docs(06-05): complete GlobalSiteSelectionTests plan — phase 6 done

- SUMMARY.md created with test coverage details and decision rationale
- STATE.md updated: progress 100%, decisions recorded, session logged
- ROADMAP.md phase 6 marked Complete (5/5 plans with summaries)

.planning/ROADMAP.md

@@ -20,7 +20,7 @@
 
 **v1.1 Enhanced Reports**
 
-- [ ] **Phase 6: Global Site Selection** — Toolbar-level multi-site picker that all feature tabs consume as their default target
+- [x] **Phase 6: Global Site Selection** — Toolbar-level multi-site picker that all feature tabs consume as their default target (completed 2026-04-07)
 - [ ] **Phase 7: User Access Audit** — New feature tab: export every SharePoint/Teams access a specific user holds across selected sites
 - [ ] **Phase 8: Simplified Permissions** — Plain-language labels, summary counts, color coding, and detail-level toggle on the permissions report
 - [ ] **Phase 9: Storage Visualization** — Charting dependency + pie/donut and bar chart views of storage by file type in the Storage Metrics tab
@@ -36,7 +36,7 @@
   2. Selecting sites in the toolbar causes all feature tabs to default to those sites when an operation is run
   3. A user can override the global selection on any individual tab without clearing the global state
   4. The global site selection persists across tab switches within the same session
-**Plans:** 4/5 plans executed
+**Plans:** 5/5 plans complete
 Plans:
 - [ ] 06-01-PLAN.md — GlobalSitesChangedMessage + FeatureViewModelBase extension
 - [ ] 06-02-PLAN.md — MainWindowViewModel global selection state + command
@@ -86,7 +86,7 @@ Plans:
 | 3. Storage and File Operations | v1.0 | 8/8 | Complete | 2026-04-02 |
 | 4. Bulk Operations and Provisioning | v1.0 | 10/10 | Complete | 2026-04-03 |
 | 5. Distribution and Hardening | v1.0 | 3/3 | Complete | 2026-04-03 |
-| 6. Global Site Selection | 4/5 | In Progress|  | - |
+| 6. Global Site Selection | 5/5 | Complete   | 2026-04-07 | - |
 | 7. User Access Audit | v1.1 | 0/? | Not started | - |
 | 8. Simplified Permissions | v1.1 | 0/? | Not started | - |
 | 9. Storage Visualization | v1.1 | 0/? | Not started | - |

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: completed
-stopped_at: Completed 06-04-PLAN.md — all 6 tab VMs wired to OnGlobalSitesChanged with local override protection
+stopped_at: Completed 06-05-PLAN.md — 10 GlobalSiteSelectionTests covering full global site selection contract
-last_updated: "2026-04-07T08:10:03.678Z"
+last_updated: "2026-04-07T08:14:30.489Z"
 last_activity: 2026-04-07 — Roadmap created (Phases 6-9), 10/10 requirements mapped
 progress:
   total_phases: 4
-  completed_phases: 0
+  completed_phases: 1
   total_plans: 5
-  completed_plans: 4
+  completed_plans: 5
 ---
 
 # Project State
@@ -46,6 +46,7 @@ Phase 6 [ ] → Phase 7 [ ] → Phase 8 [ ] → Phase 9 [ ]
 | Phase 06-global-site-selection P01 | 2 | 2 tasks | 3 files |
 | Phase 06-global-site-selection P03 | 2 | 3 tasks | 5 files |
 | Phase 06-global-site-selection P04 | 2 | 3 tasks | 6 files |
+| Phase 06-global-site-selection P05 | 2 | 1 tasks | 1 files |
 
 ## Accumulated Context
 
@@ -66,6 +67,8 @@ Decisions are logged in PROJECT.md Key Decisions table.
 - [Phase 06-global-site-selection]: PermissionsViewModel uses _hasLocalSiteOverride guard for SelectedSites; site picker sets flag, tenant switch resets it
 - [Phase 06-global-site-selection]: Single-site VMs use partial void OnSiteUrlChanged to detect local typing; clearing field reverts to global
 - [Phase 06-global-site-selection]: BulkMembersViewModel confirmed excluded: no SiteUrl field, CSV-driven per-row site URLs
+- [Phase 06-global-site-selection]: Test 8 asserts override-reset via next global sites message (not SiteUrl='' — OnSiteUrlChanged re-applies global immediately when cleared)
+- [Phase 06-global-site-selection]: Used reflection to set _hasLocalSiteOverride in PermissionsViewModel test — avoids needing a real SitePickerDialog
 
 ### Pending Todos
 
@@ -77,6 +80,6 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-04-07T08:10:03.675Z
+Last session: 2026-04-07T08:14:30.486Z
-Stopped at: Completed 06-04-PLAN.md — all 6 tab VMs wired to OnGlobalSitesChanged with local override protection
+Stopped at: Completed 06-05-PLAN.md — 10 GlobalSiteSelectionTests covering full global site selection contract
 Resume file: None

