- Create Views/Tabs/SettingsView.xaml (UserControl with language ComboBox en/fr, DataFolder TextBox and Browse button using TranslationSource)
- Create Views/Tabs/SettingsView.xaml.cs (DI constructor injection of SettingsViewModel, LoadAsync on Loaded)
- Update MainWindow.xaml to add xmlns:views namespace and clear placeholder TextBlock from SettingsTabItem
- Register SettingsView as Transient in DI; resolve and set as SettingsTabItem.Content from MainWindow constructor
- All 42 unit tests pass, 0 build errors
- Create Views/Dialogs/ProfileManagementDialog.xaml (modal Window with Name/TenantUrl/ClientId fields and TranslationSource bindings)
- Create Views/Dialogs/ProfileManagementDialog.xaml.cs (DI constructor injection, LoadAsync on Loaded)
- Add OpenProfileManagementDialog factory delegate to MainWindowViewModel
- Wire ManageProfilesCommand to open dialog via factory, reload profiles after close
- Register ProfileManagementDialog as Transient in DI (App.xaml.cs)
- Inject IServiceProvider into MainWindow constructor for DI-resolved dialog factory
- SessionManager owns all ClientContexts; callers must not store references
- IsAuthenticated(tenantUrl) returns false before auth, true after GetOrCreateContextAsync
- ClearSessionAsync disposes ClientContext and removes state (idempotent for unknown tenants)
- GetOrCreateContextAsync validates null/empty TenantUrl and ClientId (ArgumentException)
- MsalClientFactory.GetCacheHelper() added — exposes helper for PnP tokenCacheCallback wiring
- 8 unit tests pass, 1 interactive-login test skipped (integration-only)
- LoggingIntegrationTests: verifies Serilog writes rolling log file with correct content
- LogPanelSink structural smoke test: confirms type implements ILogEventSink
- App.xaml.cs: added comment for LogPanelSink DI registration deferred to plan 01-06
- SharePointPaginationHelper: async iterator with ListItemCollectionPosition loop (bypasses 5k limit); RowLimit=2000; [EnumeratorCancellation] for correct WithCancellation support
- ExecuteQueryRetryHelper: exponential backoff on 429/503/throttle; surfaces retry events via IProgress<OperationProgress>; max 5 retries
- LogPanelSink: custom Serilog ILogEventSink writing color-coded entries to RichTextBox via Dispatcher.InvokeAsync for thread safety
