chore: archive v1.1 Enhanced Reports milestone

v1.1 shipped with 4 phases (25 plans), 10/10 requirements complete:
- Global site selection (toolbar picker, all tabs consume)
- User access audit (Graph people-picker, direct/group/inherited)
- Simplified permissions (plain-language labels, risk levels, detail toggle)
- Storage visualization (LiveCharts2 pie/donut + bar charts)

Post-phase polish: centralized site selection (removed per-tab pickers),
claims prefix stripping, StorageMetrics backfill, chart tooltip fix,
summary stats in app + HTML exports.

205 tests passing, 10,484 LOC.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/milestones/v1.1-REQUIREMENTS.md

@@ -0,0 +1,57 @@
+# Requirements Archive: SharePoint Toolbox v1.1 Enhanced Reports
+
+**Defined:** 2026-04-07
+**Completed:** 2026-04-08
+**Coverage:** 10/10 requirements complete
+
+## Requirements
+
+### Global Site Selection
+
+- [x] **SITE-01**: User can select one or multiple target sites from the toolbar and all feature tabs use that selection as default
+- [x] **SITE-02**: User can override global site selection per-tab for single-site operations
+  - *Outcome: Initially implemented, later removed — per-tab selectors replaced by centralized global-only selection*
+
+### User Access Audit
+
+- [x] **UACC-01**: User can export all SharePoint/Teams accesses a specific user has across selected sites
+- [x] **UACC-02**: Export includes direct assignments, group memberships, and inherited access
+
+### Simplified Permissions
+
+- [x] **SIMP-01**: User can toggle plain-language permission labels (e.g., "Can edit files" instead of "Contribute")
+- [x] **SIMP-02**: Permissions report includes summary counts and color coding for untrained readers
+- [x] **SIMP-03**: User can choose detail level (simple/detailed) for reports
+
+### Storage Visualization
+
+- [x] **VIZZ-01**: Storage Metrics tab includes a graph showing space by file type
+- [x] **VIZZ-02**: User can toggle between pie/donut chart and bar chart views
+- [x] **VIZZ-03**: Graph updates automatically when storage scan completes
+
+## Traceability
+
+| Requirement | Phase | Status | Notes |
+|-------------|-------|--------|-------|
+| SITE-01 | Phase 6 | Complete | |
+| SITE-02 | Phase 6 | Complete | Per-tab override later removed in favor of global-only |
+| UACC-01 | Phase 7 | Complete | |
+| UACC-02 | Phase 7 | Complete | |
+| SIMP-01 | Phase 8 | Complete | 11 standard SharePoint roles mapped |
+| SIMP-02 | Phase 8 | Complete | 4 risk levels: High/Medium/Low/ReadOnly |
+| SIMP-03 | Phase 8 | Complete | |
+| VIZZ-01 | Phase 9 | Complete | LiveCharts2 SkiaSharp backend |
+| VIZZ-02 | Phase 9 | Complete | |
+| VIZZ-03 | Phase 9 | Complete | |
+
+## Out of Scope
+
+| Feature | Reason |
+|---------|--------|
+| Cross-platform (Mac/Linux) | WPF is Windows-only |
+| Real-time monitoring / alerts | Requires background service |
+| Automated remediation (auto-revoke) | Liability risk |
+| Content migration between tenants | Separate product category |
+
+---
+*Archived: 2026-04-08*