docs(19-02): complete register/remove app UI plan

- 19-02-SUMMARY.md created
- STATE.md: progress 100%, decisions, session updated
- ROADMAP.md: phase 19 marked complete
- REQUIREMENTS.md: APPREG-01, APPREG-04, APPREG-05 marked complete

.planning/phases/19-app-registration-removal/19-02-SUMMARY.md

@@ -0,0 +1,83 @@
+---
+phase: 19-app-registration-removal
+plan: "02"
+subsystem: ViewModels/UI
+tags: [app-registration, viewmodel, xaml, localization, unit-tests]
+dependency_graph:
+  requires: [19-01]
+  provides: [register-app-ui, remove-app-ui, fallback-instructions-panel]
+  affects: [ProfileManagementViewModel, ProfileManagementDialog, App.xaml.cs]
+tech_stack:
+  added: []
+  patterns: [IAsyncRelayCommand, ObservableProperty, BooleanToVisibilityConverter, TranslationSource]
+key_files:
+  created:
+    - SharepointToolbox.Tests/ViewModels/ProfileManagementViewModelRegistrationTests.cs
+  modified:
+    - SharepointToolbox/ViewModels/ProfileManagementViewModel.cs
+    - SharepointToolbox/Views/Dialogs/ProfileManagementDialog.xaml
+    - SharepointToolbox/Localization/Strings.resx
+    - SharepointToolbox/Localization/Strings.fr.resx
+    - SharepointToolbox/App.xaml.cs
+    - SharepointToolbox.Tests/ViewModels/ProfileManagementViewModelLogoTests.cs
+decisions:
+  - ProfileManagementViewModel constructor gains IAppRegistrationService as last param — existing logo tests updated to 5-param
+  - RegisterAppAsync/RemoveAppAsync use CancellationToken from IAsyncRelayCommand overload
+  - TranslationSource.Instance used directly in ViewModel for status strings (consistent with runtime locale switching)
+  - BooleanToVisibilityConverter declared in Window.Resources (WPF built-in, no custom converter needed)
+metrics:
+  duration: ~5 minutes
+  completed_date: "2026-04-09"
+  tasks_completed: 2
+  files_modified: 7
+---
+
+# Phase 19 Plan 02: Register/Remove App UI Summary
+
+Register and Remove app commands wired into ProfileManagementViewModel with fallback instructions panel, DI registration, EN/FR localization, and 7 passing unit tests.
+
+## Tasks Completed
+
+| # | Task | Commit | Status |
+|---|------|--------|--------|
+| 1 | ViewModel commands + DI + Localization | 42b5eda | Done |
+| 2 | Profile dialog XAML + ViewModel tests | 809ac86 | Done |
+
+## What Was Built
+
+**ProfileManagementViewModel** gained:
+- `IAppRegistrationService` constructor injection
+- `RegisterAppCommand` / `RemoveAppCommand` (IAsyncRelayCommand)
+- `IsRegistering`, `ShowFallbackInstructions`, `RegistrationStatus` observable properties
+- `HasRegisteredApp` computed property
+- `CanRegisterApp` / `CanRemoveApp` guards (profile selected, AppId null/non-null, not busy)
+- `RegisterAppAsync`: admin check → fallback panel or full registration → AppId persistence
+- `RemoveAppAsync`: app removal + MSAL clear + AppId null + persistence
+- `OnIsRegisteringChanged` partial: notifies both commands on busy state change
+
+**ProfileManagementDialog.xaml**:
+- Height 750 (was 620)
+- New Row 4: Register/Remove buttons, RegistrationStatus TextBlock, fallback instructions Border (6 steps)
+- `BooleanToVisibilityConverter` added to `Window.Resources`
+- Buttons row shifted from Row 4 to Row 5
+
+**Localization**: 16 new keys in both Strings.resx and Strings.fr.resx (register/remove/fallback flow, all accented FR characters).
+
+**App.xaml.cs**: `IAppRegistrationService` registered as singleton.
+
+**Tests**: 7 unit tests, all passing — CanExecute guards, fallback on non-admin, AppId set on success, AppId cleared on remove.
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 2 - Missing critical update] Updated ProfileManagementViewModelLogoTests to 5-param constructor**
+- **Found during:** Task 2
+- **Issue:** Existing logo tests used the 4-param constructor which no longer exists after adding IAppRegistrationService
+- **Fix:** Added `Mock<IAppRegistrationService>` field and passed `_mockAppReg.Object` as 5th param in all 3 constructor calls
+- **Files modified:** SharepointToolbox.Tests/ViewModels/ProfileManagementViewModelLogoTests.cs
+- **Commit:** 809ac86
+
+## Self-Check: PASSED
+
+All key files found. Both task commits verified (42b5eda, 809ac86). Full solution builds clean. 7/7 tests pass.