-behind to keep ViewModel testable
+    - SitePickerDialog.SelectedUrls.FirstOrDefault() for single-site transfer selection
+    - EnumBoolConverter for RadioButton binding to enum properties
+
+key-files:
+  created:
+    - SharepointToolbox/ViewModels/Tabs/TransferViewModel.cs
+    - SharepointToolbox/Views/Tabs/TransferView.xaml
+    - SharepointToolbox/Views/Tabs/TransferView.xaml.cs
+  modified:
+    - SharepointToolbox/Views/Converters/IndentConverter.cs
+    - SharepointToolbox/App.xaml
+    - SharepointToolbox/App.xaml.cs
+
+key-decisions:
+  - "SitePickerDialog returns SelectedUrls (list); TransferView uses .FirstOrDefault() for single-site transfer — avoids new dialog variant while reusing existing dialog"
+  - "EnumBoolConverter and StringToVisibilityConverter added to existing IndentConverter.cs — keeps converter classes co-located as project convention"
+  - "TransferViewModel exposes CurrentProfile publicly — required by code-behind to build per-site TenantProfile for FolderBrowserDialog"
+
+patterns-established:
+  - "EnumBoolConverter: ConverterParameter=EnumValueName for RadioButton-to-enum binding (reusable for other enum properties in future ViewModels)"
+
+requirements-completed:
+  - BULK-01
+  - BULK-04
+  - BULK-05
+
+duration: 20min
+completed: 2026-04-03
+---
+
+# Phase 04 Plan 08: TransferViewModel + TransferView Summary
+
+**WPF file transfer tab with source/dest site+folder browser, Copy/Move mode, conflict policy, confirmation dialog, per-item result reporting, and failed-items CSV export**
+
+## Performance
+
+- **Duration:** 20 min
+- **Started:** 2026-04-03T10:00:00Z
+- **Completed:** 2026-04-03T10:20:00Z
+- **Tasks:** 2
+- **Files modified:** 6
+
+## Accomplishments
+
+- TransferViewModel wires IFileTransferService.TransferAsync with source and dest contexts acquired from ISessionManager, progress reporting, cancellation, and failed-items export via BulkResultCsvExportService
+- TransferView provides a left-panel layout with source/dest GroupBoxes (site URL + browse button + library/folder display), Copy/Move radio buttons, conflict policy ComboBox (Skip/Overwrite/Rename), start/cancel buttons, progress bar, result summary, and Export Failed Items button
+- Added EnumBoolConverter (for RadioButton binding) and StringToVisibilityConverter (for result summary visibility) to the converters file; registered both in App.xaml resources
+- Registered IFileTransferService, BulkResultCsvExportService, TransferViewModel, TransferView in App.xaml.cs DI container
+
+## Task Commits
+
+1. **Tasks 1 + 2: TransferViewModel + TransferView** - `7b78b19` (feat)
+
+## Files Created/Modified
+
+- `SharepointToolbox/ViewModels/Tabs/TransferViewModel.cs` — ViewModel with source/dest properties, RunOperationAsync calling TransferAsync, ExportFailedAsync
+- `SharepointToolbox/Views/Tabs/TransferView.xaml` — UserControl XAML with DockPanel layout
+- `SharepointToolbox/Views/Tabs/TransferView.xaml.cs` — Code-behind wiring SitePickerDialog + FolderBrowserDialog factories, confirm dialog
+- `SharepointToolbox/Views/Converters/IndentConverter.cs` — Added EnumBoolConverter, StringToVisibilityConverter
+- `SharepointToolbox/App.xaml` — Registered EnumBoolConverter, StringToVisibilityConverter, ListToStringConverter (added by linter) as static resources
+- `SharepointToolbox/App.xaml.cs` — Registered IFileTransferService, BulkResultCsvExportService, TransferViewModel, TransferView
+
+## Decisions Made
+
+- SitePickerDialog.SelectedUrls is a list (multi-site); used `.FirstOrDefault()` in TransferView code-behind to get the single selected site for transfer — avoids creating a new single-site variant of SitePickerDialog while reusing the established pattern.
+- EnumBoolConverter added alongside existing converters in IndentConverter.cs rather than a separate file, consistent with project file convention (BytesConverter, InverseBoolConverter are also in that file).
+- TransferViewModel.CurrentProfile is a public read-only property (same pattern as StorageViewModel) so the code-behind can build site-specific TenantProfile for FolderBrowserDialog acquisition.
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 1 - Bug] Adapted SitePickerDialog usage — SelectedSite vs SelectedUrls**
+- **Found during:** Task 2 (TransferView code-behind)
+- **Issue:** Plan referenced `sitePicker.SelectedSite` (singular property), but actual SitePickerDialog exposes `SelectedUrls` (IReadOnlyList<SiteInfo>). No SelectedSite property exists.
+- **Fix:** Used `sitePicker.SelectedUrls.FirstOrDefault()` in both BrowseSource_Click and BrowseDest_Click to pick the first (or only) user selection.
+- **Files modified:** SharepointToolbox/Views/Tabs/TransferView.xaml.cs
+- **Verification:** Build passes with 0 errors.
+- **Committed in:** 7b78b19
+
+**2. [Rule 3 - Blocking] Added missing EnumBoolConverter and StringToVisibilityConverter**
+- **Found during:** Task 2 (TransferView XAML used these converters)
+- **Issue:** Plan noted converters may be missing and instructed to create them. EnumBoolConverter and StringToVisibilityConverter were not in the project.
+- **Fix:** Added both converter classes to IndentConverter.cs and registered them in App.xaml.
+- **Files modified:** SharepointToolbox/Views/Converters/IndentConverter.cs, SharepointToolbox/App.xaml
+- **Verification:** Build passes with 0 errors; converters accessible in App.xaml.
+- **Committed in:** 7b78b19
+
+---
+
+**Total deviations:** 2 auto-fixed (1 bug/API mismatch, 1 missing critical converters)
+**Impact on plan:** Both fixes were explicitly anticipated in plan notes. No scope creep.
+
+## Issues Encountered
+
+- Linter auto-created a ListToStringConverter x:Key reference in App.xaml — corresponding class was added to IndentConverter.cs to satisfy the build (0 errors confirmed).
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- TransferViewModel and TransferView are ready; must be wired into MainWindow as a tab (Plan 04-09 or 04-10).
+- IFileTransferService and all DI registrations are complete; TransferView can be resolved from the DI container.
+
+---
+*Phase: 04-bulk-operations-and-provisioning*
+*Completed: 2026-04-03*