.planning/phases/06-global-site-selection/06-05-SUMMARY.md

@@ -0,0 +1,120 @@
+---
+phase: 06-global-site-selection
+plan: 05
+subsystem: testing
+tags: [xunit, moq, wpf, mvvm, weak-reference-messenger, global-sites]
+
+# Dependency graph
+requires:
+  - phase: 06-global-site-selection/06-01
+    provides: GlobalSitesChangedMessage, FeatureViewModelBase.GlobalSites, OnGlobalSitesChanged virtual hook
+  - phase: 06-global-site-selection/06-02
+    provides: MainWindowViewModel.GlobalSelectedSites, GlobalSitesSelectedLabel
+  - phase: 06-global-site-selection/06-04
+    provides: Tab VM OnGlobalSitesChanged overrides with local override protection
+provides:
+  - GlobalSiteSelectionTests (10 unit tests covering full global site selection contract)
+  - Test coverage for message broadcast, base class reception, single/multi-site pre-fill
+  - Test coverage for local override, override reset, tenant switch clearing, label update
+affects: []
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "TestFeatureViewModel inner class pattern — expose protected property for assertion via public accessor"
+    - "WeakReferenceMessenger.Default.Reset() in test constructor — prevents cross-test message contamination"
+    - "Reflection to set private bool flag (_hasLocalSiteOverride) for testing guard conditions without requiring a dialog to open"
+
+key-files:
+  created:
+    - SharepointToolbox.Tests/ViewModels/GlobalSiteSelectionTests.cs
+  modified: []
+
+key-decisions:
+  - "Test 8 (tenant switch) verifies override reset by sending new global sites after TenantSwitchedMessage — cleaner than asserting SiteUrl='' since OnSiteUrlChanged immediately re-applies global when SiteUrl is cleared and GlobalSites is non-empty"
+  - "Used reflection to set _hasLocalSiteOverride in PermissionsViewModel override test — avoids needing a real SitePickerDialog; acceptable for unit test scenario coverage"
+  - "MainWindowViewModel instantiated with real ProfileRepository (temp file path) and MsalClientFactory() — avoids needing to refactor VM for testability while still keeping test hermetic"
+
+patterns-established:
+  - "Messenger reset pattern: WeakReferenceMessenger.Default.Reset() in constructor prevents leakage between WeakReferenceMessenger-heavy tests"
+
+requirements-completed:
+  - SITE-01
+  - SITE-02
+
+# Metrics
+duration: 3min
+completed: 2026-04-07
+---
+
+# Phase 06 Plan 05: GlobalSiteSelectionTests Summary
+
+**10 unit tests validating the full global site selection contract — message broadcast, base class GlobalSites property, single-site pre-fill, multi-site pre-populate, local override protection, override reset on clear, tenant switch clearing, and toolbar label count**
+
+## Performance
+
+- **Duration:** ~3 min
+- **Started:** 2026-04-07T08:11:40Z
+- **Completed:** 2026-04-07T08:14:30Z
+- **Tasks:** 1
+- **Files modified:** 1 created
+
+## Accomplishments
+- All 10 tests pass covering both SITE-01 (global consumption) and SITE-02 (local override) requirements
+- Total test suite grows from 134 to 144 passing tests (22 skipped unchanged)
+- Tests exercise the full flow: MainWindowViewModel broadcasts, FeatureViewModelBase receives, tab VMs react, local override blocks global, tenant switch resets state
+- No regressions in any pre-existing test
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create GlobalSiteSelectionTests with comprehensive test coverage** - `80ef092` (test)
+
+## Files Created/Modified
+- `SharepointToolbox.Tests/ViewModels/GlobalSiteSelectionTests.cs` — 10 xUnit Fact tests covering all critical paths in the global site selection flow
+
+## Decisions Made
+- Test 8 revised to verify override-reset behavior indirectly: after `TenantSwitchedMessage`, sending new global sites verifies override was cleared (the simpler `Assert.Equal("", SiteUrl)` was wrong — `OnSiteUrlChanged` immediately re-applies GlobalSites when SiteUrl is cleared and GlobalSites is non-empty, which is correct designed behavior)
+- Used `System.Reflection` to set `_hasLocalSiteOverride` on `PermissionsViewModel` for Test 7 — allows testing the guard without requiring a live dialog factory
+- `MainWindowViewModel` instantiated via concrete `ProfileRepository(tempFile)` and `new MsalClientFactory()` — no refactoring needed, test remains hermetic
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 1 - Bug] Corrected Test 8 assertion to match actual StorageViewModel behavior**
+- **Found during:** Task 1 (first test run)
+- **Issue:** Initial Test 8 asserted `vm.SiteUrl == string.Empty` after tenant switch, but `OnSiteUrlChanged` immediately re-applies `GlobalSites[0].Url` when SiteUrl is cleared and GlobalSites is non-empty — this is correct, designed behavior (clearing = revert to global)
+- **Fix:** Rewrote test to assert the real contract: after tenant switch, override flag is reset, so the next global sites message is applied to SiteUrl
+- **Files modified:** SharepointToolbox.Tests/ViewModels/GlobalSiteSelectionTests.cs
+- **Verification:** All 10 tests pass
+- **Committed in:** 80ef092 (Task 1 commit)
+
+---
+
+**Total deviations:** 1 auto-fixed (1 bug — incorrect test assertion)
+**Impact on plan:** Fix was necessary for test correctness; the assertion was wrong about the expected behavior, not the VM code.
+
+## Issues Encountered
+- First test run had 9/10 passing; Test 8 failed because the assertion tested an intermediate state that the VM immediately transitions through (SiteUrl clears then immediately re-fills from GlobalSites). Fixed by testing the stable end state instead.
+
+## User Setup Required
+None — no external service configuration required.
+
+## Self-Check: PASSED
+
+File exists: SharepointToolbox.Tests/ViewModels/GlobalSiteSelectionTests.cs
+Commit 80ef092 exists in git log.
+All 10 tests pass: `dotnet test --filter "GlobalSiteSelection"` → 10 Passed, 0 Failed.
+No regressions: full suite → 144 Passed, 22 Skipped.
+
+## Next Phase Readiness
+- Phase 6 is complete — all 5 plans executed, all requirements SITE-01 and SITE-02 covered
+- The global site selection feature is fully implemented and tested end-to-end
+- No blockers for Phase 7
+
+---
+*Phase: 06-global-site-selection*
+*Completed: 2026-04-07*