Add rejected mutation requeue flow in sync UI

docs/progress.md

@@ -2,6 +2,35 @@
 
 Updated: 2026-02-15
 
+## Latest Milestone (2026-02-15): Rejected-Mutation Requeue Flow
+
+Extended sync conflict handling so rejected mutations can be retried after local
+fixes:
+
+- Expanded sync state model:
+  - `lib/features/sync/sync_state.dart`
+  - stores `lastRejectedChanges` alongside rejection reasons
+- Updated sync queue repository:
+  - `lib/features/sync/sync_queue_repository.dart`
+  - captures rejected envelopes during push
+  - adds `requeueRejectedChanges()` to move rejected envelopes back into pending
+    queue
+  - keeps clear/dismiss behavior for rejected metadata
+- Updated sync UX:
+  - `lib/features/sync/sync_view.dart`
+  - rejected section now includes:
+    - entity context (`entityType:entityId`)
+    - `Requeue` action for manual retry flow
+    - existing `Dismiss` action
+- Added/updated tests:
+  - `test/features/sync/sync_queue_repository_test.dart`
+  - verifies rejected envelope capture and requeue behavior
+
+Validation for this milestone:
+
+- `flutter analyze` -> pass
+- `flutter test` -> pass
+
 ## Latest Milestone (2026-02-15): Sync Auto-Trigger Backoff
 
 Improved sync trigger resilience for repeated failures:
@@ -82,8 +111,7 @@ 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:
-   - current UX shows and dismisses rejections; still missing guided
-     resolve/retry/inspect flows per entity.
+   - reject/requeue is implemented; still missing guided per-entity repair UI.
 3. Sync trigger maturity:
    - connectivity-aware triggers are still missing.
 4. Test depth: