chore: record journal

.trellis/workspace/dingkang/journal-1.md

@@ -257,3 +257,24 @@ Added an explicit compress stage and GLB compression script for nantaizi WebP re
 ### Status
 
 [OK] **Completed**
+
+
+## Session 13: Fix OSM multipolygon buildings
+
+**Date**: 2026-08-03
+**Task**: Fix OSM multipolygon buildings
+**Branch**: `main`
+
+### Summary
+
+Parsed building multipolygon relations, generated building holes, and respected explicit OSM height for nantaizi relation -65.
+
+### Git Commits
+
+| Hash | Message |
+|------|---------|
+| `95f8458` | (see git log) |
+
+### Status
+
+[OK] **Completed**