docs(01-02): complete core models and helpers plan — SUMMARY, STATE, ROADMAP updated

- 01-02-SUMMARY.md created with 7 files, 2 tasks, 1 auto-fix deviation
- STATE.md: progress 25% (2/8 plans), 2 new decisions added
- ROADMAP.md: phase 1 updated (2/8 summaries, In Progress)
- REQUIREMENTS.md: FOUND-05/06/07/08 marked complete

.planning/REQUIREMENTS.md

@@ -13,10 +13,10 @@ Requirements for initial release. Each maps to roadmap phases.
 - [ ] **FOUND-02**: Multi-tenant profile registry — user can create, rename, delete, and switch between tenant profiles (tenant URL, client ID, display name)
 - [ ] **FOUND-03**: Multi-tenant session caching — user stays authenticated across tenant switches without re-logging in (MSAL token cache per tenant)
 - [ ] **FOUND-04**: Interactive Azure AD OAuth login via browser — no client secrets or certificates stored
-- [ ] **FOUND-05**: All long-running operations report progress to the UI in real-time
+- [x] **FOUND-05**: All long-running operations report progress to the UI in real-time
-- [ ] **FOUND-06**: User can cancel any long-running operation mid-execution
+- [x] **FOUND-06**: User can cancel any long-running operation mid-execution
-- [ ] **FOUND-07**: All errors surface to the user with actionable messages — no silent failures
+- [x] **FOUND-07**: All errors surface to the user with actionable messages — no silent failures
-- [ ] **FOUND-08**: Structured logging for diagnostics (Serilog or equivalent)
+- [x] **FOUND-08**: Structured logging for diagnostics (Serilog or equivalent)
 - [ ] **FOUND-09**: Localization system supporting English and French with dynamic language switching
 - [ ] **FOUND-10**: JSON-based local storage for profiles, settings, and templates (compatible with current app's format for migration)
 - [ ] **FOUND-11**: Self-contained single EXE distribution — no .NET runtime dependency for end users
@@ -119,10 +119,10 @@ Which phases cover which requirements. Updated during roadmap creation.
 | FOUND-02 | Phase 1 | Pending |
 | FOUND-03 | Phase 1 | Pending |
 | FOUND-04 | Phase 1 | Pending |
-| FOUND-05 | Phase 1 | Pending |
+| FOUND-05 | Phase 1 | Complete |
-| FOUND-06 | Phase 1 | Pending |
+| FOUND-06 | Phase 1 | Complete |
-| FOUND-07 | Phase 1 | Pending |
+| FOUND-07 | Phase 1 | Complete |
-| FOUND-08 | Phase 1 | Pending |
+| FOUND-08 | Phase 1 | Complete |
 | FOUND-09 | Phase 1 | Pending |
 | FOUND-10 | Phase 1 | Pending |
 | FOUND-11 | Phase 5 | Pending |

.planning/ROADMAP.md

@@ -104,7 +104,7 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5
 
 | Phase | Plans Complete | Status | Completed |
 |-------|----------------|--------|-----------|
-| 1. Foundation | 1/8 | In Progress|  |
+| 1. Foundation | 2/8 | In Progress|  |
 | 2. Permissions | 0/? | Not started | - |
 | 3. Storage and File Operations | 0/? | Not started | - |
 | 4. Bulk Operations and Provisioning | 0/? | Not started | - |

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: planning
-stopped_at: Completed 01-foundation-01-PLAN.md
+stopped_at: Completed 01-foundation-02-PLAN.md
-last_updated: "2026-04-02T10:04:03.489Z"
+last_updated: "2026-04-02T10:07:59.501Z"
 last_activity: 2026-04-02 — Roadmap created, requirements mapped, all 42 v1 requirements assigned to phases
 progress:
   total_phases: 5
   completed_phases: 0
   total_plans: 8
-  completed_plans: 1
+  completed_plans: 2
   percent: 13
 ---
 
@@ -51,6 +51,7 @@ Progress: [█░░░░░░░░░] 13%
 
 *Updated after each plan completion*
 | Phase 01-foundation P01 | 4 | 2 tasks | 14 files |
+| Phase 01-foundation P02 | 1 | 2 tasks | 7 files |
 
 ## Accumulated Context
 
@@ -66,6 +67,8 @@ Recent decisions affecting current work:
 - [Phase 01-foundation]: Upgraded MSAL from 4.83.1 to 4.83.3 — Extensions.Msal 4.83.3 requires MSAL >= 4.83.3; minor patch with no behavioral difference
 - [Phase 01-foundation]: Test project targets net10.0-windows with UseWPF=true — required to reference WPF main project; net10.0 is framework-incompatible
 - [Phase 01-foundation]: Solution uses .slnx format (new .NET 10 XML solution) — dotnet new sln creates .slnx by default in .NET 10 SDK
+- [Phase 01-foundation]: TenantProfile is a plain mutable class (not record) — System.Text.Json requires settable properties; field names Name/TenantUrl/ClientId match JSON schema exactly
+- [Phase 01-foundation]: SharePointPaginationHelper uses [EnumeratorCancellation] on ct — required for correct WithCancellation() forwarding in async iterators
 
