Add rejection payload inspection in sync view

docs/progress.md

@@ -2,6 +2,21 @@
 
 Updated: 2026-02-15
 
+## Latest Milestone (2026-02-15): Sync Rejection Payload Inspection
+
+Improved conflict handling UX in Sync view:
+
+- Updated `lib/features/sync/sync_view.dart`:
+  - each rejected mutation now supports payload inspect/expand
+  - shows formatted local envelope payload JSON for failed mutations when
+    available
+  - keeps requeue/dismiss actions for operator control
+
+Validation for this milestone:
+
+- `flutter analyze` -> pass
+- `flutter test` -> pass
+
 ## Latest Milestone (2026-02-15): Reachability-Gated Auto Sync
 
 Added connectivity-aware gating to background sync auto-triggers:
@@ -157,7 +172,8 @@ Validation for this milestone:
    - replace no-op scheduler with platform local notifications implementation
      for Android/iOS/macOS/Windows/Linux/Web-safe fallback.
 2. Conflict resolution UX:
-   - reject/requeue is implemented; still missing guided per-entity repair UI.
+   - reject/requeue + payload inspect are implemented; future enhancement is
+     direct deep-link navigation to entity edit screens from Sync view.
 3. Sync trigger maturity:
    - implemented via reachability gating; future improvement is explicit OS
      connectivity event subscription.