chore: record journal

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

@@ -278,3 +278,24 @@ Parsed building multipolygon relations, generated building holes, and respected
 ### Status
 
 [OK] **Completed**
+
+
+## Session 14: Add area diagnostics command
+
+**Date**: 2026-08-04
+**Task**: Add area diagnostics command
+**Branch**: `main`
+
+### Summary
+
+Added a fast diagnose:area command for OSM structure, building relation health, artifact status, and GLB digest checks; shared area config normalization between build and diagnostics.
+
+### Git Commits
+
+| Hash | Message |
+|------|---------|
+| `d4c3baf` | (see git log) |
+
+### Status
+
+[OK] **Completed**