 ### Pending Todos
 
@@ -79,6 +82,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-04-02T10:04:03.486Z
+Last session: 2026-04-02T10:07:59.499Z
-Stopped at: Completed 01-foundation-01-PLAN.md
+Stopped at: Completed 01-foundation-02-PLAN.md
 Resume file: None

.planning/phases/01-foundation/01-02-SUMMARY.md

@@ -0,0 +1,143 @@
+---
+phase: 01-foundation
+plan: 02
+subsystem: core
+tags: [wpf, dotnet10, csom, pnp-framework, serilog, sharepoint, pagination, retry, messaging, csharp]
+
+# Dependency graph
+requires:
+  - 01-01 (solution scaffold, NuGet packages)
+provides:
+  - TenantProfile model matching JSON schema (Name/TenantUrl/ClientId)
+  - OperationProgress record with Indeterminate factory for IProgress<T> pattern
+  - TenantSwitchedMessage and LanguageChangedMessage broadcast-ready via WeakReferenceMessenger
+  - SharePointPaginationHelper: async iterator bypassing 5k item limit via ListItemCollectionPosition
+  - ExecuteQueryRetryHelper: exponential backoff on 429/503 with IProgress<OperationProgress> surfacing
+  - LogPanelSink: custom Serilog ILogEventSink writing to RichTextBox via Dispatcher.InvokeAsync
+affects:
+  - 01-03 (ProfileService uses TenantProfile)
+  - 01-04 (MsalClientFactory uses TenantProfile.ClientId/TenantUrl)
+  - 01-05 (TranslationSource sends LanguageChangedMessage; LoggingIntegration uses LogPanelSink)
+  - 01-06 (FeatureViewModelBase uses OperationProgress + IProgress<T> pattern)
+  - 02-xx (all SharePoint feature services use pagination and retry helpers)
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - IAsyncEnumerable<ListItem> with [EnumeratorCancellation] for correct WithCancellation support
+    - ListItemCollectionPosition loop (do/while until null) for CSOM pagination past 5k items
+    - Exponential backoff: delay = 2^attempt * 5s (10, 20, 40, 80, 160s) up to MaxRetries=5
+    - WeakReferenceMessenger messages via ValueChangedMessage<T> base class
+    - Dispatcher.InvokeAsync for thread-safe UI writes from Serilog background thread
+
+key-files:
+  created:
+    - SharepointToolbox/Core/Models/TenantProfile.cs
+    - SharepointToolbox/Core/Models/OperationProgress.cs
+    - SharepointToolbox/Core/Messages/TenantSwitchedMessage.cs
+    - SharepointToolbox/Core/Messages/LanguageChangedMessage.cs
+    - SharepointToolbox/Core/Helpers/SharePointPaginationHelper.cs
+    - SharepointToolbox/Core/Helpers/ExecuteQueryRetryHelper.cs
+    - SharepointToolbox/Infrastructure/Logging/LogPanelSink.cs
+  modified: []
+
+key-decisions:
+  - "TenantProfile is a plain class (not record) — mutable for System.Text.Json deserialization; fields Name/TenantUrl/ClientId match existing JSON schema casing"
+  - "SharePointPaginationHelper uses [EnumeratorCancellation] on ct parameter — required for correct cancellation forwarding when callers use WithCancellation(ct)"
+  - "ExecuteQueryRetryHelper uses catch-when filter with IsThrottleException — matches 429/503 status codes and 'throttl' text in message, covers PnP.Framework exception surfaces"
+
+requirements-completed:
+  - FOUND-05
+  - FOUND-06
+  - FOUND-07
+  - FOUND-08
+
+# Metrics
+duration: 1min
+completed: 2026-04-02
+---
+
+# Phase 1 Plan 02: Core Models, Messages, and Infrastructure Helpers Summary
+
+**7 Core/Infrastructure files providing typed contracts (TenantProfile, OperationProgress, messages, CSOM pagination helper, throttle-aware retry helper, RichTextBox Serilog sink) — 0 errors, 0 warnings**
+
+## Performance
+
+- **Duration:** 1 min
+- **Started:** 2026-04-02T10:04:59Z
+- **Completed:** 2026-04-02T10:06:00Z
+- **Tasks:** 2
+- **Files modified:** 7
+
+## Accomplishments
+
+- All 7 Core/Infrastructure files created and compiling with 0 errors, 0 warnings
+- TenantProfile fields match JSON schema exactly (Name/TenantUrl/ClientId)
+- OperationProgress record with Indeterminate factory, usable by all feature services via IProgress<T>
+- TenantSwitchedMessage and LanguageChangedMessage correctly inherit ValueChangedMessage<T> for WeakReferenceMessenger broadcast
