chore: complete v1.0 milestone

Archive 5 phases (36 plans) to milestones/v1.0-phases/.
Archive roadmap, requirements, and audit to milestones/.
Evolve PROJECT.md with shipped state and validated requirements.
Collapse ROADMAP.md to one-line milestone summary.

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

.planning/milestones/v1.0-phases/05-distribution-and-hardening/05-03-SUMMARY.md

@@ -0,0 +1,98 @@
+---
+phase: 05-distribution-and-hardening
+plan: "03"
+subsystem: testing
+tags: [dotnet, wpf, publish, single-file, localization, smoke-test]
+
+# Dependency graph
+requires:
+  - phase: 05-01
+    provides: helper unit tests (ExecuteQueryRetryHelper, SharePointPagination, LocaleCompleteness)
+  - phase: 05-02
+    provides: French diacritic fixes and single-file publish configuration
+provides:
+  - Full integration test run confirming all three workstreams pass together
+  - Published single-file EXE (201 MB, 0 loose DLLs) verified on clean machine
+  - Human sign-off: EXE launches, French locale correct, all 10 tabs render without crashes
+affects: []
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: []
+
+key-files:
+  created: []
+  modified: []
+
+key-decisions: []
+
+patterns-established: []
+
+requirements-completed:
+  - FOUND-11
+
+# Metrics
+duration: 15min
+completed: 2026-04-03
+---
+
+# Phase 5 Plan 03: Integration Verification and Human Sign-Off Summary
+
+**134 tests pass, 22 skipped, 0 fail — single-file EXE (201 MB, 0 loose DLLs) confirmed on clean machine with French locale correct**
+
+## Performance
+
+- **Duration:** ~15 min
+- **Started:** 2026-04-03T14:30:00Z
+- **Completed:** 2026-04-03T15:00:00Z
+- **Tasks:** 2 (1 auto + 1 human-verify)
+- **Files modified:** 0 (verification-only plan)
+
+## Accomplishments
+
+- Full test suite green: 134 pass, 22 skip (known interactive MSAL flows), 0 fail — including all new Phase 5 Plan 01 helpers and locale completeness tests
+- Published SharepointToolbox.exe confirmed as single self-contained file at 201 MB with exactly 0 loose DLL files in ./publish/
+- Human smoke test approved: application launches on clean machine, French diacritics display correctly across all views, all 10 tabs render without crashes
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Run full test suite and verify publish artifact** - `e0e3d55` (chore)
+2. **Task 2: Human smoke test — EXE launch and French locale verification** - Human approved (no code commit)
+
+**Plan metadata:** (this docs commit)
+
+## Files Created/Modified
+
+None — this was a verification-only plan. All prior work was committed in Plans 05-01 and 05-02.
+
+## Decisions Made
+
+None - followed plan as specified. All integration checks passed on first attempt with no fixes required.
+
+## Deviations from Plan
+
+None - plan executed exactly as written. Test suite was green and publish artifact was correct on first run.
+
+## Issues Encountered
+
+None. The FR diacritics test (FrStrings_ContainExpectedDiacritics) passed immediately, confirming Plan 05-02's fixes were complete. Publish produced a single self-contained EXE with no loose DLLs on first attempt.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+Phase 5 (Distribution and Hardening) is complete. All three workstreams integrated successfully:
+- Plan 05-01: helper internals + unit tests
+- Plan 05-02: French locale diacritics + single-file publish config
+- Plan 05-03: full integration gate + human sign-off
+
+The application is ready for distribution. The published EXE is at `./publish/SharepointToolbox.exe`.
+
+---
+*Phase: 05-distribution-and-hardening*
+*Completed: 2026-04-03*