+- SharePointPaginationHelper iterates past 5,000 items using ListItemCollectionPosition do/while loop; RowLimit=2000
+- ExecuteQueryRetryHelper surfaces retry events via IProgress<OperationProgress> with exponential backoff (10s, 20s, 40s, 80s, 160s)
+- LogPanelSink writes color-coded, timestamped entries to RichTextBox via Dispatcher.InvokeAsync for thread safety
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Core models and WeakReferenceMessenger messages** - `ddb216b` (feat)
+2. **Task 2: SharePointPaginationHelper, ExecuteQueryRetryHelper, LogPanelSink** - `c297801` (feat)
+
+**Plan metadata:** (docs commit follows)
+
+## Files Created/Modified
+
+- `SharepointToolbox/Core/Models/TenantProfile.cs` - Plain class; Name/TenantUrl/ClientId match JSON schema
+- `SharepointToolbox/Core/Models/OperationProgress.cs` - Record with Indeterminate factory; IProgress<T> contract
+- `SharepointToolbox/Core/Messages/TenantSwitchedMessage.cs` - ValueChangedMessage<TenantProfile>; WeakReferenceMessenger broadcast
+- `SharepointToolbox/Core/Messages/LanguageChangedMessage.cs` - ValueChangedMessage<string>; WeakReferenceMessenger broadcast
+- `SharepointToolbox/Core/Helpers/SharePointPaginationHelper.cs` - Async iterator; ListItemCollectionPosition loop; [EnumeratorCancellation]
+- `SharepointToolbox/Core/Helpers/ExecuteQueryRetryHelper.cs` - Retry on 429/503/throttle; exponential backoff; IProgress surfacing
+- `SharepointToolbox/Infrastructure/Logging/LogPanelSink.cs` - ILogEventSink; Dispatcher.InvokeAsync; color-coded by level
+
+## Decisions Made
+
+- TenantProfile is a plain mutable class (not a record) — System.Text.Json deserialization requires a parameterless constructor and settable properties; field names match the existing JSON schema exactly to avoid serialization mismatches.
+- SharePointPaginationHelper.GetAllItemsAsync decorates `ct` with `[EnumeratorCancellation]` — without this attribute, cancellation tokens passed via `WithCancellation()` on the async enumerable are silently ignored. This is a correctness requirement for callers who use the cancellation pattern.
+- ExecuteQueryRetryHelper.IsThrottleException checks for "429", "503", and "throttl" (case-insensitive) — PnP.Framework surfaces HTTP errors in the exception message rather than a dedicated exception type; this covers all known throttle surfaces.
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 2 - Missing critical functionality] Added [EnumeratorCancellation] attribute to SharePointPaginationHelper**
+- **Found during:** Task 2 (dotnet build)
+- **Issue:** CS8425 warning — async iterator with `CancellationToken ct` parameter missing `[EnumeratorCancellation]`; without it, cancellation via `WithCancellation(ct)` on the `IAsyncEnumerable<T>` is silently dropped, breaking cancellation for all callers
+- **Fix:** Added `using System.Runtime.CompilerServices;` and `[EnumeratorCancellation]` attribute on the `ct` parameter
+- **Files modified:** `SharepointToolbox/Core/Helpers/SharePointPaginationHelper.cs`
+- **Verification:** Build 0 warnings, 0 errors after fix
+- **Committed in:** c297801 (Task 2 commit)
+
+---
+
+**Total deviations:** 1 auto-fixed (Rule 2 — missing critical functionality for correct cancellation behavior)
+**Impact on plan:** Fix required for correct operation. One line change, no scope creep.
+
+## Issues Encountered
+
+None beyond the auto-fixed deviation above.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- All contracts in place for plan 01-03 (ProfileService uses TenantProfile)
+- All contracts in place for plan 01-04 (MsalClientFactory uses TenantProfile.ClientId/TenantUrl)
+- All contracts in place for plan 01-05 (LoggingIntegration uses LogPanelSink; LanguageChangedMessage for TranslationSource)
+- All contracts in place for plan 01-06 (FeatureViewModelBase uses OperationProgress + IProgress<T>)
+- All Phase 2+ SharePoint feature services can use pagination and retry helpers immediately
+
+---
+*Phase: 01-foundation*
+*Completed: 2026-04-02*